dy 1/ 13 Find if y=x dx dy II dx (Type an exact answer.)

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Answer 1

To find dy/dx if y = x^(-1/3), we differentiate y with respect to x using the power rule. The derivative is dy/dx = -1/3 * x^(-4/3).

Given y = x^(-1/3), we can find dy/dx by differentiating y with respect to x. Applying the power rule, the derivative of x^n is n * x^(n-1), where n is a constant. In this case, n = -1/3, so the derivative of y = x^(-1/3) is dy/dx = (-1/3) * x^(-1/3 - 1) = (-1/3) * x^(-4/3). Therefore, the derivative dy/dx of y = x^(-1/3) is -1/3 * x^(-4/3). The power rule for differentiation is used to differentiate algebraic expressions with power, that is if the algebraic expression is of form xn, where n is a real number, then we use the power rule to differentiate it. Using this rule, the derivative of xn is written as the power multiplied by the expression and we reduce the power by 1. So, the derivative of xn is written as nxn-1. This implies the power rule derivative is also used for fractional powers and negative powers along with positive powers.

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Related Questions

question 2
2) Evaluate S x arcsin x dx by using suitable technique of integration.

Answers

The evaluation of ∫x * arcsin(x) dx is (1/2) x + C, where C is the constant of integration.

To evaluate the integral ∫x * arcsin(x) dx, we can use integration by parts, which is a common technique for integrating products of functions.

Let's start by considering the product of two functions: u = arcsin(x) and dv = x dx. We can find du and v by differentiating and integrating, respectively.

du = d(arcsin(x)) = 1/sqrt(1 - x^2) dx

v = ∫x dx = (1/2) x^2

Now, we can apply the integration by parts formula:

∫u dv = uv - ∫v du

Plugging in the values we found:

∫x * arcsin(x) dx = (1/2) x^2 * arcsin(x) - ∫(1/2) x^2 * (1/sqrt(1 - x^2)) dx

Simplifying, we have:

∫x * arcsin(x) dx = (1/2) x^2 * arcsin(x) - (1/2) ∫x^2 / sqrt(1 - x^2) dx

To evaluate the remaining integral, we can use a trigonometric substitution. Let's substitute x = sin(θ), which implies dx = cos(θ) dθ:

∫x^2 / sqrt(1 - x^2) dx = (1/2) ∫sin^2(θ) / sqrt(1 - sin^2(θ)) * cos(θ) dθ

Using the trigonometric identity sin^2(θ) = 1 - cos^2(θ), we can simplify further:

∫x^2 / sqrt(1 - x^2) dx = (1/2) ∫(1 - cos^2(θ)) / sqrt(1 - (1 - cos^2(θ))) * cos(θ) dθ

= (1/2) ∫cos^2(θ) / cos(θ) dθ

= (1/2) ∫cos(θ) dθ

Integrating cos(θ) with respect to θ gives sin(θ):

∫x^2 / sqrt(1 - x^2) dx = (1/2) sin(θ) + C

Now, we need to convert back from θ to x. Since we previously substituted x = sin(θ), we can use the inverse sine function to express θ in terms of x:

sin(θ) = x

θ = arcsin(x)

Finally, substituting back:

∫x * arcsin(x) dx = (1/2) sin(θ) + C

= (1/2) x + C

Therefore, the evaluation of ∫x * arcsin(x) dx is (1/2) x + C, where C is the constant of integration.

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Consider the parametric curve given by =²+1 and y=1²-2t+1 At what point on the curve will the slope of the tangent line be 1? O (3, 1) O (1, 1) O There is no such a point. O (9,9)

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Considering the parametric curve given by =²+1 and y=1²-2t+1, the point on the curve where the slope of the tangent line is 1 is (3, 1).

To find the point on the curve where the slope of the tangent line is 1, we need to determine the values of t that satisfy this condition. We can start by finding the derivatives of x and y with respect to t.

Taking the derivative of x = t^2 + 1, we get dx/dt = 2t.

Taking the derivative of y = 1^2 - 2t + 1, we get dy/dt = -2.

The slope of the tangent line at a point on the curve is given by dy/dx, which is equal to dy/dt divided by dx/dt.

Therefore, we have dy/dx = dy/dt / dx/dt = -2 / 2t = -1/t.

To find the point where the slope of the tangent line is 1, we need to solve the equation -1/t = 1. Solving for t gives us t = -1.

However, this value of t is not valid because the parameter t cannot be negative for the given curve.

Therefore, there is no point on the curve where the slope of the tangent line is 1. The correct answer is "There is no such point."

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The demand for a particular item is given by the function D(x) = 2,000 - 3x? Find the consumer's surplus if the equilibrium price of a unit $125. The consumer's surplus is $| TIP Enter your answer as an integer or decimal number

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The consumer's surplus for one unit of the item is $1,872, representing the additional value gained by consumers when purchasing the item at a price below the equilibrium price.

To find the consumer's surplus, we need to calculate the area between the demand curve and the equilibrium price line. The demand function D(x) = 2,000 - 3x represents the relationship between the price and quantity demanded. The equilibrium price of $125 indicates the price at which the quantity demanded is equal to one unit. By evaluating the consumer's surplus, we can determine the additional value consumers receive from purchasing the item at a price lower than the equilibrium price. To calculate the consumer's surplus, we need to find the area between the demand curve and the equilibrium price line. In this case, the equilibrium price is $125, and we want to find the consumer's surplus for one unit of the item. The consumer's surplus represents the difference between the maximum price a consumer is willing to pay (indicated by the demand function) and the actual price paid (equilibrium price). To calculate the consumer's surplus, we first find the maximum price a consumer is willing to pay by substituting x = 1 (quantity demanded is one unit) into the demand function:

D(1) = 2,000 - 3(1) = 2,000 - 3 = 1,997

The consumer's surplus is then calculated as the difference between the maximum price a consumer is willing to pay and the actual price paid:

Consumer's Surplus = Maximum price - Actual price

= 1,997 - 125

= 1,872

Therefore, the consumer's surplus is $1,872, indicating the additional value consumers receive from purchasing the item at a price lower than the equilibrium price.

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Score on last try: 0 of 1 pts. See Details for more. Get a similar question You can retry this question below Find the area that lies inside r = 3 cos 0 and outside r = 1 + cos 0. m/6 π+√3 X www 11

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The area that lies inside the curve r=3cosθ and outside the curve r=1+cosθ is [tex]A = \frac{3\sqrt3}{2} - \frac{4\pi}{3}[/tex]  square units.

What is the trigonometric ratio?

the trigonometric functions are real functions that relate an angle of a right-angled triangle to ratios of two side lengths. They are widely used in all sciences that are related to geometry, such as navigation, solid mechanics, celestial mechanics, geodesy, and many others.

To find the area that lies inside the curve r=3cosθ and outside the curve r=1+cosθ, we need to determine the limits of integration for θ and set up the integral for calculating the area.

First, let's plot the two curves to visualize the region:

The curves intersect at two points: θ= π/3 and θ= 5π/3.

To find the limits of integration for θ, we need to determine the values where the two curves intersect. By setting the two equations equal to each other:

3cosθ=1+cosθ

Simplifying:

2cosθ=1

cosθ= 1/2

The values of θ where the curves intersect are

θ= π/3 and θ= 5π/3.

To find the area, we'll integrate the difference of the outer curve equation squared and the inner curve equation squared with respect to θ, using the limits of integration from θ= π/3 and θ= 5π/3.

The area can be calculated using the following integral:

[tex]A=\int\limits^{5\pi/3}_{\pi/3} ((3cos\theta)^2 - (1+cos\theta)^2)d\theta[/tex]

Let's simplify and calculate this integral:

[tex]A=\int\limits^{5\pi/3}_{\pi/3} ((8cos^2\theta - 2cos\theta -1)^2)d\theta[/tex]

Now we can integrate this expression:

[tex]A=[ 8/3 sin\theta - sin2\theta) -\theta ]^{5\pi/3}_{\pi/3}[/tex]

Substituting the limits of integration:

[tex]A= ( 8/3 sin(5\pi/3) - sin(10\pi/3) - (5\pi/3) - ( 8/3 sin(\pi/3) - sin(2\pi/3) - (\pi/3)[/tex]

Simplifying the trigonometric values:

[tex]A= ( 8/3 \cdot \sqrt3 /2 - (-\sqrt3 /2) - (5\pi/3) - ( 8/3 \cdot \sqrt3 /2 - \sqrt3 /2 - (\pi/3)[/tex]

[tex]A = \frac{3\sqrt3}{2} - \frac{4\pi}{3}[/tex]

Therefore, the area that lies inside the curve r=3cosθ and outside the curve r=1+cosθ is [tex]A = \frac{3\sqrt3}{2} - \frac{4\pi}{3}[/tex]  square units.

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Let Ps be the regular (planar) triangle. We are going to colorize the three vertices of Ps by 4 different colors (Cyan, Magenta, Yellow, Black). We will identify two colorings of the triangle are the same if two colored triangles can be exactly agreed by a suitable rotation or a reflection. Using Burnside's
formula, determine how many different colored regular triangles are possible.

Answers

Given: We have the regular (planar) triangle named Ps with three vertices colored with 4 different colors (Cyan, Magenta, Yellow, Black).

We need to identify two colorings of the triangle are the same if two colored triangles can be exactly agreed by a suitable rotation or a reflection. Using Burnside's formula, we have to determine how many different colored regular triangles are possible.

Burnside's Lemma:Let X be a finite set and let G be a finite group of permutations of X. Let an element of G be denoted by g. For each g ∈ G let Xg be the set of points in X left fixed by g. Then the number of orbits of X under G is given by:Orbit of G under X= (1/|G|) ∑g∈G |Xg|The group G is the group of symmetries of a regular triangle or an equilateral triangle and it has the following six elements:R0: the identity permutationR120: a counter-clockwise rotation by 120 degreesR240: a counter-clockwise rotation by 240 degrees S1: a reflection through a line going from one vertex through the opposite midpointS2: a reflection through a line going from another vertex through the opposite midpointS3: a reflection through a line going from one side's midpoint through the opposite vertexThe permutation R0 has 4 fixed points since it does not move any vertex. (4 points)

Each of the permutations R120 and R240 has 0 fixed points because every vertex gets moved by these rotations. (0 points)The permutation S1 has 2 fixed points. The two fixed points are the vertices that are not on the line of reflection, and every other point is reflected to a different point. (2 points)The permutation S2 also has 2 fixed points, which are the same as the fixed points of S1. (2 points)The permutation S3 has 3 fixed points, which are the midpoints of each side. (3 points)Thus, by Burnside's formula, we have for the triangle:

[tex]Number of Orbits = (1/|G|) ∑g∈G |Xg|[/tex]

Where, |G|=6=1/6*(4+0+0+2+2+3)=11/3≈3.67

Thus, there are approximately 3.67 different colored regular triangles that are possible when three vertices of a regular triangle are colored with 4 different colors and two colorings of the triangle are the same if two colored triangles can be exactly agreed by a suitable rotation or a reflection.

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consider the cosine function cos : r → r. decide whether this function is injective and whether it is surjective. what if it had been defined as cos : r → [−1,1]?

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The cosine function, cos: R → R, is not injective but is surjective. If the function had been defined as cos: R → [-1, 1], it would still not be injective, but it would be surjective.

The cosine function, cos: R → R, is not injective because it fails the horizontal line test. The cosine function oscillates between values of -1 and 1 over the entire real number line, repeating its values after every period of 2π. This means that multiple input values (angles) can produce the same output value (cosine). Therefore, there exist different real numbers that map to the same value under the cosine function, making it not injective.

However, the cosine function is surjective because it takes on every value in the range of real numbers. For any given real number y, there exists an input value x such that cos(x) = y. This is because the cosine function has a range of (-1, 1), and it covers all values in that range as it oscillates.

If the cosine function had been defined as cos: R → [-1, 1], the function would still not be injective because it would still fail the horizontal line test. However, it would remain surjective because the range of the function matches the specified interval [-1, 1], and every value within that interval can be reached by the cosine function.

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Determine the local max and min of if any exists. f(x)= x f(x)₂. 42+1

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To determine the local maxima and minima of the function f(x) = x^2 + 1, we need to find the critical points and analyze the behavior of the function around those points.

First, let's find the derivative of f(x) with respect to x:

f'(x) = 2x.

To find the critical points, we set f'(x) = 0 and solve for x:

2x = 0,

x = 0.

So the only critical point of the function is x = 0.

Next, we can analyze the behavior of the function around x = 0. Since the derivative is 2x, we can observe that:

- For x < 0, f'(x) < 0, indicating that the function is decreasing.

- For x > 0, f'(x) > 0, indicating that the function is increasing.

From this information, we can conclude that the function has a local minimum at x = 0. At this point, f(0) = (0)^2 + 1 = 1.

Therefore, the function f(x) = x^2 + 1 has a local minimum at x = 0, and there are no local maxima.

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By recognizing each series below as a Taylor series evaluated at
a particular value of x, find the sum of each convergent series. A.
4−433!+455!−477!+⋯+(−1)42+1(2+1)!+⋯= B.
1�
(5 points) By recognizing each series below as a Taylor series evaluated at a particular value of x, find the sum of each convergent series. A. 4 43 3! - 45 (-1)"42n+1 + - 47 7! + + + = 5! (2n+1)! B.

Answers

To find the sum of each convergent series by recognizing them as Taylor series evaluated at a particular value of x.the sum of the series is sin(π/4).

we need to identify the function represented by the series and the center of the series. Then, we can use the formula for the sum of a Taylor series to find the sum.

A. Let's analyze the series:

4 - 4/3! + 4/5! - 4/7! + ...

Recognizing this series as a Taylor series, we can see that it represents the function f(x) = sin(x) evaluated at x = π/4.

The Taylor series expansion of sin(x) centered at x = π/4 is given by:

[tex]sin(x) = (x - π/4) - (1/3!)(x - π/4)^3 + (1/5!)(x - π/4)^5 - (1/7!)(x - π/4)^7 + .[/tex]

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7. A conical tank with equal base and height is being filled with water at a rate of 2 m/min. How fast is the height of the water changing when the height of the water is 7m. As the height increases, does dh/dt increase or decrease. Explain. (V = 1/3(nr2h)

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When the height of the water is 7m, the rate at which the height is changing is 2/(49π) m/min.

To find how fast the height of the water is changing, we need to use the volume formula for a conical tank and differentiate it with respect to time.

The volume formula for a conical tank is V = (1/3)πr^2h, where V is the volume, r is the radius of the base, and h is the height of the water.

Given that water is being filled into the tank at a rate of 2 m/min, we have dV/dt = 2. We want to find dh/dt, the rate at which the height is changing.

Differentiating the volume formula with respect to time, we get:

dV/dt = (1/3)π(2rh)(dh/dt) + (1/3)πr^2(dh/dt)

Since the base radius and height of the tank are equal, we can substitute r = h into the equation:

2 = (1/3)π(2h^2)(dh/dt) + (1/3)πh^2(dh/dt)

Simplifying the equation:

2 = (2/3)πh^2(dh/dt) + (1/3)πh^2(dh/dt)

2 = πh^2(dh/dt)(2/3 + 1/3)

2 = πh^2(dh/dt)(1)

2 = πh^2(dh/dt)

Now, we can solve for dh/dt:

dh/dt = 2/(πh^2)

To find the value of dh/dt when the height of the water is 7m, we substitute h = 7 into the equation:

dh/dt = 2/(π(7^2))

dh/dt = 2/(49π)

Therefore, when the height of the water is 7m, the rate at which the height is changing is 2/(49π) m/min.

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A triangle is made of points A(1, 2, 1), B(2, 5, 3) and C(0, 1, 2). Use vectors to find the area of this triangle.

Answers

To find the area of a triangle using vectors, we can use the formula:

Area = 1/2 * |AB x AC|

where AB is the vector from point A to B, AC is the vector from point A to C, and x represents the cross product. Given the coordinates of points A, B, and C, we can calculate the vectors AB and AC:

AB = B - A = (2, 5, 3) - (1, 2, 1) = (1, 3, 2)

AC = C - A = (0, 1, 2) - (1, 2, 1) = (-1, -1, 1)

Now, we can calculate the cross product of AB and AC:

AB x AC = (1, 3, 2) x (-1, -1, 1)

To calculate the cross product, we can use the determinant:

|i   j   k|

|1   3   2|

|-1 -1   1|

Expanding the determinant, we have:

= i * (3 * 1 - 2 * -1) - j * (1 * 1 - 2 * -1) + k * (1 * -1 - (-1) * 3)

= i * (3 + 2) - j * (1 + 2) + k * (-1 + 3)

= i * 5 - j * 3 + k * 2

= (5, -3, 2)

Now, we can calculate the magnitude of the cross product:

|AB x AC| = √([tex]5^2 + (-3)^2 + 2^2[/tex]) = √38

Finally, we can calculate the area of the triangle:

Area = 1/2 * |AB x AC| = 1/2 * √38

Therefore, the area of the triangle formed by points A(1, 2, 1), B(2, 5, 3), and C(0, 1, 2) is 1/2 * √38.

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this price they regularly occupy 8 Shows that for S$ in will night, A Motel Charges $65 for a room per mant, and at 8 rooms. Research every price rarse more room be vacant. a) Determine demand function Men part al to find the price & revenure are occupoed. rooms C) Calevate when marginal revene is zero. Find out revenue at this time. of the vale find !) What is the sign Ricaurec in 5.c. Hidroy 250 (9 Use

Answers

a) To determine the demand function, let's assume that the motel has 100 rooms in total. If they charge $65 per night for a room, then their total revenue for a fully occupied motel would be:

Total Revenue = Price x Quantity

Total Revenue = $65 x 100

Total Revenue = $6,500

Now let's say they increase their price to $70 per night. Let's assume that at $70 per night, only 90 rooms are occupied. Then their total revenue would be:

Total Revenue = Price x Quantity

Total Revenue = $70 x 90

Total Revenue = $6,300

Repeating this process for different price points;

| Price | Quantity |

| 65 | 100 |

| 70 | 90 |

| 75 | 80 |

| 80 | 70 |

| 85 | 60 |

| 90 | 50 |

Using this data, we can estimate the demand function using linear regression:

Quantity = a - b x Price, where "a" is the intercept and "b" is the slope. Using Excel or a similar tool, we can calculate these values as:

a = 145

b = 2

Therefore, the demand function for this motel is:

Quantity = 145 - 2 x Price

To find out what price will maximize revenue, we need to differentiate the revenue function with respect to price and set it equal to zero:

Revenue = Price x Quantity

Revenue = Price (145 - 2 x Price)

dRevenue/dPrice = 145 - 4 x Price

Setting dRevenue/dPrice equal to zero and solving for Price, we get:

145 - 4 x Price = 0

Price = 36.25

Therefore, the price that maximizes revenue is $36.25 per night. To find out how many rooms will be occupied at this price point, substitute demand function:

Quantity = 145 - 2 x Price

Quantity = 145 - 2 x 36.25

Quantity = 72.5

Therefore, at a price of $36.25 per night, approximately 73 rooms will be occupied.

b) To calculate the revenue when marginal revenue is zero, we need to find the price that corresponds to this condition. Marginal revenue is the derivative of total revenue with respect to quantity:

Marginal Revenue = dRevenue/dQuantity

We know that marginal revenue is zero when revenue is maximized, so we can use the price we found in part a) to calculate revenue:

Revenue = Price x Quantity

Revenue = $36.25 x 72.5

Revenue = $2,625.63

Therefore, when marginal revenue is zero, the motel's revenue is approximately $2,625.63.

c) The sign of the derivative of marginal revenue with respect to quantity tells us whether revenue is increasing or decreasing as quantity increases. If the derivative is positive, then revenue is increasing; if it's negative, then revenue is decreasing; and if it's zero, then revenue is at a maximum or minimum point.

To find the derivative of marginal revenue with respect to quantity, we need to differentiate the demand function twice:

Quantity = 145 - 2 x Price

dQuantity/dPrice = -2

d^2Quantity/dPrice^2 = 0

Using these values, we can calculate the derivative of marginal revenue with respect to quantity as:

dMarginal Revenue/dQuantity = -2 x (d^2Revenue/dQuantity^2)

Since d^2Revenue/dQuantity^2 is zero, we know that dMarginal Revenue/dQuantity is also zero. Therefore, revenue is at a maximum point when marginal revenue is zero.

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can someone help meee!!!!

Answers

x - y is a factor of x² - y² and x³ - y³

Option B is the correct answer.

We have,

To determine if the quantity x - y is a factor of a given expression, we can substitute x = y into the expression and check if the result is equal to zero.

Let's evaluate each expression with x - y and see if it results in zero:

x² - y²:

Substituting x = y, we get (y)² - y² = 0.

Therefore, x - y is a factor of x² - y².

x² + y²:

Substituting x = y, we get (y)² + y² = 2y². Since the result is not zero, x - y is not a factor of x² + y².

x³ - y³:

Substituting x = y, we get (y)³ - y³ = 0.

Therefore, x - y is a factor of x³ - y³.

x³ + y³:

Substituting x = y, we get (y)³ + y³ = 2y³.

Since the result is not zero, x - y is not a factor of x³ + y³.

Thus,

x - y is a factor of x² - y² and x³ - y³, but it is not a factor of x² + y² or x³ + y³.

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Consider the following equation: In(4x + 5) + 4x = 25. Find an integer n so that the interval (n, n+1) contains a solution to this equation. n

Answers

Given equation is ln(4x + 5) + 4x = 25. We are required to find an integer n so that the interval (n, n+1) contains a solution to this equation.

To solve this equation, we have to use numerical methods. We can use the trial and error method or use graphical methods to find the solution.Let's consider the graphical method:First, let's plot the graphs of y = ln(4x + 5) + 4x and y = 25 and see where they intersect. We can use the Desmos graphing calculator for this.Step 1: Visit the Desmos Graphing Calculator website.Step 2: Enter the equations y = ln(4x + 5) + 4x and y = 25 in the given field.Step 3: Adjust the window of the graph to see the intersection points, which are shown in the image below.Image of the graph shown on Desmos calculator.The graph of y = ln(4x + 5) + 4x intersects the graph of y = 25 in the interval (4, 5).Thus, n = 4.Therefore, the solution is as follows:n = 4.

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let f(x) be the function f(x)={x2−c4x 5cfor x<5,for x≥5. find the value of c that makes the function continuous. (use symbolic notation and fractions where needed.) c=

Answers

The value of c that makes the function f(x) continuous is c = 25/4.

To find the value of c that makes the function f(x) continuous, we need to ensure that the function is continuous at x = 5. For a function to be continuous at a point, the left-hand limit and the right-hand limit at that point must be equal, and the value of the function at that point must also be equal to the limit.

For x < 5, the function is given by f(x) = x^2 - c/4x. To find the left-hand limit as x approaches 5, we substitute x = 5 into the function and simplify: lim(x→5-) f(x) = lim(x→5-) (x^2 - c/4x) = 5^2 - c/4 * 5 = 25 - 5c/4.

For x ≥ 5, the function is given by f(x) = c. To find the right-hand limit as x approaches 5, we substitute x = 5 into the function: lim(x→5+) f(x) = lim(x→5+) c = c.

To make the function continuous at x = 5, we equate the left-hand limit and the right-hand limit and set them equal to the value of the function at x = 5: 25 - 5c/4 = c. Solving this equation for c, we find c = 25/4. Therefore, the value of c that makes the function f(x) continuous is c = 25/4.

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The value of c that makes the function continuous is c = 5/6.

To find the value of c that makes the function continuous, we need to ensure that the two pieces of the function, defined for x < 5 and x ≥ 5, match at x = 5.

First, let's evaluate f(x) = x² - c when x < 5 at x = 5:

f(5) = (5)² - c

= 25 - c

Next, let's evaluate f(x) = 4x + 5c when x ≥ 5 at x = 5:

f(5) = 4(5) + 5c

= 20 + 5c

Since the function should be continuous at x = 5, the values of f(x) from both pieces should be equal.

Therefore, we set them equal to each other and solve for c:

25 - c = 20 + 5c

Let's simplify the equation:

25 - 20 = 5c + c

5 = 6c

Dividing both sides by 6:

c = 5/6

So, the value of c that makes the function continuous is c = 5/6.

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Complete question =

Let f(x) be the piecewise function

f(x) = {x²-c for x < 5,

        4x+5c for x≥5}

find the value of c that makes the function continuous. (use symbolic notation and fractions where needed.)

Find the area of the kite.

Answers

Answer:

18m²

Step-by-step explanation:

area = areas of top left triangle + bottom left + top right + bottom right

= (1/2 X 2 X 3) + (1/2 X 2 X 3) + (1/2 X 3 X 4) + (1/2 X 3 X 4)

= 3 + 3 + 6 + 6

= 18 m²

The radius of a circle is 19 m. Find its area to the nearest whole number.

Answers

Answer:

1,134 m²

Step-by-step explanation:

area of a circle = πr²

value of π = 3.14

= 3.14 * (19)²

= 3.14 * 361

= 1,133.54

by rounding off to the nearest whole number,

area of a circle = 1,134 m²

Answer:

1134

Step-by-step explanation:

area of a circle is πrsquare

and π=3.14 so 3.14 multiplied by 19 square=1133.54 approximated to the nearest whole number is 1134

= (#2) [4 pts.] Evaluate the directional derivative Duf (3, 4) if f (x,y) = V x2 + y2 and u is the unit vector in the same direction as (1, -1).

Answers

The directional derivative duf at the point (3, 4) for the function f(x, y) = x² + y², with u being the unit vector in the same direction as (1, -1), is -sqrt(2).

to evaluate the directional derivative, denoted as duf, of the function f(x, y) = x² + y² at the point (3, 4), where u is the unit vector in the same direction as (1, -1), we need to find the dot product between the gradient of f at the given point and the unit vector u.

let's calculate it step by step:

step 1: find the gradient of f(x, y).

the gradient of f(x, y) is given by the partial derivatives of f with respect to x and y. let's calculate them:

∂f/∂x = 2x

∂f/∂y = 2yso, the gradient of f(x, y) is ∇f(x, y) = (2x, 2y).

step 2: normalize the vector (1, -1) to obtain the unit vector u.

to normalize the vector (1, -1), we divide it by its magnitude:

u = sqrt(1² + (-1)²) = sqrt(1 + 1) = sqrt(2)

u = (1/sqrt(2), -1/sqrt(2)) = (sqrt(2)/2, -sqrt(2)/2)

step 3: evaluate duf at the point (3, 4).

to find the directional derivative, we take the dot product of the gradient ∇f(3, 4) = (6, 8) and the unit vector u = (sqrt(2)/2, -sqrt(2)/2):

duf = ∇f(3, 4) · u = (6, 8) · (sqrt(2)/2, -sqrt(2)/2)

= (6 * sqrt(2)/2) + (8 * -sqrt(2)/2)

= 3sqrt(2) - 4sqrt(2)

= -sqrt(2)

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3. A sum of RM5,000 has been used to purchase an annuity that requires periodic payment at every quarter-end for 3 years. The rate of interest is 6% compounded quarterly. (a) How much is the payment to be made at the end of every quarter? (b) Calculate the interest charged on the annuity.

Answers

RM261.84 is the payment to be made at the end of every quarter. RM1,857.92 is the interest charged on the annuity.

To calculate the payment to be made at the end of every quarter, we can use the formula for the present value of an annuity:

PV = PMT * (1 - (1 + r)^(-n)) / r

Where:

PV = Present value of the annuity

PMT = Payment to be made at the end of every quarter

r = Interest rate per period

n = Number of periods

In this case, the present value (PV) is RM5,000, the interest rate (r) is 6% compounded quarterly, and the number of periods (n) is 3 years, which is equivalent to 12 quarters.

(a) Calculate the payment to be made at the end of every quarter:

PV = PMT * (1 - (1 + r)^(-n)) / r

5000 = PMT * (1 - (1 + 0.06/4)^(-12)) / (0.06/4)

Let's solve this equation for PMT:

5000 = PMT * (1 - (1.015)^(-12)) / (0.015)

5000 * (0.015) = PMT * (1 - (1.015)^(-12))

75 = PMT * (1 - 0.7136)

PMT * 0.2864 = 75

PMT = 75 / 0.2864

PMT ≈ RM261.84

So, the payment to be made at the end of every quarter is approximately RM261.84.

(b) Calculate the interest charged on the annuity:

To calculate the interest charged on the annuity, we can subtract the total amount of payments made from the initial investment:

Total Payments = PMT * n

Total Payments = RM261.84 * 12

Total Payments ≈ RM3,142.08

Interest Charged = PV - Total Payments

Interest Charged = RM5,000 - RM3,142.08

Interest Charged ≈ RM1,857.92

Therefore, the interest charged on the annuity is approximately RM1,857.92.

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The volume of the milk produced in a single milking session by a certain breed of cow is
Normally distributed with mean 2.3 gallons with a standard deviation of 0.96 gallons.
Part A Calculate the probability that a randomly selected cow produces between 2.0
gallons and 2.5 gallons in a single milking session. (4 points)
Part B A small dairy farm has 20 of these types of cows. Calculate the probability that the total volume for one milking session for these 20 cows exceeds 50 gallons. (8 points)
Part C Did you need to know that the population distribution of milk volumes per
milking session was Normal in order to complete Parts A or B? Justify your answer.

Answers

Part A: the probability that a cow produces between 2.0 and 2.5 gallons is approximately 0.6826.

Part B: To calculate the probability that the total volume for one milking session for 20 cows exceeds 50 gallons, we need additional information about the correlation or independence of the milk volumes of the 20 cows.

Part A: To calculate the probability that a randomly selected cow produces between 2.0 and 2.5 gallons in a single milking session, we can use the normal distribution. We calculate the z-scores for the lower and upper bounds and then find the area under the curve between these z-scores. Using the mean of 2.3 gallons and standard deviation of 0.96 gallons, we can calculate the z-scores as (2.0 - 2.3) / 0.96 = -0.3125 and (2.5 - 2.3) / 0.96 = 0.2083, respectively. By looking up these z-scores in the standard normal distribution table or using a calculator, we can find the corresponding probabilities.

Part B: To calculate the probability that the total volume for one milking session for 20 cows exceeds 50 gallons, we need to consider the distribution of the sum of 20 independent normally distributed random variables. We can use the properties of the normal distribution to find the mean and standard deviation of the sum of these variables and then calculate the probability using the normal distribution.

Part C: Yes, we needed to know that the population distribution of milk volumes per milking session was normal in order to complete Parts A and B. The calculations in both parts rely on the assumption of a normal distribution to determine the probabilities. If the distribution were not normal, different methods or assumptions would be required to calculate the probabilities accurately.

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help me please i don't have enough time
Let A and B be two matrices of size 4 x 4 such that det(A) = 3. If B is a singular matrix then det(2A-2B7) + 2 = -1 2 None of the mentioned 1

Answers

The value of det(2A-2B7) + 2 is 50.

To determine the value of the expression det(2A-2B7) + 2, we need to consider the properties of determinants and the given information.

Determinant of a Scalar Multiple:

For any matrix A and a scalar k, the determinant of the scalar multiple kA is given by det(kA) = k^n * det(A), where n is the size of the matrix. In this case, A is a 4x4 matrix, so det(2A) = (2^4) * det(A) = 16 * 3 = 48.

Determinant of a Sum/Difference:

The determinant of the sum or difference of two matrices is the sum or difference of their determinants. Therefore, det(2A-2B7) = det(2A) - det(2B7) = 48 - det(2B7).

Singular Matrix:

A singular matrix is a square matrix whose determinant is zero. In this case, B is given as a singular matrix. Therefore, det(B) = 0.

Now, let's analyze the expression det(2A-2B7) + 2:

det(2A-2B7) + 2 = 48 - det(2B7) + 2

Since B is a singular matrix, det(B) = 0, so:

det(2A-2B7) + 2 = 48 - det(2B7) + 2 = 48 - (2^4) * det(B7) + 2

= 48 - 16 * 0 + 2 = 48 + 2 = 50.

Therefore, the value of det(2A-2B7) + 2 is 50.

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15 POINTS
Simplify the expression

Answers

Answer:

[tex] \frac{ {d}^{4} }{ {c}^{3} } [/tex]

Step-by-step explanation:

[tex] {c}^{2} \div {c}^{5} = \frac{1}{ {c}^{3} } [/tex]

[tex] {d}^{5} \div {d}^{1} = {d}^{4} [/tex]

Therefore

[tex] = \frac{ {d}^{4} }{ {c}^{3} } [/tex]

Hope this helps

Use the substitution formula to evaluate the integral. 4 r dr 14+2 O 2V6-4 0-246 +4 o Ovo 1 O √6.2

Answers

The value of the integral ∫(4r / √(14+2r^2)) dr is 2√(14+2r^2) + C.

To evaluate the integral ∫(4r / √(14+2r^2)) dr, we can use the substitution method. Let's make the substitution u = 14 + 2r^2. To find the differential du, we take the derivative of u with respect to r: du = 4r dr. Rearranging this equation, we have dr = du / (4r).

Substituting the values into the integral, we get: ∫(4r / √(14+2r^2)) dr = ∫(du / √u).

Now, the integral becomes ∫(1 / √u) du. We can simplify this integral by using the power rule of integration, which states that the integral of x^n dx equals (x^(n+1) / (n+1)) + C, where C is the constant of integration.

Applying the power rule, we have: ∫(1 / √u) du = 2√u + C. Substituting the original variable back in, we have:2√(14+2r^2) + C. Therefore, the value of the integral ∫(4r / √(14+2r^2)) dr is 2√(14+2r^2) + C.

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Expand the given functions by the Laurent series a. f(z) = in the range of (a) 0 < 1z< 1; (b) 121 > 1 (10%) 23-24 b. f(z) = (z+1)(z-21) in the range of (a) [z + 11 > V5; (b) 0< Iz - 2il < 2

Answers

(a) f(z) = (z)/(1 - z) is function f(z) with pole of order 1 at z = 1 (b)  an = [tex]1/(2πi) ∮C 1/(z-1) (z-1)n dz[/tex], bn = [tex]1/(2πi) ∮C 1/z (z-1)n dz[/tex] for the laurent series.

Laurent series: Laurent series are expansions of functions in power series about singularities.

Functions: Functions are the rule or set of rules that one needs to follow to map each element of one set with another set. Expand the given functions by the Laurent series.

a. f(z) = in the range of (a) 0 < 1z< 1; (b) 121 > 1Solution: The given function is f(z) = and the range is given as (a) 0 < |z| < 1 and (b) 1 < |z| < 21. Consider range (a), we can rewrite the given function f(z) as below: f(z) = (z)/(1 - z)The given function f(z) has a pole of order 1 at z = 1.

Therefore, Laurent series of f(z) in the range (a) 0 < |z| < 1 is given as below: [tex]f(z) = ∞∑n=0zn = 1+z+z2+... . . . (1)[/tex]  Consider range (b), we can rewrite the given function f(z) as below:f(z) = (1/z) - (1/(z-1))The given function f(z) has a pole of order 1 at z = 0 and a pole of order 1 at z = 1.

Therefore, Laurent series of f(z) in the range (b) 1 < |z| < 21 is given as below: f(z) =[tex]∞∑n=1an(z-1)n + ∞∑n=0bn(z-1)n . .[/tex]. (2) We can find out the coefficients an and bn as below: [tex]an = 1/(2πi) ∮C 1/(z-1) (z-1)n dz bn = 1/(2πi) ∮C 1/z (z-1)n dz[/tex]where C is a closed contour inside the region 1 < |z| < 2.

So, the coefficients an and bn are given as below:[tex]an = 1/(2πi) ∮C 1/(z-1) (z-1)n dzan = (1/2πi) 2πi (1/(n-1)) = -1/(n-1)bn = 1/(2πi) ∮C 1/z (z-1)n dzbn = (1/2πi) 2πi = 1[/tex] Thus, the Laurent series of f(z) in the range (b) 1 < |z| < 21 is given as below:

[tex]f(z) = ∞∑n=1(-1/(n-1))(z-1)n + ∞∑n=0(z-1)n = -1 - (1/(z-1)) + z + z2 + ... . . . (3)[/tex] Therefore, the Laurent series of the given function is as follows:(a) In the range of 0 < |z| < 1: [tex]f(z) = ∞∑n=0zn = 1+z+z2+... . . . (1)[/tex] (b) In the range of 1 < |z| < 21: [tex]f(z) = ∞∑n=1(-1/(n-1))(z-1)n + ∞∑n=0(z-1)n = -1 - (1/(z-1)) + z + z2 + ... . . . (3)[/tex].

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Which of the following statement is true for the alternating series below? 2 Ž(-1)" 3" +3 n=1 Select one: Alternating Series test cannot be used, because bn = 3.73 2 is not decreasing. " Alternating Series test cannot be used, 2 because lim +0. 1- 3" + 3 The series converges by Alternating Series test. none of the others. O The series diverges by Alternating Series test

Answers

For the alternating series ((2 sum_n=1infty (-1)n (3n + 3)), the following statement is true: "The series converges by the Alternating Series test."

According to the Alternating Series test, if a series satisfies both of the following requirements: (1) the absolute value of the terms is dropping, and (2) the limit of the series as it approaches infinity is zero.

We have the sequence "a_n = 3n + 3" in the provided series. Even though the statement does not specify directly that the value of (|a_n|) is decreasing, we can see that as n increases, the terms (3n) grow larger and the value of (a_n) alternates in sign. This shows that the value of (|a_n|) is probably declining.

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18. Evaluate the integral (show clear work!): fxsin x dx

Answers

The integral of f(x) * sin(x) dx is -f(x) * cos(x) + integral of f'(x) * cos(x) dx + C, where C is the constant of integration.

To evaluate the integral of f(x) * sin(x) dx, we use integration by parts. The formula for integration by parts states that ∫ u dv = u v - ∫ v du, where u and v are functions of x.

Let's choose u = f(x) and dv = sin(x) dx. Taking the derivatives and antiderivatives, we have du = f'(x) dx and v = -cos(x).

∫ f(x) * sin(x) dx

Using integration by parts, let's choose u = f(x) and dv = sin(x) dx.

Differentiating u, we have du = f'(x) dx.

Integrating dv, we have v = -cos(x).

Applying the integration by parts formula:

∫ f(x) * sin(x) dx = -f(x) * cos(x) - ∫ (-cos(x)) * f'(x) dx

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(1 point) A cylinder is inscribed in a right circular cone of height 3 and radius (at the base) equal to 6.5. What are the dimensions of such a cylinder which has maximum volume? Radius= Height =

Answers

To find the dimensions of the cylinder that has the maximum volume when inscribed in a right circular cone, we can use optimization techniques.

Let's denote the radius of the cylinder as r and the height of the cylinder as h.

The volume V of the cylinder is given by V = πr²h. We need to maximize this volume subject to the constraint that the cylinder is inscribed in the cone.

From the given information, we know that the radius of the cone at the base is 6.5 and the height of the cone is 3. We can use similar triangles to relate the dimensions of the cone and the cylinder. The height of the cylinder will be a fraction of the height of the cone, and the radius of the cylinder will be a fraction of the radius of the cone.

Let's consider the similar triangles formed by the height and radius of the cone and the height and radius of the cylinder. The ratio of the height of the cylinder to the height of the cone is the same as the ratio of the radius of the cylinder to the radius of the cone.

h/3 = r/6.5

We can solve this equation for h in terms of r:

h = (3/6.5) * r

Substituting this expression for h in the volume equation, we have:

V = πr² * [(3/6.5) * r]

V = (3π/6.5) * r³

Now, we have the volume equation in terms of a single variable r. To find the maximum volume, we can take the derivative of V with respect to r, set it equal to zero, and solve for r:

dV/dr = (9π/6.5) * r² = 0

Solving for r, we get r = 0 (which is not a valid solution) or r² = 0.722

Taking the square root of both sides, we have r = √0.722 ≈ 0.85

Now, we can substitute this value of r back into the equation for h to find the corresponding height:

h = (3/6.5) * 0.85 ≈ 0.39

Therefore, the dimensions of the cylinder with maximum volume that is inscribed in the given cone are approximately radius = 0.85 and height = 0.39.

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If f (u, v) = 5u²v - 3uv³, find f (1, 2), fu (1, 2), and fv (1, 2). a) f (1, 2) b) fu (1, 2) c) fv (1, 2) 4

Answers

For the function f(u, v) = 5u²v - 3uv³, the value of f(1, 2) is 4. The partial derivative fu(1, 2) is 10v - 6uv² evaluated at (1, 2), resulting in 14. The partial derivative fv(1, 2) is 5u² - 9uv² evaluated at (1, 2), resulting in -13.

To find f(1, 2), we substitute u = 1 and v = 2 into the function f(u, v). Plugging in these values, we get f(1, 2) = 5(1)²(2) - 3(1)(2)³ = 10 - 48 = -38.

To find the partial derivative fu, we differentiate the function f(u, v) with respect to u while treating v as a constant. Taking the derivative, we get fu = 10uv - 6uv². Evaluating this expression at (1, 2), we have fu(1, 2) = 10(2) - 6(1)(2)² = 20 - 24 = -4.

To find the partial derivative fv, we differentiate the function f(u, v) with respect to v while treating u as a constant. Taking the derivative, we get fv = 5u² - 9u²v². Evaluating this expression at (1, 2), we have fv(1, 2) = 5(1)² - 9(1)²(2)² = 5 - 36 = -31.

Therefore, the values are:

a) f(1, 2) = -38

b) fu(1, 2) = -4

c) fv(1, 2) = -31

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Find the upper sum for the region bounded by the graphs of f(x) = x² and the x-axis between x = 0 and x = 2.

Answers

To find the upper sum for the region bounded by the graph of f(x) = x² and the x-axis between x = 0 and x = 2, we divide the interval [0, 2] into smaller subintervals and approximate the area under the curve by using the maximum value of f(x) within each subinterval as the height of a rectangle. The upper sum is obtained by summing up the areas of all the rectangles.

We divide the interval [0, 2] into n subintervals of equal width, where n determines the number of rectangles used in the approximation. The width of each subinterval is given by (b - a)/n, where a and b are the endpoints of the interval.

In this case, the interval is [0, 2], so the width of each subinterval is (2 - 0)/n = 2/n.

To find the upper sum, we evaluate the function f(x) = x² at the right endpoint of each subinterval and use the maximum value as the height of the rectangle within that subinterval. Since f(x) = x² is an increasing function in the interval [0, 2], the maximum value of f(x) within each subinterval occurs at the right endpoint.

The upper sum is then obtained by summing up the areas of all the rectangles:

Upper Sum = Area of Rectangle 1 + Area of Rectangle 2 + ... + Area of Rectangle n

The area of each rectangle is given by the width times the height:

Area of Rectangle = (2/n) * f(right endpoint)

After evaluating f(x) at the respective right endpoints and performing the calculations, we can simplify the expression and obtain the upper sum for the region bounded by the graph of f(x) = x² and the x-axis between x = 0 and x = 2.

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Solve the boundary-value problem y'' – 8y' + 16y=0, y(0) = 2, y(1) = 0.

Answers

The solution for the boundary-value problem is y(x) = 2[tex]e^{(4x)}[/tex] × (1 - x).

How do we solve the boundary-value problem?

The given differential equation y'' – 8y' + 16y = 0 is a second-order homogeneous linear differential equation with constant coefficients.

The characteristic equation of this differential equation⇒r² - 8r + 16 = 0

This can be factored as (r - 4)² = 0 ∴⇒r = 4.

general solution ⇒ y(x) = (A(x) + B) × [tex]e^{(4x)}[/tex]

A and B are constants.

Now, we'll use the boundary conditions y(0) = 2 and y(1) = 0 to solve for A and B.

For the first boundary condition y(0) = 2:

2 = (A0 + B)× [tex]e^{(4*0)}[/tex]

2 = B

Substitute B = 2 into general solution:

y(x) = Ax × [tex]e^{(4x)}[/tex] + 2 × [tex]e^{(4x)}[/tex]

y(x) = [tex]e^{(4x)}[/tex] × (Ax + 2)

For the second boundary condition y(1) = 0:

0 =  [tex]e^{(4*1)}[/tex] × (A1 + 2)

0 = e⁴ × (A + 2)

As  e⁴ ≠ 0, we can solve for A:

A = -2

So the solution to the boundary value problem is:

y(x) =  [tex]e^{(4x)}[/tex]  × (-2x + 2) ⇒ y(x) = 2 [tex]e^{(4x)}[/tex] × (1 - x)

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there are 6 different types of tasks in a department. in how many possible ways can 6 workers pick up the 6 tasks?

Answers

There are 720 possible ways for the six workers to pick up the six tasks.

If there are six different types of tasks in a department and six workers to pick up these tasks, we can calculate the number of possible ways using the concept of permutations.

Since each worker can pick up one task, we need to calculate the number of permutations of 6 tasks taken by 6 workers.

The formula for permutations is:

P(n, r) = n! / (n - r)!

where n is the total number of items and r is the number of items taken at a time.

In this case, n = 6 (number of tasks) and r = 6 (number of workers). Substituting the values into the formula, we get:

P(6, 6) = 6! / (6 - 6)!

= 6! / 0!

= 6! / 1

= 6 x 5 x 4 x 3 x 2 x 1

= 720

Therefore, there are 720 possible ways for the six workers to pick up the six tasks.

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The slope is 12, which means that the student will finish raising money after 12 hours. The slope is 20, which means that the student started with $20. The slope is one eighth, which means that the amount the student raised increases by $0.26 each hour. The slope is 8, which means that the amount the student raised increases by $8 each hour. jannat is purchasing a house today for $172,800, and expects to resell it in one year for $197,100. using a discount rate of 6.75 percent, what is the expected net present value? multiple choice $11,469.68 $11,837.00 $20,305.04 $19,310.50 $18,463.70 the owner's title insurance policy is issued for an amount no greater than the purchase price and is not transferable.b)the loan balance and is not transferable.c)an amount no greater than the purchase price and is transferable.d)the loan balance and is transferable. Write the equation of the line, in slope-intercept form, with thefollowing information:rate of change: undefinedpoint: (-3,2) What natural factor removes suspended particulate matter from the troposphere?A. The carbon cycleB. evaporationC. Temperature inversionsD. gravityE. Filtration Hot-spots can a.Rise up from the ocean floor b.Be found on continents c.Be found in the interior of tectonic plates d. All of the above what is the operational definition for the rate of transpiration Use the Error Bound to find the least possible value of N for which Error(SN)1109in approximating106ex2dxusing the result thatError(SN)K4(ba)5180N4,where K4 is the least upper bound for all absolute values of the fourth derivatives of the function 6ex2 on the interval [a,b]N= (A) An nxn matrix B is a square root of a matrix A i B- A. Show that the 2x2 Identity matrix I = 60 g has an infinite number of real square roots. Roll two dice. What is the probability of getting a five or higher on the first roll and getting a total of 7 on the two dice?A) 1/36B) 1/6C) 1/4D) 1/3 suppose that, at some instant, the partial pressure of oxygen in blood near the tissues is about 70 mmhg. what can you conclude is happening to the blood? would the partial pressure of carbon dioxide most likely be 35 mmhg, 43 mmhg, or 49 mmhg?