sara draws the 8 8 of hearts from a standard deck of 52 cards. without replacing the first card, she then proceeds to draw a second card. a. determine the probability that the second card is another 8 8 .

This problem can be solved using the binomial distribution, where the probability of success is $p=\frac{1}{5}$ and the number of trials is $n=7$.

The probability of exactly $k$ successes in $n$ trials is given by the formula:

$P(X=k) = \binom{n}{k} p^k (1-p)^{n-k}$

where $\binom{n}{k}$ is the binomial coefficient.

For this problem, we want to find $P(X=4)$, which is:

$P(X=4) = \binom{7}{4} \left(\frac{1}{5}\right)^4 \left(\frac{4}{5}\right)^3$

Evaluating this expression, we get:

$P(X=4) = \frac{35}{78125} \approx 0.000448$

Therefore, the probability that exactly 4 of the 7 islands have treasure is approximately 0.000448, or about 0.045%.

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Answer: c

Step-by-step explanation:

a. To find the equation for the surface area of the rectangular box with a square base of side x and height y, you need to consider all the faces of the box. The box has two square faces with side x, and four rectangular faces with dimensions x and y.

Explanation:

The equation for the surface area S(x,y) can be calculated as follows:

S(x,y) = 2 * (area of square face) + 4 * (area of rectangular face)
S(x,y) = 2 * (x^2) + 4 * (x * y)

b. Given that the surface area of the rectangular box is 138 square feet, we can set up an equation using S(x,y) from part (a) and the given values of x = 3 feet and y = 10 feet:

138 = 2 * (3^2) + 4 * (3 * 10)

Now, we need to find the derivative of the surface area equation with respect to x (dS/dx) and y (dS/dy):

dS/dx = 4x + 4y
dS/dy = 4x

We can now plug in the given values for x and y to find dS/dx and dS/dy:

dS/dx = 4(3) + 4(10) = 12 + 40 = 52
dS/dy = 4(3) = 12

So, when x = 3 feet and y = 10 feet, dS/dx = 52 and dS/dy = 12.

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Kim needs a total area of 225.92 square inches of construction paper for her project.

To find the total square inches of construction paper that Kim needs for her project, we need to calculate the area of each rectangle and then add them together.

For the first rectangle that is 9 inches × 13 1/3 inches, we can calculate its area as follows:

Area = Length × Width = 9 in × 13 1/3 in

To multiply 13 1/3 by 9, we can convert 13 1/3 to a fraction and multiply:

13 1/3 = 40/3, so:

Area = 9 in × (40/3) in = 360/3 in^2 = 120 in^2

For the second rectangle that is 10 1/4 inches by 10 1/3 inches, we can calculate its area as follows:

Area = Length × Width = (10 1/4 in) × (10 1/3 in)

To multiply 10 1/4 by 10 1/3, we can convert both numbers to fractions and multiply:

10 1/4 = 41/4 and 10 1/3 = 31/3, so:

Area = (41/4 in) × (31/3 in) = 1271/12 in^2 ≈ 105.92 in^2

Now, we can add the two areas to find the total area of construction paper that Kim needs:

Total area = 120 in^2 + 105.92 in^2 = 225.92 in^2

Therefore, Kim needs a total of 225.92 square inches.

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Answer:

Step-by-step explanation:

To solve this question, we can use the formula for compound interest:

A = P(1 + r/n)^(nt)

Where:

A is the total amount of money after t years

P is the initial principal (in this case, $600)

r is the annual interest rate (4%)

n is the number of times the interest is compounded per year (12, for monthly compounding)

t is the number of years

Plugging in the values, we get:

A = 600(1 + 0.04/12)^(12*14)

A = 600(1.00333)^168

A = $988.42 (rounded to two decimal places)

So, after 14 years, Levi will have approximately $988.42 in his account.

Therefore, the cylinders arranged in order from least volume to greatest volume are:

Cylinder with diameter 28 units and height 18 units

Cylinder with radius 13 units and height 17 units

Cylinder with radius 12 units and height 20 units

Cylinder with diameter 30 units and height 14 units

Volume is the measure of the amount of space occupied by a three-dimensional object. It is typically measured in cubic units, such as cubic meters or cubic feet. The formula for finding the volume of a solid depends on the shape of the object. For example, the volume of a cube can be found by multiplying the length, width, and height of the cube, while the volume of a sphere can be found using the formula (4/3)πr³, where r is the radius of the sphere.

Here,

To compare the volumes of the given cylinders, we need to use the formula for the volume of a cylinder, which is V = πr²h, where r is the radius of the circular base and h is the height of the cylinder. Let's calculate the volumes of the given cylinders:

Cylinder with diameter 28 units and height 18 units:

radius = 14 units

volume = π(14²)(18)

= 8,365.98 cubic units

Cylinder with radius 13 units and height 17 units:

volume = π(13²)(17)

= 8,724.68 cubic units

Cylinder with diameter 30 units and height 14 units:

radius = 15 units

volume = π(15²)(14)

= 9,420.98 cubic units

Cylinder with radius 12 units and height 20 units:

volume = π(12²)(20)

= 9,014.47 cubic units

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The Answer of the given question based on the triangle is angle ∠α ≈ 56.4° degrees , angle ∠β ≈ 33.6° degrees , side C ≈ 14.4° units.

In a right triangle, the hypotenuse is the longest side and it is opposite the right angle. It is the side that is directly opposite the right angle and is always opposite the largest angle of the triangle. The hypotenuse is also the side that connects the two legs of the right triangle. The length of hypotenuse can be found using Pythagorean theorem.

From the problem statement, we know that angle ∠gamma = 90° degrees, which means that BC is the hypotenuse of the right triangle. We also know that side A = 12 and side B = 8.

Using Pythagorean Theorem, we can find length of  hypotenuse by:

c² = a² + b²

c² = 12² + 8²

c² = 144 + 64

c² = 208

c = √(208)

c ≈ 14.4

So the length of BC is approximately 14.4 units.

To find the altitude CA, we can use the formula for the area of a right triangle:

area = (1/2) * base * height

Since angle gamma = 90° degrees, the altitude CA is equal to the length of side A:

CA = A = 12 units.

Now we can use the trigonometric ratios to find the acute angles∠α and :

sin(α) = opposite/hypotenuse = CA/c

sin(α) = 12/14.4

α ≈ 56.4° degrees

Since α and gamma are complementary angles (they add up to 90° degrees), we can find β using the following formula:

β = 90 - α

β ≈ 33.6° degrees

Therefore, the unknown values for the given right triangle are:

angle ∠α ≈ 56.4° degrees

angle ∠β ≈ 33.6° degrees

side C ≈ 14.4° units.

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Answer:

búscalos

Step-by-step explanation:

Answer:

7/15

Step-by-step explanation:

2/5 can be converted into 6/15 by multiplying the numerator and denominator by 3. The next number between 6 and 8 is 7, so the answer is 7/15.

The function has an inverse that is also a function is g(x)=2x-3

A function that can turn into another function is known as an inverse function or anti function. In other terms, the inverse of a function "f" will take y to x if any function "f" takes x to y. The inverse function is designated by f⁻¹ or F⁻¹ if the function is written by f or F. Here, (-1) should not be confused with an exponent or an inverse.

A function takes in values, applies specific procedures to them, and produces an output. The inverse function works, agrees with the outcome, and returns to the initial function.

The solution in which x and y have been reversed is known as an inverse function.

The vertical line test determines whether a function succeeds or fails when you solve for y once more.

1. Here g(x) = 2x - 3 has inverse x = 2y - 3 which simplifies to;

[tex]y=\frac{x-3}{2}[/tex]

This is a line and is a function;

[tex]y=\frac{x}{2} +\frac{1}{2}[/tex]

2. k(x) = -9x² has the inverse x = -9y² which simplifies to;

[tex]y=\sqrt{x/(-9)}[/tex]

This is a function but only for certain values of x.

3. f(x) = |x+2| is an absolute value function.

Not all absolute value functions have function-based inverses.

4. A function's inverse does not exist for the equation w(x) = -20.

The function therefore has a negative that is also a function, which is

g(x)= 2x – 3.

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The answer is option A, pet ownership is the independent variable.

In experimental research, an independent variable is the variable that is manipulated by the researcher to determine its effect on the dependent variable. In this case, the independent variable is pet ownership, which is being studied to determine its effect on the health and lifespan of pet owners.

The dependent variable, in turn, is the health and lifespan of pet owners, which is expected to be influenced by their pet ownership status.

It is important to note that the relationship between pet ownership and health/lifespan could be influenced by other factors, such as age, income, or lifestyle. These other factors are known as spurious variables and can confound the relationship between the independent and dependent variables.

Operational variables, on the other hand, refer to how the researcher measures or manipulates the independent and dependent variables.

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Answer:

In this problem, we have a right triangle where the hypotenuse is the 30-foot support cable and one leg is 22 feet (the distance from the base of the pole to where the cable is attached). To find the angle that the cable makes with the ground, we need to use trigonometry. The tangent of an angle in a right triangle is equal to the length of the opposite side divided by the length of the adjacent side. In this case, we want to find tan(θ), where θ is the angle between the cable and the ground. Therefore, tan(θ) = opposite/adjacent = 22/30 = 0.7333. Taking inverse tangent on both sides gives us θ = tan^-1(0.7333) ≈ 36.7 degrees to one decimal place. Therefore, to the nearest tenth, the measure of the angle that the cable makes with the ground is approximately 36.7 degrees.

The domain and range of the function is (-∞, ∞),  (-∞, 18]

A function is a rule that gives each element from the domain set to a single element from the range set. The range is the set of values that the function can take, whereas the domain is the set of values for which the function is defined.

Consider the function f(x) = x^2, for instance. As the function may be defined for any value of x, the domain of this function includes all real numbers. Nevertheless, as the function may only accept values larger than or equal to zero, the range is limited to non-negative real numbers.

a. The domain and range of the function f(x) = -2x² + 8x + 10 are;

domain = (-∞, ∞)

range = (-∞, 18]

b. The domain and range of the function is;

domain = [0, 12]

range = [0, 18]

c. The domain and range of the function are;

domain = (-∞, ∞)

range = [-7, ∞)

d. The domain and range of the function are;

domain = (-∞, ∞)

range = [1, ∞)

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Answer:

Sam made 21 shots, and Wil made 27 shots.

The dimensions of the worksheet are 15 inches by 9 inches.

According to the question a worksheet has a perimeter of 48 inches and an area of 135 square inches. The dimensions of the worksheet are to be found.To find the dimensions of the worksheet we have to follow the steps given below:

Step 1: Let’s assume the dimensions of the worksheet are L and B.

Step 2: Calculate the perimeter of the worksheet which is the sum of all the sides of the worksheet.Perimeter of a worksheet= 2(L + B) = 48 inches⇒ L + B = 24

Step 3: Calculate the area of the worksheet which is the product of the length and breadth of the worksheet.Area of the worksheet = L × B = 135 square inches.

Step 4: Find the values of L and B by solving the equations L + B = 24 and L × B = 135 by substitution.The value of B can be found by substituting L = 24 - B. in the second equation.L × B = 135(24 - B) × B = 13524B - B² = 135B² - 24B + 135 = 0B = (24 ± √(24² - 4 × 135)) / 2 = 9 or 15(As the dimensions can’t be negative, we choose B = 9)When B = 9L = 24 - 9 = 15.

Thus, the dimensions of the worksheet are L = 15 inches and B = 9 inches.In other words, the dimensions of the worksheet are 15 inches by 9 inches.

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The average angular velocity during the dive is option b, 3 π/ √2=rad/s.

The height of the platform, h = 10 m

The number of revolutions made by the diver = 2.5 revolutions = 5π radThe initial velocity of the diver = 0

The final velocity of the diver:

We know,

The formula for final velocity in terms of initial velocity, acceleration, and distance is given as;

v² = u² + 2

Here, Initial velocity, u = 0

Final velocity, v =

Acceleration due to gravity, a = 9.8 m/s²

Distance, s = h = 10 m

Therefore, v² = 0 + 2 × 9.8 × 10v²

   = 196v = √196v = 14.00 m/s

We know, the formula for average angular velocity is given as;

ω = θ/t

Here, angular displacement, θ = 5π rad

Time taken, t

We know, the formula for time taken is given as;

t = √2h/g

Here, height of the platform, h = 10 m

Acceleration due to gravity, g = 9.8 m/s²

Therefore,t = √2 × 10/9.8t = 1.427 s

Substituting the values of θ and t in the formula for average angular velocity, we get;

ω = θ/tω = 5π/1.427ω = 3.5 π/ √2rad/s

Therefore, the average angular velocity during the dive is option b, 3 π/ √2=rad/s.

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Answer:

We can start by using algebra to solve for the total goal of the canned food drive. Let's let "g" be the total goal in number of cans.

If 600 cans is 80% of their goal, then we can write:

0.8g = 600

To solve for "g", we can divide both sides by 0.8:

g = 600 / 0.8

g = 750

So the total goal of the canned food drive is 750 cans.

To find out how many more cans the students need to collect to reach their goal, we can subtract the number of cans they've already collected from the total goal:

750 - 600 = 150

Therefore, the students need to collect 150 more cans to reach their goal.

As per the confidence interval, the population variance is between 67.9 and 186.6 and the population standard deviation is between 8.24 and 13.67 inches.

To construct a 95% confidence interval for the population variance, we use the chi-squared distribution. The formula for the confidence interval is:

[ (n-1) x s² / chi-squared(α/2, n-1), (n-1)*s² / chi-squared(1 - α/2, n-1) ]

where n is the sample size, s is the sample standard deviation, alpha is the level of significance (in this case, alpha = 0.05), and chi-squared(alpha/2, n-1) and chi-squared(1-alpha/2, n-1) are the values from the chi-squared distribution that correspond to the upper and lower limits of the confidence interval.

Plugging in the numbers, we get:

[ (298.18²) / chi-squared(0.025, 29), (298.18²) / chi-squared(0.975, 29) ]

Using a chi-squared distribution, we find that chi-squared(0.025, 29) = 16.05 and chi-squared(0.975, 29) = 44.07. Therefore, the confidence interval for the population variance is:

[ 2994.6 / 44.07, 2994.6 / 16.05 ] = [ 67.9, 186.6 ]

To construct a 95% confidence interval for the population standard deviation, we take the square root of both ends of the interval for the population variance. Therefore, the confidence interval for the population standard deviation is:

[ √(67.9), √(186.6) ] = [ 8.24, 13.67 ]

Interpreting the results, we can say that we are 95% confident that the true population variance of annual precipitations in San Francisco falls between 67.9 and 186.6 square inches. Similarly, we are 95% confident that the true population standard deviation falls between 8.24 and 13.67 inches.

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The probability of class failure is 7%. If 56 students take a class, the expected number of students who will fail the class is 4.

We will use the above formula to find the expected value of class failure. Let x be the number of students expected to fail the class.

Expected value = Probability x Total number of trials

The probability of class failure is 7%, so the probability of passing the class is 100% - 7% = 93%. The total number of trials is the total number of students taking the class, which is 56. Putting these values into the formula gives us:

Expected value = 7% x 56
Expected value = 0.07 x 56
Expected value = 3.92

We cannot have a fraction of a student, so we can round this number up to get the expected number of students who will fail the class.

Therefore, the expected number of students who will fail the class is 4.

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you estimate that your UA climbed to an altitude greater than 400 feet above ground level (AGL), you must submit a written report of the deviation to the Federal Aviation Administration (FAA).

If you are operating a small unmanned aircraft (UA) and have had a near mid-air collision (NMAC) with a manned airplane, and you estimate that your UA climbed to an altitude greater than 400 feet above ground level (AGL), you must submit a written report of the deviation to the Federal Aviation Administration (FAA).

According to the FAA regulations, any UAS operator involved in an NMAC with a manned aircraft must submit a report to the FAA within ten days of the incident. This report must include the date, time, and location of the incident, as well as a detailed description of the events leading up to the NMAC.

You can submit the report online via the FAA's Aviation Safety Reporting System (ASRS) website. The ASRS is a voluntary reporting system that allows pilots and UAS operators to report incidents without fear of enforcement action, provided that the incident was not a result of reckless or intentional behavior.

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The probability of being male and passing the test is 0.4.

The probability of being male and passing the test can be calculated using the formula for independent events: P(A and B) = P(A) × P(B).

In this case, A represents being male (P(A) = 0.5), and B represents passing the test (P(B) = 0.8).
Step 1: Identify the probabilities of the independent events.
P(A) = 0.5 (being male)
P(B) = 0.8 (passing the test)
Step 2: Apply the formula for independent events.
P(A and B) = P(A) × P(B)
P(being male and passing the test) = P(being male) × P(passing the test)
Step 3: Calculate the probability.
P(being male and passing the test) = 0.5 × 0.8 = 0.4
So, the probability of being male and passing the test is 0.4.

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As a result, we are unable to determine the age of a child who is 133 cm tall using the regression equation.

A statistical technique called linear regression is used to represent the connection between two variables, where one of the variables is the dependent variable and the other is the independent variable. Finding the best-fit line that depicts the connection between the two variables is the objective of linear regression. This enables us to make predictions or estimate values based on the known data.

given

These numbers allow us to determine a and b:

a = 0.997 (9.285 / 1.547) ≈ 5.977

b = 128.2 - 5.977 (8.02) ≈ 81.704

The regression equation is therefore y = 5.977 x + 81.704.

(ii) Based on the calculations made above, the Pearson's product-moment correlation coefficient, or r, has a value of roughly 0.997.

(b) We enter x = 9 into the regression equation to calculate an approximation of the height of a 9-year-old child:

As a result, we calculate that a 9-year-old kid will be roughly 134.6 cm tall.

We must resolve the regression equation for x in order to determine the age of a kid who measures 133 cm in height.

x = (y - b) / a

This calculation, though, would result in an illogically negative age. As a result, we are unable to determine the age of a child who is 133 cm tall using the regression equation.

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The complete question is:-  

The following table shows the mean height, y cm, of primary school children who are age x years old.

Age, x years Mean Height, y cm

6.25 7.35 8.5 9.25 10.75

115 121 129 136 140

The relationship between x and y can be modelled by the regression line of y on x with equation y = ax + b.

(a) (i) Find the value of a and the value of b.

(ii) Write down the value of Pearson's product-moment correlation coefficient, r.

(b) Use your regression equation from part (a)(i) to estimate the height of a child aged 9 years old.

(c) Explain why it is not appropriate to use the regression equation to estimate the age of a child who is 133 cm tall.

The college instructor is most concerned with equity standards.

Equity standards are when an instructor adjusts grades to ensure fairness to all students regardless of their individual performances.

This means that if a class as a whole does not do as well as last year, the instructor will alter the distribution of grades so that the overall grades reflect the effort put in by the class.

For example, if the class average is a C, the instructor may raise some grades to a B or even A in order to ensure that the grades are fair to all students in the class.

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Answer:

Step-by-step explanation: If Nina fills 10 bags, each with 3 treats, she would have a total of 30 treats (10 bags x 3 treats per bag). If she fills 20 bags, she would have 60 treats (20 bags x 3 treats per bag). If she fills 30 bags, she would have 90 treats (30 bags x 3 treats per bag). Since she only has 78 treats, she can fill between 10 and 20 bags, but not more than 20 bags.

If she fills 10 bags, she would use 30 treats, leaving her with 48 treats. If she fills 11 bags, she would use 33 treats, leaving her with 45 treats, which is not enough to fill another bag. Therefore, she can fill fewer than 11 bags, but not more than 20 bags.

Answer:

The slope of the line passing through the points (-6,-5) and (-1,1) can be found using the formula:

slope = (y2 - y1) / (x2 - x1)

where (x1, y1) = (-6,-5) and (x2, y2) = (-1,1)

slope = (1 - (-5)) / (-1 - (-6)) = 6/5

Now, using point-slope form of the equation of a line, we get:

y - y1 = m(x - x1)

where m = 6/5 and (x1, y1) = (-6,-5)

y + 5 = 6/5(x + 6)

y + 5 = 6/5x + 6.72

y = 6/5x + 6.72 - 5

y = 6/5x + 1.72

Therefore, the equation of the line passing through the points (-6,-5) and (-1,1) is:

y = 6/5x + 1.72

Option (c) y=6/5x is not the correct equation of the line. The correct answer is (d) y=6/5x + 11/6.

Answer:

x > -1

Step-by-step explanation:

8x - 4 > 3x - 9

5x - 4 > -9

5x > -5

x > -1

The value 3.915 represents the y-intercept or the initial or baseline water lily population when there are no changes in the independent variable (x). the coefficient 1.106 represents the slope of the regression line or the rate of change in the dependent variable (y).

In the regression equation y = 3.915(1.106)x, the coefficient 3.915 represents the y-intercept or the value of y when x is 0. In the context of the water lily population change, this means that when there are no changes in the independent variable (x), the predicted value of the dependent variable (y) is 3.915, which represents the initial or baseline water lily population.

The coefficient 1.106 represents  rate of change in the dependent variable (y) per unit change in the independent variable (x) or the  the slope of regression line . In the context of the water lily population change, this means that for every unit increase in the independent variable (which could be time, environmental factors, or any other relevant variable), the predicted value of the dependent variable (y) increases by a factor of 1.106. In other words, the water lily population is expected to grow by 1.106 times for every unit increase in the relevant variable.

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____The given question is incomplete, the complete question is given below:

The regression equation you found for the water lilies is y = 3.915(1.106)x.

In terms of the water lily population change, the value 3.915 represents:

The value 1.106 represents:

Answer:

The value of 3.915 is the initial number

of water lilies. It is approximately 4, which matches

the data.

The value 1.106 is the growth rate. The rate represents growth for each day. The percentage growth each day is 10.6%

Step-by-step explanation:

From the given information provided, m is multiplied by 6m-7 so that the product is 6m²-7m.

To find what is multiplied by 6m-7 so that the product is 6m²-7m, we can use polynomial long division or factorization. Here's how to do it using factorization:

We need to find two numbers that multiply to give 6m²-7m and add up to -7. We can factor the expression 6m²-7m as:

6m² - 7m = m(6m - 7)

So, we see that 6m-7 is a factor of 6m²-7m. Therefore, to find what is multiplied by 6m-7 to get 6m²-7m, we just need to divide 6m²-7m by 6m-7:

(6m² - 7m) / (6m - 7) = m

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In response to stated question, we may state that You will need to stitch about 5.0089 metres of piping around the outside border of the area tablecloth, rounded to the closest 0.1 m, for a total length of 5.0 m.

The size of just an area on either a surface can be represented as an area. The area of an open surface or the border of a two half object is called to as the surface area, meanwhile the area of a horizontal region or planar region pertains to the area of a shape or planar layer. The entire amount of space occupied by a horizontal (2-D) surface or form of an item is referred as its area. With a pencil, draw an square on a sheet of paper. A two-dimensional character. The area of a form on paper is the quantity of area it takes up. Consider the square to be made up of smaller unit squares.

Begin by calculating the radius of the circular tablecloth. We know that the formula A = r2 gives the area of a circle, where A is the area and r is the radius. Hence we may rearrange this formula to find r:

r = √(A/π) = √(2/π) ≈ 0.7979 m (rounded to four decimal places) (rounded to four decimal places)

Now we must determine the circumference of the circle, which is the distance around the tablecloth's outside border. The circumference is calculated using the formula C = 2r.

C = 2π(0.7979) ≈ 5.0089 m

You will need to stitch about 5.0089 metres of piping around the outside border of the tablecloth, rounded to the closest 0.1 m, for a total length of 5.0 m.

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Answer:

Step-by-step explanation:

Answer:4/3

Answer:

The tangent of the larger acute angle in a right triangle with side lengths 10, 24, and 26 is 12/5.

Step-by-step explanation:

In a right triangle, the hypotenuse (the side opposite the right angle) is the longest side.

Therefore, in a right triangle with side lengths 10, 24, and 26, the hypotenuse measures 26 units and the legs measure 10 and 24 units.

In a right triangle:

Therefore, the largest acute angle is between the hypotenuse and the shortest leg, which means the side opposite the angle is the longest leg.

The tangent ratio is the ratio of the side opposite the angle to the side adjacent the angle.

Therefore the tangent of the largest acute angle is:

[tex]\implies \sf \dfrac{O}{A}=\dfrac{24}{10}=\dfrac{12}{5}[/tex]

Answer:

Step-by-step explanation:

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