Therefore, it will take about 46.5 minutes for the culture to achieve 10,000 bacteria.
What is expression?In mathematics, an expression is a combination of numbers, symbols, and operators (such as +, -, x, ÷, etc.) that represents a mathematical quantity or relationship. Expressions can be as simple as a single number or variable, or they can be complex and involve multiple terms and operations. Examples of expressions include 2x + 5, 3y - 7, and (a + b)(c - d).
Here,
We can set up an equation to solve for t:
B(t) = 100 ·[tex]2^{t/20}[/tex]
= 10,000
Dividing both sides by 100, we get:
[tex]2^{t/20}[/tex] = 100
Taking the logarithm of both sides with base 2, we get:
t/20 = log2(100)
t = 20 · log2(100)
Using a calculator, we can simplify this to:
t ≈ 46.5 minutes
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please help me!
Mark reads 42 pages of a book every 3/4 hour. Write an equation that models the relationship between x, the number of hours Mark reads, and y, the number of pages of the book he reads.
The linear equation that models the number of pages that he reads is:
y = 56*x
How to write the equation?So we know that Mark reads 42 pages every 3/4 of an hour, and we want to write an equation that models the number of pages y that mark reads in x hours, to do so we needto get the unit rate.
Take the quotient between the number of pages and the time above to get:
u = (42 pages)/(3/4 hours) = 56 pages per hour.
Then the number of pages that he can read in x hours is modeled by the linear equation:
y = 56*x
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A circular flower bed is 20 m in diameter and has a circular sidewalk around it that is 2m wide. Find the area of the sidewalk in square meters. Use 3.14 for
According to the solving the area of the sidewalk is 138.16 square meters.
What is an area?Size of a location on a surface is expressed in terms of area. As opposed to surface area, which refers to the area of an open surface or the border of a three-dimensional object, plane region or plane size refers to the area of a shape or planar lamina.
According to the given information:The width of the circular sidewalk is 2 m, which means that the radius of the entire area, including the flower bed and the sidewalk, is 10 m + 2 m = 12 m.
To find the area of the sidewalk, we need to subtract the area of the flower bed from the area of the larger circle.
Area of larger circle = πr²
= 3.14 x 12²
= 452.16 square meters (rounded to two decimal places)
Area of flower bed = πr²
= 3.14 x 10²
= 314 square meters
Area of the sidewalk = Area of larger circle - Area of flower bed
= 452.16 - 314
= 138.16 square meters (rounded to two decimal places)
Therefore, the area of the sidewalk is 138.16 square meters.
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If the circumference of a circle is 88 cm, find its area.
Answer:
24328.49 cm
Step-by-step explanation:
as (A = π r²). r is 88 so and is 24328.49cm
convert 2/5 to a fraction and decimal
To convert 2/5 to a fraction, it is already a fraction in its simplified form, so we can leave it as is.
To convert 2/5 to a decimal, we can divide the numerator (2) by the denominator (5):
2 ÷ 5 = 0.4
Therefore, 2/5 is equivalent to the fraction 2/5 and the decimal 0.4.
Divide the rectangle into 2 equal parts.
ng Out
Write an equation that represents this.
(# of Pieces I started with) = (how many equal parts)
÷
The equation that represents dividing the rectangle into two equal parts is:
W * L/4 = A/2
How to explain the equationAssuming that we want to divide the rectangle into two equal parts by a straight line passing through its center, we can represent the rectangle's dimensions as follows:
Let L be the length of the rectangle, and let W be its width. Then the area of the rectangle is A = L * W.
Therefore, to divide the rectangle into two equal parts, we need to draw a line that passes through the center of the rectangle and divides it into two parts with equal areas.
Let x be the distance of the dividing line from one of the shorter sides of the rectangle. Then, the length of the two parts of the rectangle is equal, which means:
L/2 - x = x
Solving for x, we get:
x = L/4
Therefore, the equation that represents dividing the rectangle into two equal parts is: W * L/4 = A/2
This equation says that if we take the width of the rectangle and multiply it by one-fourth of its length, we get half of the rectangle's area, which represents dividing it into two equal parts.
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A local doctor wants to test the effects of a new diet she decided to lower triglycerides on 10 randomly selected patients. The triglyceride level of each patient is checked twice, once before they start the diet, and again at three weeks after that time. The results are in the table below, (the photo). All data is in milligrams per deciliter (mg/dL).
The Noel and alternative hypothesis for the study are (in the photo)
Please let me know which one of the answers in the photo is correct ! Thank you , 100 points!!
With a significance level of 0.05, the. option that shows the correct test statistic, P- value, and conclusion is A. Test statistic, -1.952; P-value, 0.0414. There is sufficient evidence to reject the null hypothesis of no difference between the triglyceride test levels.
What is a significance level?In statistics, the significance level (denoted by α) is the probability of making a Type I error, which is rejecting a true null hypothesis. In other words, it is the maximum allowable probability of observing a result as extreme as or more extreme than the one observed, assuming the null hypothesis is true.
The significance level is typically set by the researcher before conducting a hypothesis test and is usually set to 0.05 (5%) or 0.01 (1%). If the p-value of the test is less than or equal to the significance level, the null hypothesis is rejected in favor of the alternative hypothesis. If the p-value is greater than the significance level, the null hypothesis is not rejected.
The correct option is A.
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With a significance level of 0.05, which of the following shows the correct test statistic, P- value, and conclusion?
Test statistic, -1.952; P-value, 0.0414. There is sufficient evidence to reject the null hypothesis of no difference between the triglyceride test levels.
Test statistic, = 0.3619; P-value, 0.6392. There is insufficient evidence to reject the null hypothesis of no difference between the triglyceride test levels.
Test statistic, -1.952; P-value, 0.0509. There is sufficient evidence to reject the null hypothesis of no difference between the triglyceride test levels.
Test statistic, t=0.3651; P-value, 0.6425. There is insufficient evidence to reject the null hypothesis of
no difference between the triglyceride test levels.
Which point on the graph tells you the amount of sugar you'll
use if you don't make any pies?
Total Cups of Sugar
The point on the graph that tells you the amount of sugar you'll use if you don't make any pies is (0, 0).
What is a proportional relationship?In Mathematics, a proportional relationship is a type of relationship that produces equivalent ratios and it can be modeled or represented by the following mathematical expression:
y = kx
Where:
y represent the amount of sugar.x represent the number of pies.k is the constant of proportionality.In order to have a proportional relationship, the variables representing the amount of sugar and time must have the same constant of proportionality:
Constant of proportionality, k = y/x
Constant of proportionality, k = 4/3
Constant of proportionality, k = 12.
Therefore, the required equation is given by:
y = kx
y = 4x/3
When x = 0, the value of y is given by:
y = 4(0)/3
y = 0 pies.
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If the light is coming from the same position, the length of a person's shadow is proportional to their height. Adam and Cara are standing side-by-side, facing their shadows. Adam is 159 centimeters tall and casts a shadow 105 centimeters in height. If Cara is 140 centimeters tall, how many centimeters will she need to walk forward for the tip of her shadow to be directly in line with Adam's?
6 2/5 subtract 2 9/10
Answer: 9 3/10
Step-by-step explanation:
6 + 2/5 + 2 + 9/10= 6 + 2 = 8 = 2/5 + 9/10= 4/10 + 9/10= 13/10= 1 3/10= 8 + 1 + 3/10= 9 3/10
Find Pythagorean Triples
1. Option a, c and e fulfill the Pythagorean triplet rule.
2. Option a, e, and f are the correct options.
3. Yes as per the Pythagoras theorem, all the sides will be proportional to the similar triangle.
Define Pythagoras theorem?The formula for the Pythagoras theorem is written as c² = a² + b², where c is the hypotenuse of the right triangle and a and b are its other two legs.
As a result, the Pythagoras equation can be used to any triangle that has one angle that is exactly 90° to create a Pythagoras triangle.
In question 1,
The Pythagorean triplets we have are:
5, 12, 13 as they fulfill the c² = a² + b², formula.
5, 10, 5√5 and 20, 99, 101
In the second question, we have the triplet 7, 24, 25
So the triangles similar to this will have proportionate sides.
So 14, 48, 50(sides have been doubled)
√7, √24, √25 (sides have been square rooted) and
35, 120 and 125(sides have been multiplied by 5)
are the sides that are proportional.
In the last question,
If the triangle has Pythagorean triplets, then for the other triangle to be similar the sides has to be multiples of the triplets or proportionate to them.
In this case its true, so the triangles are similar to each other.
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20 points! please help please give the right answer
Answer:
260
Step-by-step explanation:
First you find the area of the triangle
1/2×base×height
1/2×20×10
=100
Then you find the area of the rectangle
A=l×b
=20×8
=160
Then you add the area of the triangle with the area of the rectangle
160+100=260
Please see attachment
The binary number 1001100 is equivalent to the decimal number 76.
HOW TO CONVERT BINARY TO DECIMAL?
To convert a number in base 2 (binary) to base 10 (decimal), we need to multiply each digit of the binary number with its corresponding power of 2 and then sum up the results. The rightmost digit corresponds to 2, the next digit to 2 the next to 2², and so on, with each successive digit corresponding to the next higher power of 2.
For example, to convert the binary number 1001100 to decimal, we would start by multiplying the rightmost digit (0) by 2 raise the power 0, which equals 1. We would then multiply the next digit (0) by 2 raise the power 1, which equals 0, and so on, until we reach the leftmost digit (1), which corresponds to 2 raise the power 6. We then add up all of these products to get the decimal equivalent of the binary number.
So, using this method, we have:
1 x 2⁶ + 0 x 2⁵ + 0 x 2⁴ + 1 x 2³+ 1 x 2² + 0 x 2¹ + 0 x 2°= 64 + 0 + 0 + 8 + 4 + 0 + 0 = 76
Therefore, the binary number 1001100 is equivalent to the decimal number 76.
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The 12 students in the after-school gaming club are all wearing hats. The hats are
either red, blue, green, or black. There are 2 red hats and 1 blue hat. If you select a
student at random, it is likely that the student has a green hat. What is the greatest
possible number of black hats in the group? Explain.
The probability of the maximum number of black hats that could be present in the group is 2.
Since the probability of selecting a student with a green hat is the highest, it is likely that there are more green hats than any other color. Let's assume that there are 7 green hats. If there are 7 green hats, then there are only 5 hats left for the remaining colors. However, we know that there are only 2 red hats and 1 blue hat, leaving a maximum of 2 hats for the black color. Therefore, the greatest possible number of black hats in the group is 2, which would give a total of 2 red hats, 1 blue hat, 7 green hats, and 2 black hats. In conclusion, if the probability of selecting a student with a green hat is the highest, then the greatest possible number of black hats in the group is 2.
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I don't understand this as much as I went through it , pls help, very much appreciated
The cost per ride is $1.50: True.
The situation can be represented by the equation y = 15x + 15: False, it can be be represented by y = 1.5x + 15.
The initial entrance fee was $15: True.
How to calculate the slope of a line?In Mathematics and Geometry, the slope of any straight line can be determined by using the following mathematical equation;
Slope (m) = (Change in y-axis, Δy)/(Change in x-axis, Δx)
Slope (m) = rise/run
Slope (m) = (y₂ - y₁)/(x₂ - x₁)
By substituting the given data points into the slope formula, we have the following;
Slope (m) = (18 - 15)/(2 - 0)
Slope (m) = 3/2
Slope (m) = 1.50.
At data point (0, 15), a linear equation in slope-intercept form for this line can be calculated by using the point-slope form as follows:
y - y₁ = m(x - x₁)
y - 15 = 1.50(x - 0)
y - 15 = -1.50(x)
y = 1.50(x) + 15
When x = 0, the y-intercept is given by;
y = 1.50(x) + 15
y = 1.50(0) + 15
y = 15.
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What’s the answer to this question? I can’t seem to find the answer.
You could try factoring.
[tex]6x^2-x-1=(2x-1)(3x+1)\\3x^2+25x+8=(x+8)(3x+1)\\x^2+4x-32=(x+8)(x-4)\\2x^2+7x-4=(x+4)(2x-1)[/tex]
So your expression becomes...[tex]\frac{(2x-1)(3x+1)}{(x+8)(3x+1)}*\frac{(x+8)(x-4)}{(x+4)(2x-1)}=\frac{x-4}{x+4}[/tex].
HELP PLEASE
Lee puts $5,000 into a stock market index mutual fund That grew at an average of 6.5% per year for 10 years. Without any added deposits or withdrawals, about how much is in Lee's mutual fund account after only 8 years, if you ignore the come pounding?
Find the ordered pairs that make the sentence n = 4m - 3 true when m equals 6, 2, 0, and -3
Answer:
Step-by-step explanation:
to find the the answer you need to put it on the graph then find the thing you need to do to find out the correct answer
if x = 3/4y and y = 8 what is 3x-4
- 1 and combining like terms
(x² - 4x+9)-(3x² - 6x-9)
Combining the like terms of the expressions (x² - 4x+9)-(3x² - 6x-9) gives -2x² + 2x + 36
What are algebraic expressions?Algebraic expressions are simply described as those mathematical expressions that are known to consist of certain variables, coefficients, terms, factors and constants.
Algebraic expressions are also identified with arithmetic operations. These arithmetic operations are;
SubtractionBracketDivisionParenthesesMultiplicationAdditionFrom the information given, we have;
(x² - 4x+9)-(3x² - 6x-9)
First, expand the bracket
x² - 4x + 9 - 3x² + 6x + 27
Now, collect the like terms
x²- 3x² - 4x + 6x + 9 + 27
Add or subtract
-2x² + 2x + 36
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16 Extend Your Thinking Suppose you cut a square shape
in half, as shown. How can you find the area of one part
of the figure?
52 yd
3.
There are 15
students in class 7 who need the school shirt of same size and 23 meter of
cloth is required lo make a shirt.
(a)
1
(b)
Find the total length of the cloth required to make the shirt to them.
How many shirts can be made from a piece of cloth 9% meter long?
2
(c)
Convert the length of cloth required for shirt in decimal.
1
(d)
If the length of a piece of cloth is 36.25 meter, how many meters of cloth is left? 1
a. The total length of cloth required to make shirts for 15 students is 345 meters.
b. At least 23 meters of cloth to make one shirt
c. The length of cloth required for one shirt in decimal form is 23.00 meters.
d. 13.25 meters of cloth is left after making 1 shirt from a piece of cloth that is 36.25 meters long.
What is total length?
Whole Length (TL) is the measurement taken in a straight line, with the fish lying on its side, from the tip of the snout to the end of the tail (caudal fin).
(a) Total cloth required = 15 × 23 meters = 345 meters
Therefore, the total length of cloth required to make shirts for 15 students is 345 meters.
(b) Number of shirts = 9.5 meters ÷ 23 meters/shirt ≈ 0.413
Therefore, only 0 shirts can be made from a piece of cloth 9.5 meters long. We need at least 23 meters of cloth to make one shirt.
(c) 23 meters = 23.00 meters
Therefore, the length of cloth required for one shirt in decimal form is 23.00 meters.
(d) Number of shirts = 36.25 meters ÷ 23 meters/shirt ≈ 1.576
The amount of cloth left over after making 1 shirt is:
Cloth left over = 36.25 meters - 23 meters = 13.25 meters
Therefore, 13.25 meters of cloth is left after making 1 shirt from a piece of cloth that is 36.25 meters long.
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Answer:
Step-by-step explanation:
is the statement for a set of decimals, the longest numeral will belong to the largest number?
The statement “For a set of decimals, the longest numeral will belong to the largest number” is false because it doesn't determine the value of a number.
What is a numerical data?In Mathematics and statistics, a numerical data can be defined as a data set that is primarily expressed in numbers only. This ultimately implies that, a numerical data refers to a data set consisting of numbers rather than words.
In Mathematics and statistics, a numeral simply refer to the symbol and numerical figure that is used for representing or denoting a numerical data (number).
For instance, by using the numerical data (numbers) 8 and 9;
8 is represented as VIII in Roman numerals while 9 is represented as IX in Roman numerals. However, the numeral VIII for 8 is longer than the numeral IX for 9, but IX for the number 9 is greater than VIII for the number 8.
In conclusion, we can logically deduce that the given statement is false.
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Complete Question:
Is the statement “For a set of decimals, the longest numeral will belong to the largest number” true or false?
Match the number of triangles formed or the interior angle sum to each regular polygon.
The number of triangles formed or the interior angle sum to each regular polygon:
Number of triangles formed is 4 - Regular octagon
Interior angle sum is 1,440 - Regular dodecagon
Interior angle sum is 1,800 - Regular decagon
Number of triangles formed is 6 - Regular hexagon
What is triangle?A triangle is a geometric shape that consists of three straight line segments that are connected to form three angles. The three line segments are called sides and the three angles are located at the vertices (corners) where the sides meet.
Here,
The number of triangles formed in a regular polygon is related to the number of sides it has. For a regular polygon with n sides, the number of triangles formed is (n-2). For example, a regular hexagon has six sides, so the number of triangles formed is (6-2) = 4. The interior angle sum of a regular polygon is related to the number of sides it has as well. The formula to find the interior angle sum of a regular polygon with n sides is: Interior angle sum = (n-2) x 180 degrees
For example, a regular dodecagon has 12 sides, so its interior angle sum is (12-2) x 180 = 1,800 degrees. Similarly, a regular octagon has 8 sides, so its interior angle sum is (8-2) x 180 = 1,080 degrees.
Therefore, based on the given information, we can match the number of triangles formed and the interior angle sum to each regular polygon as follows:
Regular octagon: Number of triangles formed is 4 (column 1) and Regular octagon is matched to 1 (column 2).
Regular hexagon: Number of triangles formed is 6 (column 1) and Regular hexagon is matched to 2 (column 2).
Regular decagon: Interior angle sum is 1,800 (column 1) and Regular decagon is matched to 3 (column 2).
Regular dodecagon: Interior angle sum is 1,440 (column 1) and Regular dodecagon is matched to 4 (column 2).
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Ken made a scale drawing of a neighborhood park. He used the scale 2 inches : 1 yard. The actual width of a soccer field in the park is 58 yards. How wide is the field in the drawing?
The width of the soccer field in the drawing is 116 inches if the ratio is 2 inches to 1 yard
How wide is the field in the drawing?If 2 inches on the drawing represents 1 yard in reality, then 1 inch on the drawing represents 1/2 yard in reality.
So, to find the width of the soccer field in the drawing, we can use the following proportion:
1 inch on drawing / (1/2) yard in reality = x inches on drawing / 58 yards in reality
Simplifying this proportion, we get:
x inches on drawing = (1 inch on drawing / (1/2) yard in reality) * 58 yards in reality
x inches on drawing = 2 * 58
x inches on drawing = 116
Therefore, the width of the soccer field in the drawing is 116 inches.
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I need some helpppppppppppppppp
Answer:
Step-by-step explanation:
The corresponding equal angles must be written in the same order. So the first one is the correct answer.
Eliana opened a savings account and deposited $700.00 as principal. The account earns 4%
interest, compounded monthly. What is the balance after 10 years?
Answer:
We can use the formula for compound interest to find the balance in Eliana's savings account after 10 years:
A = P(1 + r/n)^(nt)
where A is the balance, P is the principal (initial deposit), r is the annual interest rate as a decimal, n is the number of times interest is compounded per year, and t is the time in years.
Substituting the given values, we get:
A = $700(1 + 0.04/12)^(12*10)
Simplifying, we get:
A = $700(1.0033333)^120
Using a calculator, we get:
A ≈ $1,038.81
Therefore, the balance in Eliana's savings account after 10 years is approximately $1,038.81.
1.1.3 Quiz: Exponents
Question 2 of 10
Simplify (6^7)³.
Answer:6^21
Step-by-step explanation:
A survey was conducted that asked 1015 people how many books they had read in the past year. Results indicated that x=10.5 books and s=16.6 books. Construct a 95% confidence interval for the mean number of books people read. Interpret the interval.
Construct a 95% confidence interval for the mean number of books people read and interpret the result. Select the correct choice below and fill in the answer boxes to complete your choice.
A. There is a 95% probability that the true mean number of books read is between ? and ?
B. If repeated samples are taken, 95% of them will have a sample mean between ? and ?
C. There is 95% confidence that the population mean number of books read is between ? and ?
A 95% confidence interval that the t population mean number of books is between 9.89 and 11.11 books.
What is confidence interval ?
A confidence interval is a statistical range that provides an estimate of the likely range of values for a population parameter (such as a mean, proportion, or standard deviation) based on a sample of data. It is calculated using a specific level of confidence, which represents the probability that the true population parameter falls within the calculated range.
Confidence intervals are typically expressed as a range of values with a margin of error or standard error. The margin of error represents the amount of random variation that is expected due to sampling error, while the standard error reflects the variability of the sample data.
According to the question:
C. There is 95% confidence that the population mean number of books read is between a lower bound of approximately 9.89 books and an upper bound of approximately 11.11 books.
To construct the confidence interval, we can use the formula:
[tex]CI =\bar x \± z* (s/\sqrt{n})[/tex]
substitute the values, we get:
CI = 10.5 ± 1.96 * (16.6/√1015)
CI = (9.89, 11.11)
This means that we are 95% confident that the population mean number of books is between 9.89 and 11.11 books.
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Suppose the line segments that represent Maple Street and Hazel Street are reflected in the y-axis and translated down 5 units to form two new streets.
As a result, the two new streets formed by reflecting and translating the expression original streets will be parallel and 5 units apart, with one to the left.
what is expression ?In mathematics, an expression is a group of representations, digits, and conglomerates that resemble a statistical correlation or regimen. An expression can be a real number, a mutable, or a combination of the two. Addition, subtraction, rapid spread, division, and exponentiation are examples of mathematical operators. Arithmetic, mathematics, and shape all make extensive use of expressions. They are used in mathematical formula representation, equation solution, and mathematical relationship simplification.
If we reflect the line segment that represents Maple Street in the y-axis, the resulting street will be to the left of the y-axis, and if we translate it down 5 units, the new street will be parallel to but 5 units below the original Maple Street. Similarly, reflecting the line segment that represents Hazel Street in the y-axis results in a street to the right of the y-axis, and translating it down 5 units results in a new street parallel to the original Hazel Street but 5 units below it.
As a result, the two new streets formed by reflecting and translating the original streets will be parallel and 5 units apart, with one to the left.
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Find the volume of this cylinder.
Give your answer to 1 decimal place.
20 cm
9 cm
Step-by-step explanation:
the answer will be 1272.7cm3
the formula of the volume of the cylinder is pie×radius squared×height so,
we will get the radius and the radius is half of the diameter and the diameter is 9 so 9÷2=4.5 and then it will be squared so it will be 20.25cm2 and so we will write it this way
3.14×20.25×20=1271.7cm3
hope this helped
xoxo adham