1)calculate the mean and standard deviation of the sampling distribution of
for srss of size 15.
2)interpret the standard deviation from part (1).
3)find the probability that the sample mean weight is greater than 3.55 kilograms.

Answers

Answer 1

It should be noted that to calculate the mean and standard deviation of the sampling distribution, you need to know the population mean (μ) and standard deviation (σ) and the sample size (n) of the distribution.

How to explain the mean

The mean (μx) of the sampling distribution of the sample mean (x) is equal to the population mean (μ):

μx = μ

The standard deviation (σx) of the sampling distribution of the sample mean (x is equal to the population standard deviation (σ) divided by the square root of the sample size (n):

σx = σ / √n

Therefore, in order to calculate the mean and standard deviation of the sampling distribution, you just need to plug in the values of μ, σ, and n into these formulas.

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How does one calculate mean and standard deviation of the sampling distribution.

How to interpret the standard deviation from part (1).


Related Questions

Describe the transformations f(x)= square root 4x

Answers

The transformation of f(x) = √(4x) from the parent function g(x) = √(x) includes a horizontal stretch by a factor of 1/4, with no horizontal or vertical shifts.


The function f(x) = √(4x) is a transformation of the parent function, g(x) = √(x). The transformations include a horizontal stretch, a horizontal shift, and a vertical shift. Let's break down each transformation step-by-step:
1. Horizontal Stretch: The factor 4 inside the square root function multiplies the input (x) by 4. This results in a horizontal stretch by a factor of 1/4, meaning the graph is compressed horizontally towards the y-axis.


2. Horizontal Shift: There is no additional value added or subtracted from the input (x), so there is no horizontal shift in this function. The graph remains in its position along the x-axis.
3. Vertical Shift: Similarly, there is no additional value added or subtracted from the output (the entire function), so there is no vertical shift in this function. The graph remains in its position along the y-axis.
This results in the graph of f(x) being compressed towards the y-axis compared to the graph of g(x).

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After finding the area from the dimensions of the first polygon, find the area of the similar polygon after finding the similarity ratio.

Answers

Hi! To find the area of the similar polygon after finding the area of the first polygon and the similarity ratio, follow these steps:

1. Find the dimensions of the first polygon.
2. Calculate the area of the first polygon using the dimensions.
3. Determine the similarity ratio between the first polygon and the similar polygon.
4. Use the similarity ratio to find the corresponding dimensions of the similar polygon.
5. Calculate the area of the similar polygon using the new dimensions.

In your answer: After finding the area from the dimensions of the first polygon, find the area of the similar polygon by determining the similarity ratio and using it to calculate the corresponding dimensions of the similar polygon. Then, calculate the area of the similar polygon using the new dimensions.

To find the area of the similar polygon, you'll need to use the similarity ratio, which compares the corresponding lengths of the sides of two similar figures. Once you have the similarity ratio, you can multiply the area of the first polygon by the ratio squared to get the area of the similar polygon.

Remember, the area of a polygon is found by multiplying the base by the height (or using another appropriate formula depending on the shape of the polygon). So, to summarize, you would first find the area of the first polygon using its dimensions, then use the similarity ratio to find the corresponding sides of the similar polygon, and finally use these sides to find the area of the similar polygon.

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Neave is designing a prize wheel for her school. 200 students will each spin the wheel once. Neave wants the expected number of winners to be 60.

If the wheel is split into 40 equally sized sections, how many sections should be marked “win”

Answers

Neave should mark 12 sections as "win" on the prize wheel to achieve the expected number of winners of 60 out of 200 students.

To determine how many sections should be marked "win" on Neave's prize wheel, we need to consider the expected number of winners and the total number of sections on the wheel.

Neave wants the expected number of winners to be 60 out of 200 students. This means that the probability of winning should be 60/200 = 0.3 or 30%.

If the wheel is split into 40 equally sized sections, we can assume that each section has an equal probability of being selected by a student. Therefore, to have a 30% chance of winning, we need to mark a proportionate number of sections as "win".

To calculate the number of sections to mark as "win", we multiply the total number of sections by the desired probability of winning:

40 sections * 0.3 = 12 sections.

It's important to note that the concept of expected value assumes an idealized scenario with perfect randomness. In reality, the actual number of winners may vary due to random chance and individual spin outcomes.

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Find the value of each variable. For theâ circle, the dot represents the center.



A four sided polygon is inside a circle such that each vertex of the polygon is a point on the circle. The top and bottom sides of the polygon slowly rise from left to right. The left and right sides of the polygon quickly fall from left to right. The angle measures of the polygon are as follows, clockwise from the top left: "c" degrees, 123 degrees, 92 degrees, and "d" degrees. The arc bounded by the left side of the polygon is labeled 94 degrees. The arc bounded by the right side of the polygon is labeled "b" degrees. The arc bounded by the bottom side of the polygon is labeled "a" degrees.



123 degrees



92 degrees



94 degrees



c degrees



d degrees



b degrees



a degrees

Answers

The values of the variables are:

c = 86 degrees

d = 168 degrees

a = 57 degrees

b = 94 degrees

Since the polygon is inscribed in a circle, the opposite angles of the polygon are supplementary. Thus, we have:

The top and bottom angles of the polygon are supplementary to angle "d":

c + 92 + 123 = 180 + d

The left and right angles of the polygon are supplementary to angle "c":

c + 94 = 180, so c = 86

The angle "a" is supplementary to angle "d":

a + 123 = 180 + d

The angle "b" is supplementary to angle "c":

b + 86 = 180

Substituting the values of "c" and solving the system of equations, we get:

d = 168

a = 57

b = 94

Therefore, the values of the variables are:

c = 86 degrees

d = 168 degrees

a = 57 degrees

b = 94 degrees

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Write an expression for the nth term of the sequence. (Your formula should work for n=1,2,...) 4 5 6 7 5 6 7 8 Need Help? Watch

Answers

The nth term of the sequence 4 5 6 7 5 6 7 8 is given by a_n = 3 + (n-1)/2 for odd n and a_n = 4 + (n-2)/2 for even n.

How to find the nth term of a given sequence?

To find the nth term of the given sequence, we need to observe the pattern in the sequence. We can see that the sequence consists of two parts:

the first part is a consecutive sequence of integers starting from 4, and the second part is a consecutive sequence of integers starting from 5, where the second part starts right after the first part ends.

So, we can express the nth term of the sequence as follows:

If n is odd, then the nth term is given by:

a_n = 3 + (n-1)/2

If n is even, then the nth term is given by:

a_n = 4 + (n-2)/2

Using this formula, we can find any term of the given sequence by plugging in the corresponding value of n. For example:

When n=1, the first term is 4: a_1 = 4.

When n=6, the sixth term is 6: a_6 = 6.

When n=7, the seventh term is 7: a_7 = 7.

When n=8, the eighth term is 8: a_8 = 8.

Note that this formula works only for n = 1, 2, 3, 4, 5, 6, 7, 8, ... , since the sequence has only 8 terms.

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How would the equation for the blade of the wind turbine change if the point starts at the π2

position?

Answers

If the point starts at the π/2 position, the equation for the blade of the wind turbine will be sin(θ + π/2) = sin(θ - π/2)cos(β) + cos(θ - π/2)sin(β).

The equation for the blade of the wind turbine is given by the expression sin(θ) = sin(θ - β)cos(α) + cos(θ - β)sin(α), where θ represents the angle of the blade, β represents the angle between the wind direction and the blade, and α represents the pitch angle of the blade.

If the point starts at the π/2 position, we need to substitute θ + π/2 for θ in the equation. This gives us sin(θ + π/2) = sin(θ - β + π/2)cos(α) + cos(θ - β + π/2)sin(α).

Using trigonometric identities, we can simplify this expression to sin(θ + π/2) = cos(θ - β)cos(α) - sin(θ - β)sin(α).

Finally, substituting β for (π/2 - β) in the above equation, we get sin(θ + π/2) = sin(θ - π/2)cos(β) + cos(θ - π/2)sin(β). This is the required equation for the blade of the wind turbine if the point starts at the π/2 position.

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Rosemary chooses to attend the University of Houston to earn her degree. Rosemary has $2,500 in her savings and a $1,000 savings bond from her grandparents to use for college. What is the estimated contribution needed from other sources to pay for Rosemary's first year? Display keyboard shortcuts for Rich Content Editor

Answers

The estimated contribution for Rosemary's first-year college fee is $6,500 including all her savings and available funds.

Savings of Rosemary = $2,500

Savings from bond = $1000

To calculate the contribution needed for Rosemary from other sources, to pay her college fee, we need to add all the available funds and subtract the money for her college fee.

Let us imagine that the total cost of Rosemary's college = $10,000

Total available funds = $2,500  + $1,000

Total available funds = $3500

The remaining amount needed = $10,000 - $3,500 = $6,500

Therefore, we can conclude that Rosemary would need an estimated contribution of $6,500.

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Find the volume of the cone in cubic feet. Use 3. 14 for π and round your answer to the nearest tenth.





(1 m ≈ 3. 2808 ft)


135,648 ft3


3,843. 8 ft3


4,790,189. 2 ft3


444,925. 4 ft3

Answers

The volume of the cone in cubic feet is approximately 0.0 cubic feet

We need to convert the given dimensions from inches to feet before calculating the volume in cubic feet.

The height of the cone is 6 inches, which is equivalent to 6/12 = 0.5 feet (since there are 12 inches in 1 foot).

The radius of the cone is 4.5 inches, which is equivalent to 4.5/12 = 0.375 feet.

Using the formula for the volume of a cone, which is:

V = (1/3) * π * r^2 * h

Substituting the given values, we get:

V = (1/3) * 3.14 * (0.375 feet)^2 * 0.5 feet

V ≈ 0.0221 cubic feet

Rounding this to the nearest tenth gives:

V ≈ 0.0 cubic feet

Therefore, the volume of the cone in cubic feet is approximately 0.0 cubic feet. None of the given options match this result.

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Which of the lines below match the function given? y = x + 5 A graph with 4 lines, labeled A, B , C, and D. Line A contains the points 0 comma 0, and 2 comma 2. Line B contains the points 0 comma 5, and 2 comma 7. Line C contains the points 0 comma 0, and 2 comma 4. Line D contains the points 0 comma 2, and 1 comma 5.

Answers

Therefore , the solution of the given problem of function comes out to be Line B  to the function y = x+5.

Describe function.

On the midterm exam, there will be a variety of inquiries in each subject, including inquiries concerning both hypothetical and actual places as well as inquiries relating the creation of numerical variables. a diagram showing the relationships between different elements that cooperate to generate the same result. A service is composed of numerous distinctive components that cooperate to create distinctive results for each input.

Here,

The function is represented as

=> y = x + 5, which has a y-intercept of 5, a slope of 1, and a slope of 1.

By comparing the slope and y-intercept of each line to those of the function, we may determine which line best fits it.

Line A does not fit the function because it has a slope of 1 and a y-intercept of 0.

The function y = x + 5 is satisfied by line B, which has a slope of 1 and a y-intercept of 5.

Line C does not fit the function because it has a slope of 2 and a y-intercept of 0.

Line D does not fit the function because it has a slope of 3 and a y-intercept of 2.

Line B therefore corresponds to the function y = x+5.

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Use the function f(t) = -16t^2 + 60t + 16 to answer parts A, B, and C.

(Look at the image!)

Answers

1) Note that t is either 4 or -0.25 by virtue of the quadratic function.

2) the vertex and line of summer try are t = 1.875. See the attached graph.

How did we arrive at the above conclusion?

First, identify the values of a, b, and c in the equation...

a = -16

b = 60

c = 16

substitute these values into the quadratic formula

t = (-b ± √(b² - 4ac)) / 2a

t = (-60 ± √(60² - 4(-16)(16))) / 2(-16)

t = (-60 ± √(3600 + 1024)) / (-32)

t = (-60 ± √(4624)) / (-32)

t = (-60 ± 68) / (-32)

So, t can be:

t = (-60 + 68) / (-32) = -1/4

or

t = (-60 - 68) / (-32) = 4

2) To find the line of symmetry, we used t = -b/2a

-60/2(-16)

t = 1.875

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7. Melissa wants to check the accuracy of the finance charge on her promissory note. She has a $6,000, four-year loan at an APR of 10%. A. What is the monthly payment? b. What is the total amount of the monthly payments? c. What is the finance charge?​

Answers

A. Melissa's monthly payment is approximately $146.89.

B. The total amount of the monthly payments over the four-year period is approximately $7,052.72.

C. The finance charge on the loan is approximately $1,052.72.

What is simple interest?

The interest on a loan or principal amount can be easily calculated using simple interest. Simple interest is a notion that is employed across a wide range of industries, including banking, finance, automobiles, and more.

To calculate the monthly payment, we can use the formula:

Monthly payment = [P x r x (1 + r)ⁿ] / [(1 + r)ⁿ⁻¹]

where P is the principal (the amount of the loan), r is the monthly interest rate, and n is the number of monthly payments.

A. To find the monthly payment, we first need to calculate the values of r and n.

Since the APR is 10%, the monthly interest rate is 10% / 12 = 0.00833 (rounded to 5 decimal places).

The number of monthly payments over four years is 4 x 12 = 48.

Using these values, we can calculate the monthly payment:

Monthly payment = [6000 x 0.00833 x (1 + 0.00833)⁴⁸] / [(1 + 0.00833)⁴⁸⁻¹]

Monthly payment ≈ $146.89

So Melissa's monthly payment is approximately $146.89.

B. To find the total amount of the monthly payments, we can multiply the monthly payment by the number of payments:

Total amount of monthly payments = Monthly payment x Number of payments

Total amount of monthly payments = $146.89 x 48

Total amount of monthly payments ≈ $7,052.72

So the total amount of the monthly payments over the four-year period is approximately $7,052.72.

C. To find the finance charge, we can subtract the original principal from the total amount of the monthly payments:

Finance charge = Total amount of monthly payments - Principal

Finance charge = $7,052.72 - $6,000

Finance charge ≈ $1,052.72

So the finance charge on the loan is approximately $1,052.72.

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A designer is planning a trai
l mix box that is
shaped l
ike a rectangular prism. The front of
the box must have the width and height shown.
The volume of the box must be 162 cubic
inches. What must be the depth, d, of the box?
HELP

Answers

The depth of trail mix box that is shaped like a rectangular prism must be 2.4 inches.

How can we estimate the depth of the box?

We are going to use the formula for determining volume to work out the depth of the rectangular prism.

The volume of a rectangular prism is given by the formula:

V = l × w × h

where:

V = the volume

l = the length

w = the width

h = the height.

Given:

w = 7.5 inches

h = 9 inches

V = 162 cubic inches

Now, we are to find the value of d, the depth of the box, which corresponds to the length of the rectangular prism.

Substituting the values into the formula for volume:

162 = d × 7.5 × 9

Simplifying the right-hand side:

162 = 67.5d

Dividing both sides by 67.5, we get:

d = 162 ÷ 67.5

d = 2.4 inches

Therefore, the depth of the box shaped as rectangular prism = 2.4 inches.

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Use variation of parameters to find the particular solution to y''+y' - 12y = - 340 sin(t) Y(t) =

Answers

The particular solution Yp(t) is found by following these steps and combining it with the complementary solution Yc(t) to get the general solution Y(t) = Yc(t) + Yp(t).

To find the particular solution to [tex]y'' + y' - 12y = -340sin(t)[/tex] using variation of parameters, follow these steps:
1. Find the complementary solution Yc(t) for the homogeneous equation [tex]y'' + y' - 12y = 0[/tex]. The characteristic equation is[tex]r^2 + r - 12 = 0[/tex], which has roots r1 = -4 and r2 = 3. Thus, [tex]Yc(t) = C1e^(-4t) + C2e^(3t)[/tex].

2. Assume the particular solution Yp(t) is in the form [tex]Yp(t) = u1(t)e^(-4t) + u2(t)e^(3t)[/tex]. Calculate the Wronskian [tex]W(Y1, Y2) using Y1 = e^(-4t) and Y2 = e^(3t).[/tex]  3. Find u1'(t) and u2'(t) using the given nonhomogeneous equation: -340sin(t) = -Y1(t)u1'(t) + Y2(t)u2'(t).

4. Integrate u1'(t) and u2'(t) to find u1(t) and u2(t).
5. Plug u1(t) and u2(t) back into the particular solution [tex]Yp(t) = u1(t)e^(-4t) + u2(t)e^(3t[/tex]).

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Solve systems of Equation by substitution method
3(x-2) + y = 7

4x - 3(y-1) = 16

Answers

The values of the variables are x = 4 and y = 1

How to solve the equation

We have the equations as;

3(x-2) + y = 7

4x - 3(y-1) = 16

Using the substitution method

Make 'y' the subject of formula from equation (1), we have;

y = 7 - 3(x-2)

Now, substitute the expression as y in equation (2), we get;

4x - 3(7 -  3(x-2) - 1) = 16

expand the bracket, we have;

4x - 3(7 - 3x + 6 - 1) = 16

collect the like terms

4x - 3(12 - 3x) = 16

4x - 36 + 9x = 16

collect the like terms

13x = 52

x = 4

Substitute the value

y = 7 - 3(4 -2 )

y = 7 -3(2)

y = 1

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O A fifth grade
class is split into groups
of
students. The teacher brought in candy
bars for a fraction celebration. When it
was time for
the celebration,
the teacher'
gave each
group
6
candi bars. How much
does each student get. Al representation

Answers

Answer:

IT depends on how many kids there are per group.

Step-by-step explanation:

If I lose 20 cents an hour, and I make 10. 50 an hour. How much money do I lose every 10 dollars?


This is the simplest way I could figure out how to put it, sorry

Answers

You lose 515 dollars every time you lose 10 dollars.

Now that we know it takes 50 hours to lose 10 dollars, we can calculate how much money you lose every 10 dollars by

the hourly rate of 10.50 dollars by 50 hours and subtracting that amount from 10 dollars:

Money lost = (10.50 dollars/hour) x 50 hours - 10 dollars

Money lost = 525 dollars - 10 dollars

Money lost = 515 dollars

Therefore, you lose 515 dollars every time you lose 10 dollars.

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19. The functions f and g are defined by f(x) = 2x/x-2 and g(x) = x + 4 respectively. Find
gf.

Answers

Answer:

gf(x) = g(f(x)) = (x+4)(2x/x-2) = 2x^2 + 8x - 8

A consumer group is investigating two brands of popcorn, R and S. The population proportion of kernels that will pop for Brand R is 0. 90. The population proportion of kernels that will pop for Brand S is 0. 85. Two independent random samples were taken from the population. The following table shows the sample statistics. Number of Kernels in Samples Proportion from Sample that Popped Brand R 100 0. 92 Brand S 200 0. 89 The consumer group claims that for all samples of size 100 kernels from Brand R and 200 kernels from Brand S, the mean of all possible differences in sample proportions (Brand R minus Brand S) is 0. 3. Is the consumer group’s claim correct? Yes. The mean is 0. 92−0. 89=0. 3. Yes. The mean is 0. 92 minus 0. 89 equals 0. 3. A No. The mean is 0. 92+0. 892=0. 905. No. The mean is the fraction 0. 92 plus 0. 89 over 2 equals 0. 905. B No. The mean is 0. 92−0. 892=0. 15. No. The mean is the fraction 0. 92 minus 0. 89 over 2 equals 0. 15. C No. The mean is 0. 90+0. 852=0. 875. No. The mean is the fraction 0. 90 plus 0. 85 over 2 equals 0. 875. D No. The mean is 0. 90−0. 85=0. 5

Answers

The mean of all possible differences in sample proportions (Brand R minus Brand S) is given by:

mean = pR - pS,

where pR is the population proportion of kernels that will pop for Brand R, and pS is the population proportion of kernels that will pop for Brand S.

Substituting the given values, we get:

mean = 0.90 - 0.85 = 0.05

However, the consumer group claims that the mean of all possible differences in sample proportions is 0.3. This claim is not supported by the calculations above.

Therefore, the correct answer is:

C) No. The mean is 0.90+0.85/2=0.875. No. The mean is the fraction 0.90 plus 0.85 over 2 equals 0.875.

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Which equations are true for x = –2 and x = 2? Select two options x2 – 4 = 0 x2 = –4 3x2 + 12 = 0 4x2 = 16 2(x – 2)2 = 0

Answers

Answer:

Here we try the method of trial and error to find out if the equations have a common answer as zero

Step-by-step explanation:

Now,

(a) x²-4=0

(b) x²=-4

(c) 3x²+12=0

(d) 4x²=16

(e) 2(x-2)2=0

Here if we check the first equation i.e x²-4=0

Equating - 2²-4=4-4

=0

2²-4= 4-4

=0

So option (a) is true

Now x²=-4

Substituting, - 2²=4 & 2²=4

So here we get 4≠-4

Therefore, (b) is not true

Now 3x²+12=0

3(-2)²+12= 3(4)+12

=12+12= 24

3(2)²+12= 12+12

= 24

4x²=16

Substituting, 4(-2)²= 4(4)= 16

4(2)²= 4(4)= 16

So option (d) is also true

Now, 2(x-2)2=0

Substituting, 2(-2-2)2= 2(-4)2

4(-4)= - 16

2(2-2)2= 2(0)2

=4(0)=0

Here when we put x=-2, we get - 16

when we put x=2, we get 0

So the following equation is true only for x=2 and not x=-2

I hope this helps ;)

Find the equation that has given solutions: x=-5 and x =2

Answers

The equation that has given solutions x = -5 and x = 2 is [tex]x^2 + 3x - 10 = 0.[/tex]

If the given solutions of an equation are x = -5 and x = 2, then the equation can be written as a product of two linear factors, (x + 5) and (x - 2), because when either of these factors is equal to zero, the corresponding solution is obtained.

So, the equation is:

(x + 5)(x - 2) = 0

Expanding the product, we get:

[tex]x^2 + 3x - 10 = 0[/tex]

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Suppose that the cost, in dollars, for a company to produce x pairs of a new line of jeans is C(x) = 2300 + 5x + 0.01x2 + 0.0002x? (a) Find the marginal cost function 5 + 0.02x + 0.0006r2 (b) Find C'(100) C'(100) = 11 What does this predict? The exact cost of the 100th pair of jeans. The approximate cost of the 101st pair of jeans. The approximate cost of the 100th pair of jeans. The exact cost of the 101st pair of jeans The exact cost of the 99th pair of jeans. (c) Find the difference between C'(100) and the actual cost of manufacturing the 101st pair of jeans (Round your answer to two decimal places.) $ 3100

Answers

The exact cost of the 100th pair of jeans. The approximate cost of the 101st pair of jeans. The approximate cost of the 100th pair of jeans. The exact cost of the 101st pair of jeans The exact cost of the 99th pair of jeans.

The marginal cost function of  C(x) = 2300 + 5x + 0.01x2 + 0.0002x is $3100

Process of finding marginal cost:


(a) To find the marginal cost function, we need to take the derivative of the cost function C(x) with respect to x. This gives us:

C'(x) = 5 + 0.02x + 0.0006x^2


So the marginal cost function is:

MC(x) = 5 + 0.02x + 0.0006x^2

(b) To find C'(100), we simply plug in x = 100 into the marginal cost function we just found:

C'(100) = 5 + 0.02(100) + 0.0006(100)^2 = 11

This predicts the exact cost of manufacturing the 101st pair of jeans.

The approximate cost of the 101st pair of jeans can be found by plugging in x = 101 into the original cost function C(x):

C(101) = 2300 + 5(101) + 0.01(101)^2 + 0.0002(101) ≈ $3120.02

The approximate cost of the 101st pair of jeans.

The exact cost of the 100th pair of jeans can be found by plugging in x = 100 into the original cost function C(x):

C(100) = 2300 + 5(100) + 0.01(100)^2 + 0.0002(100) = $3100

Hence the marginal cost is $3100

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The assembly consists of two 10mm diameter rods a-b and c-d, a 20 mm diameter rod e-f and a rigid bar h; point g is located at mid-distance between points e and f. all rods are made of copper with e = 101 gpa. if the magnitude of one force p is 10 kn, determine reactions at points a, c, and f.

Answers

Reactions at points A, C, and F are as follows: RA = -RC, RAy = RCy, and RF = 10 kN.

To determine reactions at points A, C, and F for the assembly consisting of two 10mm diameter rods (A-B and C-D), a 20mm diameter rod (E-F), and a rigid bar (H), with point G located midway between points E and F, and a force of 10 kN applied:

First, calculate the cross-sectional areas of the rods:
A1 = π(10mm)² / 4 = 78.54 mm² (for rods A-B and C-D)
A2 = π(20mm)² / 4 = 314.16 mm² (for rod E-F)

Next, calculate the effective modulus of elasticity for each rod:
E1 = E2 = 101 GPa

Now, use equilibrium equations to determine reactions at points A, C, and F:
ΣFx = 0: RAx + RCx = 0
ΣFy = 0: RAy + RCy + RF = -10 kN
ΣMG = 0: (RAy)(L/2) - (RCy)(L/2) = 0

Solving the equilibrium equations, we get:
RAx = -RCx
RAy = RCy
RF = 10 kN

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The dot plot shows the number of pencils each boy has at his desk in class.
+++ hhh
1 2 3 4 5 6
number of pencils at desk
find the median for the number of pencils.

Answers

The median for the number of pencils can be found by locating the middle value on the dot plot, which appears to be 3 pencils.

What is the middle value of the number of pencils on the dot plot?

The dot plot displays the number of pencils each boy has at his desk in class. By locating the middle value of the data on the dot plot, the median number of pencils can be determined to be 3.

This indicates that half of the boys have 3 pencils or fewer, while the other half have 4 pencils or more.

The dot plot provides a visual representation of the distribution of the data and allows for easy identification of the median value.

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Find the absolute maximum and minimum of the function f(x,y)=y√x−y2−x+3y on the domain 0≤x≤9, 0≤y≤8

Answers

The absolute maximum of the function f(x,y) = y√(x-y^2)-x+3y on the domain 0≤x≤9, 0≤y≤8 is 2√2, which occurs at the point (2,2).

The absolute minimum of the function is -8, which occurs at the point (0,2).

To find the absolute maximum and minimum of the function f(x,y) = y√(x-y^2)-x+3y on the domain 0≤x≤9, 0≤y≤8, we need to evaluate the function at the critical points and at the boundary of the domain.

The critical points of the function are the points where the partial derivatives with respect to x and y are both zero. Solving these equations, we get:∂f/∂x = -1 + y/(√(x-y^2)) = 0∂f/∂y = √(x-y^2) - 1 + 3 = 0Solving these equations, we get two critical points: (0,2) and (2,2). Evaluating the function at these points, we get:f(0,2) = -8f(2,2) = 2√2Next, we need to evaluate the function at the boundary of the domain. This includes the points (0,y), (9,y), (x,0), and (x,8).

Evaluating the function at these points, we get:f(0,y) = -x+3yf(9,y) = y√(9-y^2)-6f(x,0) = -xf(x,8) = 8√(x-64/9)-x+24Taking the maximum and minimum values of the function at the critical points and on the boundary of the domain, we see that the absolute maximum of the function is 2√2, which occurs at the point (2,2), and the absolute minimum of the function is -8, which occurs at the point (0,2).

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John owns 10 shirts and needs to select 5 to wear to school next week. How many ways can he choose the shirts? (hint: combinations)
50 ways
B 252 ways
500 ways
D 792 ways

Answers

There are 252 different combinations of shirts, the correct option is B.

In how many ways he can choose the shirts?

Remember that if you have N elements, and you want to select K of these, the number of combinations is given by:

[tex]C(N, K) = \frac{N!}{(N - K)!*K!}[/tex]

Here we have 10 shirts and we want to select 5 of these, so the number of combinations is given by:

[tex]C(10, 5) = \frac{10!}{(10 - 5)!*5!} \\\\C(10, 5) = \frac{10*9*8*7*6}{5*4*3*2} = 252[/tex]

There are 252 different combinations, so the correct option is B.

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A student has a rectangular bedroom. If listed as ordered pairs, the corners of the bedroom are (21, 18), (21, −7), (−12, 18), and (−12, −7). What is the perimeter in feet?
A: 116
B: 58
C: 33
D: 25

Answers

The perimeter of the bedroom is 116ft

What is perimeter of rectangle?

A rectangle is a type of quadrilateral, whose opposite sides are equal and parallel.

The perimeter of a rectangle is expressed as;

P = 2(l+w)

where l is the length and w is the width of the rectangle.

length = √ 21-21)²+ 18-(-7)²

= √25²

l = 25 ft

width = √ 21-(-12)²+18-18)²

= √ 33²

= 33

Perimeter = 2(33+25)

= 2 × 58

= 116ft

therefore the perimeter of the bedroom is 116ft.

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Internet Use A survey of U. S. Adults ages 18–29 found that 93% use the


Internet. You randomly select 100 adults ages 18–29 and ask them if they use


the Internet.



(a) Find the probability that exactly 90 people say they use the Internet.


(b) Find the probability that at least 90 people say they use the Internet.


(c) Find the probability that fewer than 90 people say they use the Internet.


(d) Are any of the probabilities in parts (a)-(c) unusual? Explain.

Answers

a. The probability that exactly 90 people say they use the Internet is 0.0391

b. The probability that at least 90 people say they use the Internet is 0.1933

c. The probability that fewer than 90 people say they use the Internet is 0.8067

d. The first probability is unusual

How to solve the problems

(a) Find the probability that exactly 90 people say they use the Internet.

P(X = 90) = C(100, 90) * (0.93)^90 * (0.07)^10

P(X = 90) ≈ 0.0391

(b) Find the probability that at least 90 people say they use the Internet.

P(X ≥ 90) = P(X = 90) + P(X = 91) + ... + P(X = 100)

To calculate this, we can use cumulative binomial probability:

P(X ≥ 90) ≈ 1 - P(X ≤ 89) ≈ 1 - 0.8067 = 0.1933

(c) Find the probability that fewer than 90 people say they use the Internet.

P(X < 90) = P(X ≤ 89)

P(X < 90) ≈ 0.8067

(d) Are any of the probabilities in parts (a)-(c) unusual? Explain.

A probability is generally considered unusual if it is less than 0.05 or greater than 0.95. Based on the calculated probabilities:

P(X = 90) ≈ 0.0391: This probability is unusual since it is less than 0.05.

P(X ≥ 90) ≈ 0.1933: This probability is not unusual.

P(X < 90) ≈ 0.8067: This probability is not unusual.

So, only the probability of exactly 90 people saying they use the Internet is considered unusual.

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In a poll of students at the football championship, 90% of the students say that football is better than basketball.

Explain why it is not a valid conclusion to say that football is more popular than basketball at school.

Suggest a better method of determining which sport is more popular.

Answers

Answer:

Part (a):  Because the survey was held at basketball championship.

Part (b): The survey among students should held at school or in any common place.

Step-by-step explanation:

Segments OT and OV are?

Answers

True, The more variables that are deployed to segment a market, the more useful is the resulting segmentation likely to be.

We have,

The factors which are be used to member a request are the segmentation variables. Common variables include demographic, geographic, psychographics and behavioral considerations.

Quantifiable population characteristics, similar as age, gender, income, education, family situation.

The primary ideal of segmentation is to identify guests with analogous attributes, and to find which parts of guests that are seductive from a profit perspective.

Understanding the request segmentation allows marketers to produce a more effective and effective marketing blend.

Hence, True, The more variables that are deployed to segment a market, the more useful is the resulting segmentation likely to be.

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complete question:

The more variables that are deployed to segment a market, the more useful is the resulting segmentation likely ot be.[See p.104]Group of answer choicesTrueFalse

#1 - The value of y varies directly with x. When y = 75, x = 4. What is the value of y when x = 2? **For your response, enter the numerical value ONLY. NO Letters & NO Spaces. ** *

Answers

The answer is 37.5.

What is the value of y when x = 2 if y varies directly with x and when y = 75, x = 4?The problem provides the information that "the value of y varies directly with x", which means that there is a constant of proportionality between y and x, denoted by k. This can be written as an equation: y = kx. To find the value of k, we can use the information given in the problem. When y = 75 and x = 4, we have 75 = k(4), which means k = 75/4. Now, we can use this value of k to find the value of y when x = 2: y = (75/4)(2) = 37.5.

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