Your literature class will read 4 novels this year, chosen by class vote from a list of 7 possible books offered by the teacher.
a) How many different ways could the course unfold, given that it probably matters what order you read the books in?
b) How many different choices of books could the class make?
a) The number of different ways the course could unfold is

Answers

Answer 1

Answer:

a) 840 different ways

b) 35 different choices of books

Step-by-step explanation:

We know that our literature class will read a total of 4 novels this year.

All novels chosen by class vote from a list of 7 possible books offered by the teacher.

Wherever we have an experiment \(''N''\) which is formed by sub - experiments that can occurred in \(m_{1},m_{2},...,m_{n}\) ways, the total number of ways in which the whole experiment \(''N''\) can be developed is :

\(m_{1}\) x \(m_{2}\) x ... x \(m_{n}\)

Then, for a) if it matters what order we read the books in, the total number of different ways could the course unfold is :

\((7).(6).(5).(4)=840\) (I)

Because for the first book there are 7 different choices. Now, given that we choose the first book, we only have 6 different choices for the second one.

Continuing with the idea, we deduce the equation (I).

For item b) :

Wherever we have \(''n''\) different objects and we want to find the ways that we can choose \(''r''\) objects from that group, we need to use the combinatorial number.

We define the combinatorial number as :

\(nCr=\left(\begin{array}{c}n&r\end{array}\right)=\frac{n!}{r!(n-r)!}\)

Then, if we apply this to the problem, the total different choices of books if we want 4 novels voting from a total of 7 possible books is :

\(7C4=\frac{7!}{4!(7-4)!}=35\)

a) 840 different ways

b) 35 different choices of books


Related Questions

The production function is used to examine the relationship between _________.
Select the correct answer below:
supply and demand
producers and consumers
price and cost
inputs and outputs

Answers

The production function is used to examine the relationship between inputs and outputs.

The production function is a fundamental concept in economics that represents the relationship between inputs and outputs in the production process. It helps us understand how much output can be produced with a given set of inputs.

In the production process, inputs such as labor, capital, raw materials, and technology are combined to produce goods or services. The production function captures the quantitative relationship between these inputs and the resulting output. It provides a framework to analyze how changes in input levels affect the output level.

The production function typically takes the form of a mathematical equation or a graphical representation. It shows how the quantity of output depends on the quantities of various inputs used in the production process.

By studying the production function, economists can analyze factors such as efficiency, productivity, and technological progress. It helps firms make decisions regarding the optimal combination of inputs to maximize output or minimize costs. Additionally, it allows policymakers to assess the impact of policies on production and economic growth.

Therefore, the production function primarily focuses on examining the relationship between inputs and outputs, rather than supply and demand, producers and consumers, or price and cost.

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Brandon was driving at a steady speed of 41 mph for 22 minutes. How far did he travel in that time?

Answers

Answer:

1320 feet i think

Step-by-step explanation:

41 mph is 60 feet a second

22 x 60 is 1320

i think this is the correct awnser

On Tuesday, Ashley walked the first dog for 27 minutes, the second dog for 35 minutes, and the third dog for 15 minutes. If she started walking the first dog at 8:00 am, what time did she finish walking all the dogs?

Answers

Answer:

9:17

Step-by-step explanation:

Answer: 9:17 am

Step-by-step explanation: I added all the minutes together and got 77 minutes. Then I simplified the 77 minutes into an hour and 17 minutes. Then I added the 1hour and 17minutes to 8:00 am.

a wheel having a diameter of 50 cm. if the elf travels a distance of 25 meters. how many revolutions did the wheel go through

Answers

Approx 16 revolutions the wheel go through to travel the distance 25 meters by a diameter of 50 cm.

In the given question, a wheel having a diameter of 50 cm.

If the elf travels a distance of 25 meters then we have to find how many revolutions did the wheel go through.

Since we have the wheel's diameter, we can determine the radius of the wheel. As we already know, the length of a wheel's revolution is equal to its circumference, which is a circle with a diameter of 2πr.

We will now enter the radius value into the algorithm to determine how many revolutions the wheel must make. To reach the desired result, divide the total distance by the distance covered in one revolution to determine the number of revolutions needed to travel 25 m.

r = \(\frac{50}{2}\) = 25 cm

The radius of the wheel is 25 cm.

Now we put the value of r in the formula of circumference.

2πr = 2π×25

2πr = 50π cm

Total distance is 25 m. So we convert m in cm by multiplying the 100.

Now the total distance is 2500 cm.

2500 = n × 50π

Now putting the value of π = 3.14

2500 = n×50 × 3.14

2500 = n×157

Divide by 157 on both side, we get

n = 15.924

n = 16(approx)

Hence, approx 16 revolutions the wheel go through to travel the distance 25 meters by a diameter of 50 cm.

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for any given event, the sum of probability of that event and the probability of its _________ Must equal one

Answers

For any given event, the sum of probability of that event and the probability of its complement must equal one.

The complement of an event is the set of all outcomes in the sample space that are not in the event. The probability of the complement of an event is the probability that the event does not occur.

Therefore, if P(A) is the probability of an event A, then P(A') is the probability of the complement of A, and we have: P(A) + P(A') = 1

This is known as the complement rule of probability and is a fundamental principle in probability theory. It states that the sum of the probabilities of an event and its complement must equal one, which reflects the fact that either the event occurs or its complement occurs, but not both.

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A bell tolls every 30 minutes on the hour and at half past the hour. How many times does the bell toll between the times of 11.45 am and 3.10 pm?​
Please show solutions!!!!

Answers

Answer:

7

Step-by-step explanation:

If the bell tolls every 30mins on the hour and at half past the hour, then the bell will toll at 12 noon, 12:30pm, 1pm, 1:30pm, 2pm, 2:30pm and 3pm which is 7 times.

i hope is help

OFFERING BRAINLIEST IF YOU ARE THE FASTEST!

OFFERING BRAINLIEST IF YOU ARE THE FASTEST!

Answers

To find out how many sugar cubes can fit in the given box, we need to determine the volume of the box and the volume of each sugar cube, and then divide the volume of the box by the volume of each sugar cube.

The volume of the box is:

V_box = l x w x h = 2.5 cm x 1 cm x 2 cm = 5 cm^3

The volume of each sugar cube is:

V_cube = s^3 = (0.5 cm)^3 = 0.125 cm^3

To find out how many sugar cubes can fit in the box, we divide the volume of the box by the volume of each sugar cube:

number of cubes = V_box / V_cube = 5 cm^3 / 0.125 cm^3 = 40 cubes

Therefore, 40 sugar cubes can fit in the given box.

find the area of the surface. the part of the surface z = 5 5x 3y2 that lies above the triangle with vertices (0, 0), (0, 1), (2, 1).

Answers

To find the area of the surface z = 5 + 5x + 3y^2 above the triangle with vertices (0, 0), (0, 1), and (2, 1), we need to use the surface integral formula.

First, calculate the partial derivatives with respect to x and y:
∂z/∂x = 5
∂z/∂y = 6y

Now, compute the magnitudes of the cross product of the gradient vectors:
|∂z/∂x × ∂z/∂y| = √((5^2) + (6y)^2) = √(25 + 36y^2)

The area of the surface can be found using the double integral of the magnitudes over the triangle:
Area = ∬(√(25 + 36y^2)) dA

We'll use the triangle's vertices to set the integration limits for x and y:
x: 0 to 2 - y
y: 0 to 1

Area = ∫(y=0 to 1) ∫(x=0 to 2-y) (√(25 + 36y^2)) dx dy

Evaluating this integral will provide the area of the surface above the given triangle.

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4.In a right triangle, the sine of one
acute angle is equal to the
____ of the other acute angle.
A.)cosine
B.)sine
C.)tangent

Answers

Answer:c

Step-by-step explanation:

In A Time Of T Seconds, A Particle Moves A Distance Of S Meters From Its Starting Point, Where S = (2t - 1)². For The Following

Answers

For the given situation where the particle moves a distance of S meters from its starting point in a time of T seconds, with S = (2t - 1)², we can analyze the motion of the particle.

The equation S = (2t - 1)² represents a parabolic path. The vertex of the parabola occurs when 2t - 1 = 0, which gives t = 1/2. This means that at t = 1/2, the particle reaches its maximum displacement from the starting point.

Since the equation represents a parabola, the particle's displacement is symmetric about its maximum point. In other words, when t is greater than 1/2, the particle moves back towards its starting point along the same path it took initially.

Therefore, the particle moves away from its starting point until t = 1/2, reaching its maximum displacement, and then returns towards its starting point for t values greater than 1/2.

The equation S = (2t - 1)² provides a mathematical description of the distance traveled by the particle at any given time, allowing us to analyze its motion throughout the specified time interval.

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Find The Total Differentials Of The Following Utility Functions. A. U(X,Y)=Xαyβ B. U(X,Y)=X2+Y3+Xy

Answers

A. The total differential of the utility function U(X,Y) = X^αY^β is dU = αX^(α-1)Y^β dX + βX^αY^(β-1) dY.

B. The total differential of the utility function U(X, Y) = X^2 + Y^3 + XY is dU = (2X + Y) dX + (3Y^2 + X) dY.

A. The total differential of a function represents the small change in the function caused by infinitesimally small changes in its variables. In this case, we are given the utility function U(X, Y) = X^αY^β, where α and β are constants.

To find the total differential, we differentiate the utility function partially with respect to X and Y, and multiply the derivatives by the differentials dX and dY, respectively.

For the partial derivative with respect to X, we treat Y as a constant and differentiate X^α with respect to X, which gives αX^(α-1). We then multiply it by the differential dX.

Similarly, for the partial derivative with respect to Y, we treat X as a constant and differentiate Y^β with respect to Y, resulting in βY^(β-1). We then multiply it by the differential dY.

Adding these two terms together, we obtain the total differential of the utility function:

dU = αX^(α-1)Y^β dX + βX^αY^(β-1) dY.

This expression represents how a small change in X (dX) and a small change in Y (dY) affect the utility U(X, Y).

B. To find the total differential of the utility function U(X, Y) = X^2 + Y^3 + XY, we differentiate each term of the function with respect to X and Y, and multiply the derivatives by the differentials dX and dY, respectively.

For the first term, X^2, we differentiate it with respect to X, resulting in 2X, which is then multiplied by dX. For the second term, Y^3, we differentiate it with respect to Y, resulting in 3Y^2, which is multiplied by dY. Finally, for the third term, XY, we differentiate it with respect to X and Y separately, resulting in X (multiplied by dY) and Y (multiplied by dX).

Adding these three terms together, we obtain the total differential of the utility function:

dU = (2X + Y) dX + (3Y^2 + X) dY.

This expression represents how a small change in X (dX) and a small change in Y (dY) affect the utility U(X, Y).

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How can you solve standard form and intercept form?

Answers

Answer:

The standard form of such an equation is Ax + By + C = 0 or Ax + By = C. When you rearrange this equation to get y by itself on the left side, it takes the form y = mx +b. This is called slope intercept form because m is equal to the slope of the line, and b is the value of y when x = 0, which makes it the y-intercept.

Step-by-step explanation:


Bob and Cheryl are taking a road trip that is 183.60 miles Bob drove 3/4 of the total distance.

How many miles did Bob drive?

Answers

Answer: 137.7

Explanation: I divided the total miles by 4.
That gave me 45.9, then I multiplied that (45.9) by 3.

If f(1)=3f(1)=3 and f(n)=f(n-1)^2-3f(n)=f(n−1) 2 −3 whatsthe value of f(4)f(4)

Answers

Answer:

Step-by-step explanation:

So you can do that for me and you have a lot to say I don’t want you have a lot

Through ten games of basketball this season, Jaxson has made 81% of his free- throws. Which word or phrase describes the probability that Jaxson will hit his next free throw?​

Answers

The word or phrase that describes the probability that Jaxson will hit his next free throw is "likely" or "high probability".

Based on the information given, Jaxson has made 81% of his free throws in the past ten games. This indicates a high success rate, as he has made a significant majority of his attempts. Therefore, it is reasonable to expect that he will continue to perform at a similar level and have a high likelihood of making his next free throw.

It's important to note that probability is a measure of the likelihood of an event occurring. In this case, Jaxson's past performance serves as an indicator of his skill and consistency in making free throws. While there is always a small degree of uncertainty in individual outcomes, the high success rate observed over multiple games suggests that he has developed the necessary skill and technique to consistently make free throws. Thus, it is reasonable to expect a high probability of success for his next free throw.

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y varies directly as x and inversely as z. y=100 when x=5 and z=10. Find y when x=3 and z=60.

Answers

Answer:

10

Step-by-step explanation:

Formula you are going to use: \(y=\frac{kx}{z}\)

you will use k to help you resolve for y :)

\(y=\frac{kx}{z}\)\(100=\frac{5k}{10}\)\(100=\frac{k}{2}\) (multiply by 2 to cancel the fraction)200 = k

Now you will replace k with 200 :)

\(y=\frac{kx}{z}\)\(y=\frac{3(200)}{60}\)\(y=\frac{600}{10}\)y = 10Hope it helps you  \(:)\)

Without doing any calculations, describe what would happen to the confidence interval if we used a larger sample.(select all that apply)
A. widen the interval
B. narrow the interval
C. the interval would not change
D. increase margin of errorE. decrease margin of error

Answers

If the sample size were smaller, the margin of error would be larger. So, a larger sample size would lead to a narrower confidence interval (i.e., a more precise estimate of the population parameter). In contrast, a smaller sample size would lead to a wider confidence interval (i.e., a less precise estimate of the population parameter).

As the sample size gets larger, the margin of error decreases.

Explanation:A confidence interval is a range of values that are likely to contain an unknown population parameter. It is often used to provide a measure of the precision of a sample estimate (i.e., how much the sample estimate is likely to vary from the true value of the population parameter).The margin of error is the extent to which a sample statistic (e.g., mean, proportion) differs from the true population parameter. The margin of error decreases as the sample size increases. That is, as the sample size gets larger, the range of values that the sample estimate is likely to be is narrower. Conversely, as the sample size gets smaller, the range of values that the sample estimate is likely to be is wider.For example, suppose a researcher wants to estimate the average height of all college students in the United States. They take a random sample of 100 students and find that the sample mean height is 5’8”. They also find that the standard deviation of the heights in the sample is 3”. Using this information, they can construct a 95% confidence interval for the population mean height of college students in the United States. Let us say the confidence interval is from 5’6” to 5’10”.The margin of error is calculated by subtracting the lower bound of the confidence interval from the upper bound of the confidence interval and dividing by two. So, in this case, the margin of error is (5’10” – 5’6”)/2 = 2”.If the sample size were larger, the margin of error would be smaller.

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Draw the image of the following triangle after a dilation centered at the origin with a scale factor of 2.
1
1
Х
5
V
Check

Draw the image of the following triangle after a dilation centered at the origin with a scale factor

Answers

I really don’t know but I guess 2

larry wants new carpeting for rectangular living room. Her living room is 18 feet by 12 feet. How much carpeting does she need?

Answers

\(\text{To get the total surface area, all we have to do is multiply } 18 \text{ by } 12, \text{which gets us}\)\($18\cdot12 = \boxed{216\text{ ft}^2}\).

\(\text{So, our answer is } \boxed{216\text{ ft}^2}.\)

Larry needs 216 square feet of carpeting for her rectangular living room.

To find the amount of carpeting Larry needs, we need to calculate the area of her rectangular living room. The area of a rectangle can be found by multiplying its length by its width. In this case, the length of the living room is 18 feet and the width is 12 feet.

So, the area of the living room is:

Area = Length * Width

Area = 18 feet * 12 feet

Area = 216 square feet

Therefore, Larry needs 216 square feet of carpeting for her living room.

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What is the value of $n$ such that $10^n = 10^{-5}\times \sqrt{\frac{10^{73}}{0. 001}}$?

Answers

The value of n is 20.

How to determine the variable in an exponential function ?

Given the exponential function expressed as:

\(10^n=10^-^5\sqrt{\frac{10^7^3}{0.001} }\)

This can be further expressed as:

\(10^n=10^-^5\sqrt{\frac{10^7^3}{10^-^3} }\)

\(10^n=10^-^5\sqrt{10^7^610^n=10^4.10^1^9}\)

Since the use are equal, add the exponents

\(10^n=10^4^+^1^9\)

\(10^n=10^2^3\)

\(n=23\)

Hence, the value of n is 20.

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What’s the domain using inequalities for this graph? I’ll give you brainiest

Whats the domain using inequalities for this graph? Ill give you brainiest

Answers

Answer:

Hi there!

Your answer is:

X is between -4 and +infinity

Step-by-step explanation:

The open circle indicates that it CANNOT be -4, but it has to be greater than it. The arrow indicates that it goes on permanently

Hope this helps

PLEASE HELP!!

Also the last option is

4 units left and 3 units down

PLEASE HELP!! Also the last option is 4 units left and 3 units down

Answers

Answer:

B

Step-by-step explanation:

pleaseee help me w dis!!! marking brainiest!!!

pleaseee help me w dis!!! marking brainiest!!!

Answers

Answer:

x = -8  x=1

Step-by-step explanation:

x^2 +7x = 8

Subtract 8 from each side

x^2 +7x -8 =0

Factor

What 2 numbers multiply to -8 and add to 7

8*-1 = -8

8+-1 = 7

(x+8)(x-1) =0

Using the zero product property

x+8 =0  x-1 =0

x = -8  x=1

43. Suppose g(x)=x 2 f(x) and it is known that f(2)=3 and f ′(2)=−1. Evaluate g ′(2)

Answers

The derivative g'(2) of the function g(x) = x^2 * f(x), where f(2) = 3 and f'(2) = -1, is equal to 8.

To evaluate g'(2), we need to find the derivative of the function g(x) = x^2 * f(x) and then substitute x = 2 into the derivative.

First, let's find the derivative of g(x) using the product rule. The product rule states that if we have two functions u(x) and v(x), then the derivative of their product is given by:

(d/dx)(u(x) * v(x)) = u'(x) * v(x) + u(x) * v'(x)

In this case, u(x) = x^2 and v(x) = f(x). Taking the derivatives, we have:

u'(x) = 2x  (derivative of x^2)

v'(x) = f'(x) (derivative of f(x))

Applying the product rule, we get:

g'(x) = (d/dx)(x^2 * f(x)) = 2x * f(x) + x^2 * f'(x)

Now, we can substitute x = 2 into g'(x) to evaluate g'(2):

g'(2) = 2(2) * f(2) + (2^2) * f'(2)

Given that f(2) = 3 and f'(2) = -1, we can substitute these values into the equation:

g'(2) = 2(2) * 3 + (2^2) * (-1)

Simplifying:

g'(2) = 4 * 3 + 4 * (-1)

g'(2) = 12 - 4

g'(2) = 8

Therefore, g'(2) = 8.


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the sum of 2 times a number and 3 times another number is 4. The first number minus the second number is -3. what are the numbers?​

Answers

Answer:

A=-1, B=2

Step-by-step explanation:

2a + 3b=4 equation 1

a-b=-3 equation 2

a=-3+b isolate a in equation 2

2(-3+b) + 3b=4. Substitute value of a in equation 2 (-3+b) into a value of  equ 1

-6+2b+3b=4

5b=10

b=2

solve for a:

a-b=-3

a-(2)=-3

a-2=-3

a=-1

As a general rule in computing the standard error of the sample mean, the finite population correction factor is used only if the:
Group of answer choices
1. sample size is more than half of the population size.
2. sample size is smaller than 5% of the population size.
3. sample size is greater than 5% of the sample size.
4. None of these choices.

Answers

The finite population correction factor is used in computing the standard error of the sample mean when the sample size is smaller than 5% of the population size.

The finite population correction factor is a adjustment made to the standard error of the sample mean when the sample is taken from a finite population, rather than an infinite population.

It accounts for the fact that sampling without replacement affects the variability of the sample mean.

When the sample size is relatively large compared to the population size (more than half), the effect of sampling without replacement becomes negligible, and the finite population correction factor is not necessary.

In this case, the standard error of the sample mean can be estimated using the formula for sampling with replacement.

On the other hand, when the sample size is small relative to the population size (less than 5%), the effect of sampling without replacement becomes more pronounced, and the finite population correction factor should be applied.

This correction adjusts the standard error to account for the finite population size and provides a more accurate estimate of the variability of the sample mean.

Therefore, the correct answer is option 2: the finite population correction factor is used when the sample size is smaller than 5% of the population size.

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in a recently published sociology article about transportation patterns, a sociologist studied whether families rely on their own transportation instead of public transportation. let the mean number of cars owned by a family be μ. if the sociologist wanted to know if families own, on average, more than 3 cars, what are the null and alternative hypotheses?

Answers

The null hypothesis is \(H_0:\mu=3\) and the alternative hypothesis is \(H_1:\mu > 3\)

There are two hypothesis considered in a statistical test. They are:

Null hypothesis (\(H_0\))Alternative hypothesis (\(H_1\))

Formulation of null and alternative hypothesis are considered as the first step of a statistical procedure. The whole procedure, then, continues on testing whether to accept or reject these hypotheses.

Null Hypothesis is the actual hypothesis which is tested. Alternative hypothesis, as its name suggests, is the hypothesis accepted when the null hypothesis is rejected in the test carried out.

Here the sociologist is carrying out the test on the mean number of cars, \(\mu\).

So to check whether the families own more than 3 cars in average,

the null hypothesis will be ,\(\bold{H_0:\mu=3}\)  

and the alternate hypothesis will be,  \(\bold{H_1:\mu > 3}\)

So if the null hypothesis is rejected, then there is the possibility for only more than 3 cars in average.

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Consider the two triangles. Triangles A B C and H G I are shown. Angles A C B and H I G are right angles. The length of side A C is 15 and the length of side C B is 20. The length of side H I is 12 and the length of I G is 9. To prove that the triangles are similar by the SAS similarity theorem, it needs to be shown that...

AngleC congruent AngleC
AngleC congruent AngleG
AC/GI = HI/BC
AC/GI = BC/HI

Consider the two triangles. Triangles A B C and H G I are shown. Angles A C B and H I G are right angles.

Answers

To prove that the triangles are similar by the SAS similarity theorem, it needs to be shown that AC/GI = BC/HI.

Similarity theorem of triangle

Figures are known to be similar if the ratio of their similar sides is equal or their angles are equal.

From the given diagram, triangle ABC will be congruent to GHI if the ratio below is true.

AC/BC = GI/HI

This can also be written as AC/GI = BC/HI. Hence to prove that the triangles are similar by the SAS similarity theorem, it needs to be shown that AC/GI = BC/HI.

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what is 28.5 inches in height?

Answers

two feet and 4.5 inches

Which point is not on the graph of the function y=×+5

Answers

Answer:

your gonna need to start from the point 5 and move up

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