The probability that a student guesses the correct answer to a five​-choice multiple choice question is ​P(correct)=0.2. How many correct answers should a student expect to guess on a test with 60 ​five-choice multiple choice​ questions?

Answer:4.1

Step-by-step explanation:

Set is the collection of objects with defined property and represented in curly brackets {} . Example: A = { 2, 4, 6 }.

Set is defined as:

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The formula for a prism is as follow,

The surface area of a prism = (2×Base Area) +Lateral Surface Area

The volume of a prism =Base Area× Height

A prism is a solid whose perimeter is defined by a number of congruent parallel plane polygons, two of which are known as the ends, and two of which are known as the side faces.

The polyhedron known as a prism has two parallel polygonal bases. A prism is a transparent optical device with flat, polished surfaces that refract light. The two polygonal bases are connected by their lateral faces. Longitudinally, the faces are primarily rectangular. It could even be a parallelogram occasionally.

The surface area of a prism is made up of the combined areas of the lateral faces and the two polygonal bases.

The total area that a prism takes up in three dimensions is known as its volume.

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A multiplicity example in mathematics is when a function has multiple solutions to a given equation.

For example, when solving the equation x2 + 4x + 3 = 0, there are two solutions, x = -3 and x = -1. This means that the equation has a multiplicity of two. This can be seen in the graph of the equation, which has two points of intersection on the x-axis.

The multiplicity is a measure of how many solutions a given equation has. It can be determined by using the discriminant, which is the difference between the square of the coefficient of the highest degree term, and four times the product of the coefficients of the lower degree terms, and the constant. In the example above, the discriminant is 16 - 12, which is 4. The multiplicity of the equation is determined by the sign of the discriminant: if it is positive, the equation has two solutions; if it is zero, the equation has one solution; and if it is negative, the equation has no solutions.

The multiplicity of an equation can also be used to determine the nature of the graph of the equation. If the equation has a multiplicity of two, the graph is a parabola, which is a curved line that has two points of intersection on the x-axis. If the equation has a multiplicity of one, the graph is a line, which has only one point of intersection on the x-axis. If the equation has a multiplicity of zero, the graph is a circle, which has no points of intersection on the x-axis.

The concept of multiplicity is important in mathematics, as it can be used to determine the number of solutions an equation may have, as well as the nature of the graph of the equation. Knowing the multiplicity of an equation can help to simplify the process of solving the equation.

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If we answer yes, then 1, 2, 3, 4, and 5. No phrase is used more than once in this passage. Therefore, there is currently no most prevalent phrase. Thus, this data does not contain a mode.

The mode calculation is a rather simple process. Organize the numbers in a set in whatever order—from lowest to highest as well as highest to lowest—and then tally the frequency with which each number appears in the group. The mode is the one that shows up most frequently.

When the mean, as well as median, as well as median cannot be employed, the mode informs us of the most prevalent value in categorical data. The mode provides insight into the location of a dataset's "center".

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120 m³ is cubic meters is the shed.

Given :

What in math is a cube?

The term "cube" refers to a solid three-dimensional shape in mathematics or geometry that has six square faces, eight vertices, and twelve edges. Also said to be a conventional hexahedron. Due to the fact that a cube is three dimensional, the space it occupies will also be three dimensional.

Six square faces surround a cube, hence combining the areas of all six square faces will yield the surface area. The cube formula's surface area is as a result. Cube surface area equals 6 (sides).

w = 6 m

l = 4 m

h = 5 m

a rectangular shed = 6 * 4 * 5

= 120 m³

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Step-by-step explanation:

The committee should sell adult tickets for $10 and child tickets for $5 to raise $1,440 from ticket sales.

Let x be the price of adult tickets in dollars and y be the price of child tickets in dollars. We can set up the following system of equations to represent the given information:

x + y = 300 (the total number of tickets sold)

180x + 120y = 1440 (the total amount of money raised)

x = 2y (the price of adult tickets is twice the price of child tickets)

Substituting the third equation into the first equation, we get:

2y + y = 300

3y = 300

y = 100

Substituting this value for y into the third equation, we get:

x = 2*100

x = 200

Substituting these values for x and y into the second equation, we get:

180200 + 120100 = 1440

This equation is true, so the solution x = $200 and y = $100 is valid. Therefore, the committee should sell adult tickets for $10 and child tickets for $5 to raise $1,440 from ticket sales.

Answer: -1/34

Step-by-step explanation:

Answer:

f(134) = 9

Step-by-step explanation:

substitute x = 134 into f(x) and evaluate

f(x) = 10 - [tex]\frac{x}{134}[/tex] , then

f(134) = 10 - [tex]\frac{134}{134}[/tex] = 10 - 1 = 9

The values of the expressions are P 9, 3 = 504, C 9, 3 = 84, P 8, 8 = 40320 and C 9, 9 = 1

From the question, we have the following parameters that can be used in our computation:

(A) P9, 3. (B) C9, 3. (C) P8, 8. (D) C9, 9.

The above expressions are permutation and combination expressions

Using the above as a guide, we have

Expression (A) P9, 3

Apply the permutation formula

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

So, we have

P 9, 3 = 9!/6!

Evaluate

P 9, 3 = 504

Expression (B) C 9, 3

Apply the combination formula

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

So, we have

C 9, 3 = 9!/(6! * 3!)

Evaluate

C 9, 3 = 84

Expression (C) P8, 8

Apply the permutation formula

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

So, we have

P 8, 8 = 8!/0!

Evaluate

P 8, 8 = 40320

Expression (D) C 9, 9

Apply the combination formula

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

So, we have

C 9, 9 = 9!/(9! * 0!)

Evaluate

C 9, 9 = 1

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Applying derivative on the formula of volume of cone and using the provided values, The answer is 0.059 feet per minute.

The rate at which a function changes in relation to a variable in mathematics.

A cone is a three-dimensional geometric structure with a smooth transition from a flat base often but not always circular to the point at the top, also known as the apex or vertex.

Formula for volume of cone is:

[tex]V= \pi r^{2}\frac{h}{3}[/tex]

derivate the formula for volume of cone , we get,

[tex]\frac{dV}{dt} = 2\pi r * \frac h3 * \frac {dr}{dt}[/tex]

dV / dt = 3

r=2

h=12

dr/dt = 0.059 feet per minute.

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Answer:

372 miles

Step-by-step explanation:

You need to multiply 62 and 6

Answer:

The car will travel 434 miles in 7 hours.

Step-by-step explanation:

To get the answer you simply need to multiply 62, which is the speed of the car, by 7 hours, how long it will travel.

Therefore, the answer is 434 miles.

The nature of the roots of the quadratic equation 4x² - 5x + 3 is complex.

Polynomial is an equation written as the sum of terms of the form kx^n.

where k and n are positive integers.

We have,

4x² - 5x + 3

This is in the form of ax² + bx + c

a = 4

b = -5

c = 3

Now,

D = b² - 4ac

If D < 0 there will be complex roots.

Now,

D = (-5)² - 4 x 4 x 3 = 25 - 48 = -23

D < 0

This means,

The roots are complex.

Thus,

The equation has complex roots.

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After the pumping is complete, the volume of the empty space inside container [A] will be 1147.72 ft³.

        v{c} = πr²h = π(d/2)²h

Given are two containers designed to hold water are side by side, both in the shape of a cylinder. Container A has a diameter of 12 feet and a height of 19 feet. Container B has a diameter of 14 feet and a height of 13 feet. Container A is full of water and the water is pumped into Container B until Container B is completely full.

Volume of container [A] -

V{A} = (22/7) x (12/2)² x 19

V{A} = (22/7) x 6 x 6 x 19

V{A} = 3149.72 ft³

Volume of container [B] -

V{A} = (22/7) x (14/2)² x 13

V{A} = (22/7) x 7 x 7 x 13

V{B} = 2002 ft³

V{A} - V{B} → Empty space =  3149.72 ft³ -  2002 ft³ = 1147.72 ft³

Therefore, the free space inside the container A will be 1147.72 ft³.

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Answer:

-1

Step-by-step explanation:

I got -1 by getting two points from the graph where the line touches. The two points I got were (0,-3) and (1, -4). When it asks you to find the domain it's asking you to find for the slope. The domain and the slope are the same thing. To find slope you use the slope formula which is y2-y1 over x2-x1. Once you set up your equation you should get -4-(-3) over 1-0. When you solve it you should get -1/1 and -1 divided by 1 is -1. So then the slope is -1....
(hope you were able to understand it... I might've not chosen the right points but hopefully I did...I'm sorry if you get it wrong)

On solving the provided question, we can say that - the maximum value or maxima of the given function is 36.

Maximum describes a high point (plural maxima). The term "minimum" refers to a low point (plural minima). Extremum is the Latin term used to describe the greatest or minimum (plural extrema). When greater points are possible elsewhere but not close by, we say local maximum (or minimum). The greatest and smallest values of a function in either a specified range or throughout the whole domain are referred to as a function's maxima and minima, generally known as extrema, in mathematical analysis.

The vertex is used to determine that the function's maximum value is 36.

Function is provided by:

f(x) = [tex]16x^2 + 32x + 20[/tex]

coefficients  -

[tex]a = -16, b = 32 , c =20[/tex]

[tex]f_{max} = \frac{32^2 - 4(-16)(20)}{4(-16)}[/tex] = 36

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Random variable contains the random outcome of an event in probability, The mean and standard deviation are calculated in terms of expected values E(x) in case of random variable.

The mathematical formalization of a number or object that is subject to chance events is known as a random variable. It is a function or mapping between a space of potential outcomes, commonly real numbers, to a space of measurement.

The arithmetic mean, also known as the arithmetic average or simply the mean or average, is the sum of a set of numbers divided by the total number of numbers in the set. The collection frequently consists of a series of findings from a survey, experiment, or observational study.

The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers. While a high standard deviation suggests that the values are dispersed throughout a wider range, a low standard deviation suggests that the values tend to be close to the established mean.

for a random variable, we use expected value for mean and standard deviation.

mean = E(X)

Standard deviation = [tex]\sqrt {variance} =\sqrt {E(X^{2})-(E(X)^{2})}[/tex]

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It will take 180 Hours to fill the pool if both hoses are used.

In our question, one data is missing. You require the pool's volume or some information that enables you to calculate it. The same statement given by you is part of a problem where you know a series of data that shows the time required to fill the pool at different flow rates:

flow rate           time

60 gal/h            300 h => 60 gal/h * 300 h = 18,000 gal

45 gal/h            400 h => 45 gal/h * 400 h = 18,000 gal

36 gal/h            500 h => 36 gal/h * 500 h = 18,000 gal

30 gal/h            600 h => 30 gal/h * 600 h = 18,000 gal

So for this pool to calculate (several times) that the volume is 18,000 gal.

You now possess two hoses, one of which has a flow rate of 40 gals per hour and the other of which has a flow rate of 60 gals per hour.

The total flow rate is the sum of the two flow rates"

total flow rate = 40 gal/h + 60 gal/h = 100 gal/h

And you just must divide the volume of the pool (18,000 gals) by the total flow rate (100 gal/h) to get the time to fill the pool:

time = volume / flow rate = 18,000 gal / 100 gal/h = 180 hours.

So, finally, our answer to fill the pool will be about 180 hours.

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flow rate           time

60 gal/h            300 h => 60 gal/h * 300 h = 18,000 gal

45 gal/h            400 h => 45 gal/h * 400 h = 18,000 gal

36 gal/h            500 h => 36 gal/h * 500 h = 18,000 gal

30 gal/h            600 h => 30 gal/h * 600 h = 18,000 gal

So for this pool to calculate (several times) that the volume is 18,000 gal.

You now possess two hoses, one of which has a flow rate of 40 gals per hour and the other of which has a flow rate of 60 gals per hour.

The total flow rate is the sum of the two flow rates"

total flow rate = 40 gal/h + 60 gal/h = 100 gal/h

And you just must divide the volume of the pool (18,000 gals) by the total flow rate (100 gal/h) to get the time to fill the pool:

time = volume / flow rate = 18,000 gal / 100 gal/h = 180 hours.

The correct statements of the given statements are -

Function : In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y. The set X is called the domain of the function and the set Y is called the codomain of the function

Expression : A mathematical expression is made up of terms (constants and variables) separated by mathematical operators

Equation : A mathematical equation is used to equate two expressions.

Given is the distance of the elevator from the ground in floors.

Therefore, the correct statements of the given statements are -

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Here we can say that - A series of integers can be generated over time using the range() method.

Range: the discrepancy between the top and bottom numbers. To get the range, locate the greatest observed value of the variable and deduct the least observed value the minimum. The data points between the two extremes of the distribution are not taken into consideration by the range; just these two values are considered. Between the lowest and greatest numbers, there is a range. Values at the extremes make up the range. The data set 4, 6, 10, 15, 18, for instance, has a range of 18-4 = 14, a maximum of 18, a minimum of 4, and a minimum of 4.

given,

20, 25, 30, 45, 55, 90, 110,115,120

so range will be 120 - 20 = 100

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answer: "approximately nine years

explanation : if an investment scheme promises an 8% annual compounded rate of return, it will take approximately nine years (72 / 8 = 9) to double the invested money.

hope this helps!!

Answer:

To calculate the interest earned on a savings account, you first need to determine the interest rate per year and the time the money is invested. In this case, the interest rate is 4.5% and the time is 2 years.

The formula for simple interest is I=Prt, where I is the interest earned, P is the principal (the initial amount invested), r is the interest rate, and t is the time. Plugging in the values from the problem, we get I = 1250 * 0.045 * 2 = $112.50.

Therefore, Ethan will earn $112.50 in interest after 2 years if he does not add or withdraw any money from the account. Rounded to the nearest cent, this is $112.00.

Step-by-step explanation:

The median price of the houses sold will be equal to $171000 and yes, the mean price is greater than the median price of the houses.

Mean in mathematics is a quantity that falls somewhere between the extremes of a set. There are different types of meanings, and how they are calculated relies on the connection that is known about or is believed to control the other members.

a.

The median of given prices will be,

Let's arrange the given prices in ascending order,

161000, $165000, $168000, $171000, $174000, $178000, $240000

Then, the middle term is the median,

So, median = $171000

b.

Number of terms = 7

The mean of the given prices will be,

(171000 + 165000 + 178000 + 161000 + 174000 + 168000 +240000)/7

= 1257000/7

Mean = 179571.4286

Comparing mean and median, the mean price is greater than the median.

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The inverse of the function that is provided is calculated using the inverse function calculator. When a function, f(x), is given, its inverse, x=f(y), is calculated by switching the variables ( y ).

Given,

Inverse function;

An inverse in mathematics is a function that "undoes" another function. In other words, if f(x) produces y, then y entered into the inverse of f produces x. An invertible function is one that has an inverse, and the inverse is represented by the symbol f1.

Inverse function calculator;

The calculator for inverse functions determines the inverse of the supplied function. If a function, f(x), is supplied, then the inverse of the function, x=f(y), is determined by exchanging the variables ( y ).

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11.81 is the required mean of the given data set.

The mean (also known as the arithmetic mean, which varies from the geometric mean) of a dataset is calculated as the sum of all values divided by the total number of values.

This measure of central tendency is usually referred to as the "average".

Thus, the data set is as follows:

12, 20, 8, 15, 16, 14, 7, 5, 11, 8, 14

Mean formula: Sum of terms / Number of terms

The mean will now be determined as follows:

Mean: Sum of terms / Number of terms

Mean: 130/11

Mean: 11.81

Therefore, 11.81 is the required mean of the given data set.

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The area of the flag is 32 in²  

The right-angled triangle that has two equal sides is known as the Isosceles right triangle. In other words, if an Isosceles triangle has two equal sides then the triangle is said to be an Isosceles right triangle.  

The formula for the Area of an Isosceles right triangle is given by  

Where x is the equal sides of the triangle.

Here we have

The equal side of a right-angle triangled Flag is 8 inches

=> As we know Area right-angle triangle =  x²/2      

Area of the flag = 8²/2

= 64/2 = 32 inch²    

Therefore,

The area of the flag is 32 in²  

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The roots of the given equation are real and distinct because the value of b2-4ac is greater than 0

where a, b, and c are the coefficients in the standard form of the quadratic equation ax²+bx+c=0

Given quadratic equation is 2x²-6x+3=0  on comparing with the standard form of the quadratic equation ax²+bx+c=0

We have a=2, b=(-6) ,c=3

Hence b²-4ac,

Here b²-4ac is also known as discriminant.

=(-6)²-(4×2×3)

=36-24

=12≥0

12 (Twelve) is obviously greater than zero (0)

here value of b²-4ac>0

Hence the nature of the roots of the given equation is real and distinct.

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Question

What is the nature of roots of 2x²- 6x+ 3= 0?

The numbers which are divisible by 3 are countless. We determine it by the divisibility rules.

A number is called divisible by others whenever it is divided properly and   obtain a whole number as an outcome. As example 125 can be divided by 5 and we get the whole number 25 so 125 is said divisible by 5.

On the other hand, 225 cannot be divided by 10 and we get a decimal number. So, 225 is not divisible by 10.

A number is said to be divisible by 3 if the sum of the digits is divided by 3. Suppose we are given two number 308 and 492.

At first, we will sum the digit of each number, 3+0+8 = 11

the sum of the digit of 492 = 4+9+2 = 15

we cannot divide 11 by 3 but 15 is divided by 3. Hence, 492 is divisible by 3.

So, there are countless number which are divisible by 3.

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It is difficult to accurately estimate the values of fx and fy at point B without more information. In order to estimate the values of the partial derivatives at a point, you typically need to have a contour map or some other representation of the function in the neighborhood of that point.

A contour map is a graphical representation of a function that shows the values of the function at different points in the xy plane. The lines on the map, called contour lines, represent the values of the function, and the spacing between the lines indicates the rate of change of the function.

To estimate the values of the partial derivatives at a point using a contour map, you can:

For example, to estimate fx at point B, you could:

Without a contour map or other representation of the function in the neighborhood of point B, it is not possible to accurately estimate the values of fx and fy.

Since the question is incomplete and there is no similar one found, the answer is general.

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