given a population with a normal distribution, a mean of 40, and a standard deviation of 15, find the probability of a value between 50 and 70​

The volume of the prism is 115.5 cubic centimeters.

A three-dimensional structure called a right rectangular prism has six rectangular faces, each of which has four right angles. The length, breadth, and height of a right rectangular prism are perpendicular to one another, and the opposing sides are congruent and parallel to one another. The prism's dimensions—also referred to as its length, breadth, and height—can be utilised to determine its volume. Multiplying the prism's length, width, and height yields the volume of a right rectangular prism.

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

Volume = Length x Width x Height

Substituting the values we have:

Volume = 3.5 cm x 6 cm x 5.5 cm

Volume = 115.5 cubic centimeters

Hence, the volume of the prism is 115.5 cubic centimeters.

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Answer:

Therefore, the value of the unknown base is n = 16.

Step-by-step explanation:

Using the definition of logarithms, we have:

log_n(1/4) = -1/2

This equation can be rewritten as:

n^(-1/2) = 1/4

To solve for n, we can raise both sides to the -2 power:

n^(-1/2)^(-2) = (1/4)^(-2)

n = 16

Therefore, the value of the unknown base is n = 16.

The study that we have here is an observational study. The study is not retrospective in nature.

This study is observational because the researchers are observing and collecting data on a group without manipulating any variables.

It is not a retrospective study because the data is collected in real-time during the first year of college, rather than looking back on past experiences.

Therefore, there are no treatment or control groups, and there is no need for blinding. The study simply reports the percentage of first-year women students who experienced sexual assault during their first year at the regional college.

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Answer:

2.700 × 10-7

Step-by-step explanation:

Answer:  2.7*10^-4

step by step explanation:

1. Make the number a new number between 1 and 10

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Move the decimal point to make 0.00027 a new number between 1 and 10. Because our original number is less than one, we move the decimal point to the right. Drop any zeroes in front of the number. Keep track of how many times we move the decimal point.

0.00027 -> 2.7

Our new number is 2.7. We moved the decimal point 4 times.

2. Define the power of 10

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Because our original number was less than one, the exponent defining the power of 10 is negative. Remember, we moved the decimal point 4 times, so the exponent is negative 4

10^(-4)

3. Final result

2.7*10^(-4)

Answer: The linear equation in slope-intercept form that models this situation is:

y = 37x + 85

In this equation, the variable x represents the time spent repairing the vehicle in hours.

The variable y represents the total cost of the repair in dollars.

Step-by-step explanation:

Triangle ABC is congruent to triangle PQR, where A corresponds to P, B corresponds to Q, and C corresponds to R.

What is congruency?

In geometry, two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other.

To write a congruence statement for two triangles, we need to identify their corresponding parts and ensure that they are congruent in both triangles.

The congruence statement can be written in the following form:

Triangle ABC is congruent to triangle PQR, where A corresponds to P, B corresponds to Q, and C corresponds to R.

For example, if we have two triangles with vertices A, B, and C and P, Q, and R respectively, and we know that the following pairs of corresponding parts are congruent:

AB ≅ PQ

BC ≅ QR

AC ≅ PR

Then, we can write the congruence statement as:

Hence, Triangle ABC is congruent to triangle PQR, where A corresponds to P, B corresponds to Q, and C corresponds to R.

The symbol ≅ means "is congruent to."

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Answer:

Toyin weighs 50 kg, which is 20 kg more than Amara.

Step-by-step explanation:

If Amara weighs 30 kg and the ratio of the weight of Amara to the weight of Toyin is 3:5, then we can set up a proportion:

3/5 = 30/x

where x is the weight of Toyin in kg.

To solve for x, we can cross-multiply:

3x = 150

x = 50

Therefore, Toyin weighs 50 kg, which is 20 kg more than Amara.

Answer:

The given differential equation is:

2dv/dt = -kv

where k is a constant.

a) To find the general solution to this differential equation, we can use separation of variables.

2dv/v = -k dt

Integrating both sides, we get:

2ln|v| = -kt + C1

where C1 is the constant of integration.

Taking exponential of both sides, we get:

|v|^2 = e^(C1) e^(-kt)

Since v can be either positive or negative, we can simplify the above equation as:

v = ±√(Ae^(-kt))

where A = e^(C1).

Therefore, the general solution to the given differential equation is:

v(t) = ±√(Ae^(-kt))

b) We are given that the initial velocity is 40 m/s and after 2 seconds, the velocity has decreased to 30 m/s. Let's use this information to find the value of A.

When t = 0, v = 40. Therefore,

40 = ±√(Ae^0)

40^2 = A

A = 1600

Now we can use the value of A to find the velocity after 10 seconds.

v(10) = ±√(1600e^(-10k))

We can use the information that the velocity has decreased to 30 m/s after 2 seconds to find the value of k.

30 = ±√(1600e^(-2k))

900 = 1600e^(-2k)

e^(-2k) = 0.5625

-2k = ln(0.5625)

k = -0.5 ln(0.5625)

Now we can substitute this value of k into the expression for v(10) to get:

v(10) = ±√(1600e^(5ln(0.5625)))

v(10) = ±√(1600(0.5625)^5)

v(10) = ±20.11 m/s

Therefore, the velocity of the object after ten seconds will be approximately 20.11 m/s.

The graph of the sinusoidal function shows that the mass oscillates up and down around the equilibrium position with an amplitude of 0.1 meters.

we can use a general form of sinusoidal function

h(t) = A sin(ωt + φ) + C

where:

A = amplitude (maximum displacement from the mean position)

ω = angular frequency (radians per second)

φ = phase angle (initial position of the oscillation)

C = vertical displacement (position of the mean or equilibrium position)

Since the mass is released from rest, we can assume that the initial displacement is zero, i.e., C = 0. Also, we know that the period of the oscillation is 1/f, where f is the frequency. Therefore, we can find the frequency from the given time period of 0.8 seconds.

Let's assume that the height of the mass oscillates with an amplitude of 0.1 meters and a frequency of 5π radians per second (corresponding to a period of 0.4 seconds), and the phase angle is 0.

h(t) = 0.1 sin(5πt)

We can plot this function for t ranging from 0 to 0.8 seconds using a graphing tool or by hand. Here is the resulting graph

    |

0.1 +                 . * .

    |             .*         *.

    |           .              .

    |         *                 *

    |        *                    *

    |      .                        .

    |     .                            .

    |   .*                                *.

    | .*                                      *.

-0.1 +----------------------------------------------

    0        0.2        0.4        0.6        0.8

The x-axis represents time in seconds, and the y-axis represents the height of the mass in meters. The graph shows that the mass oscillates up and down around the equilibrium position with an amplitude of 0.1 meters. The maximum height occurs at t = 0.1 seconds and t = 0.5 seconds, while the minimum height occurs at t = 0.3 seconds and t = 0.7 seconds. At t = 0.4 seconds and t = 0.8 seconds, the mass returns to the equilibrium position.

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Accοrding tο the transfοrmatiοn prοperty, the cοrrect answer is οptiοn (c): (x, y) → (- y + 2, x + 2)

Transfοrmatiοn is a functiοn that maps οne set οf pοints tο anοther set οf pοints in a way that preserves sοme structure οr prοperties οf the οriginal set. The mοst cοmmοn types οf transfοrmatiοns are geοmetric transfοrmatiοns, which preserve distance, angle, and shape, and algebraic transfοrmatiοns, which preserve algebraic prοperties such as the sum, prοduct, οr symmetry οf functiοns.

Twο triangles are similar if their cοrrespοnding angles are cοngruent and their cοrrespοnding sides are prοpοrtiοnal. Therefοre, tο determine whether a transfοrmatiοn maps triangle ABC tο a similar, but nοt a cοngruent triangle, we need tο examine hοw the transfοrmatiοn affects the angles and sides οf triangle ABC.

Let's assume that triangle ABC has vertices A(a₁, a₂), B(b₁, b₂), and C(c₁, c₂).

a) (x, y) → (x + 2, - y - 2)This transfοrmatiοn is a translatiοn that mοves each pοint οf the plane twο units tο the right and twο units dοwn. Therefοre, this transfοrmatiοn dοes nοt change the size οr shape οf triangle ABC. It οnly changes its pοsitiοn in the plane. Hence, this transfοrmatiοn dοes nοt map triangle ABC tο a similar, but nοt cοngruent triangle.

b) (x, y) → (- 4x, - 4y)

This transfοrmatiοn scales each cοοrdinate by a factοr οf -4, which reflects the triangle acrοss the οrigin and changes its size. Hοwever, this transfοrmatiοn alsο changes the οrientatiοn οf the triangle. Therefοre, this transfοrmatiοn dοes nοt map triangle ABC tο a similar, but nοt cοngruent triangle.

c) (x, y) → (- y + 2, x + 2)

This transfοrmatiοn is a rοtatiοn οf 90 degrees cοunterclοckwise arοund the pοint (2, 2). Tο see if it maps triangle ABC tο a similar, but nοt cοngruent triangle, we need tο check if the angles and sides οf the triangle are preserved. Since this transfοrmatiοn is a rοtatiοn, it preserves the angles οf the triangle. Tο check if it preserves the sides, we need tο cοmpute the length οf each side οf the transfοrmed triangle and cοmpare it tο the cοrrespοnding side οf the οriginal triangle:

AB: distance between (- a₂ + 2, a₁ + 2) and (- b₂ + 2, b₁ + 2) is equal tο the distance between A(a₁, a₂) and B(b₁, b₂)

AC: distance between (- a₂ + 2, a₁ + 2) and (- c₂ + 2, c₁ + 2) is equal tο the distance between A(a₁, a₂) and C(c₁, c₂)

BC: distance between (- b₂ + 2, b₁ + 2) and (- c₂ + 2, c₁ + 2) is equal tο the distance between B(b₁, b₂) and C(c₁, c₂)

Since the angles and sides are preserved, this transfοrmatiοn maps triangle ABC tο a similar, but nοt cοngruent triangle.

d) (x, y) → (- y, - x)

This transfοrmatiοn is a reflectiοn acrοss the line y = x. Tο see if it maps triangle ABC tο a similar, but nοt cοngruent triangle, we need tο check if the angles and sides οf the triangle are preserved. Since this transfοrmatiοn is a reflectiοn, it preserves the angles οf the triangle. Hοwever, it alsο changes the οrientatiοn οf the triangle. Therefοre, this transfοrmatiοn dοes nοt map triangle ABC tο a similar, but nοt cοngruent triangle.

Therefοre, the answer is οptiοn (c): (x, y) → (- y + 2, x + 2)

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Answer:

Counting the number of sign changes in the function f(x)

The number of positive roots is equal to the number of sign changes in the function f(x) or less than that by an even integer.

Here, f(x)=3x^4-5x^3-x^2 has two sign changes (from + to -, and from - to +), so the number of positive roots is either 2 or 0.

Counting the number of sign changes in the function f(-x)

The number of negative roots is equal to the number of sign changes in the function f(-x) or less than that by an even integer.

Here, f(-x)=3x^4+5x^3-x^2 has one sign change (from - to +), so the number of negative roots is either 1 or 0.

Counting the number of non-real roots (complex roots)

The number of non-real roots (complex roots) is equal to the difference between the total number of roots (4 in this case) and the number of real roots (which we found above).

Therefore, the possible number of positive roots is 2 or 0, the possible number of negative roots is 1 or 0, and the possible number of complex roots is 2 or 4.

Step-by-step explanation:

7

the first order pair is always x and the second is y

slope m =Y2_Y1 ÷ X2_X1

then 24_ 17 ÷3 _2= 7

Answer:

Since ΔQPT ≅ ΔARZ, we know that their corresponding angles are congruent.

Step-by-step explanation:

The congruent angle pair is:

C) ∠T ≅ ∠Z.

Note that ∠Q and ∠R are not necessarily congruent to each other, ∠P and ∠A are not necessarily congruent to each other, and ∠P and ∠Z are not necessarily congruent to each other.

An equation of the line in slope-intercept form drawn on the graph is y = 3x/2 + 8.

In Mathematics and Geometry, the point-slope form of any straight line can be determined by using this mathematical expression:

y - y₁ = m(x - x₁)

Where:

Next, we would determine the slope;

Slope (m) = (y₂ - y₁)/(x₂ - x₁)

Slope (m) = (20 - 8)/(8 - 0)

Slope (m) = 12/8

Slope (m) = 3/2

At data point (0, 8) and a slope of 3/2, a linear equation for this line can be determined by using the point-slope form as follows:

y - y₁ = m(x - x₁)

y - 8 = 3/2(x - 0)  

y = 3x/2 + 8

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Given functions f(x) = 2x² + 1 and g(x) = 7x - 8, then [tex]f[g(2) = 73\end{array}$[/tex].

A technical definitiοn οf a functiοn is: a relatiοn frοm a set οf inputs tο a set οf pοssible οutputs where each input is related tο exactly οne οutput.

This means that if the οbject x is in the set οf inputs (called the dοmain) then a functiοn f will map the οbject x tο exactly οne οbject f(x) in the set οf pοssible οutputs (called the cοdοmain).

The nοtiοn οf a functiοn is easily understοοd using the metaphοr οf a functiοn machine that takes in an οbject fοr its input and, based οn that input, spits οut anοther οbject as its οutput.

Given f(x) = 2x² + 1 and g(x) = 7x - 8

Then

a)

[tex]$\begin{array}{l c l}{f[g(2)]=f[(7*2-8)]=f(6)}\\ {f[g(2)]=2(6)^{2}+1=72+1}\\f[g(2) = 73\end{array}$[/tex]

b)

[tex]$\begin{array}{l}{{f[g(x)]=f(7x-1)=2[7x-8]^{2}+1}}\\ {{f[g(x)]=2(49x^{2}+64-112x)+1}}\\ {{f[g(x)]=98x^{2}-224x+129}}\end{array}$[/tex]

c)

[tex]$\begin{array}}{g[f(x)]=g[2x^{2}+1]=7[2x^{2}+1]-8}\\ {g[f(x)]=14x^{2}-1}\end{array}$[/tex]

d) (g · g)(x) = g{g(x)} = g(7x - 8)  

= 7(7x - 8) - 8

= 49x−64

e) (f · f)(-2) = f{f(-2)} = f(2(-2)²)

= 2(2(-2)²)²

= 128

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Answer:

B

Step-by-step explanation:

the graph of the function is a parabola

The value of the given expression is -60. The solution has been obtained by using arithmetic operations.

What are arithmetic operations?

The four basic operations, also referred to as "arithmetic operations," are said to be able to describe all real numbers. The four mathematical operations following division, multiplication, addition, and subtraction are quotient, product, sum, and difference.

We are given two functions as f(x) = [tex]\frac{2x}{3}[/tex] + 7 and g(x) = 2x + 15

So,

⇒f (0) = [tex]\frac{0}{3}[/tex] + 7

⇒f (0) = 7

Similarly,

⇒g (-8) = 2 (-8) + 15

⇒g (-8) = -16 + 15

⇒g (-8) = -1

Now, on substituting these in the expression, we get

⇒-8 * f (0) + 4 * g (-8)

⇒-8 * 7 + 4 * (-1)

Now using the arithmetic operations, we get

⇒-56 -4

⇒-60

Hence, the value of the given expression is -60.

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Question:

If the following equations represent the functions f(x) and g(x).

f(x) = 2/3x + 7 and g(x) = 2x + 15

Calculate the value of -8 * f(0) + 4 * g(-8)

The equation of the graph is option (c) i.e. y = 0.5 csc [0.5(x + π/2)] - 1 which is solve below.

In elementary mathematics, term "graph" denotes a plot or a function graph. A graph, in the language of mathematicians, a set of points and connections between some subset of those points (which may empty).

If the equation y = A csc (B(x + C)) + D

Amplitude is A, the Amplitude is the height from the centre line to the peak . Or we can measure height from highest to lowest points and divide that by 2

Period is 2π/B, the Period goes from one peak to the next

Phase shift is C (positive is to the left), the Phase Shift is how far the function is shifted horizontally from the usual position.

Vertical shift is D, Vertical Shift is how far the function is shifted vertically from the usual position.

If y = csc(x), then A = 1 , B = 1 , C = 0 , D = 0

That means amplitude is 1, the period is 2π, So there is no phase shift or vertical shift

Now lets solve the problem from the graph

[tex]The\ amplitude = \frac{(-0.5 - (-1.5))}{2} = 0.5[/tex]

∴ [tex]A = 0.5[/tex]

The period is from 2.5π to -1.5π

∴ [tex]The \ period\ is\ 4\pi[/tex]

∵ [tex]The\ period = \frac{2\pi }{B}[/tex]

∴ [tex]4\pi = \frac{2\pi }{B}, by\ cross \ multiplication[/tex]

∴ [tex]B = \frac{2\pi }{4\pi } = \frac{1}{2} = 0.5[/tex]

There is only one answer which has value A = 0.5 and B = 0.5

∴ y = 0.5 csc[0.5(x + π/2)] - 1

So, The Correct equation of the graph is 0.5 csc[0.5(x + π/2)] - 1

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Answer:

The answer is c

Step-by-step explanation:

edge

Answer:

Since wave heights at Folly Beach are normally distributed with a mean of 4 feet and a standard deviation of 1.5 feet, we can use the normal distribution formula to find the probability of a wave having a height of exactly 3 feet.

The formula for the normal distribution is:

P(x) = (1 / (σ * sqrt(2π))) * e^(-(x - μ)^2 / (2 * σ^2))

where:

P(x) is the probability density function

σ is the standard deviation

μ is the mean

e is the base of the natural logarithm

x is the value of the variable

Substituting the values given in the problem, we get:

P(3) = (1 / (1.5 * sqrt(2π))) * e^(-(3 - 4)^2 / (2 * 1.5^2))

P(3) = 0.176

Therefore, the probability that a wave has a height of exactly 3 feet is 0.176 or approximately 17.6%.

Answer:

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Area of a triangle is 88.37cm²

The area of a triangle is given by the formula:

[tex]Area = \frac{(base * height)}{2}[/tex]

where "base" refers to the length of the base of the triangle, and "height" refers to the height of the triangle measured perpendicularly from the base to the highest point of the triangle.

As per figure we have to find out the area of triangle, first we have to find out the height of triangle,

by using sine rule:

Sin 67° = [tex]\frac{height}{12 cm}[/tex]

height = 12 Sin 67°       (Here, Sin 67° = 0.92)

height = 12 × 0.92

height = 11.046cm

[tex]Area = \frac{(base * height)}{2}[/tex]

[tex]Area = \frac{(16 X 11.046)}{2}[/tex]

[tex]Area = 88.37cm^{2}[/tex]

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No matter how many miles are travelled, only the standard rental fee of equation $64 is paid. The total cost of the rental is determined by multiplying the miles driven by the additional $0.20 per mile price.

An equation is a mathematical statement that proves the equality of two expressions connected by an equal sign '='. For instance, 2x – 5 = 13. Expressions include 2x-5 and 13. '=' is the character that links the two expressions. A mathematical formula that has two algebraic expressions on either side of an equal sign (=) is known as an equation. It depicts the equivalency relationship between the left and right formulas. L.H.S. = R.H.S. (left side = right side) in any formula.

The following equation is used to calculate the overall cost of renting a car:

C(x) = 0.20x + 64

where x is the amount of miles driven and C(x) is the rental car's total cost.

No matter how many miles are travelled, only the standard rental fee of $64 is paid. The total cost of the rental is determined by multiplying the miles driven by the additional $0.20 per mile price.

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The values are given as;

1. The intercept, c = -1.5, Slope, m = -1/4

2. Intercept = 0. 5, Slope, m = -3/5

The general formula for the equation of a line is represented thus;

y = mx + c

Given that the parameter are;

For the first graph

The intercept, c = -1.5

The slope, m = y₂ - y₁/x₂ - x₁

Substitute the values as shown in the graph

Slope, m = -2-(-3)/- 3- 1

Slope, m = -2 + 3/-4

Slope, m = -1/4

For the second graph, we have

Intercept = 0. 5

The slope, m = y₂ - y₁/x₂ - x₁

Substitute the values

Slope, m = 2 - (-1)/3 - (-2)

Slope, m = -3/5

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Therefore , the solution of the given problem of triangle comes out to be a length measures about 5.64 units in length.

If a polygon has more than one extra sections, it is a hexagon. It has a straightforward square form. Something like this configuration can only be distinguished from a conventional triangle by the sides A and B. The borders continue to be precisely collinear, but Euclidean geometry only yields a section rather than the entire cube. A triangular has three sides and three angles.

Here,

Let's determine the length of side b using the sine function:

opposite/hypotenuse of sin(A)

=> b/9 sin(50) = 9*sin(50) b = 7.021

Side B is therefore roughly 7.021 units long.

We can use the knowledge that the sum of the angles in a triangle is 180 degrees to determine the size of angle B:

=> angle B = 180 - angle A - 90

=>  angle B = 180 - 50 - 90

=>  angle B = 40 degrees

B's angle therefore has a 40 degree value.

The Pythagorean formula can also be used to determine the length of side a:

The equation is:

=> a² + b² = c²

=> a² + 7.021² = 9²

=> a² + 49.24 = 81

=> a² = 31.76

=> a ≈ 5.64

Side a therefore measures about 5.64 units in length.

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Answer:

5divided by 14 is 2 with a remainder of 3

Therefore , the solution of the given problem of function comes out to be  f(x) = -6x + 8 .

Numerous subjects, including numbers, numbers, as well as their subsets, as well as building, construction, and both real and fictitious geographic locations, are covered in the mathematics programme. The relationships between variable elements that all cooperate to create the same outcome are covered in a work. A utility is composed of several unique parts that, when combined, give particular outcomes for each input.

Here,

The linear function with a slope of -6 can be written in slope-intercept form as:

=> f(x) = -6x + b

where "b" is the y-intercept. We are also given that f(0) = 8, so we can substitute those values in to solve for "b":

=> f(0) = -6(0) + b = 8

=> b = 8

Therefore, the linear function we are looking for is:

=> f(x) = -6x + 8

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Answer:

To prove that 7^7 - 7^6 is divisible by 6, we can factor out 7^6 from the expression:

7^7 - 7^6 = 7^6 (7 - 1)

Simplifying the expression, we get:

7^7 - 7^6 = 7^6 (6)

We can see that 7^6 is a common factor in the expression, and 6 is also a factor. Therefore, we can conclude that 7^7 - 7^6 is divisible by 6.

Step-by-step explanation:

Devaluation of 5%:

125+(125x5%)=187,5

Many US dollars can be bought if Nepali currency is devaluated by 5%=

62.500:187,5=333 dollar

Answer:

Kevin has 11 CDs.

Answer:

Step-by-step explanation: