intelligence test scores refered to as intelligent quotient or IQ scores are based on characteristics such as verbal skills,abstruct reasoning power, numerical ability and spatial visualization.if plotted on a graph the distribution of IQ scores approximates a normal curve with a mean of about 100. an IQ scores above 115 is considered superior studies of "intellectually gifted" children have generally defined the lower limit of their IQ scores at 140: approximately 1% of the population have IQ scores above this limit.find the standard deviation of this distribution?​

Answer:

a^2-ac/a-b + b^3-b^2*a/b+c + bc-c^2/a-c

Step-by-step explanation:

Answer:

Step-by-step explanation:

The formula for average rate of change of a function f(x) over an interval [a, b] is given by:

Average rate of change = [f(b) - f(a)] / (b - a)

In this case, we are given the function f(x) = 10 and the interval [2, 3]. So, a = 2 and b = 3. Substituting these values, we get:

Average rate of change = [f(3) - f(2)] / (3 - 2)

= [(10 x 3 - 4) - (10 x 2 - 4)] / (3 - 2)

= (30 - 20) / 1

= 10

Therefore, the average rate of change of the function f(x) = 10 from [2, 3] is 10.

The condition that proves congruent of two given triangles ΔDEF ∼ ΔJKL would be option (a) DE : JK = 3:1 but ratio value in option is given wrong.

In this case triangle in congruent when two sides and one angle of first triangle is equal to two sides and one angle of second triangle.

we have given proof two triangles congruent by the postulate of SAS.

Since two corresponding sides of these triangles are congruent and one  angle is also congruent. So  to prove both the triangles congruent.

∠EDF ≅ ∠KJL will complete the SAS property to prove both the triangles are congruent.

DE : JK

= 21 : 7

= 3 : 1

So, DE: JK = 3:1 is answer.

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Check the picture below.

[tex]52=(4y-4)+(3y)\implies 52=76-4\implies 56=7y \\\\\\ \cfrac{56}{7}=y\implies \boxed{8=y} \\\\\\ \stackrel{\measuredangle W}{4y-4}\implies 4(8)-4\implies \text{\LARGE 28}[/tex]

The fraction of the water bottles that has at least 24 ounces is 1/4.

A box plot is a graph that is used to show the distribution and level of a set of scores. The scores are distributed into 4 groups. Each group has a value of 25%

24 represents the third quartile of the dataset. The third quartile represents 75% of the dataset. A third quartile value of 24 means that at most 3/4 (75%) of the dataset has a value that is at most 24 and 1/4 or 25% of the dataset has a value that is at least 24.

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At 4.0 megabits per second, Able Cable provides the fastest average downloading speed.

To find out which company offers the fastest mean downloading speed, we need to calculate the mean download speed for each provider and then compare the results.

The mean download speed for CityNet is:

(3.6 + 3.7 + 3.7 + 3.6 + 3.9) / 5 = 3.7 megabits per second

The mean download speed for Able Cable is:

(3.9 + 3.9 + 4.1 + 4.0 + 4.1) / 5 = 4.0 megabits per second

The mean download speed for Tel-N-Net is:

(3.9 + 3.7 + 4.0 + 3.6 + 3.8) / 5 = 3.8 megabits per second

Therefore, Able Cable offers the fastest mean downloading speed at 4.0 megabits per second.

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The surface area of the triangular prism is 1880 square centimeters.

To find the surface area of the triangular prism, we need to calculate the area of each of its faces and add them up.

First, let's calculate the area of the triangular base. The formula for the area of a triangle is:

Area = (base x height) / 2

Substituting the given values, we get:

Area = (30 x 20) / 2 = 300 cm²

Since the triangular prism has two identical triangular faces, the total area of the two triangular faces is:

2 x 300 cm² = 600 cm²

Now, let's calculate the area of the rectangular faces. The length of the rectangular faces is the same as the length of the prism, which is 32 cm. The height of the rectangular faces is the same as the height of the triangle, which is 20 cm. The formula for the area of a rectangle is:

Area = length x height

Substituting the given values, we get:

Area = 32 x 20 = 640 cm²

Since the triangular prism has two identical rectangular faces, the total area of the two rectangular faces is:

2 x 640 cm² = 1280 cm²

Finally, to find the total surface area of the triangular prism, we add the areas of the two triangular faces and the two rectangular faces:

600 cm² + 1280 cm² = 1880 cm²

Therefore, the surface area of the triangular prism is 1880 square centimeters.

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Answer:

34,900,000

Step-by-step explanation:

349 ×  [tex]10^{5}[/tex]

[tex]10^{5}[/tex] = 100,000

349 x 100000 = 34,900,000

So, the answer is 34,900,000

Answer:

A

Step-by-step explanation:

$73,394.49 is the present value of $80,000 that is due in 4 years at a 4% interest rate.

Compound interest is interest that is accrued on both the principal and the prior interest. It is frequently referred to as "interest over the interest" as a result. Here, the interest that has already accrued is added to the principal, and the resulting amount acts as the new principal for the following period.

Hence, compound interest is the sum of interest on the principal and interest on earlier interest.

Using the formula below, it is possible to determine the present value of $80,000 payable in 4 years at a 4% rate of interest compounded quarterly:

PV = FV / (1 + r/n) ^(nt)

such that:

Present Value, or PV, is the term.

FV stands for future value.

The annual number of compounding periods is n, and the interest rate is r.

The number of years is t.

To solve this problem, we have:

FV = $80,000

r = 4% = 0.04

n = 12 (as compounding is done monthly)

t = 4

Adding these values to the formula provides the following results:

PV = 80,000 / (1 + 0.04/12) ^ (12 × 4)

PV = 80,000 / (1.003333) ^48

PV = 80,000 / 1.090777

PV = 73,394.49

As a result, $73,394.49 is the present value of $80,000 that is due in 4 years at a 4% interest rate.

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Answer:

To find the probability of a value between 50 and 70 in a normal distribution with mean 40 and standard deviation 15, we need to first standardize the values using the z-score formula:

z = (x - μ) / σ

where x is the value we are interested in, μ is the mean, and σ is the standard deviation.

For the lower bound of 50:

z = (50 - 40) / 15 = 0.67

For the upper bound of 70:

z = (70 - 40) / 15 = 2

Using a standard normal distribution table or a calculator with a built-in normal distribution function, we can find the probabilities corresponding to these z-scores:

P(0 < z < 0.67) = 0.2514

P(0 < z < 2) = 0.4772

To find the probability of a value between 50 and 70, we can subtract the probability of the lower bound from the probability of the upper bound:

P(50 < x < 70) = P(0 < z < 2) - P(0 < z < 0.67)

P(50 < x < 70) = 0.4772 - 0.2514

P(50 < x < 70) = 0.2258

Therefore, the probability of a value between 50 and 70 in this normal distribution is 0.2258 or about 22.58%.

The number of brushes and number of paint bought by Ben are 7 and 18 respectively.

A group of equations that are concurrently solved to determine the values of the variables involved is referred to as a system of equations. A system of equations can have any number of variables and equations and can be either linear or nonlinear.

They could depict connections between various values, restrictions on resources or attributes, or optimization goals.

Let us suppose the number of brushes = b.

Let us suppose the number of paints = p.

Thus,

b + p = 25

1500b + 800p = 27000

Multiplying the first equation by 1500 and subtracting it from the second equation, we get:

800p - 1500b = -7500

p = (1500b + 7500) / 800

Substituting the value of p in first equation:

b + (1500b + 7500) / 800 = 25

Multiplying both sides by 800 and simplifying, we get:

2000b + 7500 = 20000

b = 6.25 = 7

Substitute the value of b in first equation:

7 + p = 25

p = 18

Hence, the number of brushes and number of paint bought by Ben are 7 and 18 respectively.

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By answering the above question, we may state that The solution is triangle closest to option d: 58% x, 42% y.

A triangle is a polygon because it contains four or more parts. It features a simple rectangular shape. A triangle ABC is a rectangle with the edges A, B, and C. When the sides are not collinear, Euclidean geometry produces a single plane and cube. If a triangle contains three components and three angles, it is a polygon. The corners are the points where the three edges of a triangle meet. The sides of a triangle sum up to 180 degrees.

The total sales of product x may be computed as follows: 5,000 units * $110/unit selling price = $550,000

The total sales of product y may be computed as follows: 35,000 units * $70/unit selling price = $2,450,000

The total sales of both goods are as follows: $550,000 + $2,450,000 = $3,000,000

Hence the proportion of revenue provided by product x is: $550,000 / $3,000,000 = 0.1833 or 18.33%

And the proportion of sales produced by product y is: $2,450,000 / $3,000,000 = 0.8167 or 81.67%

As a result, Rusty Co.'s sales mix was 18.33% x and 81.67% y last year.

The solution is closest to option d: 58% x, 42% y.

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The number of slides per hour that Ibragim believes he will be able to process w weeks from now is represented by the following calculation: 65 + 2w.

Number is an abstract concept used to describe a quantity or amount. It can refer to a countable quantity of objects, or it can refer to an abstract concept such as size, direction, or position. In mathematics, number is used as a way of measuring and describing a quantity or amount. It is used to represent quantities in equations and formulas, to compare quantities, and to measure and compare distances. Number is also used to represent relationships between different objects, such as in geometry where angles, lines, and points are all represented by numbers.


This equation shows that Ibragim's slides per hour processing speed will increase by 2 for each week that passes. For example, if Ibragim practises for 4 weeks, his slides per hour processing speed will have increased from 65 to 73. This is because 65 + (2 x 4) = 73. Therefore, if Ibragim practises for w weeks, then the number of slides per hour he believes he will be able to process will be 65 + 2w.

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The expression 65 + 2w represents the number of slides per hour that Ibragim believes he will be able to process w weeks from now. This expression can be used to calculate the number of slides per hour that Ibragim believes he will be able to process after any number of weeks of practice.

Number is an abstract concept used to describe a quantity or amount. It can refer to a countable quantity of objects, or it can refer to an abstract concept such as size, direction, or position. In mathematics, number is used as a way of measuring and describing a quantity or amount. It is used to represent quantities in equations and formulas, to compare quantities, and to measure and compare distances. Number is also used to represent relationships between different objects, such as in geometry where angles, lines, and points are all represented by numbers.


The number of slides per hour that Ibragim believes he will be able to process w weeks from now is given by the expression 65 + 2w. In this expression, 65 represents the number of slides per hour that Ibragim can currently process, and 2w represents the number of slides per hour that Ibragim believes he can increase his processing speed by each week.

For example, if Ibragim believes he will be able to process slides at a rate of 100 per hour after 6 weeks of practice, then the expression would be 65 + 2(6) = 77. This means that Ibragim believes he will be able to process 77 slides per hour after 6 weeks of practice. In general, if w represents the number of weeks of practice, then the expression 65 + 2w represents the number of slides per hour that Ibragim believes he will be able to process w weeks from now.

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Complete questions as follows-

If one borrowed $2,500 for 2 years and paid interest of $155, the interest rate charged was 3.053%.

The interest rate is computed using an online finance calculator with the following set parameters.

The interest rate represents the annual percentage rate of interest charged on the loan for 2 years.

N (# of periods) = 2 years

PV (Present Value) = $2,500

PMT (Periodic Payment) = $-0

FV (Future Value) = $-2,655

Results:

I/Y = 3.053%

Total Interest = $155.00

Thus, for this loan, the interest rate was 3.053%.

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Answer:

Step-by-step explanation:

If the temperature of a person follows a normal distribution, we know that approximately 95% of the observations fall within 2 standard deviations of the mean. Since we are given that we want to find the probability of the temperature being within 2.42 standard deviations of its mean, we can use the standard normal distribution and the z-score formula.

The z-score formula is given by:

z = (x - μ) / σ

where x is the observed value, μ is the mean, and σ is the standard deviation. In this case, we want to find the probability that the temperature is within 2.42 standard deviations of the mean, so we can set:

z = 2.42

Since the normal distribution is symmetric, we can find the area to the right of the mean (z = 0) and double it to get the total probability. Using a standard normal distribution table or calculator, we find that the area to the right of z = 2.42 is approximately 0.0074. So the area to the left of z = 2.42 is approximately 0.9926.

Doubling this area gives us the total probability:

P(z < 2.42 or z > -2.42) = 2 * P(z < 2.42) = 2 * 0.9926 = 0.9852

Therefore, the probability that the temperature of a randomly selected person will be within 2.42 standard deviations of its mean is 0.9852, or approximately 0.9852 with four decimal places.

a. The market basket fοr 2020 is: $3200

b. The market basket cοst $1,550.00 in 2019.

c. The market basket cοst $3,200.50 in 2020.

d.The inflatiοn rate between 2019 and 2020 is 106.45%.

Inflatiοn aims tο evaluate the tοtal impact οf price changes οn a wide range οf gοοds and services. It allοws fοr the pοrtrayal οf the οverall increase in an ecοnοmy's prices fοr prοducts and services as a single value.

A. Tο calculate the market basket, we need tο multiply the quantity οf each item by its price and add up the results. Using the quantities and prices given, the market basket fοr 2019 is:

(100 pizzas × $10.00/pizza) + (50 sοdas × $3.00/sοda) + (200 cοοkies × $2.00/cοοkie)

= $1000 + $150 + $400

= $1550

Similarly, the market basket fοr 2020 is:

(150 pizzas × $15.00/pizza) + (100 sοdas × $3.25/sοda) + (250 cοοkies × $2.50/cοοkie)

= $2250 + $325 + $625

= $3200

B. Tο calculate the cοst οf the market basket in 2019, we need tο multiply the quantities by their respective prices and sum them up. The cοst in 2019 is:

(100 x $10.00) + (50 x $3.00) + (200 x $2.00) = $1,550.00

Therefοre, the market basket cοst $1,550.00 in 2019.

C. Tο calculate the cοst οf the market basket in 2020, we use the same methοd. The cοst in 2020 is:

(150 x $15.00) + (100 x $3.25) + (250 x $2.50) = $3,200.50

Therefοre, the market basket cοst $3,200.50 in 2020.

D. Tο calculate the inflatiοn rate between 2019 and 2020, we use the fοllοwing fοrmula:

Inflatiοn rate = ((Cοst in year 2 - Cοst in year 1) / Cοst in year 1) x 100%

Plugging in the values, we get:

Inflatiοn rate = (($3,200 - $1,550) / $1,550) x 100%

= 106.45%

Therefοre, the inflatiοn rate between 2019 and 2020 is 106.45%.

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Therefοre , the sοlutiοn οf the given prοblem οf amοunt cοmes οut tο be Optiοn B ($7,550.25) is the cοrrect chοice.

Aggregate attempting tο calculate the duratiοn, tοtal cοst, οr quantity. The quantity that is in frοnt οf οurself οr οn yοur mind is extremely busy. the result, its impοrtance, οr its relevance. Principal, interest, and third bοοkkeeping make up the tοtal. Amοunted, amοunts, and amοunting are sοme οf the wοrd variants. flexible term Its quantity refers tο hοw much that anything is.

Here,

The cοmpοund interest expressiοn is as fοllοws:

=> [tex]A = P(1 + r/n)^{(nt)[/tex]

Here are the facts:

=> A = $18,539.38 (the sum after 20 years) (the amοunt after 20 years)

The yearly interest rate, which is 4.5 percent, is r = 0.045.

n = 12 (the interest is cοmpοunded mοnthly, sο there are 12 cοmpοunding times per year) (the interest is cοmpοunded mοnthly, sο there are 12 cοmpοunding periοds per year)

t = 20 (the periοd in years) (the time in years)

By rearranging the sοlutiοn, we can find P:

=>[tex]A = P(1 + r/n)^{(nt)[/tex]

Adding the numbers we are familiar with

=>[tex]P = \$18,539.38 / (1 + 0.045/12)^{(12*20)[/tex]

=> P ≈ $7,550.25

Cοnsequently, the initial investment is wοrth rοughly $7,550.25. The number is $7,550.25, rοunded tο the nearest hundredth.

Optiοn B ($7,550.25) is the cοrrect chοice.

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Answer:

Step-by-step explanation:

x² + 4x-21

x²-5x-2

x² + 3x + 7

x² + 4x-21

x²-5x-2

x² + 3x + 7

x²-x-1

x²-x-1

The interquartile range, according to the provided assertion, is 9.5.

The interquartile range is what?

The spread of your data's centre quarter is measured by the interquartile range (IQR). It is the limit for your sample's centre 50%. Assess the diversity where the majority of your numbers are by using the IQR. Larger numbers denote a wider distribution of your data's centre region.

The following statements are true:

The range of scores is 38.

The spread of results without the outlier would be 12.

The interquartile range is less affected by the anomaly than the range.

9 is the interquartile number.

The interquartile range would indeed be 9.5 if there were no anomaly.

To calculate the range, we subtract the smallest score from the largest score

Range = 100 - 62 = 38

If we remove the outlier, 62, then the range becomes:

without an anomaly= 100 - 88 = 12

The outlier has a greater impact on the range than on the interquartile range because the interquartile range only considers the middle 50% of the data, whereas the range considers all of the data.

To calculate the interquartile range, we need to find the values of the first and third quartiles. The median of a lower half of the data is represented by the first quartile (Q1), and the median of the higher half is represented by the third quartile (Q3).

Arranging the scores in ascending order:

62, 88, 89, 90, 92, 95, 96, 98, 100, 100

The median is the middle value, which is 93.

Q1 is the median of the lower half of the data, which is 62, 88, 89, 90, 92. The median of this set is (88 + 89) / 2 = 88.5.

Q3 is the median of the upper half of the data, which is 95, 96, 98, 100, 100. The median of this set is (98 + 100) / 2 = 99.

The disparity between Q3 and Q1 is the interquartile range (IQR):

IQR = Q3 - Q1 = 99 - 88.5 = 10.5 ≈ 9

If we remove the outlier, the scores become:

88, 89, 90, 92, 95, 96, 98, 100, 100

Q1 is the median of the lower half of the data, which is 88, 89, 90, 92. The median of this set is (89 + 90) / 2 = 89.5.

Q3 is the median of the upper half of the data, which is 95, 96, 98, 100, 100. The median of this set is (96 + 98) / 2 = 97.

The IQR is:

IQR = Q3 - Q1 = 97 - 89.5 = 7.5 ≈ 9.5

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The distance KT and angle of elevation of the pole's top, K, with respect to the ground, D, are;

KT is about 6.2 cm

DN = 30 m

The angle of elevation of K from D is  0.23°

The angle created between a horizontal line and the line of sight of a viewer gazing up at an object is known as the angle of elevation.

The two vertical poles are MT and NK

The height of MT = 8 cm

The height of NK = 12 cm

From the top of the pole MT, point T, to the top of the pole NK, point K, there is a 40-degree elevation difference.

The poles' height differences are 12 cm - 8 cm, or 4 cm.

The distance KT can be found as follows;

Therefore;

sin(40°) = 4/KT

KT = 4/(sin(40°)) ≈ 6.2

The distance KT is approximately 6.2 cm

According to the information in the question, the distance is DN = 30 m.

The base of the poles MT and NK is on the same level ground as point D.

ND=30m

Hence, the trigonometric ratio for tangent may be used to get the angle of elevation,, of the top of the pole NK, (point K), from D as follows;

tan(θ) = NK/ND

tan(θ) = (12 cm)/(30 m) = 0.12/30 = 0.004

θ = arctan(0.004) ≈ 0.23°

K is elevated from d at an angle of roughly 0.23°.

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The coordinates of the vertices from of the image of triangle ABC are A'(x, y) = (0, - 1), B'(x, y) = (- 1, - 1) and C'(x, y) = (- 0.5, - 4).

Herein we find the representation of a triangle on a Cartesian plane, which is generated by three non-colinear points set on the plane mentioned above. The image of the triangle can be found by applying the following rigid transformation formulas:

x' = Ox + (x - Ox) · cos θ - (y - Oy) · sin θ

y' = Oy + (x - Ox) · sin θ + (y - Oy) · cos θ

Where:

If we know that (Ox, Oy) = (- 2, 0), θ = 180°, A(x, y) = (- 4, 1), B(x, y) = (- 3, 1) and C(x, y) = (- 3.5, 4), then the resulting coordinates of the triangle are, respectively:

xA' = Ox + (xA - Ox) · cos θ - (yA - Oy) · sin θ

xA' = - 2 + [- 4 - (- 2)] · cos 180° - (1 - 0) · sin 180°

xA' = 0

yA' = Oy + (xA - Ox) · sin θ + (yA - Oy) · cos θ

yA' = 0 + [- 4 - (- 2)] · sin 180° + (1 - 0) · cos 180°

yA' = - 1

xB' = Ox + (xB - Ox) · cos θ - (yB - Oy) · sin θ

xB' = - 2 + [- 3 - (- 2)] · cos 180° - (1 - 0) · sin 180°

xB' = - 1

yB' = Oy + (xB - Ox) · sin θ + (yB - Oy) · cos θ

yB' = 0 + [- 3 - (- 2)] · sin 180° + (1 - 0) · cos 180°

yB' = - 1

xC' = Ox + (xC - Ox) · cos θ - (yC - Oy) · sin θ

xC' = - 2 + [- 3.5 - (- 2)] · cos 180° - (4 - 0) · sin 180°

xC' = - 0.5

yC' = Oy + (xC - Ox) · sin θ + (yC - Oy) · cos θ

yC' = 0 + [- 3.5 - (- 2)] · sin 180° + (4 - 0) · cos 180°

yC' = - 4

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Using suitable identities, the following mathematical expressions are evaluated:

a) 972 is evaluated as 1000 - 28

b) 102 x 105 is evaluated as = 10710

Mathematical evaluation refers to the process of finding the numerical value of a mathematical expression or equation using mathematical operations and rules. The evaluation involves substituting values for variables and simplifying the expression or equation until a final answer is obtained.

In more complex cases, mathematical evaluation may involve multiple steps and the use of various identities and formulas to simplify the expression or equation before arriving at the final answer

The given values are evaluated as follows:

a) 972 can be evaluated using the following identity:

972 = 1000 - 28

b) 102 x 105 can be evaluated using the following identity:

102 x 105 = (100 + 2) x 105 = 100 x 105 + 2 x 105 = 10500 + 210 = 10710

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Therefore, y = 7x + 2/5, 7x + 5 = y, and y = 7x + 4 are the equations that depict a line parallel to y = 7x + 3.

A mathematical statement known as an equation demonstrates the equality of two expressions or values by separating them with an equal symbol. The values on either side of the equal symbol in an equation are equal and can be used to find the value of an unknown variable. For instance, the equation "2x + 3 = 7" states that "2x + 3" equals the number "7".

given

Since parallel lines have identical slopes, the equation of a line that is perpendicular to y = 7x + 3 will have the same slope as 7.

Any equation of the form y = 7x + b, where b is a constant, will therefore indicate a line parallel to y = 7x + 3.

y = 3x + 7: This line's slope, 3, is less than 7, so it is not parallel to the line y = 7x Plus 3.

y = 7x + 2/5: This line is parallel to y = 7x + 3 because it has the same slope as that equation.

7x + 5 = y: This equation is parallel to y = 7x + 3 because y = 7x + 5 has the same slope as it.

y = 7 + 3x is not parallel to y = 7x + 3 because it has the same slope as the solution y = 3x + 7, which does not equal 7.

Therefore, y = 7x + 2/5, 7x + 5 = y, and y = 7x + 4 are the equations that depict a line parallel to y = 7x + 3.

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The complete question is:-  Choose all the equations below that represent a line parallel to

y=7x+3

y=3x+7 y=7x+2/5

7x+5=y

y=2x+3

y=4+7x y=3-7x

y+7x=3 y=7+3x

The missing description in radical form is ∛64.

In Mathematics, an exponent can be defined as a mathematical operation that is used in conjunction with an algebraic expression to raise a quantity to the power of another and it is generally written as;

bⁿ

Where:

the variables b and n represent numerical values or an algebraic expression.

Based on the information about the rational exponent form, we have the following:

64^{1/3} = 4

∛64 = 4.

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Answer:

36π

Step-by-step explanation:

To find the volume of the sphere we have to use the equation: [tex]\frac{4}{3}[/tex]πr³

To work our answer out we have to distribute the values we are given into the question...

We can ignore π for now as we will add it at the end

Now we have to solve what we are given...

Now we can put π into our answer...

Hope this helps, have a lovely day! :)