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Kobotan [32]
3 years ago
15

Determine the value of r so the line passing through each pair of points has the given slope

Mathematics
1 answer:
Nonamiya [84]3 years ago
4 0
We can use the slope formula to solve this one:
m=\frac{y_2-y_1}{x_2-x_1}
\frac{1}{2}=\frac{2-3}{r-6}
(r-6)=2(-1)
r-6=-2
r=4
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the surface area of a sphere is 1,017.36 square inches.what is the volume of the sphere? use 3.14 for pi
emmasim [6.3K]

Answer:

<em>Area = 254.34 inches ³</em>

Step-by-step explanation:

The formula to find the surface area of a sphere is:

SA = 4\pi r^{2}

To find the volume of the sphere, we first need to figure out the radius (r) of the sphere. We can accomplish this by reversing the formula that was used to find the surface area. (1017.36 in^{2})

SA = 4\pi r^{2}

1017.36 = 4\pi r^{2}

Divide both sides by pi (3.14).

1017.36 = 4\pi r^{2}

324 = 4 r^{2}

Divide both sides by 4.

324 = 4 r^{2}

81 = r^{2}\\

Find the square root of both sides.

81 = r^{2}\\

\sqrt{81} = r

<em>radius = 9</em>

<em />

Insert the value of the radius into the formula for finding the volume of a sphere. (A=\pi r^{2})

(A=\pi r^{2})

A=\pi (9)^{2}

A=\pi (81)

A = 254.34

<em>Area = 254.34 inches ³</em>

<em />

~Hope this helps!~

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How many square inches of crust would it take to cover the bottom of a pie dish with a 15 inch diameter ?​
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Step-by-step explanation:

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