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Fudgin [204]
3 years ago
15

The circumference of a bowling ball is 8pi in. Find the surface area of the bowling ball. Express your answer in terms of pi.

Mathematics
1 answer:
MrRa [10]3 years ago
7 0
Surface area of a sphere (3D solid's name for ball shaped object) is given by

SA = 4 \pi r^{2}

We do not know the radius of the sphere but we can work it out from the circumference 8 \pi

Circumference = 2 \pi r
8 \pi =2 \pi r
r= \frac{8 \pi }{4 \pi }=2

then
SA=4 \pi  (2)^{2} =16 \pi
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3 years ago
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Dvinal [7]

Answer:

1.99

Step-by-step explanation:

We have been given the heights of adult men in America are normally distributed, with a mean of 69.8 inches and a standard deviation of 2.61 inches. We are asked to find the z-score of height of man with 6 feet 3 inches.

We will use z-score formula to solve our given problem.

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z=\frac{5.2}{2.61}

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z\approx 1.99

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4 0
4 years ago
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