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masya89 [10]
3 years ago
7

Find the surface area Sphere: area of the great circle ~ 28.6 in2

Mathematics
1 answer:
kari74 [83]3 years ago
6 0
Area of a circle is πr².

Therefore we can get the radius of the great circle (and thus the sphere) by doing √(A / <span>π).
</span>
√(28.6 / <span>π) = 3.017 to 3DP.
</span>

Surface area of a sphere is 4πr².

4<span>π(3.017)</span>² = 114.4 to 1DP
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Chris will take 0.75 seconds to return to his starting height of 10 feet.

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2 years ago
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