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OpenStudy (anonymous):
What is the surface area of a sphere with a circumfrence of 38in? (When you answer, please explain how you got this, I am so confuesed.)
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OpenStudy (anonymous):
circumference = 2 pi r 38 = 2 pi r r = 6.05 surface area = 4 pi r^2 = 4 pi (6.05)^2 =460
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