SOLUTION: To the nearest tenth of a square inch, how much surface area is added to a spherical balloon whose radius grows from 10 to 20 inches long?
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Question 443244: To the nearest tenth of a square inch, how much surface area is added to a spherical balloon whose radius grows from 10 to 20 inches long?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
S.A.=4πr2
r=10,S.A.=4πx100=400π
r=20,S.A.=4πx400=1600π
r20-r10=1600π-400π=1200π=3769.90 c.i..
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