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?
Algebra ->
Surface-area
-> 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?
Log On
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..
