SOLUTION: The radius of a spherical balloon is tripled. What is the increase in volume, as a percent?

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Question 1147337: The radius of a spherical balloon is tripled. What is the increase in volume, as a percent?
Answer by Alan3354(69443) About Me  (Show Source):
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The radius of a spherical balloon is tripled. What is the increase in volume, as a percent?
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Vol+=+4pi%2Ar%5E3%2F3
3 times r --> 27 times Vol
---> 2600% increase in volume