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OpenStudy (anonymous):
If a spherical ball is enlarged so that its surface area is 9 times greater than its original surface area, then the original radius was multiplied by _________
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jimthompson5910 (jim_thompson5910):
Hint: In general, if each dimension of a solid is multiplied by k, then the surface area will increase by k^2 (where k is some number greater than 1)
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