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Geometry 6 Online
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 _________.

OpenStudy (campbell_st):

when comparing the ratio of areas its the linear measurements squared. \[\frac{9}{1} = (\frac{r}{1})^2\] find r

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