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April 19, 2014

April 19, 2014

Posted by **Peggy** on Friday, November 30, 2012 at 1:36pm.

- Math -
**Steve**, Friday, November 30, 2012 at 2:36pmv = 4/3 pi r^3

dv/dt = 4 pi r^2 dr/dt

100 = 4 pi * 25 dr/dt

dr/dt = 1/pi

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