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September 21, 2014

September 21, 2014

Posted by **james** on Thursday, November 7, 2013 at 2:54pm.

- calculus -
**Steve**, Thursday, November 7, 2013 at 4:37pmv = 4/3 pi r^3

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

-1.5 = 4pi (16) dr/dt

dr/dt = -1.5/64pi

a = 4pi r^2

da/dt = 8pi r dr/dt

= 8pi (4) (-1.5/64pi)

= -3/4 m^2/min

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