Tuesday

July 28, 2015

July 28, 2015

Posted by **Herb** on Tuesday, January 14, 2014 at 3:02pm.

- Math -
**Damon**, Tuesday, January 14, 2014 at 4:06pmLOL, it is the surface area 4 pi r^2

4 pi r^2 dr = dV

or

dV/dr = 4 pi r^2

or

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