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A melting snowball has a radius that decreases 1/4 inch per hour.?Find the rate of change of the volume with respect to time when the radius is 4in ?

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Calculus solution

V=4/3 PI r^3
dv/dt= 4 PI r^2 dr/dt

dr/dt is given as .25 in/hr
then solve for dv/dt when r=4

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