# Math Help - pre calc. rates

1. ## pre calc. rates

as a large snowball melts, its size changes. The volume, V, in cubic centimeters, i given by the equation V= 4/3(pi)r^3 , where r is radius in centimeters, and re[0,30]

a)write a simplified expression for hte avg. rate of change if the volume w/ respect to its radius from r=20 to r=20 +h

2. Originally Posted by blahblahblah
as a large snowball melts, its size changes. The volume, V, in cubic centimeters, i given by the equation V= 4/3(pi)r^3 , where r is radius in centimeters, and re[0,30]

a)write a simplified expression for hte avg. rate of change if the volume w/ respect to its radius from r=20 to r=20 +h
$\frac{V(20+h) - V(20)}{(20+h) - 20}$

give it a go ...