KZAA

the volume V of a right circular cone of height h=8 feet and radius r feet is V=V(r)=2pier^2. If r is changing, find the instantaneous rate of change of the volume V with respect to the radius r at r=4.

A person's temperature is f (t) degrees Fahrenheit t days after the start of a ten-days sickness and f(t)=98.6+1. 2t-0.12t^2, 0 is less than or equal to t, and t is less than or equal to 10. find the rate of change of the temperature when the person has b...