Posted by **Kelly** on Tuesday, October 15, 2013 at 9:54pm.

Let A(t) be the (changing) area of a circle with radius r(t), in feet, at any time t in min.

If the radius is changing at the rate of dr/dt =3ft/min, find the rate of change

of the area(dA/dt) at the moment in time when r = 16 ft

dA/dt=

## Answer This Question

## Related Questions

- calculus - Determine the rate at which the surface area is changing with respect...
- Calculus - 1. The radius of a sphere is expanding at a rate of 14 in/min. a) ...
- Calculus - 1. The radius of a sphere is expanding at a rate of 14 in/min. a) ...
- Calculus - A spherical balloon is inflated at a rate of 10 cubic feet per minute...
- Calculus Homework - You are blowing air into a spherical balloon at a rate of 7...
- calculus - Sand falls from a conveyor belt at a rate of 20 m^3/min onto the top ...
- math - Suppose a forest fire spread in a circle with radius changing at a rate ...
- calculus - oil is leaking from a pipeline on the surface of a lake and forms an ...
- calculus - The radius of a circular oil spill is increasing at a rate of 10 feet...
- calculus - The radius of a circular oil spill is increasing at a rate of 10 feet...

More Related Questions