Posted by Karol on .
Oil from a ruptured tanker spreads in a circular pattern. If the radius of the circle increases at the constant rate of 1.5 feet per second, how fast is the enclosed area increasing at the end of 2 hours?

Calculus 
MathMate,
Please do not repost within a minute. This could cause duplicate answers, and therefore slow down everyone else.
See:
http://www.jiskha.com/display.cgi?id=1290561331