Oil spills the oil spilling from the ruptured hull of a grounded tanker spreads in all directions in calm waters. Suppose the area polluted is a circle of radius r and the radius is increasing at the rate of 2 ft/sec.
A. Find a function f giving the area polluted in terms of r.
B. Find a function t giving the radius of the polluted area in terms of t.
C. Find a function h giving the area polluted in terms of t.
D. What is the size of the polluted area 30 sec after the hull was ruptured?