If the radius of the oil spill is given by

a. Find a function that gives the area of the oil spill in terms of the number of days since the start of the spill, A(r(t)).

b. Find the area of the oil spill to the nearest square mile 7 days after the start of the spill.

a. Find a function that gives the area of the oil spill in terms of the number of days since the start of the spill, A(r(t)).