Acircular oil spill continues to increase in size.
the radius of the oil spill, in miles, is given by the
function r(t) = 0.5 + 2t, where t is the time in hours.
the area of the circular region is given by the
function a(n) = trr2, where r is the radius of the
circle at time t.
explain how to write a composite function to find
the area of the region at time t.