Two oil tankers crash in the Pacific Ocean. The spreading oil slick has a circular shape, and the radius of the circle is increasing at 220 meters per hour. (a) Express the radius of the spill, r, as a power function of time, t, in hours since the crash. r(t) = i (b) Express the area of the spill, A, as a power function of time, t. A(t) = i (c) Cleanup efforts begin 6 hours after the spill. How large an area is covered by oil at that time? •πm² i

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