Mathematics, 15.12.2020 16:00, chriscol4082

A drop of oil makes a circular ring in a water puddle. The radius of the oil ring expands at 1.5 cm per second. If r(t)= 1.5t and a(r)= (pi)r^2 , what composition of functions describes the area of the oil ring in terms of time?

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A drop of oil makes a circular ring in a water puddle. The radius of the oil ring expands at 1.5 cm...