Paint is poured onto a flat surface and a circular patch is formed. The area of the

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Paint is poured onto a flat surface and a circular patch is formed.
The area of the patch increases at a rate of 5cm2s−1.
a. Find, in terms of π, the radius of the patch after 8 seconds.
b. Find, in terms of π, the rate of increase of the radius after 8 seconds

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