Asked by Marilyn
A circular oil slick floats on the surface of still water. Its area is increasing at a rate of 10m^2/min. At what rate is the radius (r metres) increasing?
Answers
Answered by
Steve
a = pi r^2
da/dt = 2pi r dr/dt
Now plug in your numbers
da/dt = 2pi r dr/dt
Now plug in your numbers
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