A = π r^2
dA/dt = 2π r dr/dt
given: dA/dt = 3 , find dr/dt when r = 2
3 = 2π (2) dr/dt
dr/dt = 3/(4π) cm/s
the area of a circle increasing at the rate of 3cm/sec.find the rate of change of the circumference when the radius is 2cm
help plz
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