a = 4πr^2
da/dt = 8πr dr/dt
Now just plug in your numbers.
the radius r of a sphere is increasing at a rate of 3cm/min. find the rate of change of the area when r=3cm
4 answers
where did 8 come from
hello!?
the derivative of r^2 is 2r
4*2 = 8
?!?!?!??
the derivative of r^2 is 2r
4*2 = 8
?!?!?!??
ohhhh ya sorry I get it