a pebble is dropped into a calm pond, causing ripples in the form of concentric circles. the radius r of the outer ripple is increasing at a constant rate of 1 root per second. When the radius is 4 feet, at what rate is the total area A of a disturbed water changing?

Question

Thank you!

bobpursley · Accepted Answer

area=pi r^2 darea/dt=pi*2*r*dr/dt is there something here you do not understand?

Writeacher · Answer

Fay/Grace/Alice/Mark -- You need to show some work on what you've posted. Otherwise, the math tutors will think you just want to copy the answers down.