The formula for the volume of a cone is given below. find the rate of change of the volume for each of the radii given below if dr/dt is 9 inches per minute and h = 24r.

v = (1/3)πr2h

a) r = 5 in

(b) r = 17 in

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.