Sand falls from an overhead bin and accumulates in a conical pile with a radius that is always four times its height. Suppose the height of the pile increases at a rate of 1 cm is when the pile is 13 cm high. At what rate is the sand leaving the bin at that instant? A 5.5-foot-tall woman walks at 9 this toward a street light that is 33 ft above the ground. What is the rate of change of the length of her shadow when she is 17 ft from the street light? At what rate is the tip of her shadow moving