A 6-foot-tall man walks away at the rate of 4 ft/sec from the base of a street light 12 feet above ground. At what rate is the length of his shadow changing when he is 20 feet away from the base of the light? At what rate is the tip of his shadow moving

Billy Joe Mccallister jumped off the Tallachatchie Bridge, 70 ft above the water with a bungee cord tied to his legs. If he was 6 ft above the water 2 sec after jumping then what was the average rate of change of his altitude as the time varied from 0 to 2 sec?

A street light is at the top of a 16 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 5 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 50 ft from the base of the pole? ft sec

A kite travels upwards at 30 mph, while a kid runs away at 6mph. What rate is the distance between the kid and the kite changing 5 minutes later?