Question 21, 22, & 23

A street light is at the top of a 19 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 8 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 ft from the base of the pole? ft sec Question 22 0/1 pt 9 2 0 Details If 1800 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box. Volume = cubic centimeters. Question 23 0/1 pt 9 2 0 Details Let y = tan(4x + 6). Find the differential dy when x - 4 and dr = 0.3 Find the differential dy when z = 4 and de = 0.6