The height of a firework launched straight up from the ground is given by the equation h()=-16+144r, where r is the time in seconds. Find the average rate of change in the height of the firework from when it reaches its maximum height until when it reaches the ground. A) -58 ft/sec making a video B) -72 ft/sec singing the ABCs C) -36 ft/sec D) -64 ft/sec E) -48 ft/sec whistling playing poker bowling