The height of a firework launched straight up from the ground is given by the equation h(t) = -16t² + 144t, where 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 B) -72 ft/sec C) -36 ft/sec D) -64 ft/sec E) -48 ft/sec
