A Model Rocket Is Launched from a Raised Platform at a Speed

Multiple Choice

A model rocket is launched from a raised platform at a speed of 112 feet per second. Its height in feet is given by $h ( t ) = - 16 t ^ { 2 } + 112 t + 20$ (t = seconds after launch) What is the maximum height reached by the rocket?

A) 216 feet
B) 432 feet
C) 108 feet
D) 236 feet