Solve the Problem $$h ( t ) = - 16 t ^ { 2 } + 112 t$$

Multiple Choice

Solve the problem.
-If an object is thrown straight upward from the ground with an initial speed of 112 feet per second, then its height, h, in feet after t seconds is given by the equation $$h ( t ) = - 16 t ^ { 2 } + 112 t$$ Find the instantaneous speed of the
Object at t = 6.

A) 112 ft/sec
B) -464 ft/sec
C) -80 ft/sec
D) 16 ft/sec