A baseball is hit by a batter. The following function describes the height of the baseball as a function of time (t seconds after the ball was struck):
h = -16t^2 +48t+ 2
How many seconds after the ball was struck did it reach a maximum height?
a.
t-1 sec
b. t = 1.5 sec
c. 1-2 sec
d. t - 2.5 sec