A football is kicked vertically upward from a height of 7 feet with an initial speed of 75 feet per second. The formula h=7+75t-16t² describes the ball's height above the ground, h, in feet, t seconds after being kicked.

What is the maximum height reached by the ball?

a) 387.5 feet
b) 175 feet
c) 387.5 meters
d) 175 meters