The function h(t) = –16t2 + 28t + 500 represents the height of a rock t seconds after it is propelled by a slingshot.
A
the height of the rock 3.2 seconds before it reaches the groundB
the time it takes the rock to reach the ground, or 3.2 secondsC
the time it takes the rock to reach a height of 3.2 metersD
the height of the rock 3.2 seconds after it is propelled