Question

The function h(t)=16t^2+28+500 represents the height of a rock t seconds after it is propelled by a slingshot. What does h(3.2) represent ?

Answer 1

t is the amount of time in seconds that the rocket is in the air.

in h(3.2), they want you to replace h with 3.2, so you would find the height of the rocket 3.2 seconds after it was propelled.