Question

The height h, in feet, of a projectile t seconds after launch is modeled by the equation h = 32t – 16t2. How long after launch does the projectile return to the ground?

2 seconds
4 seconds
14 seconds
16 seconds

Answer 1

2

Explanation:

Answer 2

2

Explanation:

when it returns to the ground , h = 0

32t -16t2 = 0 and solve for t

t = 0, 2 ....0 is the start, 2 is when it returns