Please Help! Multiple Choice!

Projectile height is modeled by the function h(t) = -16t^2 + v0t + h0 where t is the time in seconds, v0 is the initial vertical velocity, and h0 is the initial height.


A football is kicked from ground level with an initial vertical velocity of 48 ft/s. How long is the ball in the air?

A. 3 seconds
B. 10 seconds
C. 5 seconds
D. 8 seconds