Math algebra help

Question

A soccer ball is kicked upward from the ground with a speed of 96 feet per second. Its height h, in feet, after t seconds is given by the equation h(t)= -16t^2 + 96t

How long will it take for the soccer ball to return to the ground?

Answer 1

At the ground, y = 0.

-16t² + 96t = 0

-16t(t - 6) = 0

t - 6 = 0

t = 6