An object is launched directly upward from 384 feet above the ground

Question

an object is launched directly upward from 384 feet above the ground. The height, h (in feet), of the object t seconds after being launched is given by the formula, h=16t^2 + 32t + 384. How long will it take the object to hit the ground.

Answer 1

when does it hit the ground?? 6 seconds

-16t^2 +32t +384 = 0

tolve for t, quadratic formula, complete the square, factor or graph