Suppose that a bottle rocket is launched upward with a initial velocity of 96ft/sec from a height of 880ft. Its height is h, in feet, after t seconds is given by h(t)=-16^2 + 96t + 880. After how long will the rocket reach the ground?
When rocket hits ground , height =0
0 = -16 t2 + 96t + 880 Quadratic formula to find t.... throw out negative t value