Need help please

Question

A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time

launch, x in seconds, by the given equation. Using this equation, find the time that the rocket will hit the ground, to the nearest 100th of second. y=-16x^2+248x+94

Answer 1

Set y=0 and solve the resulting quadratic equation for x using the quadratic formula. You will get a positive and a negative solution. Since time starts at x=0, the positive solution is the correct one.