Question

PLEASE HELP!!!!!! MEDAL TO RIGHT ANSWER! Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.
A rocket is launched from atop a 76-foot cliff with an initial velocity of 135 ft/s.
A.) Substitute the values into the vertical motion formula h=-16t^2+vt+c. Let h=0
B.) Use the quadratic formula find out how long the rocket will take to hit the ground after it is launched. Round to the nearest tenth of a second.
1.)0= -16t^2 + 135t + 76; 0.5 s
2.)0= -16t^2 + 135t + 76; 9 s,

Answer 1

After substitution your equation should be: 0= -16t^2+135t+76 and your answer to {A} would be {135 goes as V, 76 goes as C}. Question B is answered by soling the quadratic equation -16t^2+135t+76 = 0 Answer: 9.0s {the other solution is a negative }