Help?? Anyone?? HELP Maybe?? A rocket is launched from atop a 102-foot cliff with an initial velocity of 158 ft/s. Substitute the values into the vertical motion formula h = –16t2 + vt + c. Let h = 0. Use the quadratic formula to find out how long after the rocket is launched it will hit the ground. Round to the nearest tenth of a second.

Choices are
9.2s
0.6s
3.1s
10.5s

Question

Help?? Anyone?? HELP Maybe?? A rocket is launched from atop a 102-foot cliff with an initial velocity of 158 ft/s. Substitute the values into the vertical motion formula h = –16t2 + vt + c. Let h = 0. Use the quadratic formula to find out how long after the rocket is launched it will hit the ground. Round to the nearest tenth of a second.

Choices are
9.2s
0.6s
3.1s
10.5s

turingtest · Answer

for equations of the form$$ax^2+bx+c=0$$ we have$$x={-b\pm\sqrt{b^2-4ac}\over2a}$$