SOLUTION: h=-16t^2+112t+144.Where t is the time in seconds after it was propelled. when does it hit the ground?

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: h=-16t^2+112t+144.Where t is the time in seconds after it was propelled. when does it hit the ground?       Log On


   

Question 321477: h=-16t^2+112t+144.Where t is the time in seconds after it was propelled. when does it hit the ground?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: It hits the ground when h=0. So plug this in to get 0+=+-16t%5E2%2B112t%2B144 and use the quadratic formula to solve for 't'.