SOLUTION: Elena throws a ball into the air from a building. The equation h= -16t^2 +32t+48 gives the height h of the ball t seconds after it is thrown. When does the ball hit the ground?

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Elena throws a ball into the air from a building. The equation h= -16t^2 +32t+48 gives the height h of the ball t seconds after it is thrown. When does the ball hit the ground?      Log On


   

Question 688798: Elena throws a ball into the air from a building. The equation
h= -16t^2 +32t+48 gives the height h of the ball t seconds after it is thrown. When does the ball hit the ground?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Elena throws a ball into the air from a building. The equation
h= -16t^2 +32t+48 gives the height h of the ball t seconds after it is thrown. When does the ball hit the ground?
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When h(t) = 0
-16t^2 +32t+48 = 0
Solve for t.
Ignore the negative solution.