SOLUTION: 7. The path of a paper airplane can be modeled approximately by the function h= -0.3t^2 + t + 1.5 , where h is the height above ground, in metres, and t is the time in seconds. De

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: 7. The path of a paper airplane can be modeled approximately by the function h= -0.3t^2 + t + 1.5 , where h is the height above ground, in metres, and t is the time in seconds. De      Log On


   

Question 1159605: 7. The path of a paper airplane can be modeled approximately by the function h= -0.3t^2 + t + 1.5 , where h is the height above ground, in metres, and t is the time in seconds. Determine how long it takes for the paper airplane to hit the ground.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
h= -0.3t^2 + t + 1.5
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-0.3t^2 + t + 1.5 = 0
Solve for t