SOLUTION: Please help me solve this Allen uses a slingshot to shoot a marble from a window. The height of the marble h(t) in feet at time (t) seconds is given by h(t)=-16t^2-62t+188. How

Algebra ->  Graphs -> SOLUTION: Please help me solve this Allen uses a slingshot to shoot a marble from a window. The height of the marble h(t) in feet at time (t) seconds is given by h(t)=-16t^2-62t+188. How      Log On


   



Question 514405: Please help me solve this
Allen uses a slingshot to shoot a marble from a window. The height of the marble h(t) in feet at time (t) seconds is given by h(t)=-16t^2-62t+188.
How many seconds elapse before the marble hits the ground? Thank you.

Found 2 solutions by stanbon, solver91311:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
h(t)=-16t^2-62t+188.
How many seconds elapse before the marble hits the ground?
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Solve -16t^2-62t+188 = 0
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-8t^2-31t+94 = 0
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t = 2 seconds
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Cheers,
Stan H.

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


The ground is height zero, so set and solve for



Solve for and exclude any negative root. Hint: It factors -- 16 times -1 is -16, 16 times 2 plus -1 times 94 is -62, and 94 times 2 is 188.

John

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