SOLUTION: The equation h=-4t^2+16t+1.5 describes the path of a football, where t is the time in flight in seconds and h is the height of the football in metres.
How long is the football i
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-> SOLUTION: The equation h=-4t^2+16t+1.5 describes the path of a football, where t is the time in flight in seconds and h is the height of the football in metres.
How long is the football i
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Question 322212: The equation h=-4t^2+16t+1.5 describes the path of a football, where t is the time in flight in seconds and h is the height of the football in metres.
How long is the football in the air (to the nearest second)? Found 2 solutions by stanbon, solver91311:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The equation h=-4t^2+16t+1.5 describes the path of a football, where t is the time in flight in seconds and h is the height of the football in metres.
How long is the football in the air (to the nearest second)?
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The height is zero when the ball hits the ground.
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Solve -4t^2+16t+1.5 = 0
Quadratic Formula:
t = [-16 +- sqrt(16^2-4*-4*1.5)]/-8
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t = [-16 +- sqrt(280)]/-8
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Positive solution:
t = [-16-sqrt(280)]/-8
t = 4.0917 seconds
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Cheers,
Stan H.
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