Question 459628
The height, in feet, of an arrow is given by the equation 
h(t) = -16tsquared +70t +7 where "t" is in seconds. 
How long will it take for the arrow to hit the ground? 
Please round your solution to the nearest tenth of a second.
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Height is zero when the arrow hits the ground.
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-16tsquared +70t +7 = 0
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t = [-70 +- sqrt(70^2-4*-16*7)]/(-32)
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t = [-70 +- sqrt(5348)]/(-32)
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Positive solution:
t = 4.47 seconds
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Cheers,
Stan H.
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t = [