<PRE><B>Question 428731</B>
How many seconds will it take for an object dropped off the top of 555 ft Washingtin Monument to hit the ground. h=16tsquared - 64t?
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Solve -16t^2+64t+555 = 0
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t = [-64 +- sqrt(64^2-4*-16*555)]/(2*-16)
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t = 8.297872 seconds
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Cheers,
Stan H.</PRE>