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Mathematics 7 Online
OpenStudy (anonymous):

A model jet is fired up in the air from a 18-foot platform with an initial upward velocity of 56 feet per second. The height of the jet above ground after t seconds is given by the equation h=-16t^2+56t+18 where h is the height of the jet in feet and t is the time in seconds since it is launched. What is the maximum height the jet reaches, to the nearest foot? A.767 B.67 C.30 D.18

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