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Mathematics 11 Online
OpenStudy (anonymous):

A model jet is fired up in the air from a 20-foot platform with an initial upward velocity of 68 feet per second. The height of the jet above ground after t seconds is given by the equation 2003-18-06-00-00_files/i0290000.jpg, 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?

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