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A rocket is launched from the top of an 80-foot cliff with an initial velocity of 150 feet per second. The​ height, h, of the rocket after t seconds is given by the equation h equals negative 16 t squared plus 150 t plus 80. How long after the rocket is launched will it be 20 feet from the​ ground?

A rocket is launched from the top of an 80foot cliff with an initial velocity of 150 feet per second The height h of the rocket after t seconds is given by the class=


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