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Mathematics 7 Online
OpenStudy (anonymous):

A fireworks display is launched from a platform 10 feet above ground with an initial upward velocity of 70 feet per second. The height of the fireworks above ground after t seconds is given by the equation h = –16t2 + 70t + 10, where h is the height of the fireworks in feet and t is the time in seconds after they are launched. What is the maximum height of the fireworks display, to the nearest foot? A. 87 feet B. 174 feet C. 70 feet D. 10 feet

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