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Mathematics, 26.09.2019 23:30 KarenH3512

Atoy rocket is shot vertically into the air from a launching pad 9 feet above the ground with an initial velocity of 168 feet per second. the height h, in
feet, of the rocket above the ground as t seconds after launch is given by the function h(t)=-16t^2+168t+9. how long will it take the rocket to reach its maximum height? what is the maximum height?

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