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31 July, 16:57

A toy rocket is shot vertically into the air from a launching pad 9 feet above the ground with an initial velocity of 80 feet per second. The height h, in feet, of the rocket above the ground at t seconds after launch is given by the function h (t) = -16t^2+80t+9. How long will it take the rocket to reach its maximum height?

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  1. 31 July, 19:12
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    Step-by-step explanation:

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