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Mathematics, 05.05.2020 02:18 unknownyobutt21

A cliff is 240 high. James three his phone from the top of the cliff at an initial velocity of 12 feet per second. It’s the height after being thrown is modeled by the equation h=-16t^2 + 12 t + 240. How long will it take for the phone to reach its maximum height? What will be the maximum height of the phone? How long will it take for the phone to shatter on the ground?

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