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Mathematics, 07.05.2021 17:00 olly09

Suppose a toy rocket is launched vertically upward from the top of a building with an initial velocity of 128 feet per second. if air resistance is ignored, the rocket's h height after t seconds is given by the equation h = −16t2 +128t + 100. How long will the rocket's flight last? (to the nearest tenth of a second) A)7.6seconds C)8.7seconds
B)7.9seconds D)9.3seconds

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