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Mathematics, 11.02.2021 22:40 leelee85503

The height, h, of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 90 feet per second is given by the equation h = 3 + 90t – 16t2 where t = time in seconds. After how many seconds will the ball be 84 feet above the ground?

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