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16 January, 22:40

If a ball is thrown directly up at 30 meters per second, its height (in meters) after t seconds is given by h (t) = 30t - 5t^2. What is the maximum height (in meters) attained by the ball?

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  1. 16 January, 23:30
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    45m

    Step-by-step explanation:

    t = - 30 / (-2*5) = 3

    Max height at t = 3

    30 (3) - 5 (3) ² = 45m
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