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  • one year ago

a ball is thrown from an initial height of 5 feet with an initial upward velocity of 21ft/s . The ball's height h (in feet) after seconds t is given by the following. h=5+21t-16t^2 Find all values of t for which the ball's height is 11 feet. Round your answer(s) to the nearest hundredth. (If there is more than one answer, use the "or" button.)

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  1. anonymous
    • one year ago
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    i got t=.42,.89

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