andyvalen18 andyvalen18

05-07-2017
Mathematics

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A ball is thrown from an initial height of 4 feet with an initial upward velocity of 17ft/s. The ball's height h (in feet) after t seconds is given by the following h=4+17t-16tsquare. Find all values of for which the ball's height is 8 feet

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marycaresmuch marycaresmuch

05-07-2017

Use quadratic formula
8= 4 +17t -16t^2
16t^2 - 17 t + 4
answers (17 + square root (33)) /32 and (17 - square root (33)) /32

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