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anonymous

  • 5 years ago

ugh I am bad a word problems I would love some help!! A person standing close to the edge on top of a 208 foot building throws a baseball vertically upward. The quadratic function s(t)= -16t2+64t+208 models the ball’s height above the ground, s(t), in feet, t seconds after it was thrown. How many seconds does it take until the ball finally hits the ground? Round to the nearest tenth of a second if necessary. amistre64 got 6.1 but I need to see how to work it PLEASE

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  1. amistre64
    • 5 years ago
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    -16(t^2 -4t -13) = 0 4 +- sqrt(4^2 -4(-13)) ------------------ 2 2 + sqrt(17) =abt 6.1231....

  2. anonymous
    • 5 years ago
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    thx u

  3. amistre64
    • 5 years ago
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    yw :)

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