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Ed hits a shot off the tee that has a height modeled by the function f(t) = -16t2 + 112t. How long is the ball in the air?

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  • Alan
    Lv 7
    1 month ago
    Favorite Answer

    it hits the ground when f(t) =0 

    f(t) = -16t^2 + 112t  

    factor 

    f(t) =  -16t( t-7)    

    -16t = 0 seconds

    t = 0 

    (t-7) =0 

    t = 7  seconds

    so 7 seconds  

  • Jim
    Lv 7
    1 month ago

    The height is -16t² + 112t, and we want 0 feet.

    0 = -16t² + 112t

    0 = -16t (t - 7)

    t must then be 0 or 7 sec to be at ground level.

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