Physics

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The height of a rocket is launched from a platform 12 meters above the ground is modeled by the function h(t)=-4.9t^2+25t+12 where h(t) represents the height of the rocket in meters and t represents the number of seconds after launching. How many seconds after launching will the rocket return to the ground?

  • Physics -

    h(t)=0
    so
    4.9t^2-25t-12=0
    use the quadratic equation, solve for t.

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