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an object is launched from ground level with an initial velocity of 400 feet per second. To the nearest tenth off a second, how long does it take the object to reach a height off 650 feet?

  • math -

    h = Vo*t + 0.5g*t^2 = 650 Ft,
    400t + 16t^2 = 650,
    16t^2 + 400t -650 = 0,
    Use Quadratic Formula to find t:
    t = 1.53s.

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