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math

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If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 250, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest hundredth’s place; include units in your answer.

  • math - ,

    When the stone hits the , the heiht will be zero:
    -9.8t^2 - 10t + 250 = 0,
    Solve using the Quadratic Formula and
    get:

    t = -5.59 and 4.57s.
    Use positve value:
    t = 4.57s.

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