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douglas12

If a baseball is dropped from a helicopter 625 feet above ground, then its distance in feet form the ground t seconds later is modeled by -16t^2+625. How long after the ball is dropped will it hit the ground? A. 1.56 seconds B. 6.25 seconds C. 9 seconds D. 39.06 seconds

  • 9 months ago
  • 9 months ago

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  1. Mr.Mosterd
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    They are really asking \[-16t^{2}+625=0\].

    • 9 months ago
  2. douglas12
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    So how do you solve it then?

    • 9 months ago
  3. Mr.Mosterd
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    As you would any other quadratic equation. You'll get two solutions. A negative and a positive. You'll take the positive solution because time is positive.

    • 9 months ago
  4. douglas12
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    SO is the answer D

    • 9 months ago
  5. Mr.Mosterd
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    No, B

    • 9 months ago
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