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anonymous

  • 5 years ago

A boy standing on a 64 foot cliff drops a coin off the cliff. If the equation of the height h of the coin t seconds after it drops is h = -16t2 + 64, about how many seconds will the coin take to reach the bottom of the cliff? A. 1 second B. 1.5 seconds C. 2 seconds D. 2.5 seconds

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  1. anonymous
    • 5 years ago
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    What would be the value for h when it hits the ground?

  2. anonymous
    • 5 years ago
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    2 seconds im thinking rite?

  3. anonymous
    • 5 years ago
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    That's right. I assume you set the equation equal to 0, then added 16t^2 to both sides, then divided by 16 and took the square root of both sides?

  4. anonymous
    • 5 years ago
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    yep. I had a little help earlier... ^^ lol

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spraguer (Moderator)
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