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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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

Mathematics
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What would be the value for h when it hits the ground?
2 seconds im thinking rite?
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?

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yep. I had a little help earlier... ^^ lol

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