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

Question

anonymous · Answer

What would be the value for h when it hits the ground?

anonymous · Answer

2 seconds im thinking rite?

anonymous · Answer

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?

anonymous · Answer

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