SOLUTION: A six foot tall person drops an object from the top of a building that is 723 feet tall. The height of the "H" of the object after "T" seconds is given by the equation H = -16T + 7

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Question 34384: A six foot tall person drops an object from the top of a building that is 723 feet tall. The height of the "H" of the object after "T" seconds is given by the equation H = -16T + 729. FInd how many seconds it will take the object to reach the ground.
I got an answer of 45 seconds but I don't think it is correct. can you show me how to work this out.
Answer by hydromojo(20) About Me  (Show Source):
You can put this solution on YOUR website!
They've tried to confuse you with the 'six foot person'
You have H = -16T + 729 , where H is the height of the object from the ground.
When the object has hit the ground, H=0, so the formula becomes
0 = -16T + 729,
solving for T, you get 45.56sec