Question 1060741
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carol tosses an apple from a balcony to her friend standing on the ground below. the formula h=-16t squared +72t+40 gives the height, 
h, of the apple in feet t seconds after being tossed. when will the apple hit the ground? (hint height of the apple when it hits the ground will be 0)
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t is the positive root of this equation 

{{{-16t^2 +72t+40}}} = 0.


Solve by any way you know (use quadratic formula, for example) to get the answer: t = {{{1/2}}} = 0.5 second.
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