The equation is h=-16t²+40t+5.The ball will hit the ground when h=0. So:
0=-16t²+40t+5
16t²-40t-5=0
Using the quadratic formula, we get a positive value for t of <span>2.61930639376 seconds.
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3 + 1/9 = 27/9 + 1/9 = 28/9
2 + 2/5 = 10/5 + 2/5 = 12/5
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So:
[3+(1/9)]/[2+(2/5)]
=(28/9)/(12/5)
=(28/9)*(5/12)
=140/108 = 70/54 = 35/27
The length of the smaller rectangle at the right is 1 inch less than twice its width. Both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle.
It would take him 7.5 hours to do it himself
