Wednesday, December 23, 2009

The height h in feet of an object after t seconds is given by the function?

h=-16t^2+30t+7


How long will it take the object to hit the ground? Round the answer to the nearest thousandthThe height h in feet of an object after t seconds is given by the function?
H = 0 for the ground.


=%26gt; 0 = - 16t^2 + 30t + 7


=%26gt; 16t^2 - 30t - 7 = 0


=%26gt; t = (1/32) * [ 30 + 鈭?900 + 4*7*16)]


= 2.085 s.The height h in feet of an object after t seconds is given by the function?
to hit the ground therefore h=0





T=2.084847484. s
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