Posted by Anonymous on Sunday, November 27, 2011 at 7:55pm.
d = Vo*t + 0.5g*t^2 = 180,
112t - 16t^2 - 180 = 0,
Divide both sides by 4:
28t - 4t^2 - 45 = 0,
-4t^2 + 28t - 45 = 0.
X = 2.5s. Use Quadratic Formula and use
the smaller of the 2 solutions.
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