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February 28, 2015

February 28, 2015

Posted by **Rutba** on Sunday, October 28, 2012 at 2:05pm.

- Math -
**Steve**, Sunday, October 28, 2012 at 8:54pmsolve for t in

45 = -5t^2 + 50t

5t^2 - 50t + 45 = 0

t^2 - 10t + 9 = 0

(t-9)(t-1) = 0

it will reach 45m on the way up at t=1, and on the way back down at t=9.

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