With what speed (in m/s) did she leave it? (Round your answer to at least three significant figures.) (d) To what height (in m) did she jump upon leaving the floor?

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Starting from rest, a 64.0 kg woman jumps down to the floor from a height of 0.800 m, and immediately jumps back up into the air. While she is in contact with the ground during the time interval
0 < t < 0.800 s,
the force she exerts on the floor can be modeled using the function
F = 9,200t − 11,500t2
where F is in newtons and t is in seconds.
 
(c)
With what speed (in m/s) did she leave it? (Round your answer to at least three significant figures.)
(d)
To what height (in m) did she jump upon leaving the floor?
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