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August 30, 2014

August 30, 2014

Posted by **Melissa** on Monday, October 17, 2011 at 10:28pm.

a) Determine the max height of the ball

b) how long does it take for the ball to reach its max height

c) How high is the rooftop

- Math( help please ! ) -
**Steve**, Tuesday, October 18, 2011 at 4:39amy = 5(10 + 4t - t^2)

max height achieved where t = -b/2a = 2

y(2) = -5(4) + 20(2) + 50 = 70

as above, when t=2

The rooftop is the ball's initial height. That is, when t=0. So, 50 ft.

- Math( help please ! ) -
**Melissa**, Tuesday, October 18, 2011 at 8:37amthank you so much

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