Kinematics Question

1. The problem statement, all variables and given/known data
I had a problem with e
http://img717.imageshack.us/img717/755/captureso.jpg [Broken]
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2. Relevant equations

see below

3. The attempt at a solution

So I assumed that there was no y component of velocity once the ball reaches it's lowest point. I believe this to be a very legit assumption. Even the scoring guidelines made this assumption.

The next thing that I did was use the velocity naught equation below that incorpates the velocity the acceleartion and the time in order to solve for the time

i didn't know the velocit though so i solved it using the equation velocity squared equation that incorporates the velocity naught the acceleration and the displacement which i knew all the terms and solved for the final velocity

i then solved for the time

i was then able to solve for the horizontal displacement sense the step before asked me to solve for the velocity naught in the x direction

The scoring guidelines confirmed my value i used for the horizontal velocity

http://img44.imageshack.us/img44/5169/capturej.jpg [Broken]
http://img502.imageshack.us/img502/8854/capture2fc.jpg [Broken]
http://img37.imageshack.us/img37/4259/capture3fo.jpg [Broken]
http://img686.imageshack.us/img686/9018/captureym.jpg [Broken]
1. The problem statement, all variables and given/known data
1. The problem statement, all variables and given/known data

so i really do not see what i'm doing wrong here....