You have half time because thats when its at maximum height. The answer should've read:
y = 5.39 X 0.55 + 1/2 (-9.8)(0.55)2
y = 1.48m
edit: ok i read the question again, i have no idea what's going on.
I hate iPods, if I could go back in time I'd get an iRiver. My battery died and as a result i've murdered the sides of the case trying to pry it open because i refuse to pay apple $199 (or however much it is) for a refurshable iPod.
My physics teacher was an idiot who just told us to summarise the textbook after giving a shit explaination. Glad he's leaving, but probally means we'll get someone worse.