[-GS-]

ahhhhhh sick thanks alot both of you guys, appreciate your help. This is the way i found out how to do it like 20 minutes ago, well i knew it before, but i didnt remember it all.

This is wat i did step by step,

h=-4.9t2+22.8t

Then i went ahead and completed the square which got me

h= -4.9 (t-4.65 + 5.405625 - 5.405625)
h= -4.9 (t-2.325)² + 26.4875625

and one of my friends told me that the height would be 26.4875625