See picture for steps and answer
Because every number with the decimal point have a zero infinit so it's not matter they're are same
For this case we have an equation of the form:

Where,
h0: initial height
v0: initial speed
a: acceleration
Substituting values we have:

Rewriting we have:

Note: see attached image
Answer:
Hope it's 30. .....................
I would say the answer is 8.25