Kinematics problem, don't know how to find unknown variables

[Physicsnoob10]

Homework Statement

A rocket is shot straight up with an initial speed at 500 m/s.

Homework Equations

The equations the teacher went over beforehand were

Y_f = 1/2 A(T)^2 + V_i(T) + Y_i
V_f = A(T) + V_i

The Attempt at a Solution

So far I have

V_f = (-9.8)(T) + 500 m/s
Y_f = 4.9T² + 500T + 0

...and I have no idea how to go about solving for the rest of the unknown variables. It seems like I need T somehow, but I don't know how I can get it from the information given.

 

[azizlwl]

What is the question?

 

[Physicsnoob10]

Oh, sorry. Guess I didn't make that clear. You basically just have to find all the variables in the equations.

 

[azizlwl]

I still do not know what is the question.
If you have a rocket with velocity of 500m/s, you can be anywhere in this universe.
Maybe on any planet.