No, you simply did not provide sufficient information. You did not say anything about a model of time and velocity as a parabola. You just said "parabola".

Now that you have provided useful information, this is an easily solved problem. Please make a practice of providing sufficient information up front, then you will not see things that are "too complicated". It is your previous attempt at simplifying that is the communication problem. Just provide the problem and show your work. That's all there is to it.

In the standard model, we have

Where:

y = the height of whatever object we are watching

t = time (usually in seconds)

g = Acceleration due to Gravity (Taken as positive to let the negative sign out front emphasize the direction.)

= Initial Velocity

= Initial Height

This brings us to the "Show Your Work" part.