Distance traveled by projectile

1. The problem statement, all variables and given/known data
Suppose you have a projectile of 120g.
Suppose that projectile is accelerating at 9186.05 m/s/s for 0.129 seconds, to a velocity of 12150 m/s.
Factoring in a 20% drop in Velocity from aerodynamics and friction, it accelerates to roughly 9750 m/s.

What distance did the projectile travel in the 0.129 seconds that it was accelerating? Please provide relevant units of measurement.

2. Relevant equations

3. The attempt at a solution
I plugged everything into the above equation, but I don’t feel like it is a realistic value, and I’m not sure of what unit is used (m, km, cm, etc…)


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