Uh, no, not quite. There's really no such thing as "final, total acceleration". There is either the instantaneous
acceleration, at a single point or instant of time -- or there is the average acceleration between two points. I'm guessing you mean the latter, so you would use the definition of average acceleration:
aavg = (V - Vo) / t
You have to pay attention that the V
's are vectors
; don't simply subtract the two numbers, you have to account for the directions of V
since they are vectors.