A space vehicle accelerates uniformly from 70 at t = 0 to 172 at t = 10.0. How far did it move between = 2.0 and = 6.0 ?

Question

So I used the forumla d=vt+.5a(t)^2

but for a i got 10.2 since a=(172-70)/10

Now im stuck for v, what do i put for v?

Answer 1

no units, no sense.