1. The problem statement, all variables and given/known data A particle's acceleration is given by the equation a(t) = 2t + 1 m/seg^2. If its velocity at t = 2 equals 5 m/seg, how much does its displacement change from t = 2 to t = 4? 2. Relevant equations 3. The attempt at a solution I thought I could integrate the acceleration equation to get the velocity equation, but when I solve this equation for t = 2, I don't get 5 m/seg as the problem states. Here's the equation I came up with: v(t) = t^2 + t Should I add a -1 to the end so the equation satisfies the premise?