1. The problem statement, all variables and given/known data Find the average current. The problem and given solution are in Untitled.png. 2. Relevant equations RMS = sqrt((1/T)(integral of x^2 dt from 0 to T)) 3. The attempt at a solution From time 0 to 1, the equation describing current is 10t^2. From time 1 to 2, the equation describing current is 0. So RMS = sqrt((1/T)integral(10t^2 dt from 0 to 1)) + sqrt((1/T)integral(0 dt from 1 to 2)), where I use T = 1 for both T's because the 10t^2 occurs over 1 second, and the 0 amps also occurs over 1 second. But I get the wrong answer... Where did the book answer get 1/2 for the coefficient?