1. The problem statement, all variables and given/known data P 1.2-4 2. Relevant equations I know that i(t) [current w/respect to time] = dq/dt. I also know that by the previous equation, q(t) = ∫i(τ) from -∞ to t (sec). 3. The attempt at a solution I understand simpler problems involving finding q(t) by using the integral relationship with i(t), but for this problem, I am confused on how to set my bounds for integration. My guess would be to integrate i(t) from t = 2 to 8 because that is the domain in which i doesn't equal zero. However, based on the answer (bottom of picture) I see the answer is in terms of t seconds. This is what is confusing me. I don't see how to solve this without just getting an integer. So, I guess my problem is that I don't know how to set up the integration. Can someone help explain to me how you would decide to set up the integration to find q(t) ? Thanks..I really am trying to understand this.