1. The problem statement, all variables and given/known data A 4.1e-6 capacitor is connected in series with a 36V battery and a 851 ohlms resistor. At t= 0 the capacitor is uncharged. At what time will the capacitor have 80% of its maximum charge? 2. Relevant equations I = V/R Q = CV I = Q/t 3. The attempt at a solution I didn't learn RC circuit much in class since my teacher ran out of time. But anyway, So the first thing I did is I found the current which is, I = .0423 A Now I'm stuck on this one. I = Q/t I need to find t, I tried to use .0423 = Q* (.8) / t but the problem is Q is unknown. Any ideas?