The capacitor C = 3.00 microF at t = 0 has a stored energy U0 = 1.67 x 10^-7 J. At t = 0 the switch S is closed and the capacitor discharges through resistor R = 8700 Ohms. What's the initial charge of the capacitor? I'm doing q0 = iRC. I'm stuck on finding what the current through the circuit is.