The switch in the figure has been closed for a very long time.
(a) What is the charge on the capacitor?
(b) The switch is opened at t = 0 s. At what time has the charge on the capacitor decreased to 10% of its initial value?
The Attempt at a Solution
So, I know that the circuit is initially closed, and I don't need current to solve. Also that I probably need to combine resistors because they are in series. Yet, I'm a little confused as how to set up the problem.
Any type of help or insight would be deeply appreciated.