Hi everyone!

So here is my question:

The currents of the terminals in the terminals of the element in Fig. 1.5 (I attached a picture) is:

i = o, t < 0

i = 20 e^{-5000 }t ≥ 0

Calculate the total charge (in microcoulombs) entering the elemnet at its upper terminal.

I am a bit confused because I know the forumla i = dq/dt, but I am not given any "t" here.

Can anyone help? Thank you very much!