Regarding a DC circuit with a capacitor.
I have obtained an expression for the capacitor voltage:

Vc(t) = 4 + 2e^-150t

How do determine the capacitor current?

I know that i = C * dv/dt, but not sure how to apply it.

Any tips?

 

As the formula suggests, differentiate the voltage to get to the current.
Namely: \( i=C\cdot \frac{d(4+2e^{-150t})}{dt}\). Can you handle that?

 

Just about

 

Glad to hear so!