1. The problem statement, all variables and given/known data Question is here 2. Relevant equations Shown in the image, but just to restate: Vc(t) = A+Be^(-t/τ) n/m=e^-1 OR p/m=1-e^-1 3. The attempt at a solution First thing I tried to do was solve the Vc(t) equation for e, which comes out to e=(-A/B)^(-τ/t). I'm not even sure if that's relevant, though, or where to take it from there if it is. I'm a little lost on how to proceed with this.