I already how to properly set it up and execute the equation with natural log etc.
2/3q0 = q0e^(t/RC)
2/3 = e^(-t/tau)
ln(2/3) = -t/tau
t = -ln(2/3)tauThe problem should be trivial; however, -ln(2/3)tau is apparently incorrect. So is ln(3/2). Is there something I am missing?