Question

Q = Q0*e^(-t/r).. solve for t

Answer 1

\[Q=Q_0e^{-\frac{t}{r}}\]
\[\frac{Q}{Q_0}=e^{-\frac{t}{r}}\]
\[\ln(\frac{Q}{Q_0})=-\frac{t}{r}\]

Answer 2

thanks

Answer 3

yw