Answer
about $9$ weeks
Work Step by Step
Plug the values
$ c=0.06,$
$ A=12,$
$ N=5$
into the given formula and calculate t
$ t=\displaystyle \frac{1}{0.06}\ln(\frac{12}{12-5})=$8.983275$\approx 9$
It will take about 9 weeks.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.