Please help me, I'm super confused right now TwT: Find the period.
Principal = 9300 rupees
Annual rate of interest = 13%
Total amount = 17,763
Period = years

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same