Each year, the population is multiplied by (1 +6%) = 1.06. After 8 years, it will have been multiplied by that value 8 times, so is 1.06^8 times the starting value.
81300 - 56800 = 24500....so she made 24500 in passive income for the year. We need per month, so we divide by 12 because there is 12 months in a yr. 24500/12 = 2041.67 per month
