Amanda is investing at a rate of 2% annually for 3 years, hence we will use the Future value formula here for the correct answer of the investment after a period of 3 years.
Future Value = Present value * (1 + interest)^years
You just need to divide the yearly salary by the number of weeks per year to get
48000/52 weeks=923 is the amount that she should spend no more than one week's pay which is the maximum amount per month that she can spend on rent.
