Question 1123270
f = p * (1 + r) ^ n


f is the future value
p if the present value
r is the interest rate per time period
n is the number of time periods


in your problem.


p = 50
f = what you want to find
n = 6 * 52 = 312 weeks
r = 2.8% / 100 / 52 = .0005384615385


formula becomes f = 50 * (1 + .0005384615385) ^ 312


solve for f to get:


f = 59.1441563


the percent interest rate is divided by 100 to get the interest rate per year.


the interest rate per year is divided by 52 to get the interest rate per week.


the number of years is multiplied by 52 to get the number of weeks.