Your savings account has a balance of $5435.55.You opened the account 5 years ago. Interest on the account is compounded weekly at an annual interest rate of 4.5%. How much did you invest originally?
+36916 period = 1 week
# periods in 5 years = 5 * 52 = 260 periods
interest per period = .045 / 52
5435.55 = orig * ( 1 + .045/52)260
orig invest = 4340.80
