a(t) is the accumulation function for the time period

yes it related to it

An account has a nominal interest rate of 2% convertible monthly nominal rate of discount was 3% payable semiannually for the ne of interest was 4.2% compounded once every two years to effective rate of discount was 0.058 after that. hly for the first three years, the next two years, the nominal rate four years, and the annual y two years for the next four years, and a) Find a(t) b) Use your answer from part a) to find the accumulated value of $2480 after 1 Find v(1) Find the value of the account at time 3 if the value of the account is S5000 An account has a nominal interest rate of 2% convertible monthly nominal rate of discount was 3% payable semiannually for the ne of interest was 4.2% compounded once every two years to effective rate of discount was 0.058 after that. hly for the first three years, the next two years, the nominal rate four years, and the annual y two years for the next four years, and a) Find a(t) b) Use your answer from part a) to find the accumulated value of $2480 after 1 Find v(1) Find the value of the account at time 3 if the value of the account is S5000