Final answer:
To retire the bonds, calculate the future value of the profits placed in Bank A and Bank B. If Bank B offers a higher return, place the remaining money in Bank B and calculate its worth in 10 years.
Step-by-step explanation:
To calculate how much money is needed to retire the bonds in 10 years, we need to consider the interest rates offered by Bank A and Bank B. Bank A pays 6% compounded quarterly, while Bank B pays 61.5% compounded annually. To determine which bank to recommend, we can calculate the future value of the profits placed in each bank after 10 years.
Bank A: Future Value = Principal * (1 + interest rate/n)^(n*t)
Bank B: Future Value = Principal * (1 + interest rate)^t
By comparing the future values, we can determine which bank offers a higher return. If Bank B offers a higher return, the remaining money can be placed in Bank B and we can calculate its worth in 10 years using the future value formula.