What is the difference in the total amount of interest earned on a 1000 investment after 5 years with compounding interest quarterly versus compounding interest monthly in Activity 10.5?

The difference in the total amount of interest earned on a 1000 investment after 5 years with quarterly compounding interest versus monthly compounding interest in Activity 10.5 is due to the frequency of compounding. Quarterly compounding results in interest being calculated and added to the principal 4 times a year, while monthly compounding does so 12 times a year. This difference in compounding frequency affects the total interest earned over the 5-year period.