+54 1. Find the annual rate (written as a percent) on a loan of 1950 dollars for 2 years and 9 months if the simple interest earned is 321.75 dollars. Fill in the blank of the answer sentence: The annual rate is _____ percent.
2. Donald Duck needs to repay his car loan. He needs to repay 2680.00 dollars. If the simple interest of the loan was 8.5% for 4 years, find the principal (original amount that Donald borrowed.) Fill int he blank of the answer sentence: Donald Duck borrowed $__________.
3. Hugo invested 4500 dollars, part at an annual interest rate of 7% and the rest at an annual rate of 15%. How much did he invest at the 7% rate if his total income on the investment for one year was 475 dollars? Fill in the blank of the answer sentence: Hugo invested $_______ at the 7% interest rate.
