9. How many ways can 3 paintings be selected out of 8 available? B. Business Problems. Round answers to the nearest cent. Box answers. 1. I $4,500 is loaned for 6 months at a rate of 7.5% annual rate, how much interest is earned? 2. A loan of $15,000 was repaid at the end of 8 months. What amount (principal and interest) was ropaid, if 7.9% annual rate of interest was charged? 3. Relative to problem #2, what was the interest on the 15,000 loan