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Answer the following simple interest questions:

1. Jeff borrowed $25 from his dad to buy a fishing license and promised to pay his dad back in one month. His dad agreed, but said that Jeff must pay 15% annual interest. How much interest will Jeff pay?

2. Anna Maria applied for and received a loan to pay for college. She borrowed $25,000. She must pay the loan back in five years with annual interest of 4%. How much money will she pay when she pays off the loan?

3. Daunell purchased a new TV on September 15th. The cost of the TV was $2,750 and she has until January 15th to pay that amount to the retailer. The retailer has added 21% annual interest to the price of the TV. When Daunell pays off the TV on January 15th, how much will she pay?

4. Joe bought a boat from his brother on March 1st with a promise to write a check for the price of the boat, $5,000, on March 4th. On March 2nd Joe lost his job so his brother said he could pay the money when he found a new job. Six months later Joe still didnt have a job, but he was tan from a lot of water skiing. Joes brother said that Joe needed to pay for the boat in 3 months at 5% annual interest. How much will Joe pay his brother in 3 months?

5. Mary borrowed $5 from her older brother and paid him back $7 dollars three days later. What annual interest rate did her older brother charge her?

6. Rachel, Marys sister, also borrowed money from her older brother. She repaid him $10 three days after he loaned her money. He charged her 75% annual interest. What amount did Rachel borrow?

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