7. Sarah invested $150 at 8% simple interest. What is the total amount of money after 3 years? 8. Ben borrowed $800 at 9% simple interest for 2 years. What is the total amount he must repay? 9.Lindsey sold stationery to her family and her mother's friends. She deposited the $125 she earned in a savings account The account earns 5.18% interest annually. If she does not deposit or withdraw any money from for 18 months, how much will she have in her account? 10-13. Find the balance of the account earning compound interest annually. 10. $7000 at 2% for 4 years. 10. 11. $7000 at 4% for 2 years. 11. 12. $1995 at 6.5% for 10 years. 12. 13. $12.000 at 4.896 after 7 years 13