21. Gerold invested $6,200 in an account that pays 5 percent simple interest.
21. Gerold invested $6,200 in an account that pays 5 percent simple interest. How much money will he have at the end of ten years? A. $8,710 B. $9,000 C. $9,300 D. $9,678 E. $10,099 22. Alex invested $10,500 in…