What Amount of Interest Will Be Charged on $20 000

John buys a car for $20 000 on Kia finance with a simple interest of 5.99%.After one month he pays off the Kia finance using his secured line of credit which charges him 4% simple interest.He pays off the line of credit in 11 months.How much did he pay in total? A)$20 737 B)$20 837 C)$20 733 D)$20 800 E)$21 198

Interest of $429.48 was charged on a loan of $9500 over a period of 7 months.What simple rate of interest was charged on the loan? A)4.52% B)2.64% C)7.75% D)3.48% E)4.38%