I dont think is that hard haha please help lol Deandre deposits $400 into an account that pays simple interest at a rate of 6% per year. How much interest will he be paid in the first 4 years?

Agroup of five people go out to eat and buy appetizers and main dishes they decide to split the bill so each person pays 20% of the total cost appetizers are $5 and main dishes are $10 write an expression to show how much each person pays explain it with how to solve the problem