Adam and Eve started working at Eden, Inc. on the same day. Their starting salary was $40,000. Adam receives a pay raise of $2000 each year, while Eve's pay raises start at $10 a year and triple each year. After how many years will Eve have a higher salary than Adam?

A salesman works for a base salary of $370 a month plus 5% commission on all the merchandise he sells beyond $4,000. If he sells $6,500 worth of merchandise in one month, what will his total salary be for the month?

A couple invested $20,000 in two retirement accounts, one at an annual simple interest rate of 4% and the other at 3% annual simple interest. The combined interest from the two investments was $740 for the first year. Find the amount invested in each account. $ invested at 4% 2$ invested at 3%