Plz help I am stuck on number 4

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters .

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?

Question 13 (1 point) jerome is starting a new job. his contract states he will earn $42,000 the first year, and will get a 4% raise per year. which function s(x) represents jerome's salary after a certain number of years, x?