Someone plz help meee

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.