In Mr. Martin's class, there are 16 students who are 12-years old and 8 students who are 13-years old. What is the unit rate of 12-year olds to 13-year olds?

As a salesperson you get $50/day and $3.60/each sales you make.if you want to make $60 in one day, how many sales would you need need to make ? a 3b 4c 5d 6 show work.