Easy question, Easy points

Topic: Volume

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

Which of the following is not a subset of {1,2,3}?

What is the slope of the line that contains the points (-5, 6) and (14. - 7)?