Can someone help me please

Which statements about these triangles is true

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!

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?