Can someone please help me with this

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!

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Which function has the domain x> -11