Two angles of a triangle have the same measure and the third one is 21 degrees greater than the measure of each of the other two. find the measure of the largest angle in the triangle.

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!