Radius of medium circle

Is it true or false i’m trying to pass this test so i can leave school

For what values of x is x2 + 2x = 24 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!