Maureen has 5 rolls of pennies containing 50 coins each, 3 rolls of nickels containing 40 coins each, 6 rolls of dimes containing 50 coins each, and 4 rolls of quarters containing 40 coins each. how much money does she have?

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!