Ajewelry store is having a 50% off sale for all necklaces. during this sale, what is the cost of a necklace that regularly costs $49.98?

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!