PLEASE ANSWER! Melody paid off a loan of $120,000 in 10 years. If she made a payment of $1,225 each month, then what was the simple interest rate for her loan?

Problem 3 a bank charges a service fee of $7.50 per month for a checking account. a bank account has $85.00. if no money is deposited or withdrawn except the service charge, how many months until the account balance is negative