For which intervals below is the average rate of change of m(x) = -5x-3 less than -25? interval a 3 ≤ x ≤ 5 b 4 ≤ x ≤ 5 c 4 ≤ x ≤ 6

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 if no money is deposited or withdrawn except the service charge, how many months until the account balance is negative