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38. At the end of a month, your credit card account has a balance of $856.10. You calculate the average daily balance on the account to have been $844.29. Your bank charges you 0.99% interest per month on your average daily balance. a. How much interest will the bank charge you on your account for this month? b. Calculate your new balance after the bank adds its interest charge to your account. c. What is the annual interest rate you are paying on this account? Math 154 Final Exam Version 1 (130 points) Name Chapters 1, 2, 3, 4, 5, 6, 7 2021 April 28 John Scalea Page 9 39. In order to buy a house, you need to take out a loan for $469,000. You have arranged with a lender to borrow the money at an interest rate of 4.2% for a term of 30 years. You will make monthly payments of $2,293.49. If you do not pay off the loan early, how much interest (in dollars) will you have paid by the time you make your last payment? 40. For your retirement, you have decided that you want to save enough money so that you can simply ( old wi bloe live off the interest. You are interested in an annual income of $72,000 ($6,000 per month) and you believe that your retirement fund can earn interest at a rate of 6% per year. How much money do you need to save before you can retire under this plan? 41. The following piece-wise function summarizes the tax levied by the United States government on the adjusted gross income earned by unmarried taxpayers in 2020. 1 0.10x if x 518,400 Calculate the income tax levied by the United States government on an unmarried taxpayer in 2020 on a taxable income of $23,610