What is the principal remaining after 20 monthly payments have been made on a $20,000 five-year loan? The annual interest rate is 12% compounded monthly. A. $17,094 B. $16,073 C. $14,579 D. $13,333 E. $10,224 Formula used: _________ Given I = $-100,000; A = $-24,000; N = infinity; and interest rate of 8% per year; the correct equation to calculate the capitalized cost of a project with those estimates is: A. [-100,000 - 24,000(P/A, 8%, infinity)] times (0.08) B. -100,000 + (-24,000/0.08) C. [-100,000(A/P, 8%, 6) - (24,000)/0.08] D. -100.000 - [24,000(P/A, 8%, 6)1 (0.08) The maintenance cost of a certain machine is $ 1000 per year for the first 5 years and $2000 per year for the next 5 years. At an interest rate of 10% per year, the present worth of the maintenance cost is closest to A. $7,740 B. $7,990 C. $8,480 D. $8,790 Formula used: _________ A 1 -year interest rate of 12% per year, compounded continuously, is closest to the following interest rate: A. 1 % monthly effective rate B. 3.25% effective quarterly rate C. Simple 12.75 % per year D. All of the preceding Formula used: ___________ The perpetual annual worth of investing $80,000 now and $20,000 per year starting in year 11 and continuing forever at 10% per year is closest to: A. $28,000 B. $18,600 C. $15,700 D. $12,800