need help with #2, 3, 5, 7, and 8

4.7 Problems 1. Use a present worth analysis to determine which one of the following two earth stations should be chosen. Both can provide the same service. Dumb Dish $50,000 System First cost Service life Salvage value Annual operating cost Other costs 4 years $7,500 $10,000 None Smart Sat $85,000 6 years $18,000 $6,500 $10,000 at end of 4th year Use a minimum attractive rate of return of 20%. List three irreducibles, or judgment factors, that might influence your decision. 2. Solve question #4 in Chapter 3 using a present worth analysis. 3. Solve question #5 in Chapter 3 using a present worth analysis. 4. Solve question #6 in Chapter 3 using a present worth analysis. 5. Use present worth analysis to determine whether the following proposal seems to be justified, if an annual rate of return of 16%, compounded semi-annually, is desired: Investments would be $50,000 on January 1, 1995 and $70,000 on July 1, 1995. Income would be quite irregular, starting at $10,000 each six months beginning January 1, 1996 until, and including, January 1, 1998. There would be no income after that until July 1, 1999, when $35,000 would be received. Then, there would be income of $25,000 on January 1, 2000; $50,000 on July 1, 2000; and $25,000 on January 1, 2001. 6. Use a spreadsheet to check your answer to #5 above. 7. Roadway engineers must decide whether to specify granite or cast-in-place concrete curbs. Suppose granite curbs cost $27 per linear foot, installed, and last 100 years, while cast-in-place concrete curbs cost $13.50 per linear foot, installed, and last 50 years. With interest at 7%, which do you recommend? 8. For what lifetime of cast-in-place concrete curbs in question #7 above (instead of 50 years) will the two alternatives be equally attractive, if all other conditions remain the same? 9. An auto finance company's "college graduate finance plan" announces "College grads-- get $400 off a new car or light-duty truck!" The deal is that you finance with them, get $400 off the price of your new vehicle, and make no payments for three months. Suppose you buy a new car for $16,000 and you finance the entire amount. Your options are 1) use this finance company's "great deal," with an interest rate of 15% per year, a $400 discount, and no 4.7 Problems 1. Use a present worth analysis to determine which one of the following two earth stations should be chosen. Both can provide the same service. Dumb Dish $50,000 System First cost Service life Salvage value Annual operating cost Other costs 4 years $7,500 $10,000 None Smart Sat $85,000 6 years $18,000 $6,500 $10,000 at end of 4th year Use a minimum attractive rate of return of 20%. List three irreducibles, or judgment factors, that might influence your decision. 2. Solve question #4 in Chapter 3 using a present worth analysis. 3. Solve question #5 in Chapter 3 using a present worth analysis. 4. Solve question #6 in Chapter 3 using a present worth analysis. 5. Use present worth analysis to determine whether the following proposal seems to be justified, if an annual rate of return of 16%, compounded semi-annually, is desired: Investments would be $50,000 on January 1, 1995 and $70,000 on July 1, 1995. Income would be quite irregular, starting at $10,000 each six months beginning January 1, 1996 until, and including, January 1, 1998. There would be no income after that until July 1, 1999, when $35,000 would be received. Then, there would be income of $25,000 on January 1, 2000; $50,000 on July 1, 2000; and $25,000 on January 1, 2001. 6. Use a spreadsheet to check your answer to #5 above. 7. Roadway engineers must decide whether to specify granite or cast-in-place concrete curbs. Suppose granite curbs cost $27 per linear foot, installed, and last 100 years, while cast-in-place concrete curbs cost $13.50 per linear foot, installed, and last 50 years. With interest at 7%, which do you recommend? 8. For what lifetime of cast-in-place concrete curbs in question #7 above (instead of 50 years) will the two alternatives be equally attractive, if all other conditions remain the same? 9. An auto finance company's "college graduate finance plan" announces "College grads-- get $400 off a new car or light-duty truck!" The deal is that you finance with them, get $400 off the price of your new vehicle, and make no payments for three months. Suppose you buy a new car for $16,000 and you finance the entire amount. Your options are 1) use this finance company's "great deal," with an interest rate of 15% per year, a $400 discount, and no