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Zarqa University
Engineering Economics
HW # 1
Due: After 1 week
1.1 What is the definition of Time Value of Money?
1.6 What is the difference between simple and compound interest?
1.10 If Ford Motor Company's profits increased from 22 cents per share to
29 cents per share in the April-June quarter compared to the previous
quarter, what was the rate of increase in profits for that quarter?
1.12 A design-build engineering firm completed a pipeline project wherein
the company realized a profit of $2.3 million in 1 year. If the amount of
money the company had invested was $6 million, what was the rate of return
on the investment?
1
1.14 A publicly traded construction company reported that it just paid off a
loan that it received 1 year earlier. If the total amount of money the company
paid was $1.6 million and the interest rate on the loan was 10% per year,
how much money did the company borrow 1 year ago?
1.16 At an interest rate of 8% per year, $10,000 today is equivalent to how
much (a) 1 year from now and (b) 1 year ago?
1.19 At what interest rate would $100,000 now be equivalent to $80,000 one
year ago?
1.20 Certain certificates of deposit accumulate interest at 10% per year
simple interest. If a company invests $240,000 now in these certificates for
the purchase of a new machine 3 years from now, how much will the
company have at the end of the 3-year period?
2
1.21 A local bank is offering to pay compound interest of 7% per year on
new savings accounts. An e-bank is offering 7.5% per year simple interest
on a 5-year certificate of deposit. Which offer is more attractive to a
company that wants to set aside $1,000,000 now for a plant expansion 5
years from now?
1.22 Badger Pump Company invested $500,000 five years ago in a new
product line that is now worth $1,000,000. What rate of return did the
company earn (a) on a simple interest basis and (b) on a compound interest
basis?
1.23 How long will it take for an investment to double at 5% per year (a)
simple interest and (b) compound interest?
3
1.30 Write the engineering economy symbol that corresponds to each of the
following
Excel functions.
(a) PV
(b) PMT
(c) NPER
(d) IRR
(e) FV
1.39 Construct a cash flow diagram for the following cash flows: $10,000
outflow at time zero, $3000 per year outflow in years I through 3 and $9000
inflow in years 4 through 8 at an interest rate of 10% per year, and an
unknown future amount in year 8.
4
1.41 Use the rule of 72 to estimate the time it would take for an initial
investment of $10,000 to accumulate to $20,000 at a compound rate of 8%
per year.
Note: Read page 35 in the text book for information about rule of 72
1.42 Estimate the time it would take (according to the rule of 72) for money
to quadruple in value at a compound interest rate of 9% per year.
Note: Read page 35 in the text book for information about rule of 72
5
1.41 Use the rule of 72 to estimate the time it would take for an initial
investment of $10,000 to accumulate to $20,000 at a compound rate of 8%
per year.
Note: Read page 35 in the text book for information about rule of 72
1.42 Estimate the time it would take (according to the rule of 72) for money
to quadruple in value at a compound interest rate of 9% per year.
Note: Read page 35 in the text book for information about rule of 72
5

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Hw1

  • 1. Zarqa University Engineering Economics HW # 1 Due: After 1 week 1.1 What is the definition of Time Value of Money? 1.6 What is the difference between simple and compound interest? 1.10 If Ford Motor Company's profits increased from 22 cents per share to 29 cents per share in the April-June quarter compared to the previous quarter, what was the rate of increase in profits for that quarter? 1.12 A design-build engineering firm completed a pipeline project wherein the company realized a profit of $2.3 million in 1 year. If the amount of money the company had invested was $6 million, what was the rate of return on the investment? 1
  • 2. 1.14 A publicly traded construction company reported that it just paid off a loan that it received 1 year earlier. If the total amount of money the company paid was $1.6 million and the interest rate on the loan was 10% per year, how much money did the company borrow 1 year ago? 1.16 At an interest rate of 8% per year, $10,000 today is equivalent to how much (a) 1 year from now and (b) 1 year ago? 1.19 At what interest rate would $100,000 now be equivalent to $80,000 one year ago? 1.20 Certain certificates of deposit accumulate interest at 10% per year simple interest. If a company invests $240,000 now in these certificates for the purchase of a new machine 3 years from now, how much will the company have at the end of the 3-year period? 2
  • 3. 1.21 A local bank is offering to pay compound interest of 7% per year on new savings accounts. An e-bank is offering 7.5% per year simple interest on a 5-year certificate of deposit. Which offer is more attractive to a company that wants to set aside $1,000,000 now for a plant expansion 5 years from now? 1.22 Badger Pump Company invested $500,000 five years ago in a new product line that is now worth $1,000,000. What rate of return did the company earn (a) on a simple interest basis and (b) on a compound interest basis? 1.23 How long will it take for an investment to double at 5% per year (a) simple interest and (b) compound interest? 3
  • 4. 1.30 Write the engineering economy symbol that corresponds to each of the following Excel functions. (a) PV (b) PMT (c) NPER (d) IRR (e) FV 1.39 Construct a cash flow diagram for the following cash flows: $10,000 outflow at time zero, $3000 per year outflow in years I through 3 and $9000 inflow in years 4 through 8 at an interest rate of 10% per year, and an unknown future amount in year 8. 4
  • 5. 1.41 Use the rule of 72 to estimate the time it would take for an initial investment of $10,000 to accumulate to $20,000 at a compound rate of 8% per year. Note: Read page 35 in the text book for information about rule of 72 1.42 Estimate the time it would take (according to the rule of 72) for money to quadruple in value at a compound interest rate of 9% per year. Note: Read page 35 in the text book for information about rule of 72 5
  • 6. 1.41 Use the rule of 72 to estimate the time it would take for an initial investment of $10,000 to accumulate to $20,000 at a compound rate of 8% per year. Note: Read page 35 in the text book for information about rule of 72 1.42 Estimate the time it would take (according to the rule of 72) for money to quadruple in value at a compound interest rate of 9% per year. Note: Read page 35 in the text book for information about rule of 72 5