Solucionario de ing economica tarquin

SOLUTIONS TO SELECTED PROBLEMS

Student: You should work the problem completely before referring to the solution.

CHAPTER 1

Solutions included for problems 1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40,
43, 46, and 49

1.1 Time value of money means that there is a certain worth in having money and the
worth changes as a function of time.

1.4 Nearest,tastiest, quickest, classiest, most scenic, etc

1.7 Minimum attractive rate of return is the lowest rate of return (interest rate) that
companies or individuals consider to be high enough to induce them to invest their
money.

1.10 Rate of increase = [(29 – 22)/22]*100 = 31.8%

1.13 Profit = 8 million*0.28 = $2,240,000

1.16 (a) Equivalent future amount = 10,000 +10,000(0.08)
= 10,000(1 + 0.08)
= $10,800

(b) Equivalent past amount: P + 0.08P = 10,000
1.08P = 10,000
P = $9259.26

1.19 80,000 +80,000(i) = 100,000
i = 25%

1.22 Simple: 1,000,000 = 500,000 + 500,000(i)(5)
i = 20% per year simple

Compound: 1,000,000 = 500,000(1 + i)5
(1 + i)5 = 2.0000
(1 + i) = (2.0000)0.2
i = 14.87%


1.25Plan 1: Interest paid each year = 400,000(0.10)
= $40,000

Total paid = 40,000(3) + 400,000
= $520,000

Plan 2: Total due after 3 years = 400,000(1 + 0.10)3
= $532,400

Difference paid =532,400 – 520,000
= $12,400

1.28 (a) FV(i%,n,A,P) finds the future value, F
(b) IRR(first_cell:last_cell) finds the compound interest rate, i
(c) PMT(i%,n,P,F) finds the equal periodic payment, A
(d) PV(i%,n,A,F) finds the present value, P.

1.31 For built-in Excel functions, a parameter that does not apply can beleft blank when
it is not an interior one. For example, if there is no F involved when using the PMT
function to solve a particular problem, it can be left blank because it is an end
function. When the function involved is an interior one (like P in the PMT
function), a comma must be put in its position.

1.34 Highest to lowest rate ofreturn is as follows: Credit card, bank loan to new
business, corporate bond, government bond, interest on checking account

1.37 End of period convention means that the cash flows are assumed to have occurred
at the end of the period in which they took place.

1.40 The cash flow diagram is:



1.43 4 = 72/ii = 18% per year

1.46 2P = P + P(0.05)(n)
n = 20
Answer is (d)

1.49 Answer is (c)

SOLUTIONS TO SELECTED PROBLEMS

Student: You should work the problem completely before referring to the solution.

CHAPTER 2

Solutions included for problems 1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58, 61, 64, 67, 70, 73, 76, 79,and 82

2.1 1. (F/P,8%25) = 6.8485; 2. (P/A,3%,8) = 7.0197; 3. (P/G,9%,20) = 61.7770;
4. (F/A,15%,18) = 75.8364; 5. (A/P,30%,15) = 0.30598

2.4 P = 600,000(P/F,12%,4)
= 600,000(0.6355)
= $381,300

2.7 P = 75(P/F,18%,2)
= 75(0.7182)
= $53.865 million

2.10 P = 162,000(P/F,12%,6)
= 162,000(0.5066)...