Walton – Math 8 – Spring 08

Answers to some Even Homework Problems

Assignment # 5

3.1 All answers are graphs

3.2 # 2 Max is 53 at (9,1), Min is 1 at (1,5)

3.3 # 8 50 to A, 50 to B, Min Cost $1100

R4 # 2 -2/7

R4 # 6 -6/11

R4 # 22 Approx -.45 and -5.55

R4 # 30 -11/5

R5 # 12 0 < x < 8

R5 # 22 [ 7/3, 4 ]

Assignment # 6

3.1 # 42 x > 1000, y > 800, x + y < 2400

3.2 # 14 a) x = 0, y = 7/2, Min = 7 b) x = 0, y = 5, Min = 10 c) x = 14/3, y = 8/3, Min = 58/3

3.3 # 14 Many solutions, Max profit 192,500,000

4.1 # 10 x1 = 8, x2 = 0, x3 = 5, s1 = 0, s2 = 0, z = 10

4.2 # 2 x1 = 5, x2 = 0, x3 = 0, s1 = 0, s2 = 10, z = 15

4.2 # 8 x1 = 3, x2 = 4, s1 = 0, s2 = 0, z = 18

2.5 # 60 a) 100, 110, 90 b) 95, 100, 90 c) 140, 130, 100

Assignment # 7

Chap 3 Review # 34 Math 7, Accounting 2, Points 31

Assignment # 8

5.1 # 20 $8265.24

5.1 # 28 3.034%

5.1 # 40 $51,089.32

Chap 1 Review # 34 S(q) = .5q + 10

Chap 1 Review # 36 Price $41.25 Quantity 62.5

Chap 1 Review # 50 y = .73x – 13.1

Assignment # 9

5.2 # 2 405

5.2 # 10 120

5.2 # 22 $5,637.09

5.2 # 26 $126,717.49

5.2 # 32 $21,903.68

5.2 # 36 $217,328.08

5.2 # 42 $952.62

5.2 # 48 a) $149,850.69 b) $137,895.79 c) $11,954.90

Chap 2 Review # 48 (2, 3, -1)

R6 # 2 1/81

R6 # 10 8^5

R6 # 16 1 / (3z^7)

R6 # 30 3

R6 # 38 1000/1331

R6 # 44 12^3 / y^8

R7 # 2 6

R7 # 10 -2 Sqrt(7)

R7 # 20 5 Sqrt(7) / 7

R7 # 28 [Sqrt(r) + Sqrt(3)] / (r – 3)

5.2 # 52 $ 66,988.91

5.2 # 58 $1,349.48

5.3 # 8 $7,877.72

5.3 # 12 $160,188.18

5.3 # 18 $5,309.69

5.3 # 22 $260.19

5.3 # 48 a) $4,025.90 b) $2,981.93

Assignment # 10

Ch 5 Review # 2 $426.88

Ch 5 Review # 16 $12,857.07

Ch 5 Review # 28 $10,078.44

Ch 5 Review # 36 $2,619.29

Ch 5 Review # 40 $31,921.91

Ch 5 Review # 44 $12,806.38

Ch 5 Review # 58 $5,596.62

Ch 5 Review # 64 $4,587.64

7.1 # 2 True

7.1 # 8 False

7.1 # 20 64

7.1 # 26 {8, 11}

7.1 # 38 {7, 9}

7.2 # 20 9

7.2 # 36 Total on diagram is 142

Assignment # 11

7.3 # 6 {0,1,2…,24}

7.3 # 20 ½

7.3 # 30 3/13

7.4 # 2 No

7.4 # 8 1/36, 1/12, 1/9, 5/36

7.4 # 16 3/13, 4/13, 7/13, ¾, 8/13

7.4 # 18 ½, 7/10, ½

7.4 # 24 1 to 5

7.4 # 26 2 to 1

7.5 # 2 1/3

7.5 # 12 .012

7.5 # 16 ¼, ½

7.5 # 34 .94

7.6 # 2 2/3

7.6 # 24 .986

Assignment # 12

Ch 7 Review # 2 True

Ch 7 Review # 6 False

Ch 7 Review # 10 False

Ch 7 Review # 22 sales employees who have MBA

Ch 7 Review # 42 8/13

8.1 # 2 5040

8.1 # 6 1320

8.1 # 12 n!

8.1 # 14 120

8.1 # 16 2730

Assignment # 13

8.1 # 32 720

8.1 # 46 1,000,000,000

8.2 # 2 56

8.2 # 4 1.761 x 10^12

8.2 # 8 n

8.2 # 10 1716

8.2 # 18 3102, 7722

8.2 # 30 21, 6, 11

8.3 # 6 .0045

8.3 # 10 .0498

8.3 # 36 119/120

8.3 # 50 .054, .011, .046, .183, .387, .885

8.4 # 2.313

8.4 # 8 .969

8.4 # 16 .313

8.4 # 18 .656

Assignment # 14

8.4 # 44 .072

8.4 # 62 .00079

8.4 # 64 .999922

8.5 # 10 5.9

8.5 # 50 .00488

9.1 # 8 44

9.1 # 12 52.6

9.1 # 18 1056

9.1 # 26 162 and 165

9.2 # 2 0

9.2 # 4 20.9

9.2 # 30 20.7

9.3 # 6 .291

9.3 # 10 .2437

9.3 # 14 .6648

9.3 # 16 -2.33

9.3 # 22 500

9.3 # 24 650 to 780

9.3 # 40 .4325

9.3 # 48 .0823