Chapter 7

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1.	12 = 21, 125 = 46, 13 = 17, 134 = 29, 1346 = 39, 1347 = 38
3.	12 = 85, 13 = 53, 14 = 88, 135 = 114, 137 = 170, 1376 = 194
5.	12 = 25, 123 = 60, 124 = 43, 15 = 48, 16 = 50, 17 = 32, 178 = 72, 179 = 61, 1510 = 72
7.	12 = 7, 13 = 10, 14 = 8, 135 = 13, 1358 = 21, 146 = 13, 1469 = 20, 147 = 16, 146910 = 29
9.	1761012 = 18
11.	1478 = 42 miles
13.	131114 = 13 days
15.	Kotzebue: 1281115 = 10 hr.; Nome: 1281213 = 9 hr.; Stebbins: 12710 = 8.5 hr.
17.	147; $64,500
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19.	13 = 4.1, 14 = 4.8, 23 = 3.6, 48 = 5.5, 56 = 2.1, 67 = 2.8, 78 = 2.7, 79 = 2.7, 910 = 4.6; 32,900 ft.
21.	134658, 32, 67; 320 yd.
23.	14263, 675, 78; 1,160 yd.
25.	125689, 243, 47; 22 miles
27.	12, 1463, 6985, 911, 9107, 1013, 101214; 1,086 ft.
29.	12 = 6, 14 = 5, 13 = 5, 25 = 6, 24 = 0, 34 = 0, 36 = 5, 45 = 0, 46 = 5, 56 = 6, maximum flow = 16
31.	12 = 15, 14 = 20, 13 = 12, 25 = 11, 24 = 4, 34 = 3, 36 = 9, 46 = 27, 56 = 11, maximum flow = 47
33.	12 = 7, 14 = 7, 13 = 4, 26 = 6, 24 = 1, 34 = 3, 35 = 1, 46 = 0, 48 = 4, 47 = 7, 57 = 1, 68 = 6, 78 = 8, maximum = 18 flights
35.	12 = 4, 13 = 4, 14 = 4, 23 = 0, 25 = 4, 34 = 0, 35 = 2, 36 = 2, 46 = 4, 56 = 0, 57 = 6, 68 = 6, 78 = 0, 79 = 6, 89 = 6; 12,000 cars
37.	12 = 6, 13 = 2, 14 = 8, 25 = 0, 26 = 6, 35 = 0, 36 = 2, 45 = 8, 57 = 3, 58 = 4, 59 = 1, 68 = 2, 69 = 6, 710 = 3, 810 = 6, 910 = 7; 16
39.	12 = 70, 13 = 50, 14 = 60, 15 = 70, 26 = 25, 29 = 45, 36 = 30, 37 = 20, 47 = 35, 48 = 25, 58 = 40, 511 = 30, 610 = 65, 612 = 5, 710 = 40, 76 = 15, 813 = 60, 814 = 5, 912 = 45, 1012 = 55, 1013 = 50, 1114 = 30, 1213 = 60, 1215 = 45, 1315 = 170, 1415 = 35; 250
41.	GdanskGalveston = 125, HamburgJacksonville = 110, HamburgNew Orleans = 95, HamburgGalveston = 5, LisbonNorfolk = 85, NorfolkKC = 75, NorfolkDallas = 10, JacksonvilleFR = 70, JacksonvilleKC = 40, NOFR = 95, GalvestonDallas = 130, FRDenver = 105, FRPittsburg = 60, KCCleveland = 65, KCNashville = 50, DallasTucson = 85, DallasCleveland = 55