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Several oil companies are jointly planning to build an oil pipeline to connect several southwestern and midwestern cities. The miles between cities are shown in the following table:

	1	2	3	4	5	6	7	8	9	10
1. Albuquerque		400		520				750
2. Denver	400		450	490
3. Omaha		450		580	210	120
4. Oklahoma City	520	490	580		310			240
5. Kansas City			210	310		175	260	340
6. Des Moines			120		175		250		250
7. St. Louis					260	250		270	235	320
8. Little Rock	750			240	340		270			340
9. Indianapolis						250	235			260
10. Nashville							320	340	260

Determine a pipeline system that will connect all 10 cities using the minimum number of miles of pipe, and indicate how many miles of pipe will be used.

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