Mathematics, 23.06.2020 23:01 starlabayliss

The Environmental Protection Agency must visit nine factories for complaints of air pollution. In how many ways can a representative visit five of these to investigate this week? Since the representative's travel to visit the factories includes air travel, rental cars, etc., then the order of the visits will make a difference to the travel costs.

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The Environmental Protection Agency must visit nine factories for complaints of air pollution. In ho...