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The number of potholes in any given 1-mile stretch of freeway pavement in Pennsylvania has a...

The number of potholes in any given 1-mile stretch of freeway pavement in Pennsylvania has a Normal distribution. This distribution has a mean of 62 and a standard deviation of 5. Using the Empirical Rule, what is the approximate percentage of 1-mile long roadways with potholes numbering between 57 and 72?

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