The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell-shaped distribution. This distribution has a mean of 48 and a standard deviation of 7. Using the empirical (68-95-99.7) rule, what is the approximate percentage of 1-mile long roadways with potholes numbering between 41 and 69? Caution: Using tables or Excel for this may produce a wrong answer. Use the 68-95-99.7 rule. Answer =  % . (Do not enter the percent symbol or round your answer. This asks for a percentage so do not convert to decimal. For example, for 99%, you would enter 99, not 0.99)

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