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Mathematics 8 Online
OpenStudy (anonymous):

Mario has a pizzeria. The times to prepare and deliver pizzas are normally distributed with mean 20 minutes and standard deviation 5 minutes. Use the empirical rule to find an interval in which about 95% of the times will lie. A) (15 minutes, 25 minutes) B) (10 minutes, 30 minutes) C) (5 minutes, 35 minutes) D) (0 minutes, 40 minutes)

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