Akiko Hamaguchi, manager of a small sushi restaurant, Little Ginza, in Phoenix, Arizona, has to estimate the daily amount of salmon needed.

• Akiko has estimated the daily consumption of salmon to be normally distributed with a mean of 12 pounds and a standard deviation of 3.2 pounds.
• Buying 20 lbs of salmon every day has resulted in too much wastage.
• Therefore, Akiko will buy salmon that meets the daily demand of customers on 90% of the days.

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