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How do you solve this using Excel Suppose that 10th grade girls have hair lengths that are normally distributed with a mean of 10 inches

How do you solve this using Excel

Suppose that 10th grade girls have hair lengths that are normally distributed with a mean of 10 inches and a standard deviation of 4 inches. How long would a 10th grade girl's hair have to be so that it is longer than 80% of all girls?

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