Question: A food delivery app's usage data revealed that the average number of days between a user's first and second order is 2 8 with a

A food delivery app's usage data revealed that the average number of days between a user's first and second order is28 with a standard deviation of7
days. Assume the data to be approximately bell-shaped.
Estimate the percentage of food delivery app's usage for which the number of days between orders is between21 and35.

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