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What does the relationship between the mean and median reveal about the shape of the data

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)

The longer leg of a 30-60-90 trangle is 18