math
posted by Stacy .
The median weekly earnings for people working in sales is $450. Assume that the weekly earnings are approx. normally distributed with a standard deviation of $90.
What is the mean weekly earnings for people working in sales?
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A salesperson earns $200 a week plus a 4% commission on her sales. Which equation models the relationship between her sales in a given week, s, and her weekly earnings, e?