The dot plot shows how much hairdressers in Margot's area charge for a woman's haircut. The least expensive cut is $25. Margot described the data as having a spread from $25 to $47, seven gaps, a cluster from $35 to $36, and a center of $37. Where did Margot make an error?

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What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?