Walker took a sample of 55 of his classmates and timed them as they completed a maze he created. Here are their times (in minutes): 1, 6, 6, 7, 10 mean= 6 minutes What is the standard deviation? Round your answer to two decimal places.

Derek purchased a new gym membership. it costs him seven dollars a month plus two dollars for every time that he visits the gym. he wants to spend less than 25 dollars a month to visit the gym. write an inequality that models the situation using the variable v for the number of visits per month. also find the maximum number of visits he can make to the gym and still keep his cost below 25 dollars a month.