The stem and leaf plot shows the number of days of snowfall at a winter sports resort for each of the past 17 years

Use sigma notation to represent the following series for 9 terms.

Jan accidently ran 7 minutes longer than he was supposed to. write an expression for the total amount of time jan ran if she was supposed to run m minutes

Arace is 10 kilometers long.markers will be placed at the beginning and end of the race course and at each 500 meter mark.how many markers are needed to mark the course for the race?