The organizers of the Red Maple College Fun Run gathered data about the runners’ ages. This box plot shows the results. What percent of the runners were between 20 and 45 years old?

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )