0.10% as a decimal anyone got the answer

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 : )

Sum of the interior angles of a pentagon

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.