What is the equation of variation? In Tanza National Trade School, the number of girls g varies directly as the number of boys b and inversely as the number of teachers t. When there were 50 girls, there were 20 teachers and 10 boys

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 : )