How do you think ratios are used in paint mixtures

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

How can (square root of 25) ^2 be rewritten?

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 : )