Best estimate for the product of 289 and 7?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.

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 : )