If the marked price of an article is Rs 400 and sold it at a discount of 10%, find the net selling price of the article.

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

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 : )

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute