Find the surface area and volume of the composite figure

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

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?

Solve 17= -13 - 8x and show your work.