Help please?

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

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

The volume, v, of a rectangular prism is determined using the formula, where / is the length, w is the width, and his theheight of the prism. carltren solves for w and writes the equivalent equation w=using this formula, what is the width of a rectangular prism that has a volume of 138.24 cubic inches, a height of 9.6 inches,and a length of 3.2 inches?