Please help me find the circumference ​

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

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

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total