Formula of a square minus b square​

An advertisement is on a flyer that has a thickness of 8.2 × 10-5 meters. each measurement below is the thickness of a stack of flyers. drag each measurement to the correct stack.

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

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.