The figure below is a net for a right rectangular prism. Its surface area is 396 cm² and the area of some of the faces are filled in below. Find the area of the missing faces, and the missing dimension.

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in