Cara and Beejal make a poster for school. The poster is in the shape of a rectangle. The left side of the poster measures 5 units; the top side of the poster measures 8 units. What is the area in square units of the completed poster?
The area of a rectangle is calculated by multiplying the length by the width. In this case, the length is 5 units and the width is 8 units.
Area = length x width
Area = 5 units x 8 units
Area = 40 square units
Therefore, the area of the completed poster is 40 square units.