Zoë is painting a mural on one wall measuring 16' in length and 8' in height. There is one door measuring 30" by 7' on the wall. What is the surface area to be painted?
First, let's find the total surface area of the wall:
Total length of the wall = 16 ft
Total height of the wall = 8 ft
Total surface area = Length x Height
Total surface area = 16 ft x 8 ft
Total surface area = 128 square feet
Next, we need to subtract the surface area of the door:
Surface area of the door = Width x Height
Surface area of the door = 2.5 ft x 7 ft
Surface area of the door = 17.5 square feet
Total surface area to be painted = Total surface area - Surface area of the door
Total surface area to be painted = 128 square feet - 17.5 square feet
Total surface area to be painted = 110.5 square feet
Therefore, Zoë needs to paint 110.5 square feet of the wall.