Answer:
21 strips
Step-by-step explanation:
Stanley has a total area on his bathroom = 450 square feet.
Each strip of wallpaper covers between = 20 to 24 feet²
Average area covers each strip = (20 + 24)/2 = 22 feet²
In order to estimate the number of strips of wallpaper Stanley will need, we have to divide total area by the area of each strip
= \(\frac{450}{22}\) = 20.45 strips ≈ 21 strips
Stanley will need 21 strips.
