To find out how much space Robert will have left for his presentation after using the squares, we'll start by calculating the area of one square and then the total area of the 10 squares.
-
Calculate the area of one square with side length \( s = 7 \) inches: \[ \text{Area of one square} = s^2 = 7^2 = 49 \text{ square inches} \]
-
Calculate the total area of 10 squares: \[ \text{Total area of 10 squares} = 10 \times 49 = 490 \text{ square inches} \]
-
Now, subtract the area of the 10 squares from the total area of the poster board: \[ \text{Remaining area} = 720 - 490 = 230 \text{ square inches} \]
Therefore, the space Robert will have left for his presentation is:
230 square inches.
3 answers