Robert is preparing a poster-board presentation. He wants to make a decorative pattern with 10 squares to fill part of the poster. The area of the poster board is 720 square inches. To find how much space Robert will have left for his presentation if he uses squares with 7-inch sides, evaluate 720 − 10s2 when s = 7 .(1 point)
Responses
230 square inches
230 square inches
34,790 square inches
34,790 square inches
580 square inches
580 square inches
9,940 square inches
To find how much space Robert will have left for his presentation, we need to find the total area of the squares he will use and subtract it from the total area of the poster board.
The area of one square with side length 7 inches is 7 * 7 = 49 square inches.
Since Robert wants to use 10 squares, the total area of the squares he will use is 10 * 49 = 490 square inches.
To find the space left for the presentation, we subtract the area of the squares from the total area of the poster board:
720 - 490 = 230 square inches.
Therefore, Robert will have 230 square inches left for his presentation.