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
580 square inches
580 square inches
9,940 square inches
9,940 square inches
34,790 square inches
34,790 square inches
230 square inches
To find the area of one square, we can use the formula for the area of a square, which is given by side length squared. In this case, the side length is 7 inches, so the area of one square is 7^2 = 49 square inches.
Since Robert wants to use 10 squares, the total area of the squares is 10 * 49 = 490 square inches.
To find the space Robert will have left for his presentation, we subtract the area of the squares from the total area of the poster board: 720 - 490 = 230 square inches.
Therefore, the correct answer is 230 square inches.