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 34,790 square inches r34,790 square inches 230 square inches 230 square inches580 square inches580 square inches9,940 square inches
The area of each square is s^2 = 7^2 = 49 square inches.
To find the total area covered by the squares, multiply the area of each square by the number of squares: 49 * 10 = 490 square inches.
To find the space left for Robert's presentation, subtract the total area covered by squares from the area of the poster: 720 - 490 = 230 square inches.
Therefore, the correct response is 230 square inches.
To find how much space Robert will have left for his presentation, we need to subtract the area of the squares from the total area of the poster board.
The formula to find the area of a square is A = s^2, where s is the length of the sides.
In this case, s = 7 inches.
Therefore, the area of each square will be 7^2 = 49 square inches.
Since Robert wants to use 10 squares, the total area of the squares will be 10 * 49 = 490 square inches.
To find the space 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, Robert will have 230 square inches left for his presentation.