To find the area of the 10 squares, we need to find the area of one square and then multiply it by 10.
The area of one square is S^2, where S is the side length. In this case, S = 7, so the area of one square is 7^2 = 49 square inches.
Multiplying this by 10 gives us 10 * 49 = 490 square inches.
To find how much space Robert will have left for his presentation, we subtract the area of the squares from the total area of the posterboard.
720 - 490 = 230 square inches.
Therefore, the answer is A. 230 square inches.
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 posterboard is seven 20 in.² to find how much space Robert will have left for his presentation. He uses squares with 7 inch sides evaluate 720-10S2, when S equals seven.
A. 230 square inches
B. 34,790 square inches
C. 9,940 square inches
D. 580 square inches
1 answer