A square has side length of 7.3 in. If the area is multiplied by \( \frac{1}{9} \), what happens to the perimeter? The perimeter is tripled. The perimeter is multiplied by 9. The perimeter is multiplied by \( 1 / 3 \). The perimeter is multiplied by \( 1 / 9 \).

When you multiply the area of a square by \( \frac{1}{9} \), you are essentially reducing the area. The area of the square is given by side length squared, so in this case, it’s \( 7.3^2 \) which equals about 53.29 in². Reducing the area by \( \frac{1}{9} \) gives an area of approximately 5.91 in². To find the new side length, you take the square root of the new area, leading to a reduced side length of around 2.43 in. Now, the perimeter is calculated as four times the side length. So originally, the perimeter was \( 4 \times 7.3 = 29.2 \) in. Now, with the side length reduced to 2.43 in, the new perimeter is \( 4 \times 2.43 \approx 9.72 \) in, which means the perimeter is multiplied by \( \frac{1}{3} \). So, the correct answer is that the perimeter is multiplied by \( \frac{1}{3} \)!