An HVAC technician is calculating the cross-sectional area of a rectangular vent. If the length of the vent is $(x + 3)$ inches and the width is $(x - 3)$ inches, which expression represents the simplified area in square inches?

A technician is calculating the area of a rectangular panel with dimensions $(x + 3)$ and $(x - 3)$. Arrange the following steps in the correct order to simplify this product and reach the final expression $x^2 - 9$.

A graphic designer is resizing a square layout by increasing the width by 3 inches and decreasing the height by 3 inches, creating a new area of $(x + 3)(x - 3)$. When this product is simplified to the form $x^2 - k$, the value of $k$ is ____.

A logistics specialist is calculating the area of a rectangular shipping container footprint with a length of $(x + 3)$ feet and a width of $(x - 3)$ feet. The simplified algebraic expression for the area of this container is $x^2 - 9$ square feet.

Storage Unit Floor Space Calculation