How should square feet be calculated for a wipe sample measuring 2'x2"?

To determine the square footage of a wipe sample that measures 2 feet by 2 feet, you need to calculate the area by multiplying the length and width of the sample. In this case, 2 feet multiplied by 2 feet results in an area of 4 square feet.

The answer provided, which is 0.33 square feet, indicates a misunderstanding of the area calculation. To arrive at the correct total square footage, you should see that 2 feet by 2 feet indeed equals 4 square feet of surface area, reflecting the total area actually covered by the wipe sample.

Understanding how to accurately calculate area is crucial in lead assessment practices, as it directly impacts risk assessments related to lead exposure. Correctly interpreting surface dimensions is essential for effectively determining the lead hazard control measures necessary for a given space. The choices alongside this question reflect different interpretations of area measurements, but the correct calculation clearly shows that 4 square feet is the appropriate area represented by the 2'x2' wipe sample.