Which of the following formulas is used to determine the number of acres in a parcel of land?

This expression calculates the area of a rectangle in square feet when length and width are given in feet. While this is a necessary step for finding the area, it does not directly convert that area into acres. To determine acreage, one must use the area result and apply the appropriate conversion factor.

This formula converts square feet into square miles rather than acres, since there are 640 acres in one square mile. While it is another valid conversion, it does not provide the correct acreage when starting with a measurement in square feet, making it an incorrect option.

This choice is incorrect as it does not relate to acres at all. The multiplication factor of 1,296 does not represent any relevant conversion between square miles and acres. In fact, one square mile equals 640 acres, so this formula does not make sense for determining acreage.