New York state covers a land and water area of 31,728,640 acres.
The Airport covers an area of around 1,440 acres.
Pendelton is 125,000 acres with 17 miles of Pacific shoreline. That is large, but it is dwarfed by Twentyninepalms.
If the parcel of land is rectangular, and its area is 15 acres, and one dimension is 2,500 ft,then the other dimension is(15 x 43,560)/(2,500) = 261ft4.32in
Massachusetts has a total area of roughly 7 million acres.
15 acres = 653,400ft²
An acre isn't a unit of length, it is a unit of area. You can have a surface - for example a rectangle - as long or as short as you like, provided the product of the two sides is enough to get a surface of 15 acres, in this case.
If the area is a circle with a four-mile circumference, the area in acres is: 814.72 acres.
272,896,000 acres of land area.
acres
15 acres = 60,702.85 square meters
15 acres is 653,400 square feet