What is the area of a circular site with a diameter of 140 feet?

To find the area of a circular site, you can use the formula for the area of a circle, which is A = πr², where "r" is the radius and "π" (pi) is approximately 3.14.

In this case, the diameter of the circle is given as 140 feet. The radius is half of the diameter, so you divide 140 by 2, resulting in a radius of 70 feet.

Now plugging the radius into the area formula:

A = π(70)²

This can be calculated as:

A = π(4900)

Using 3.14 for π:

A ≈ 3.14 × 4900 ≈ 15,226 sq ft.

More precisely, using a more accurate value for π, such as 3.14159, would yield:

A ≈ 3.14159 × 4900 ≈ 15,400.

However, the closest provided choice to these calculations, considering possible rounding or approximation, is indeed 15,386 sq ft. This demonstrates why this option is the correct answer in alignment with the standard mathematical process for determining the area of a circle based on its diameter.