You are applying a pesticide to a circular area with a 20 foot diameter. What is the area?

To calculate the area of a circular area, you can use the formula for the area of a circle, which is A = πr², where "A" is the area and "r" is the radius of the circle.

In this case, the diameter of the circular area is given as 20 feet. The radius is half of the diameter, so you would divide the diameter by 2 to get the radius:

Radius (r) = Diameter / 2 = 20 feet / 2 = 10 feet.

Once you have the radius, you can substitute it into the area formula:

A = π(10 feet)² = π(100 square feet).

If you use 3.14 as an approximation for π (pi), the calculation would be:

A ≈ 3.14 * 100 square feet ≈ 314 square feet.

This means that the area of the circular area with a 20-foot diameter is approximately 314 square feet. The selection of this option reflects an understanding of basic geometric calculations, specifically the area of a circle and the relationship between diameter, radius, and area.