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

To determine the area of a circular area, you can use the formula for the area of a circle, which is A = πr², where "A" stands for area, "π" is approximately 3.14, and "r" is the radius of the circle.

In this scenario, the diameter of the circle is provided as 20 feet. The radius is half of the diameter, so you would calculate the radius as:

r = diameter / 2 = 20 feet / 2 = 10 feet.

Now, substituting the radius into the area formula gives:

A = π(10 feet)²
A = π(100 square feet)
A = 314 square feet (using π ≈ 3.14).

Thus, the area of the circular region is 314 square feet. Understanding this calculation is essential for anyone applying pesticides, as knowing the area helps in determining the correct amount of pesticide to use, ensuring both effectiveness and safety.