What is the area in acres of a rectangular field measuring 620 feet by 1280 feet?

To determine the area of a rectangular field measured in acres, it's necessary to first calculate the area in square feet and then convert that to acres.

The area of a rectangle is calculated by multiplying the length by the width. In this case, the dimensions of the field are 620 feet and 1280 feet. Therefore, the area in square feet is:

Area = Length × Width = 620 feet × 1280 feet = 793,600 square feet.

Now to convert square feet to acres, it's essential to know the conversion factor: 1 acre is equivalent to 43,560 square feet.

To find the area in acres, divide the area in square feet by the number of square feet per acre:

Area in acres = 793,600 square feet ÷ 43,560 square feet/acre ≈ 18.25 acres.

Considering the options provided, rounding this figure gives approximately 18.2 acres, making it the correct choice.

This conversion process and understanding of area formulas are crucial for aerial applicators, as they often need to assess field sizes for various applications, such as pesticide or fertilizer distribution.