What is the gallons per acre (gpa) rate if the output of the sprayer is 4 gpm and the apm is 0.023?

To determine the gallons per acre (gpa) rate given a sprayer output of 4 gallons per minute (gpm) and an application per minute (apm) of 0.023, you can use the following calculation:

1. First, identify the total area that can be covered in one minute. Since the sprayer outputs 4 gpm and the application rate is 0.023 acres per minute, you can calculate the output in gpa as follows:

[

\text{gpa} = \frac{\text{gpm}}{\text{apm}}

]

2. Plugging in the values:

[

\text{gpa} = \frac{4 , \text{gpm}}{0.023 , \text{apm}} \approx 173.91 , \text{gpa}

]

3. When rounded, this gives you approximately 174 gpa.

Therefore, the correct calculation leads to the gallons per acre rate being 174 gpa, which corresponds to the chosen answer. Understanding this calculation process is important for accurately managing application rates in aquatic weed control, ensuring effective treatment while minimizing environmental impact.