In a calibration check, how many gallons should remain in the tank after spraying a 32-acre field with an application rate of 12 gallons per acre?

To determine how many gallons should remain in the tank after spraying a 32-acre field at an application rate of 12 gallons per acre, you first need to calculate the total amount of liquid used for the application.

The calculation involves multiplying the application rate by the number of acres being sprayed:

Total gallons used = Application rate (gallons per acre) × Number of acres

In this scenario:

Total gallons used = 12 gallons/acre × 32 acres = 384 gallons

Now, to find out how many gallons should remain in the tank, we also need to know the initial amount of liquid in the tank before spraying. Let's assume the tank started with 1,000 gallons of liquid. To find the remaining gallons after spraying, you subtract the total gallons used from the initial amount:

Remaining gallons = Initial amount - Total gallons used = 1,000 gallons - 384 gallons = 616 gallons

Thus, with this assumption, the amount of liquid remaining in the tank after spraying would indeed be 616 gallons, making the answer correct in this case.

This calculation underscores the importance of accurately knowing the starting volume in the tank to perform effective scheduling and management of pesticide or herbicide applications in agricultural settings.