In calibrating your sprayer after spraying 1/8 acre, you poured 4 1/8 gallons of water back to refill your 100 gallon tank. How many gallons of spray are you spraying?

To determine how many gallons per acre (GPA) you are spraying, you need to calculate the amount of spray applied over the area you treated. The question states that after spraying 1/8 acre, you poured back 4 1/8 gallons of water to refill your 100-gallon tank.

First, you can convert the fraction of a gallon into decimal for easier calculation: 4 1/8 gallons is equal to 4.125 gallons. This amount represents the volume of water that was used to treat 1/8 acre.

Next, to find gallons per acre, you would first determine how many gallons are used per acre by scaling up the amount of water used for 1/8 acre. Since 1/8 of an acre is a fraction of an acre, you would multiply the gallons used by 8 to find out how much would be used for a full acre:

4.125 gallons × 8 = 33 gallons per acre.

Hence, the calculation shows that the spray volume applied per acre equates to 33 GPA. This indicates that option C is correct, as it accurately reflects the calculated rate at which the sprayer is applying the spray solution.