If you spray 3 gallons on a 0.25 acre strip, what's the GPA?

• A. 9
• B. 8
• C. 15
• D. 12

Answer: (D)

GPA measures the spray rate as gallons per acre. To find it, divide the total gallons sprayed by the area treated. Spraying 3 gallons on 0.25 acre means 3 ÷ 0.25, which equals 12 gallons per acre. You can also see this by noting that 0.25 acre is a quarter of an acre, so multiplying the sprayed amount by 4 scales it up to a full acre: 3 × 4 = 12. So the GPA is 12 gallons per acre. The other numbers would come from spraying the same 3 gallons over different areas (for example, about 0.333 acre gives 9 GPA, 0.375 acre gives 8 GPA, 0.2 acre gives 15 GPA), but with the given area, the correct rate is 12.