You want to spray 30 shrubs in a plat bed. During a water only test, spraying an average size plant in the bed takes 15 seconds, and in doing so you collect 10oz of water. How much total spray mixture in gallons do you need to treat the total number of plants?

• A. 1.1 gallons.
• B. 6.2 gallons.
• C. 2.3 gallons.
• D. 3.0 gallons.

Answer: (C)

This question tests scaling a per-plant spray volume from a water-only test to a total for all plants and converting units.

From the test, one average plant uses 10 oz of spray. For 30 shrubs, total spray needed in ounces is 30 × 10 = 300 oz. Convert to gallons: 1 gallon = 128 oz, so 300 ÷ 128 ≈ 2.34375 gallons. Rounding to one decimal place to match the choices gives about 2.3 gallons. So the total spray mixture needed is approximately 2.3 gallons.