If the area to be sprayed is 3 pounds of formula per 100 gallons of water, how much formula would be needed for 50 gallons?

To determine how much formula is needed for 50 gallons of water when the application rate is 3 pounds of formula per 100 gallons, you can set up a proportion based on the information provided.

First, calculate the amount of formula needed per gallon. Since 3 pounds is needed for 100 gallons, you can divide 3 by 100 to find the amount per gallon:

3 pounds / 100 gallons = 0.03 pounds per gallon.

Next, to find the total amount of formula needed for 50 gallons, multiply the pounds per gallon by the number of gallons:

0.03 pounds per gallon × 50 gallons = 1.5 pounds.

Therefore, the correct amount of formula required for 50 gallons of water is 1.5 pounds, illustrating how proportional reasoning is applied in pesticide application rates to ensure effective and safe use of chemicals.