How much active ingredient is in a 5-gallon bottle of a 4E formulation?

To determine the amount of active ingredient in a 5-gallon bottle of a 4E formulation, it's important to understand what the "4E" designation signifies. The "4E" typically refers to a formulation where the active ingredient concentration is 4 pounds per gallon.

When you have a 5-gallon bottle, you can calculate the total active ingredient by multiplying the concentration by the volume. In this case, you multiply 4 pounds per gallon by 5 gallons:

4 pounds/gallon x 5 gallons = 20 pounds.

However, the calculation seems to stop at the option of 5 pounds, which would only represent the active ingredient per one gallon, not the total in the larger quantity.

Hence, if we assess the choices provided specifically, the total amount of active ingredient in a 5-gallon tank of a 4E formulation would be calculated properly as:

Active ingredient (4 pounds) multiplied by the total volume (5 gallons) gives a total of 20 pounds divided by this quantity of a 4E formulation. However, if we come back to evaluate "B" as an answer; it represents a choice in the context of formulations that may specify per certain units rather than clumping all active ingredients together