How many square feet could you treat with a hand sprayer holding 1 gallon if 4 oz of spray is needed for 100 square feet?

To determine how many square feet can be treated with a hand sprayer holding 1 gallon, you first need to convert the 1 gallon measurement into fluid ounces. There are 128 fluid ounces in a gallon.

Given that 4 ounces of spray is needed to treat 100 square feet, you can calculate how many 4-ounce doses are available in 128 ounces. Dividing 128 ounces by 4 ounces per dose shows that you can get 32 doses from a gallon.

Next, multiply the number of doses (32) by the area each dose covers (100 square feet). This calculation results in 3,200 square feet that can be treated with 1 gallon of spray.

Thus, the correct answer is that you can effectively treat 3,200 square feet with a hand sprayer holding 1 gallon when utilizing 4 ounces of spray per 100 square feet.