If you are instructed to mix 2.5 ounces of chemical per 1 gallon of water, how many ounces of chemical would be needed for 3 gallons?

To determine how many ounces of the chemical are needed for 3 gallons of water, you start with the provided mixing ratio of 2.5 ounces of chemical per 1 gallon of water.

To find the total amount required for 3 gallons, you multiply the amount of chemical needed for 1 gallon by the number of gallons:

2.5 ounces/gallon * 3 gallons = 7.5 ounces.

This calculation shows that for every gallon, 2.5 ounces of the chemical is necessary, and thus for 3 gallons, the total required would be 7.5 ounces. This is why the correct answer reflects the proper application of the ratio given and demonstrates an understanding of proportionality in mixing substances for park maintenance or other relevant practices.