When calculating surfactant for a 1,200-gallon tank, how many liquid ounces are needed if the label calls for 4 ounces per 100 gallons?

To determine how many liquid ounces of surfactant are needed for a 1,200-gallon tank when the label specifies 4 ounces per 100 gallons, you start by establishing how many "100-gallon" units there are in 1,200 gallons.

First, calculate the number of 100-gallon increments in 1,200 gallons. This can be done by dividing 1,200 by 100, which gives you 12. This means there are 12 increments of 100 gallons in a 1,200-gallon tank.

Next, since the label calls for 4 ounces of surfactant for each 100 gallons, you would multiply the amount needed for one increment (4 ounces) by the total number of increments (12):

4 ounces x 12 = 48 ounces.

Thus, for a 1,200-gallon tank, you would need a total of 48 liquid ounces of surfactant. This confirms that the correct answer is 48 liquid ounces.