One cubic foot holds 7.48 gallons of water, and one gallon of water weighs 8.33 pounds. how much does 6.26.2 cubic feetfeet of water weigh in pounds? in ounces

In this question, you are given the water volume(6.2 cubic ft) and the water density (8.33 pounds/gallon). To find the water mass you need to multiply the volume with density, but you need to convert it so they have same unit.
The calculation would be:

mass = volume x density
mass = 6.2 cubic ft x 7.48 gallon/cubic ft x 8.33 pound/gallon= 386.31208 pounds.
In ounce it will be=  386.31208 pounds x 16 ounce/pouns= 6180,99328 ounces