**Milk is often sold by the gallon in plastic containers, (a) Estimate the number of gallons of milk that are purchased in the United States the year, (b) What approximate weight of plastic does this represent?**

**Answer:**

If each person drinks one gallon of milk in a week, and the population of the is 108 people, then the amount of milk purchased per year is

If it is assumed that a plastic gallon milk container weighs 0.1 lb, then the approximate weight of the plastic is