Ralph Wants to Buy Some Milk and a Box of Cereal

question 200

Multiple Choice

Ralph wants to buy some milk and a box of cereal. If Ralph buys 4 gallons of milk at $3.00 per gallon, the box of cereal costs $2.00. If he buys 5 gallons of milk, the box of cereal is free. For Ralph, the marginal cost of buying a fifth gallon of milk is:

• A) zero.
• B) $1.00.
• C) $2.00.
• D) $3.00.

---

Definitions:

Pine Seed

The seed of a pine tree, often known as a pine nut, used for reproduction of the species and as a food source for wildlife and humans.

Triploid

An organism or cell having three sets of chromosomes instead of the usual two.

Conifers

A group of cone-bearing plants that include trees such as pines, spruces, and firs, characterized by needle-like leaves.

Tracheids

Long, thin cells found in the xylem of vascular plants, facilitating water transport and providing structural support.