If an Isotope Has a Half-Life of 50 Million Years

question 14

Multiple Choice

If an isotope has a half-life of 50 million years and an 1/8 of the sample remaining consists of that isotope, the age of the rock from which it was taken is:

• A) 400 million years.
• B) 300 million years.
• C) 150 million years.
• D) 800 million years.
• E) none of the above

---

Definitions:

Utility Function

In economics, a representation of preferences over a set of goods and services by assigning values, indicating the level of satisfaction or utility derived from them.

Nuts

Edible seeds enclosed in a hard shell, often used as a source of nutrients and energy.

Berries

Small, pulpy, and often edible fruits, typically consumed fresh, frozen, or in various prepared foods and beverages.

Perfect Substitute

A perfect substitute is a good or service that can be used in exactly the same way as another, meaning consumers are indifferent between the two.