A Rock Sample Contains 1/8 Micrograms of the Parent Radioactive

question 24

Multiple Choice

A rock sample contains 1/8 micrograms of the parent radioactive isotope Al-26 and 7/8 micrograms of its daughter isotope Mg-40. If the half-life of this decay is approximately 700,000 years, how old is this rock?

• A) 2.1 million years
• B) 2.8 million years
• C) 1.4 million years
• D) 700,000 years

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Definitions:

Marginal Revenue Product

The increase in revenue generated from the use of one more unit of a factor of production.

Perfect Competitor

A theoretical market structure where many firms sell identical products, allowing no single firm to influence market prices.

Imperfect Competitor

A firm or entity in a market structure that does not meet the criteria of perfect competition, often having some control over price.

Output Price

The price at which goods or services produced by a company are sold in the market.