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

question 33

Multiple Choice

A rock sample contains 1/8 micrograms of the parent radioactive isotope Aluminum-26 and 7/8 micrograms of its daughter isotope Magnesium-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:

Cost Of Production Report

A document that details the total cost and production quantities of a product or products over a specified period of time.

Job Cost Cards

Documents used to record and track the costs associated with a specific job or project, aiding in the calculation of profitability and efficiency.

Equivalent Units

A concept used in cost accounting to express the amount of work done by incomplete units in terms of complete units of output.

First-In, First-Out

An inventory valuation method that assumes goods are sold in the order they are acquired, so older inventory is used up first.