A Radioactive Isotope Has Decayed to the Point That One-Eighth

question 26

Multiple Choice

A radioactive isotope has decayed to the point that one-eighth of the original content is left.How many half-lives have passed?

• A)0
• B)1
• C)2
• D)4

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Definitions:

Common Resource

A resource, like air or water, that is accessible to all members of a society but subject to overuse and depletion.

Negative Externalities

Costs suffered by a third party due to an economic transaction they were not involved in.

Public Goods

Goods that are non-excludable and non-rivalrous, meaning individuals cannot be effectively excluded from use and where use by one individual does not reduce availability to others.

Marginal Social Benefit

The additional benefit to society from consuming one more unit of a good or service, considering both private and external benefits.