A 50-Mg Sample of Iodine-131 Was Placed in a Container

question 23

Multiple Choice

A 50-mg sample of iodine-131 was placed in a container 32.4 days ago.If its half-life is 8.1 days,how many milligrams of iodine-131 are now present?

• A)47.3 mg
• B)3.1 mg
• C)3.24 mg
• D)0.81 mg
• E)6.2 mg

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Definitions:

Specific Assets

Assets identified and designated for a particular purpose or project, often tied to securing a specific obligation.

Appreciation

A term used in finance and economics to describe the increase in value of an asset over time.

GPS

Global Positioning System, a satellite-based navigation system that provides location and time information in all weather conditions.

Satellite Global Positioning System

A network of satellites that provide navigation data to military and civilian users around the globe, enabling users to determine their exact location.