Radon-222 Has a Half-Life of 3

question 33

Multiple Choice

Radon-222 has a half-life of 3.8 days. A sample from a basement in Colorado was analyzed 5.0 days after it was collected and found to have an activity of 0.17 Bq. What was the original activity of this sample?

• A)0.22 Bq
• B)0.32 Bq
• C)0.42 Bq
• D)0.62 Bq
• E)0.52 Bq

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Definitions:

Inventory

The goods and materials a business holds for the ultimate goal of resale or processing.

Days In Inventory

A financial metric that indicates the average number of days a company holds inventory before it is sold, calculated by dividing inventory by cost of goods sold and multiplying by 365.

Inventory

Materials and products that are held by a company for the purpose of sale or production.

Inventory Turnover

A measure of how frequently a company sells and replaces its stock of goods during a specific period, indicating the efficiency of inventory management.