A Certain Radioactive Isotope Has a Half-Life of Approximately 1500

question 162

Multiple Choice

A certain radioactive isotope has a half-life of approximately 1500 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 70% of that amount?

• A) 2605 yr
• B) 772 yr
• C) 702 yr
• D) 450 yr

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Definitions:

Wholesalers

Entities engaged in selling goods in large quantities to retailers, other merchants, or industrial, institutional, and commercial users.

North American Industry Classification System

A classification system that categorizes businesses into detailed sectors and industries, primarily to facilitate economic data analysis and reporting.

NAICS

The North American Industry Classification System; a standard used by federal statistical agencies for classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. economy.

Industry Definitions

Specific terms and jargon used within a particular sector to describe processes, tools, roles, and standards.