To Find: The percentage of radioactive elements remains after a given time.
The option ( D ) is correct.
Given data: The half-life of radium-226 is about 1600 years, the amount remains after 4000 years is,
Method/Formula used:
The half-life time (period)
Here,
Calculation:
The half-life of radium-226 is 1600 years, let the amount remains after 4000 years is
Substitute,
Therefore, the percentage of radium-226remains after 4000 years,
Hence, option B is correct.
Chapter 14 Solutions
High School Math 2015 Common Core Algebra 2 Student Edition Grades 10/11
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