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What is the percent activity of a radioactive sample (relative to its original activity) that has undergone four half-lives of decay?
Number Expression
A mathematical statement used to represent a quantity or to carry out a calculation.
Alma Mater
A school, college, or university from which one has graduated or attended.
Number Rules
Guidelines or principles related to the use, manipulation, and understanding of numbers in various contexts.
Number Expression
An arrangement of numbers and mathematical symbols that collectively represent a numerical value or equation.
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