The Half-Life of a Radioactive Material Is 4

question 4

Multiple Choice

The half-life of a radioactive material is 4.5 days.How many days are required for a sample,with an initial activity of 1.0 × 10⁵ Bq,to decay to an activity of 100 Bq?

• A)45 days
• B)36 days
• C)54 days
• D)31 days

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Definitions:

Least Squares Estimate

A statistical method used to minimize the sum of square differences between observed and estimated data points.

Dependent Variable

A variable in an experiment or model that is expected to change in response to changes in other variables.

Independent Variable

Factors in an experiment that are deliberately changed to test their impact on outcomes, observed through changes in the dependent variable.

Mean Square Error

A metric used to measure the average of the squares of the errors, indicating the discrepancy between estimated and actual values.