¹³¹I,which Has a Half- Life Time of 8 Days,is Used

question 35

Multiple Choice

¹³¹I,which has a half- life time of 8 days,is used in nuclear medicine to monitor the hormone production in the thyroid in a patient.A sample of ¹³¹I containing 5 * 10¹⁰ atoms is produced in a nuclear reactor.Due to the short half- life time,the sample emits less radiation with time.However,it is usable as long as there are at least 1.25 * 10^{10 131}I atoms present.What is the maximum time before the sample is no longer usable?

• A)16 days
• B)12 days
• C)8 days
• D)6 days

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Definitions:

Master Budget

A comprehensive financial plan for an organization, encompassing all of its budgets for sales, production, overhead, etc., for a specific period.

Long-Range Budget

A financial plan that extends beyond the typical fiscal year, often spanning three to five years, to support strategic planning.

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A budgeting process where both management and employees participate in setting budgets, improving accuracy and commitment.

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The practice of underestimating revenue or overestimating expenses while preparing a budget to create a cushion or slack for unexpected situations.