A Radioactive Source Has a Half-Life of 2 Min $\times$ 10⁶
B)1

question 70

Multiple Choice

A radioactive source has a half-life of 2 min.At time t = 0 it is placed near a detector and the counting rate is observed to be 3000 counts/s.If the detection efficiency is 25%,how many radioactive nuclei are there at time t = 2 min?

• A)1.04 \(\times\) 10⁶
• B)1.67 \(\times\) 10⁶
• C)2.08 \(\times\) 10⁶
• D)3.41 \(\times\) 10⁶
• E)3.79 \(\times\) 10⁶

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Definitions:

Demand-Dependent Inventories

Inventory levels that are maintained based on current demand forecasts, adjusting to meet fluctuations in market requirements.

Aging Schedule

A report listing unpaid customer invoices and unused credit memos by date ranges, used to manage and monitor credit and collections.

Average Collection Period

The average number of days it takes for a business to receive payments owed by its clients.