A Radioactive Source Has a Half-Life of 2 Min

question 24

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.The counting rate at t = 4 min will be

• A)1500 counts/s
• B)750 counts/s
• C)375 counts/s
• D)188 counts/s
• E)94 counts/s

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Definitions:

Cost Drivers

Factors that cause a change in the cost of an activity, used in activity-based costing to allocate costs accurately.

Revenue Variances

The difference between actual revenue and budgeted or projected revenue.

Spending Variances

The difference between actual spending and budgeted or planned spending in various categories.

Cost Drivers

Factors that cause changes in the cost of an activity or process, which are used to allocate costs based on actual usage or consumption.