Iodine-131 Has a Half-Life of Eight Days

question 58

Multiple Choice

Iodine-131 has a half-life of eight days. A sample that originally contained 10 grams of iodine-131 now contains 1 gram. How much time elapsed between the two measurements?

• A) 16 days
• B) 24.2 days
• C) 26.6 days
• D) 33.3 days

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Definitions:

Total Income Yield

refers to the percentage of income an investment generates, considering both dividend or interest payments and capital gains.

Cash Payback Period

The duration required for an investment to generate cash flows sufficient to recover the initial investment cost.

Useful Life

The estimated duration a fixed asset is expected to be productive for its intended use, impacting depreciation calculations.

Net Cash Flows

The amount of cash that is generated or lost by a business during a given period, taking into account cash inflows and outflows from operating, investing, and financing activities.