What Fraction of the Initial Amount of an Isotope Remains

question 18

Multiple Choice

What fraction of the initial amount of an isotope remains after five half-lives?

• A)0.200
• B)0.969
• C)0.0100
• D)0.0313
• E)1.00 × 10^-10

---

Definitions:

Market Price

The current market price for acquiring or disposing of an asset or service.

Interest Revenue

Income earned from investments, loans, or other financial instruments that pay interest, contributing to a company's total revenue.

Dividends

Payments made out of a company's earnings to its shareholders, based on the number of shares held.

Trading Securities

Trading securities are investments in debt or equity that a company plans to actively buy and sell to generate profit from short-term fluctuations in their prices.