A Tiny Speck (8

question 102

Multiple Choice

A tiny speck (8.3 10^-7 mol) of radioactive americium-241 is used in smoke detectors. How many atoms of americium-241 are there in one of these smoke detectors?

• A)5.0 10¹⁷
• B)1.2 10²⁰
• C)2.9 10²²
• D)6.0 10²³
• E)8.3 10⁷

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Definitions:

Standard Deviation

A statistical measure of the dispersion or variability in a set of data, often used in finance to gauge the volatility of an investment.

Skewness

A measure of the asymmetry of the probability distribution of a real-valued random variable, indicating how much the distribution leans to the left or right of the mean.

Distribution

The process of making a product or service available for use or consumption by a consumer or business user.

Effective Annual Rate

The real return on an investment, considering the effect of compounding interest over a period, typically one year.