A Rock Contains 0 $\rarr$ Pb-206 Is 4

question 37

Multiple Choice

A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238. The half-life of the decay series U-238 $\rarr$ Pb-206 is 4.5 * 10⁹ yr. Assuming no Pb-206 was present in the rock initially, how old is the rock

• A) 1.7 * 10⁹ yr
• B) 5.2 * 10⁹ yr
• C) 2.7 * 10⁶ yr
• D) 4.5 * 10⁹ yr
• E) 2.4 * 10⁹ yr

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Definitions:

Rich and Poor Countries

The classification of countries based on their economic status, with rich countries having high levels of income and wealth and poor countries having significantly lower levels.

Consumer Preferences

The particular goods and services that consumers demand, reflecting their tastes, desires, and needs.

Economic Shift

A significant change in the condition or direction of an economy, often marked by a variation in key economic indicators.

Production Possibility Frontier

The production possibility frontier is a curve illustrating the maximum feasible amounts of two commodities that a business can produce with its available resources and technology.