Uranium-238 Decays to Form Thorium-234 with a Half-Life of 4

question 66

Multiple Choice

Uranium-238 decays to form thorium-234 with a half-life of 4.5 10⁹ years.How many years will it take for 75% of the uranium-238 to decay?

• A)9.0 10⁹ years
• B)4.5 10⁹ years
• C)4.5 10¹⁰ years
• D)9.0 10¹⁰ years
• E)3.8 10⁹ years

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Definitions:

Loss

A situation in which expenses exceed revenues, leading to negative profit.

Monopolistic Competitor

In market economics, a monopolistic competitor refers to a company operating in a sector filled with competitors, yet it has enough differentiation to have some control over its pricing.

Downward Sloping

A description of a curve or line that shows a decrease in one variable as another variable increases, commonly seen in demand curves.

Demand Curves

Graphical representations showing the relationship between the price of a good and the quantity demanded by consumers.