Solve the Problem $\mathrm { A } = \mathrm { Ie } \mathrm { kt } , \mathrm { A }$

question 101

Multiple Choice

Solve the problem.
-In the formula $\mathrm { A } = \mathrm { Ie } \mathrm { kt } , \mathrm { A }$ is the amount of radioactive material remaining from an initial amount I at a given time $t$ and $k$ is a negative constant determined by the nature of the material. A certain radioactive isotope decays at a rate of $0.175 \%$ annually. Determine the half-life of this isotope, to the nearest year.

• A) \(286 \mathrm { yr }\)
• B) \(172 \mathrm { yr }\)
• C) \(396 \mathrm { yr }\)
• D) \(4 \mathrm { yr }\)

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Definitions:

Situational Factors

External forces that influence individuals' behavior and decision-making in specific contexts or environments.

Outgroup Heterogeneity Effects

The tendency to perceive members of an outgroup as more similar to each other than members of one's ingroup, often leading to stereotypes.

Stereotypes

Overgeneralized beliefs or expectations about the characteristics, behaviors, and roles of a particular group of people.

External Attributions

The process of attributing the cause of one's own or others' behaviors and outcomes to external factors.