Carbon-11 Is Used in Medical Imaging

question 39

Multiple Choice

Carbon-11 is used in medical imaging.The half-life of this radioisotope is 20.4 min.What percentage of a sample remains after 75.0 min?

• A) 76.2
• B) 2.53
• C) 7.83
• D) 27.2
• E) 3.68

---

Definitions:

Core Principle

A fundamental belief or guideline that is foundational to a system, theory, or philosophy.

Cognitive Processes

Involve the brain's functions in processing information, including thinking, reasoning, problem-solving, and understanding language.

Separated Knowing

A critical thinking approach where the thinker remains detached and evaluates the validity of arguments without considering the context or relational aspects.

Connected Knowing

Connected knowing refers to an epistemological approach characterized by understanding and knowing through empathetic connections with others and valuing subjective experiences.