The Half-Life of a Certain Radioactive Substance Is 7 Years

question 5

Multiple Choice

The half-life of a certain radioactive substance is 7 years. What is the yearly percentage decay rate for this substance?

• A) 7.35%
• B) 9.43%
• C) 10.32%
• D) 7.14%

---

Definitions:

Merit

A quality of being particularly good or worthy, typically used to acknowledge or reward someone's achievement or quality.

Benevolence

The quality of being well-meaning; kindness or the desire to do good and act generously towards others.

Prosocial Behavior

Voluntary behavior intended to benefit another person, such as helping, sharing, or providing comfort.

Empathy

The ability to understand and share the feelings of another person from their perspective.