The Radioactive Isotope Tritium Decays with a First-Order Rate Constant

question 40

Multiple Choice

The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year¯¹. What fraction of the tritium initially in a sample is still present 30 years later?

• A) 0.19
• B) 0.60
• C) 0.15
• D) 2.8 *10¯³⁸
• E) None of these choices is correct.

Explain the impact of genetics and environment on obesity.

Understand the concepts of body image and societal influences on perceptions of attractiveness.

Describe how sexual behavior and motivations vary among individuals.

Recognize the role of brain structures in regulating eating behavior.

---

Definitions:

Revenue-Maximizing Price

The optimal price of a good or service that maximizes the total revenue for a seller.

Demand Function

An equation that describes the quantitative relationship between the demand for a good and various factors affecting it, such as price, income, and price of related goods.

Price Elasticity

A measure of how much the quantity demanded of a good responds to a change in the price of that good, reflecting the sensitivity of consumers to price changes.

Normal Goods

Normal goods are goods whose demand increases when consumer income rises, and decreases when consumer income falls, opposite to inferior goods.