Related to the Economics in Practice on Page 51: the Amazon

question 29

Multiple Choice

Related to the Economics in Practice on page 51: The Amazon Kindle and the electronic textbooks available for the Kindle are complementary goods. Electronic textbooks and traditional, hard-copy textbooks are substitute products. If the price of electronic textbooks for the Kindle decreases,

• A) demand for the Kindle increases, demand for electronic textbooks increases, and demand for traditional, hard-copy textbooks decreases.
• B) the quantity of Kindles demanded increases, demand for electronic textbooks increases, and the quantity of traditional, hard-copy textbooks demanded decreases.
• C) demand for the Kindle decreases, the quantity of electronic textbooks demanded increases, and demand for traditional, hard-copy textbooks decreases.
• D) demand for the Kindle increases, the quantity of electronic textbooks demanded increases, and demand for traditional, hard-copy textbooks decreases.

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Definitions:

Sleep

A naturally recurring state of mind and body, characterized by altered consciousness, relatively inhibited sensory activity, reduced muscle activity, and inhibition of nearly all voluntary muscles during rapid eye movement (REM) sleep phases.

Aging

The process of becoming older, which includes biological, emotional, intellectual, and social changes.

Hypothalamus

A region of the brain that regulates basic biological needs and motivational systems such as hunger, thirst, and body temperature.

Sleep

A natural condition that impacts both mind and body, marked by a change in consciousness, reduced sensory experiences, and a suppression of most voluntary muscle movements.