Macroeconomics examines: a. how individual firms make choices, such as how they decide what prices to charge. b. the economy as a whole, such as how rapidly the economy grows. c. the economy as a whole, such as how much new machinery and equipment an individual firm decides to purchase. d. policy issues, such as how the government can influence the decisions of individual households. e. all of the above.

B. the economy as a whole, such as how rapidly the economy grows.

Explanation:

Macroeconomics examines the Macro and not individual.

the correct answer is economics is a game without winners or losers.

unlike sports or games economic is a game without losers or winner rather it is a game where everyone wins. parties of business doing businesses exchange money with each other and hence exchange is done on the basis of goods. one party takes the goods and other sales it so there is winner on both sides. each party values more highly the good it gets than the good it gives up. both sides exchange only because both intend to increase their value. so there is no concept of lose or win.

u = 30

continuing your method

= +

subtract from both sides

= - thus

= -

= ⇒ u = 30