If disposable income rises from $15,000 to $20,000 and the marginal propensity to consume equals 0.9, then saving must increase by $500

The point that each glass of lemonade consumed on a hot day brings lower and lower levels of satisfaction is known as the principle of

A) total benefits. B) increasing marginal cost. C) decreasing marginal benefit. D) increasing opportunity cost. E) decreasing marginal price.

Munn v Illinois (1877) was particularly important with regard to government regulation because it

(a) upheld the traditional right of businesses to act freely without interference by government. (b) established the right of government to regulate any business that was deemed "clothed" in the public interest. (c) established the right of government to regulate any and all businesses wherever such regulation was deemed desirable to promote competition. (d) established the right of government at any level to regulate any business activity if such regulation was deemed desirable for any reason.