Rank the following goods from least to most elastic: high octane unleaded gasoline, unleaded gasoline, gasoline

"An objective of firms is to maximize profits". This statement:

a) has been proven by empirical testing to be always true. b) is a normative statement and thus cannot be tested. c) is an unrealistic assumption, and therefore of little use to economists d) is an assumption used by economists to predict the behaviour of firms. e) applies only to corporations

A zero-sum economy would result from

A. moderate economic growth. B. excessive growth after adjusting for inflation rates. C. a lack of economic growth. D. nominal GDP growth.