We can watch the phases of the moon change, day by day. a complete cycle of phases takes about to complete. a) a year b) a decade c)one month d) a quarter of a year

Which situation is the best example of opportunity cost? a country chooses to produce bananas instead of wheat. a country chooses to invest in manufacturing and agriculture. a country chooses to specialize in producing paper products. a country chooses to export all of its products.