This problem set covers gains from trade due to the scarcity of resources, production possibilities, and specialization. Topics include understanding production possibilities frontiers (PPFs), opportunity cost, absolute and comparative advantage, specialization of production, and gains from trade.

City l has a temperature of −3 °f. city m has a temperature of −7 °f. use the number line shown to answer the questions: number line from negative 8 to positive 8 in increments of 1 is shown. part a: write an inequality to compare the temperatures of the two cities. (3 points) part b: explain what the inequality means in relation to the positions of these numbers on the number line. (4 points) part c: use the number line to explain which city is warmer. (3 points)