Data on trade barriers and the growth of per capita GDP indicate that Question 9 options:

A. there is no link between the degree of a country's trade openness and its economic growth.

B. more open economies have grown more rapidly than those that have imposed substantial barriers restricting trade.

C. economies that have imposed high trade barriers have, on average, grown more rapidly than economies that are more open to international trade.

D. countries with higher trade barriers have been able to achieve higher levels of per capita GDP than those that are more open to international trade.

E. both c and d are correct.

Areal estate agent is considering changing her cell phone plan. there are three plans to choose from, all of which involve a monthly service charge of $20. plan a has a cost of $.42 a minute for daytime calls and $.17 a minute for evening calls. plan b has a charge of $.52 a minute for daytime calls and $.15 a minute for evening calls. plan c has a flat rate of $80 with 275 minutes of calls allowed per month and a charge of $.38 per minute beyond that, day or evening.a. determine the total charge under each plan for this case: 150 minutes of day calls and 70 minutes of evening calls in a month. (do not round intermediate calculations. round your answer to 2 decimal places. omit the "$" sign in your response.)c. if the agent will use the service for daytime calls, over what range of call minutes will each plan be optimal? (round each answer to the nearest whole number.include the indifference point itself in each answer.)d. suppose that the agent expects both daytime and evening calls. at what point (i.e., percentage of total call minutes used for daytime calls) would she be indifferent between plans a and b?