In the open-economy macroeconomic model, if for some reason foreign citizens want to purchase more U. S. goods and services at each exchange rate, then a. the demand for dollars in the market for foreign-currency exchange shifts right. b. the demand for dollars in the market for foreign-currency exchange shifts left. c. the supply of dollars in the market for foreign-currency exchange shifts right. d. the supply of dollars in the market for foreign-currency exchange shifts left.

Cereal type 1 sells for $1.50/kg. it should contain at least 22% protein, 2% of minerals and vitamins, and at most 30% of starch by weight. cereal type 2 sells for $1.00/kg. it should contain at least 30% starch by weight. what is the optimal product mix for the company?

Eileen's elegant earrings produces pairs of earrings for its mail order catalogue business. each pair is shipped in a separate box. she rents a small room for $150 a week in the downtown business district that serves as her factory. she can hire workers for $275 a week. there are no implicit costs. what is the marginal product of the second worker?

Companies in the u.s. car rental market vary greatly in terms of the size of the fleet, the number of locations, and annual revenue. in 2011 hertz had 320,000 cars in service and annual revenue of approximately $4.2 billion. the following data show the number of cars in service (1000s) and the annual revenue ($ millions) for six smaller car rental companies (auto rental news website, august 7, 2012). excel file: data14-09.xls if required, enter negative values as negative numbers. a. select a scatter diagram with the number of cars in service as the independent variable. b. what does the scatter diagram developed in part (a) indicate about the relationship between the two variables? c. use the least squares method to develop the estimated regression equation (to 3 decimals). ŷ = + x d. for every additional car placed in service, estimate how much annual revenue will change. by $ e. fox rent a car has 11,000 cars in service. use the estimated regression equation developed in part (c) to predict annual revenue for fox rent a car. round your answer to nearest whole value. $ million hide feedback partially correct