Suppose the real exchange rate is 3/4 gallon of country a's gasoline per gallon of u. s. gasoline, a gallon of u. s. gasoline costs $3.00 u. s., and a gallon of gas in country a costs 6 units of their currency. what is the nominal exchange rate? a. 3/2 units of country a's currency per dollar. b. 8/3 units of country a's currency per dollar. c. 3/8 of a unit of country a's currency per dollar. d. none of the above is correct.

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?