Assume the following conditions: In the United States it takes 5 units of resources to produce a ton of potatoes and 10 to produce a ton of coal. In Canada it takes 6 units of resources to produce a ton of potatoes and 9 to produce a ton of coal. According to the theory of absolute advantage, . A) the United States should export potatoes to Canada and import coal from Canada
B) the United States should export coal to Canada and import potatoes from Canada
C) the United States should import both potatoes and coal from Canada, while concentrating on production of more valuable goods
D) there would be no basis for trade

6.3%

explanation:

the acceptance rate for yale university is 6.3%. this means that only 6 percent of people who apply actually get accepted!

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals