Mr. Bubba took a spring break trip with kids and parents to Dubai in the United Arab Emirates. The money they use there is UAE Dirham. The kids were surprised to learn that a coke out of the machine cost 4 Dirham and a McDonald's Big Mac meal cost 25 Dirham. They were worried that they would run out of money because everything was so expensive. However, Joe Bob pulled out a sheet of paper Mr. Bubba had given him that said $1 = 3.75 Dirham. The kids were relieved that things were not that expensive. What economic term is this an example of and made the kids feel better about their money? A.
Exchange Rate

B.
Supply

C.
Demand

D.
Currency

idk

Explanation:

idk

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