In the supply-and-demand schedule shown above, at a price of $50, producers supply cell phones and consumers demand cell phones.

200,450
450,200
300,300

the world may never know

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according to the map, most industrialization in europe occurred in the northwest.

the production of coal and lignite deposits was profitable throughout western europe.

the building of railroads transport goods throughout europe.

according to the map, the population trend indicates that more people are moving into cities.

northwest

coal and lignite depostis

railroads

cities