Between 1800 and 1910, the percentage of the U.S. population living in cities of 100,000 residents or larger went from ____ percent to roughly ___ percent

a. 15; 20
b. 10; 20
c. 5; 20
d. 0; 20

d. 0; 20

Economics

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The process of commercializing a new technology is called

a. invention b. adaptation c. research and development d. innovation e. all of the above

Economics

In the simple Keynesian framework, the price level

A) is fixed. B) varies directly with unemployment. C) varies inversely with wages. D) is indeterminate.

Economics