When social institutions fail to meet the needs of the people, societies such as the united states often attempt to correct those failures. each of these is an example of this idea, except
a) the thirteenth amendment.
b) plessy v. ferguson.
c) the civil rights act of 1964.
d) brown v. board of education of topeka.

Profits are maximized when marginal revenue and marginal costs are a. set c. equal b. less than market price d. greater than market price

How did the incas unite the andes mountains?

Read the following passage. the early mill girls were of different ages. some were not over ten years old; a few were in middle life, but the majority were between the ages of sixteen and twenty-five. the very young girls were called "doffers." they "doffed," or took off, the full bobbins from the spinning frames, and replaced them with empty ones. based on the passage, early mill girls were mostly young. were mostly middle aged. were of a variety of ages. were mostly children.