What was the result of the supreme court ruling in plessy v. ferguson?

Rachel carson 1962 silent spring was a groundbreaking work regarding what topic

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

In the gettysburg address, which rhetorical device does abraham lincoln employ when he says, "the world will little note,nor remember what we say here, but ic never forget what they did here"?