How did the effects of the mongol conquest differ in th china, russia, and persia?

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.

In 1819, what did the united states obtain from spain for $5 million?

Question 6 of 27 1 point which of the following best describes the three-fifths compromise at the constitutional convention? o a. no more than three-fifths of a state's population could include slaves. o b. three-fifths of a state's slaves had to be released within 20 years. oc. slaves would be counted as three-fifths of a person when determining representation in congress. od. three-fifths of a state's population had to vote for slavery if a territory was to enter the union as a slave state. g