Why did the west african kingdoms of ghana, mali, and songhai experienced economic prosperity

An important accomplishment of the chinese during the han dynasty was the a. invention of paper. b. production of bronze tools. c. construction of the great wall. d. building of royal tombs.

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.

Profit is the term for that is left over after the costs have been paid in a budget or business. a) money. b) supply. c) demand. d) tax