Why does a money economy begin to replace the barter economy on high middle ages as wars halted trade, merchants found new work metal smithing or creating coins as trade expanded to cover greater distance, a unit of exchange became more important. eastern merchants banded together to reject the barter economy in europe western merchants were no longer willing to negotiate with eastern nations

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explanation:

in mcculloch v. maryland (1819) the supreme court ruled that congress had implied powers under the necessary and proper clause of article i, section 8 of the constitution to create the second bank of the united states and that the state of maryland lacked the power to tax the bank.

gibbons v. ogden, (1824), was a landmark decision in which the supreme court of the united states held that the power to regulate interstate commerce, granted to congress by the commerce clause of the united states constitution, encompassed the power to regulate navigation.