Nder our constitution, some powers belong to the federal government. what is one power of the federal government?

How do i use this to get the right answer

This excerpt from article il of the u.s. constitution describes which of thepresident's major functions?

Before tuberculosis was understood to be a communicable disease, and before the discovery of antibiotics to treat it, a major outbreak could kill or cripple a significant portion of a nation’s labor force. how would such an event affect the economy? illustrate the effect by dragging to shift either the aggregate demand curve or the long-run aggregate supply curve.