If the economy is in equilibrium at $600 billion national income and if MPC = 0.75 and intended investment is $25 billion, what happens to national income when intended investment increases to $30 billion? It will

Industria specializes in the production of heavy machinery. It exports machinery to the rest of the world and imports oil from the Gulf countries. Based on this information, we can conclude that Industria is a(n) ________ economy

A) closed B) communist C) command D) open

Refer to the scenario above. If the local government has a progressive tax system, which family pays the largest amount as tax?

A) The first household B) The second household C) The third household D) The fourth household