Plate tectonics refers to the theory that

The united states economy is one in which producers are generally free to produce what they want and consumers are free to purchase what they desire, so long as no laws are broken. at the same time, however, the government does regulate some aspects of the economy. the u.s. can best be described as which of the following a mixed economy b liberated economy c command economy d market economy

What does it mean when a government decides to do something?

Most of the workers who laid the central pacific railroad were?