What mathematical concept
expresses the idea of "none"?

How did industrial production improvements impact export-dependent areas of the world during the great depression?   a.  demand for certain raw materials rose.      b.  demand for certain raw materials fell.      c.  the new technology was exported to most raw material producing nations.      d.  there was a decrease in tariffs.

Interest groups are protected by the first amendment guarantees of petition. and what other freedom?

Which statement best explains the privileges and immunities clause of article iv of the constitution?