Some of the main domestic problems that faced President Vladimir Putin in Russia had to do with political dissidence, since he was accused of forcefully putting down voices that rose in opposition to his regime. Another problem was doing away with some of the old Cold War mentalities of the past. <span />
Answer:
The first mechanical calculator was invented by the French mathematician Blaise Pascal
The name is Pre-Cambrian era
Subsistence crops are grown for the direct benefit of the farmer and their family. Cash crops are grown to deliberately be sold. ... Cotton makes a poor subsistence crop because you can't eat it and it has to be processed before it's useful (ginned, spun and woven)
