the answer is 4 all you have to do is multiply 0.4 x 10
The invention of the printing press
I presume you are talking about the 1930s, and if so, the economy during the 30s was in shambles and the period was called the great depression. Unemployment was at an all time high and people were starving due to extreme poverty.
The world’s population consists of an estimate of 7 billion, and although it has been increasing each year, it is unevenly distributed. Large cities, in countries like China, India and United States, have the world’s largest population density, that is the number of people per square kilometer. Meanwhile, in rural areas, population density is significantly lower. To this year, the most populated country is China.
