11. Here are some data about countries in North America.
Country
Population
in 2004
Area (km)
Canada
32 507 874
293 027 571
104 959 594
9 984 670
9 629 091
U. S.
Mexico
1972 550
a) How much space does each person have in each country?
b) By what percent does:
i) the population of Mexico exceed that of Canada?
ii) the area of Canada exceed that of Mexico?
c) Make up, then solve your own problem about these data.
Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?