Answer: your answer for number 1 is decade millennium or century
Your answer for number 2 is a d or b .
Hope this helps.
Explanation:
it is impossible for a map projection to be accurate. the most common one is the mercator projection. Many projections have been tried but all very flawed. the most reliable form of a map is a globe but of course, it's not a projections...so.
The number of people per square mile is the population density
