What is disadvantage of a mercator projection .1it does not include all of the continents.2.it does not show many detail of earth surface.3. it too large to be carried easily. 4.it show correct shape but not true sizes

The Mercator projection is a cylindrical map projection. It shows the correct shape and direction, but does not show the correct sizes. The size is distorted by a lot north or south of the Equator. 

1920 census

the census was scheduled for january the 1st, as the government believed that more farmers would be in their homes by that time instead of april. the census did not ask about unemployment, the number of children, and how long was a couple married were not taken into consideration. individuals were considered as residents of the places they normally slept, not the places were they worked at or visited.

2010 census

the census was scheduled for april 1st, 2010. it was the shortest census in history: it only contained 10 questions related to name, age, gender, ethnicity, relationship, and whether the citizen owned a home or rented one. the government launched a website in order to provide the citizens with information regarding the census. there were also "teach census weeks" in schools nationwide.

Ais 190 b is 200c it can't be more then 100%