Agraph shows election years on the horizontal axis and percentage of voters on the vertical axis. 40% voted in 2006. 62% voted in 2008. 42% voted in 2010. 58% voted in 2012.
look at the information in this bar graph.

based on this graph, what conclusion can someone draw?

voters were not interested in the issues in 2008.
2008 and 2012 were presidential election years.
the majority of americans vote in every election.
women boycotted the polls in 2010.

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

a sample of water is taken and kept in a beaker in a freezer at a constant temperature of 0°c. if the system is at dynamic equilibrium, which of these statements is true?