What techniques did advertisers use to promote products during the 1920s? Are those techniques the same or different from the techniques advertisers use today? How or how not?

they used band wagaon as one example.

Explanation: people still use this for ads

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:

number   5 i know this because savannah was the first capital and i took the test and all you have to do is look up a map of georgia savannah.