How might you explain the trend in voting on the ratification of the ERA in the Northeast?

Brainliesttt !me : ) what brought about the end of the soviet union?

List a few examples of city-states that practiced oligarchy in ancient greece

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.