How would you represent the number “25” using the Mayan number system?

Reread patrick henry’s quote about the continental congress. what change was taking place in how the colonists saw themselves?

In order to get a consensus between anti-federalists and federalist to be able to forward on the constitution, james madison advocated for a bill of rights. what was the purpose of the bill of rights for citizens of the united states?

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.