What was the first thing that was mad in the history

Pls! does anybody know a shortcut for answering these types of questions in the future?

State one method by which you can recognize a perfect square trinomial.

The poll report includes a table titled, “americans using cash now versus five years ago, by age.” the age intervals are not equal. why do you think the gallup organization chose the age intervals of 23–34, 35–54, and 55+ to display these results?