___ is defined as; A series of steps followed to solve problems includin
collecting data, formulating a hypothesis, testing the hypothesis, and stating
conclusions.

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.

How did women’s roles in the workforce change during world war i?

How did the geography of the arabian peninsula affect its religious and cultural diversity?