Which term defines the distance from rest to crest, or from rest to trough? A amplitude
B speed
C period
D frequency

Explain the importance of president harry truman's order to integrate the u.s. military and the federal government.

Soon-yi's house has a hexagonal window made up of six identical equilateral triangles as pictured below.

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.