Why do most cities in the united states now have more radios but fewer radio repair shops than they did in 1960?

The platt amendment was a treaty that allowed the united states to build military bases in which country?

What is the difference between a journal entry written by an eyewitness to an event and a play written about the same event? a. the journal entry is a historiographical source, while the play is a periodical source. b. the journal entry is a chronological source, while the play is a primary source. c. the journal entry is a primary source, while the play is a secondary source. d. the journal entry is a secondary source, while the play is a periodical source.

Prince henry the navigator promoted the study of navigation and sponsored several voyages along africa's west coast. what country was henry the navigator from?