How did john snow use maps to study the spread of cholera

What form of government is powers of states? first letter of the answer is r.

What event from world war l does the image most likely depict

What did this mean for dred scott? a. scott was not a citizen of the united states. b. scott was the property of the federal government. c. scott had no right to sue for his freedom in court. d. scott was considered the property of the slaveholding family.