What is the transcontinental railroad?

Under the new imperialism europe did not need large numbers of people to control territories because of

The event shown in the map is a cause of which of the following? *pic* gadsden purchase battle of the alamo bear flag revolt settlement of texas

Which is not a claim kennedy made? a. the fact that communist cuba is so close to american soil is one reason we need to accelerate our space program. b. his decision to shift the study of space to one of the highest american priorities was one of his most important decisions as president. c. within these last months at least 45 satellites have circled the earth. (i think it's this one) d. the mariner spacecraft now on its way to venus is the most intricate instrument in the history of space science. i need this answer really quick, so .