What invention, at the end of the medieval period, made books less expensive, helping to spread literacy and independent thought to more Europeans

Why might it be important to know a currency’s exchange rate

"the plan of removing the aboriginal people who yet remain within the settled portions of the united states . . approaches its consummation. . an extensive region . . has been assigned for their permanent residence. it has been divided into districts and allotted among them. many have already removed and others are preparing to go. . " removal of southern indians to indian territory, 1835 this passage is most closely related to a) imperialism. b) the civil war. c) westward expansion. d) the french indian war.

What primary benefit did theodore roosevelt’s see in digging a canal through panama?