How did the printing press impact martin luther cost-wise? (provide a website)

What was the 1787 constitutional convention? !

Iron making developed in china almost a thousand years later than in the middle east. true false

The telegraph, the transatlantic telegraph cable, and the telephone were important to businesses after 1850 because of a. they created a system for developing new inventions. b. they filled a need that other inventions of the day could not. c. they attracted investors and created the stock market. d. they made picture-taking a popular american pastime.