What was the most powerful family in florence during renaissance period? how did they acquire their wealth? need !

About how many european immigrants were processed at the facilities on ellis island

Did the west show signs of cultural decline in the 20th century?

In ohio in 1872, the cleveland massacre was a)a violent labor dispute at standard oil refineries in cleveland. b)a takeover by standard oil of the refineries in cleveland. c)an attempt to stop standard oil from becoming a monopoly. d)a failed attempt by standard oil to take over other refineries.