What is the contour interval

The  franco-prussian  war, a  war  that was  led by prussia a coalition of  german  states, defeated  france. the  war  was the end  of  french  hegemony in europe and resulted in a unified  germany.  i hope this !

343^x = 49^4-xx = 4-xx+x=42x = 4x = 4/2x = 2therefore x = 2

The process by weathered rock and mineral particles are removed from one area and transported elsewhere

answer is. c