Can someone look at this picture and me? explain your answer aswell

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)