Which is ordered least to greatest -1.5,-2,0,2/5,3/4 or -2,-1.5,0,3/4,2/5 or |-1.5|,-2,0,2/5,3/4

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.

Can you me find the missing length. i attached an image.

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.