I can't see it clearly the questions ?
She should by the one that is written as 375/1000 inches because if Trudy needs a nail that measures 0.375 she should get that one and also .375 and 375/1000 is really the same thing. hope it helps
(2,3) , (0,-3) , (-2,1) are the points.
Hope this helps... Let me know if you wanna know anything.