sixsigma

For number one, i have to choose between two answer choices. the first one is: the relationship of a measurement to an accepted standard the second one is: the limitations of the measuring instrument. But my teacher said before that accuracy and precision are different and that the relationship to an "accepted" standard is accuracy. But then the second choice doesn't really sound correct either. I'm stuck in a dilemma :S

The thing is that my teacher didn't really explain us anything. It would be nice if you guys can help me out?

1. Does precision describe the relationship of a measurement to an accepted standard or the limitation of the measuring instrument? to me the relationship of an accepted standard sounds more like an accuracy. what do you guys think? It's on my homework and these two are the choices. 2. How many significant figures does 40.005 00 have? Also, how can significant figures indicate precision? PLEASE REPLY