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# How many significant digits does 2700 have?

Introductory chapter of University Physics book says there are Two significant digits in 2700. Why Two? Shouldn't it be Four?

Note: Don't forget the decimal

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2.7e3 has Two significnat digits. My question is why 2? why not 4?

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The original (2700) had 2 significant figures and a least significant decimal of 2.

The new format (2700.) has 4 significant figures and a least significant decimal of 0.