All zeros appearing in a number without a decimal point and to the right of the last nonzero digit are not significant unless indicated by a bar. Example: '1300' has two significant figures: 1 and 3. The zeros are not considered significant because they don't have a bar. However, 1300.0 has five significant figures.
So 10200 has 3 significant figures because it does not have a decimal point so the zeros after the 2 are not considered significant.
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How many significant figures are in 20.8
3 significant figures.
4 significant figures.
3 significant figures.
Five significant figures.