Rules For Significant Figures

Zeros between non-zero digits are significant. Ex: 3004 has 4 significant figs. Zeros to the left of the first non-zero digit are not significant. Ex: 0.004 has 1 significant fig. If a number ends in zeros to the right of the decimal point, those zeros are significant. Ex: The number 40.0 has 3 significant figures ................
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