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Example: 100.0 has 4 sig figs 100 only has 1 sig fig. _____ in the beginning of a number that only serve as a placeholder are NOT significant. Ex. 0.0025 only has 2 sig figs _____ following a decimal significant figure are significant. Ex. 0.00470 has 3 sig figs (Use the rules if you would like, but I like the Atlantic-Pacific Method better ... ................
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