Absolute Uncertainty – Relative Uncertainty

390.002 contains six significant figures ⎭ 3. Zeros at the beginning of a number (i.e., on the left-hand side) are considered to be placeholders and are not significant. 0.00078 contains two significant figures ⎫ In these examples, the zeros 0.00205 contains three significant figures ⎬ on the left are placeholders. ................
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