Question

calculate the proper no. of significant figure in20.0021​

Answer 1

Answer:

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Explanation:

Answer 2

Answer:

The following sig fig rules are used:

Addition (+) and subtraction (-) round by the least number of decimals.

Multiplication (* or ×) and division (/ or ÷) round by the least number of significant figures.

Logarithm (log, ln) uses the input's number of significant figures as the result's number of decimals.

Antilogarithm (n^x.y) uses the power's number of decimals (mantissa) as the result's number of significant figures.

Exponentiation (n^x) only rounds by the significant figures in the base.

To count trailing zeros, add a decimal point at the end (e.g. 1000.) or use scientific notation (e.g. 1.000 × 10^3 or 1.000e3).

Zeros have all their digits counted as significant (e.g. 0 = 1, 0.00 = 3).

Rounds when appropriate, after parentheses, and on the final

Explanation:

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