Answer:
The term significant figures are referring to the number of important digits (0 through 9 inclusive) in the coefficient of some expression in the scientific notation. The number of significant figures in any expression indicate the confidence or precision with which we can state a quantity.
Some rules for significant figures are:
1. All non-zero numbers are significant.
2. Zeros located between non-zero digits are significant.
3. Trailing zeros at the end will be significant only if the number contains a decimal point; otherwise, they are insignificant.
4. Zeros to the left of the first nonzero digit are insignificant.
5. Number in exponents (for example power of 10) is insignificant.
