Question

Choose the number of significant figures indicated. 0.078

Answer 1

Answer : The number of significant figures are, two

Explanation :

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

Rules for significant figures:

1. Digits from 1 to 9 are always significant.
2. All non-zero numbers are always significant. For example: 654, 6.54 and 65.4 all have three significant figures.
3. All zero’s between integers are always significant. For example: 5005, 5.005 and 50.05 all have four significant figures.
4. All zero’s preceding the first integers are never significant. For example: 0.0078 has two significant figures.
5. All zero’s after the decimal point are always significant. For example: 4.500, 45.00 and 450.0 all have four significant figures.

The give number is, 0.078

By using rule 4, we get the number of significant figures which are '7' and '8' that means the number of significant figures are, 2

Hence, the number of significant figures are, two

Answer 2

2 significant figures