Question

the following number has how many significant figures 0.0955 s?

Explanation:

Step1: Recall sig fig rules for decimals

Leading zeros (before non - zero digits) are not significant. Non - zero digits and zeros between non - zero digits are significant.
For 0.0955, the leading zeros (the two zeros before 9) are not significant. The digits 9, 5, and 5 are non - zero and significant.

Step2: Count significant figures

Count the significant digits: 9, 5, 5. So there are 3 significant figures.

Answer:

3