Question

How many zeroes ar significant in 0.0040500?

Answer 1

5 zeroes are significant.

According to the rules of significant nunbers,

1. All non zero digits are significant

2. Zeros between two non zero digits are significant.

3. The zeroes preeceding to the first non zero number are not significant.

4. All zeroes placed at the end or to the right of a number are significant provided they are on the right side of the decimal point