Concept
To determine the number of significant figures in a number use the following 3 rules:
1. Non-zero digits are always significant.
2. Any zeros between two significant digits are significant.
3. A final zero or trailing zeros in the decimal portion ONLY are significant.
For the given question we have the number: 18.03
There are 4 significant figures
Hence, the number 18.03 does not have 3 significant figures
Answer: False
