Question

1. which of the following digits are not considered significant?

○ zeros between non-zero digits
○ zeros to the left of non-zero digits
○ trailing zeros in a decimal
○ all non-zero digits

Explanation:

To determine non - significant digits, we recall the rules of significant figures:

1. Zeros between non - zero digits (e.g., in 105, the 0 is significant) are significant.
2. Zeros to the left of non - zero digits (e.g., in 0.012, the leading zeros) are not significant as they only serve to locate the decimal point.
3. Trailing zeros in a decimal (e.g., in 1.20, the trailing 0) are significant.
4. All non - zero digits (e.g., 1, 2, 3) are significant.

Answer:

B. zeros to the left of non - zero digits