Question

which measured number shows 4 significant digits? zeros at the end of integers are not significant - unless there is a bar or a decimal point. 1010 101.0 10100 0.100

Explanation:

Step1: Recall significant - digit rules

Non - zero digits are always significant. Zeros between non - zero digits are significant. Trailing zeros in a number with a decimal point are significant.

Step2: Analyze 1010

The zeros between 1s are significant, but the trailing zero without a decimal point is not significant. It has 3 significant digits.

Step3: Analyze 101.0

The non - zero digits 1 and 1 are significant. The zero between them is significant, and the trailing zero after the decimal point is significant. It has 4 significant digits.

Step4: Analyze 10100

The zeros between 1s are significant, but the two trailing zeros without a decimal point are not significant. It has 3 significant digits.

Step5: Analyze 0.100

The non - zero digit 1 is significant. The zeros after the 1 and after the decimal point are significant. It has 3 significant digits.

Answer:

101.0