Question

how many significant figures in the following number? 1.0080
1
2
4
5

Explanation:

Step1: Recall significant figure rules

Significant figures rules: Non - zero digits are significant. Zeros between non - zero digits are significant. Trailing zeros in a decimal number are significant.

Step2: Analyze the number 1.0090

• The digit 1 is a non - zero digit, so it is significant.
• The two zeros between 1 and 9 are zeros between non - zero digits, so they are significant.
• The digit 9 is a non - zero digit, so it is significant.
• The trailing zero after 9 is a trailing zero in a decimal number, so it is significant.

Counting these significant figures: 1, 0, 0, 9, 0. So there are 5 significant figures.

Answer:

5