How many significant figures are in the number 0.00456?

How many significant figures are in the number 0.00456?

Correct Answer: 3

Step 1: Identify the number you are analyzing, which is 0.00456.
Step 2: Look for leading zeros. Leading zeros are the zeros before the first non-zero digit. In 0.00456, the leading zeros are the two zeros before the 4.
Step 3: Understand that leading zeros do not count as significant figures. So, we will not count the leading zeros.
Step 4: Identify the non-zero digits in the number. The non-zero digits in 0.00456 are 4, 5, and 6.
Step 5: Count the non-zero digits. There are three non-zero digits: 4, 5, and 6.
Step 6: Conclude that the total number of significant figures in 0.00456 is 3.

Significant Figures – Understanding how to identify significant figures in a number, including the treatment of leading zeros.