How many significant figures are in the number 0.007890?

₹0.0

Question: How many significant figures are in the number 0.007890?

Options:

Correct Answer: 5

Solution:

The significant figures are 7, 8, 9, and the trailing zero counts.

How many significant figures are in the number 0.007890?

How many significant figures are in the number 0.007890?

Step 1: Identify the non-zero digits in the number 0.007890. These are 7, 8, and 9.
Step 2: Count the non-zero digits. There are 3 non-zero digits: 7, 8, and 9.
Step 3: Look at the zeros in front of the number (0.007890). These leading zeros do not count as significant figures.
Step 4: Check for any trailing zeros after the last non-zero digit (which is 0 in this case). The trailing zero counts as a significant figure.
Step 5: Add the non-zero digits and the trailing zero together. This gives us 3 (from 7, 8, and 9) + 1 (from the trailing zero) = 4 significant figures.

Significant Figures – Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.