How many significant digits (SD)are in the number 101.3 ? square

## Step 1<br />Significant digits (or significant figures) are the digits in a number that carry some meaning regarding its precision. This includes all certain digits, plus any final uncertain (estimated) digit.<br /><br />## Step 2<br />In the given number 101.3, all the digits are significant. This is because there is no placeholder zero in the number.<br /><br />## Step 3<br />The number 101.3 has four digits: 1, 0, 1, and 3. All of these digits are significant.