2 Write 57.3997 correct to 4 significant figures.

To round 57.3997 to four significant figures, you first identify the first four digits that contribute to its value, which are 5, 7, 3, and 9. The next digit is 9, which means you need to round up the last identified significant figure. Therefore, 57.3997 rounded to four significant figures is 57.40. Rounding can sometimes be tricky! A common mistake is forgetting to look at the digit immediately after your last significant figure. Always remember that if this digit is 5 or greater, you round up the last significant figure, and if it’s less than 5, you keep it as is. This will help you achieve accurate rounding every time!