A length 5.997 m rounded off to three significant figures is written as

Options

A. 6.00 m
B. 5.99 m
C. 5.95 m
D. 5.90 m

Answer

To round off the length 5.997 m to three significant figures, we follow these steps:

1. **Identify the First Three Significant Figures**:
The number 5.997 has the digits 5, 9, and 9 as its first three significant figures.

2. **Look at the Next Digit**:
The next digit after the first three significant figures (5.99) is 7.

3. **Determine How to Round**:
According to rounding rules, if the digit following the last significant figure (which is 9 in this case) is 5 or greater, we round up the last significant figure. Since the next digit (7) is greater than 5, we will round up.

4. **Round the Last Significant Figure**:
Rounding up the last significant figure (9) means we add 1 to it. Therefore, 9 becomes 10.

5. **Adjust the Number**:
When we add 1 to 9, we get 10, which means we need to carry over. So, the 5 becomes 6, and we drop the other digits (since we are rounding to three significant figures).

6. **Final Result**:
Therefore, 5.997 m rounded to three significant figures is 6.00 m.

### Summary:
The length 5.997 m rounded off to three significant figures is written as **6.00 m**.

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