Answer:
6.598
Explanation:
=> 6.5982
While rounding to 3 dps, we look at the digit in ten thousandths place. If it is greater than 5, we'll add 1 in the thousandths place but if it is smaller than 5, we won't add anything.
=> Here, the digit in ten thousandths place is less than 5. So, after rounding off to 3 dps the number becomes
=> 6.598