Final answer:
To round 30.0231 to the nearest thousandth, the digit in the ten-thousandth place ('1') is examined; since it is less than 5, the number remains 30.023 after rounding.
Step-by-step explanation:
The question involves rounding the number 30.0231 to the nearest thousandth.
, we need to look at the digit in the thousandths place, which is 3. Since the digit to the right of 3 is less than 5, which is 1 in this case, we keep the 3 as it is. Therefore, 30.0231 rounded to the nearest thousandth is 30.023.
To round to the thousandth place, you look at the digit in the ten-thousandth place to decide whether to round up or stay the same. In the number 30.0231, the ten-thousandth place is represented by '1'. Since '1' is less than 5, you do not round up.