ANSWER
0.132
Step-by-step explanation
We want to round up 0.13171 to the nearest thousandths.
To do this, we pick the digit after the digit in the thousandth place value.
If it is greater than or equal to 5, we round up to 1 but if it is less than 5, we round down to 0 and then add to the digit in the thousandth place value.
The digit in the thousandth place value is 1, so the digit we pick is 7.
Since 7 is greater than 5, we round up and add to 1.
Therefore, the answer is:
0.132