Final answer:
To round 3π to the nearest thousandth, we need to look at the digit in the thousandths place (the third decimal place). Since the digit in the thousandths place is 0, we round down. Therefore, 3π rounded to the nearest thousandth is 9.425.
Step-by-step explanation:
To round 3π to the nearest thousandth, we need to look at the digit in the thousandths place (the third decimal place). Since the digit in the thousandths place is 0, we round down. Therefore, 3π rounded to the nearest thousandth is 9.425.