Problem
8. Find the circumference of the circle. for \( \pi \). Round to the nearest hundredth.
Solution
Step 1 ：1. Recognize the formula for the circumference of a circle: \( C = 2\pi r \).
Step 2 ：2. Identify that \( r \) is missing.
Step 3 ：3. Calculate \( C \) when given \( r \) and round to the nearest hundredth.
