1. The problem asks to find the circumference of a circle with a diameter of 146 cm. 2. The formula for the circumference $C$ of a circle is: $$C = \pi d$$ where $d$ is the diameter. 3. Substitute the given diameter $d = 146$ cm into the formula: $$C = \pi \times 146$$ 4. Using $\pi \approx 3.1416$, calculate: $$C \approx 3.1416 \times 146 = 458.3664$$ 5. Round the answer to 1 decimal place: $$C \approx 458.4 \text{ cm}$$ Therefore, the circumference of the circle is approximately 458.4 cm.