1. **State the problem:** A customer gives the circumference of a tire's wheel rim as 44 inches. We need to find the approximate diameter of the tire. 2. **Formula used:** The circumference $C$ of a circle is related to its diameter $d$ by the formula: $$C = \pi d$$ 3. **Rearrange the formula to solve for diameter:** $$d = \frac{C}{\pi}$$ 4. **Substitute the given circumference:** $$d = \frac{44}{\pi}$$ 5. **Calculate the diameter:** Using $\pi \approx 3.1416$, $$d \approx \frac{44}{3.1416} \approx 14.01$$ 6. **Interpretation:** The diameter is approximately 14 inches. **Final answer:** The tire's diameter is approximately **14 in**.