The correct answer is: $12.22\text{°C}$
Explanation
Convert Fahrenheit to Celsius using the formula $C=\dfrac{5}{9}(F-32)$. For $F=54$, subtract 32, multiply by $5/9$, and round to two decimal places.
Steps:
- Formula: $$C=\frac{5}{9}(F-32)$$
- Substitute: $$C=\frac{5}{9}(54-32)=\frac{5}{9}\times22$$
- Compute: $$C=\frac{110}{9}\approx12.222\text{°C}\approx12.22\text{°C}$$
Therefore, $54\text{°F}\approx12.22\text{°C}$.