The correct answer is: $129.2^\circ\text{F}$
Explanation
Use the Celsius-to-Fahrenheit conversion formula $F = C\times\frac{9}{5}+32$. For $C=54^\circ\text{C}$ substitute and compute.
Steps:
- Formula: $$F = C\times\frac{9}{5}+32$$
- Substitute: $$F = 54\times\frac{9}{5}+32$$
- Calculate: $$F = 54\times1.8+32 = 97.2+32 = 129.2$$
Therefore, $54^\circ\text{C} = 129.2^\circ\text{F}$.