The correct answer is: $54.4310844\text{ kg}$ (approximately $54.43\text{ kg}$).
Explanation
Convert pounds to kilograms using the exact conversion factor $1\text{ lb} = 0.45359237\text{ kg}$. Multiply 120 pounds by that factor to get kilograms.
Steps:
- First step: $$1\text{ lb} = 0.45359237\text{ kg}$$
- Second step: $$120\text{ lb} \times 0.45359237\frac{\text{kg}}{\text{lb}} = 54.4310844\text{ kg}$$
- Final step: Round as needed. Rounded to two decimal places: $$54.43\text{ kg}$$ (to one decimal place: $54.4\text{ kg}$).
Therefore, $120\text{ lb} \approx 54.43\text{ kg}$.