Final answer:
The conversion with the correct number of significant figures is option a. 24.95 min × 1 h/60 min = 0.4158 h.
Step-by-step explanation:
The correct number of significant figures is determined by the conversion factor with the least number of significant figures. Let's analyze each option:
a. 24.95 min × 1 h/60 min = 0.4158 h - This has 4 significant figures since 24.95 has 4 significant figures.
b. 12.0 ft × 12 in/1 ft × 2.54 cm/1 in = 370 cm - This has 3 significant figures since 12.0 only has 3 significant figures.
c. 24.0 kg × 1 lb/2.205 kg = 11 lb - This has 2 significant figures since 24.0 only has 3 significant figures.
d. 2 L × 1.057 qt/1 L = 2.12 qt - This has 3 significant figures since 2 L only has 1 significant figure.
e. 2.543 m × 39.37 in/1 m = 100.1944 in - This has 7 significant figures since 2.543 has 4 significant figures.
Therefore, the conversion with the correct number of significant figures is option a. 24.95 min × 1 h/60 min = 0.4158 h.