The base of a rectangular box measures 4 feet by 3 feet. if the volume is 36 cubic feet then the height is

The height is 3 ft.

Since the area (12 ft²) and volume (36 ft³) are already given, we only need to divide the volume by the area to get the height.
    ⇒ 36 ft³ / 12 ft² = 3 ft

If you divide 0.1 and 0.6 you wii get 0.166666 which rounds to .167 which is answer b