Two cube-shaped boxes are stacked one above the other. the volume of one box is 512 cubic meters, and the volume of the other box is 216 cubic meters. the total height of the stacked boxes is meters.

The ancestors of horses possessed feet with five digits. over time, with the development of grasslands, the digits fused and formed hooves. what evolutionary advantage did this transformation serve? a. it allowed them to climb rocky surfaces with ease. b. it allowed them to graze better. c. it enabled them to run faster from predators. d. it let them see clearly through the grasslands. e. it made them taller.