Please answer these questions

The volume of a cylinder is 72 tt cm3. if the radius is 3 cm, what is the height of the cylinder?

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.

What does the first stage of a multistage rocket do?