Please help me with thiss

I'm so close to finishing all these.

Atoy company is considering a cube or sphere-shaped container for packaging a new product. the height of the cube would equal the diameter of the sphere . compare the volume to surface area ratios of the containers. which packaging will be more efficient? for a sphere, sa =4πr²

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.