Help me with 1, 3, and 5 pleasee show your work

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

How many grams the dog will eat in 3 days?

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g