If the radius of a circle is 3.5 cm, what is the diameter?

What are the domain and range of f(x)=[1/5]x

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

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.