Abcd is a kite

Find AB (leave square root)
Find CD (leave square root)

Which order pair could be removed so that the set of order pairs is a function

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c

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