Evaculate 7/13×8/11. Will be marked brainliest

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

1. are the triangles similar and if so why? what is the value of x? show your work.

What is the value of x? enter your answer in the box. photo attached.