What (rather remarkable!) equation relates the speed of light to other fundamental electromagnetic constants?

Complete Question

The complete question is shown on the first uploaded image

The equation is  

The value of  c is

Explanation:

From the question we are told that

   Generally the equation that  relates the speed of light to other fundamental electromagnetic constants is

Here  c is the speed of light

is the permeability of free space with value

and   is the permittivity of free space  with value  

So

=>  

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

c) up

hope this