Easy Question- cant seem to get it

[spacemanrussell]

Homework Statement

What is the magnetic field amplitude of an electromagnetic wave whose electric field amplitude is 100V/m?

Homework Equations

Eo=Bo*c

The Attempt at a Solution

100/(3*10^8) = .0000003

Mastering physics says this is wrong though ^^

 

[cristo]

Homework Statement

What is the magnetic field amplitude of an electromagnetic wave whose electric field amplitude is 100V/m?

Homework Equations

Eo=Bo*c

The Attempt at a Solution

100/(3*10^8)

That looks fine to me. Now express this as a decimal.