If the electromagnetic radiation used to send television signals have a frequency of 3.0 * 10^9 Hz, what is its wavelength?

Question

I forget how to do a problem like this. Just taking a guess, is this somewhat a conversion equation?

Answer 1

c = freq x wavelength.
c = 3E8 m/s
freq is given.
Solve fopr wavelength.

Answer 2

Just trying to understand this, but is C always the basic number when doing problems like this?

Answer 3

Always the answer would be .1, right?

Answer 4

Also*