posted by Mary .
What is the wavelength in meters of radio waves produced by a radio station with a frequency of 1400 kHz?
Is it 214.3 m?
c/f = 2.998*10^8/1400*10^3 = 214.1 m
If you are going for 4 significant figures, you need to use a more exact speed of light. You must have used 3*10^8 m/s
Your answer is close enough