Am radio signals have frequencies between 550 khz and 1600 khz (kilohertz) and travel with a speed of 3.00 ✕ 108 m/s. what are the wavelengths of these signals?

The minimum frequency is 

while the maximum frequency is

Using the relationship between frequency f of a wave, wavelength  and the speed of the wave v, we can find what wavelength these frequencies correspond to:



So, the wavelengths of the radio waves of the problem are within the range 188-545 m.