What is the wavelength of a radio wave emitted at 88.0 mhz

The speed of all electromagnetic waves in empty space is 3.00 x 108 m/s. Calculate the wavelengths of electromagnetic waves emitted at the following frequencies: Radio waves at 88.0 MHz (3.41 m) Visible light at 6.0x108 MHz (5.0 x 10-7 m)

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c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

the answer for sodium is 0.186

the answer for rubidium is 0.251