An electromagnetic radio wave is received by a transmitter before it is converted to a sound wave. The radio wave has a wavelength of 23,076 m and a frequency of 13,000 Hz. What velocity is the wave traveling at before the transmitter converts it to a sound wave?

Use the wave equation velocity = frequency × wavelength. Multiplying 13,000 Hz by 23,076 m gives 299,988,000 m/s, which is approximately 3.00 × 10⁸ m/s. Therefore, the wave is traveling at 3.00 × 10⁸ m/s, choice D.

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