A wave with a height of 10 feet and wavelength of 20 feet has a wave base of

10 ft
The wave base of a wave is the depth at which there is no more perturbation of the medium caused by the wave. The wave base of a wave is determined to be half the wavelength of the wave itself.
Therefore;
Wave base = wavelength/2
= 20 ft/2
= 10 ft
Answer:
10 feet
Explanation: I got it right on the test (Apex)