Answer:
The lunar distance is approximately 400000 km, or a quarter of a million miles. The mean semi-major axis has a value of 384,402 km (238,856 mi). The time-averaged distance between Earth and Moon centers is 385,000.6 km (239,228.3 mi).
Step-by-step explanation:
Lunar distance
English units 238856 mi
Astronomical unit 0.002569 au