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What is the semi-major axis of an elliptical orbit with perigee and apogee distances of 2500 km and 8000 km respectively?

What is the semi-major axis of an elliptical orbit with perigee and apogee distances of 2500 km and 8000 km respectively? Correct Answer 5250 km

Semi-major axis of an ellipse is half of the major axis. Major axis can be represented as a sum of perigee and apogee distances. Therefore, Semi-major axis = (2500 + 8000) / 2 = 5,250 km

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