In order to appear motionless to an observer at a fixed location on earth's surface, the satellite must rotate around earth at the same and both the location and satellite must be in. this can only occur above earth's equator. above any other location, the "ring" of satellite motion and the "ring" of motion of the location on earth's surface be in the same plane. true / false.

The only True is following:

Explanation:

the satellite must rotate around Earth at the same and both the location and satellite must be in. This can only occur above Earth's equator.

i would say b probably

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.