> Are they as high up that it could start orbiting?
1. No
2. Orbit is more about speed than height. You have to get high enough that the atmosphere doesn't aggressively degrade your velocity, but the key is to hit ~8km/s, although that number changes depending on your altitude.
You only need to be moving ~7.5-8km/s, but getting to orbit tends to take 9.5-10km/s of total delta-v due to needing to ascend, aerodynamic drag, and other losses.
Orbiting however is more about radial velocity. You are sort of constantly falling towards Earth, but you are moving so fast that you always miss it and so you end up orbiting it. A great animation on the subject: https://www.reddit.com/r/Damnthatsinteresting/comments/1btbn...
Even for geostationary you still need to gain a ton of horizontal velocity, more than LEO. You are staying over the same spot on the earth, but the earth is rotating and you need to match that same angular velocity. Being at a higher altitude you need a faster linear velocity to match that angular velocity, since you have a larger circle to travel in the same amount of time.
Even if they were high enough they would just fall back to earth. There are lots of videos explaining orbit, this one looks good: https://www.youtube.com/watch?v=bcvnfQlz1x4
1. No
2. Orbit is more about speed than height. You have to get high enough that the atmosphere doesn't aggressively degrade your velocity, but the key is to hit ~8km/s, although that number changes depending on your altitude.
edit: 30km/s -> 8km/s