Most of the examples in your text probably dealt with satellites in low Earth orbit (LEO). The gravitational acceleration in LEO is about 90% of that on the Earth's surface. You need to go much higher to achieve more than a 50% reduction (4.5/9.807=0.459) in the gravitational acceleration.thank you very much for your service. i wasnt confident in my answers because the distance seem rediculous from answer that i saw in the examples of my course book. but once again thank you for your expertise.