It is more profitable to launch a satellite from west to east, because in this case, the speed of rotation of the Earth is added to the speed of the satellite. It is also more profitable to launch a satellite from the equator, because at the equator the distance from the satellite to the earth’s axis of rotation is higher and higher than the peripheral speed.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.