Why doesn't the Boeing 747 have GE90 engines?

In simplest terms it's because air density decreases with increasing altitude resulting in less drag.

Appears that the "thumbs down" jerk got a severe case of diarrhea again. Yahoo should show who gives thumbs UP and DN for each answer. These stupidities would soon be stopped.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.