Cost Advantage. Collective trusts can operate with lower compliance costs than mutual funds for two reasons. First, because the institution is offering the investment to a large number of employees, they can negotiate a lower cost due to the higher supply of money they are providing.
You can absolutely see the earth's curvature if you're at altitude, particularly over the ocean in a plane. At sea level, you can only see about 3 miles. The average angle of human vision is somewhere between 120Âº and 140Âº; more if you count the whole image your brain builds up as your eyes move. The curvature of the horizon can be found with:
For a sphere, those two lines are parallel, which means they can never meet at your eye and you can never see both edges of a sphere at the same time. The Earth is almost a perfect sphere. So, neglecting distortion due to Earth's atmosphere, the strict answer to your question is: you must be an infinite distance away. Certainly, you've got to go farther than the International Space Station (240 miles), where you can only see about 5% of the full hemisphere Earth.