The same principle apply to stereo microscopes, a 10X eye piece combined with a 4X objective lens will produce 40X magnification.
D.The term "set point<span>" is used to describe the </span>weight<span> at which your body likes to be and you stay there with little effort. Maybe you've lost 15 or 20 pounds in the past, only to gain it all back after a few months</span>
Im pretty sure its 20,000-25,000