Heee what subscription? ? and costs. i just wanted to beef up the brain in such great need.

that question made no sense

Um If you want to get smarter you could try music. The easiest instrument is the trumpet(Ik from experience) Or maybe the suprano sax. You could try other instruments too. You could join the school band. A cool program/app is "Smart music" its like 40-60$$. Another thing you could try is a new language. "Mango" is a cool app that teaches languages. Its free if u have a library card from a library that does it. I think thats what u meant.

changeable lenses of different focal lengths allow light to enter the camera, which then forms the image on light-sensitive film" is the one among the following statements about working principle behind a basic still camera is true.