Volume 2 : 3 ratio of the volumes of the sphere and cylinder is credited to Archimedes. The volume of a sphere is the integral of an infinite number of infinitesimally small circular disks of thickness "dx". The calculation for the volume of a sphere with center 0 and radius "r" is as follows. The surface area of the circular disk is formula_10. The radius of the circular disks, defined such that the x-axis cuts perpendicularly through them, is or where y or z can be taken to represent the radius of a disk at a particular x value. Using y
4-D (The X-Files) 5.1% of the nation's estimated households and was viewed by 5.38 million households. "4-D" was the 62nd most watched episode of television that aired during the week ending December 9. The episode was later broadcast in the United Kingdom on BBC One in November 25, 2002. "4-D" received mixed to positive reviews from critics. Robert Shearman and Lars Pearson, in their book "Wanting to Believe: A Critical Guide to The X-Files, Millennium & The Lone Gunmen", rated the episode four stars out of five. The two noted that, while the episode's premise "doesn't seem as well thought through" as Maeda's