If X is the center point of a face of a cube with a volume of 8, and Y is the center
point of the opposite face of this cube,
what is the distance from X to Y?
(A) V2
(B) 2
(C) 2V2
(D) 4
(E) 6

How do refracting telescopes magnify a far away image? a. by directing light beams to meet at a focal point b. by absorbing light beams’ wavelengths c. by forcing light beams to change direction d. by measuring light beams’ velocity