The planet Pern, home of the dragon riders, is know to have a volume of 6.08 x 10^25 cm3 .Assuming this is true, what is Pern's radius?
Sphere volume = 4/3 pi r^3
6.08 x 10^25 = 4/3 pi r^3
cubrt (6.08 x 10^25 * 3/4 / pi) = r = 2.439 x 108 cm
+36916 
