Carly Britney and Lauren streamed 1/4 of an 8 episode documentary. If 70 minutes of the documentary have been watched. How many minutes are in the documentary?
If Carly, Britney, and Lauren streamed 1/4 of the documentary, they watched 1/4 * 8 episodes = <<1/4*8=2>>2 episodes.
Two episodes of the documentary are equivalent to 2 * 70 = <<2*70=140>>140 minutes.
The documentary consists of 140 minutes/0.25 = <<140/0.25=560>>560 minutes. Answer: \boxed{560}.