1. The problem statement, all variables and given/known data Find the volume of the parallelepiped with adjacent edged PQ, PR, and PS. P (-2,1,0) Q (2,3,2) R (1,4,-1) S (3,6,1) 2. Relevant equations Volume = PQ . (PR x PS) 3. The attempt at a solution I first found the vectors PQ, PR and PS. Then I did the cross product of PR x PS and then did the dot product of PQ (dot) PR x PS. I got an answer of 6, but the answers in the back of the book says 16. Did I do it wrong? or is the book wrong?