Chapter 12 - Vectors and the Geometry of Space - 12.4 The Cross Product - 12.4 Exercises - Page 861: 15

$96 \sqrt 3$; into the page

$|u \times v|=|u||v|sin \theta$ $=(12) (16) sin 60^ \circ$ $=192 (\frac{\sqrt 3}{ 2})$ $=96 \sqrt 3$ If we are using a right handed coordinate system then according to this rule vector $ u \times v$ is pointing into the page.