9000108806

SubArea: 
Points and vectors
Level: 
B
Project ID: 
9000108806
Accepted: 
1
Clonable: 
1
Easy: 
0
Find the coordinate $y$ which ensures that the vectors \(\vec{u} = (-6;y;3)\) and \(\vec{v} = (12;4;4)\) are perpendicular.
\(15\)
\(12\)
\(\sqrt{5}\)
\(\frac{5} {3}\)