Respuesta :
The correct answer for this problem would have to be D hope this helps:)
Answer: The correct option is (d) 60.
Step-by-step explanation: We are given to find u * v, if the vectors u and v are defined as follows :
[tex]u=12j,~~~v=i+5j.[/tex]
We know that
[tex]i.i=1,~~j.j=1,~~k.k=1,~~i.j=j.i=j.k=k.j=i.k=k.i=0.[/tex]
So, we have
[tex]u*v\\\\=(12j)*(i+5j)\\\\=12j.i+12j.5j\\\\=12\times 0+60\times 1\\\\=0+60\\\\=60.[/tex]
Thus, the value of u * v is 60.
Option (d) is CORRECT.
