Just do 3^2 * 3^2 he is incorrect because he multiplied the exponents and he was suppose to add them together. the correct answer should be 3 to the 4th power which is 81
Answer:
C.
Step-by-step explanation:
Move to the right 2 units,
Move down 2 units.
Unit vector along the direction v = <3,1,-4> is :

So, unit vector opposing the
is :

so, vector of magnitude 3 units in opposite direction from v is :

Hence, this is the required solution.