F and E are congruent with the figure above
Answer:
A and E
Step-by-step explanation:
(5n^-3)^4= A (25n^-6)^2=E
Answer:
81 ............................
Given :
Two vectors :

To Find :
The value of b for which the vectors are orthogonal .
Solution :
We know , two vectors are orthogonal when the are perpendicular to each other .
So , their dot product will be zero .
So ,

Therefore , for b =0 and
the vectors are orthogonal .
Hence , this is the required solution .