Answer:
f(x)=start fraction 4 over x squared End fraction minus start fraction 2 over x end fraction +1
The correct answer is, obviously, 34/7.
Answer:

Step-by-step explanation:
Cosine is the ratio of the side adjacent to the angle and the right triangle hypotenuse.
B =
= 
67% of 1280 is 857.6 substrack it and it's = 422.4