Which law mandates the restoration of mined land back to the way it was prior to mining activities? A) US Mining Recovery Act of 1992 B) West Virginia Land Mine Restoration Law of 2004 C) The Surface Mining Control and Reclamation Act of 1977 D) No federal law addresses mining restoration. E) Each state designs its own law to govern mining operations and restoration.

from the word list given, the most suitable words that relate to the reason information were written would be:  

objectivity: lack of bias, judgment, or prejudice

accuracy: free of mistakes, to be correct

authority: the ability to tell people what to do or believe in

content: to be satisfied  

it can be said that the author made the article to present objectivity, to provide accurate information, to be the authority in the subject that he or she writes, and to be satisfied of the information quality given out.

to answer your question:

f(x)= a^x.  if x=0, f(x)=1  if x=1, f(x)=a  if x=1, f(x)=a^a

answer is d. graphite coatings.

some connecting rods have _graphite coatings_ to lubricate the cylinder wall or piston pin.