What was most likely the cause for the change between 1990 and 2013 in the East Asia and Pacific region? North Korea built new high-polluting, coal-fueled power plants.

China experienced rapid industrial and urban population growth.

Japan reduced government regulation of industrial environmental practices.

Mongolia increased global commercial exports after joining the World Trade Organization.

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

explanation:

wow this is going to be a long one

cats shouldn't be kept inside their whole life they should be out in nature in the fresh air but because of our technology advances it has become unsafe for our furry friend to be outside in the city's, because they could be hit by vehicles. in city's yes i agree being inside isn't the worse thing, but if you live somewhere rural you should let your cats outside, yes some animals hunt cats but i don't think cats should be kept inside confined to such a small space.

btw this is my opinion