Great approach! Always look for the possibility of picking numbers in a problem like this,

It looks as though the problem is missing a word. "the area about 4 miles of Midway Island" seems to need a compass point - e.g. 4 miles "west" of Midway. That is particularly likely since the answer includes a compass point.

E is a 180. The stimulus tells us that reproduction rates vary according to population density. That means density must vary,

We have no information about human encroachment on wolf territory. Therefore, although it may be true, it is not a valid inference. Given our lack of information, it is equally possible that humans have backed off and created more territory for the wolves.

The conclusion is that licensing these knives will not risk the magazine's revenues. There are two sources of revenue to consider, subscriptions and advertising. D relates to the revenue of the cookware manufacturer, not the magazine. The only one that relates to either advertising revenues or subsc...

Get your lowest common denominator = 3*4*43

then (7*4)/(3*4*43) = (5*3)/(3*4*43) = 28/(3*4*43) + 15/(3*4*43) = 43/(*3*4*43) = 1/12

I agree. It's a good idea when typing to be overly specific.

I think the problem is reading the question. My understanding is that the original equation is:
(b^a)+1 - b(a^b) and I think you are reading it as b^(a+1) - b(a^b). Typing algebra can be prolbematic.