How is Darzee's wife similar to Nagaina in "Rikki-Tikki-Tavi"?

Darzee and Nagaina are similar in the fact that they both recognize a threat to their family, and they are prepared to kill innocents to keep their family safe.  
Nagaina is afraid of Rikk-tikki. She knows he is a natural predator to snakes. She knows her eggs are in danger as long as Rikki-tikki is around, so she comes up with a plan to get rid of Rikki-tikki. She and Nag will kill the humans. She knows that once the humans are gone from the house, Rikki-tikki is not likely to stay there.  

"But are you sure that there is anything to be gained by killing the people?" said Nag.
"Everything. When there were no people in the bungalow, did we have any mongoose in the garden? So long as the bungalow is empty, we are king and queen of the garden."

Darzee's wife has the exact same attitude. She knows cobras are a threat to her and her eggs. She also knows a bunch of baby cobras is even more dangerous. That's why she has no problem with distracting Nagaina. While Darzee's wife fakes having a broken wing, Rikki-tikki is able to sneak over to Nagaina's nest and destroy most of the eggs. Darzee's wife has no problem with helping kill a bunch of baby snakes because it will protect her family.

Outline criticisms of Von Thunen's Theory of Economic Rent.

Von Thunen was a German geographer who devised a model to explain the location of various forms of land use. In particular, his model was devised after observing land use around cities in Germany in 1826.
 
His theory of Economic Rent stated that use of land would be decided by the interplay between transport costs (price of getting goods to market) and the economic rent (money that land is worth) that the land commands.
 
The closer to the central place, the more expensive the economic Rent, but the cheaper the transport costs. In this case the farmer would use the land in a very intensive manner to make as much profit as possible. If the farmer were to buy land with cheaper economic rent further from the city, then using it for market gardening would be cost inhibitive. Not only would this land require many costly inputs such as labour and fertiliser, it would also have high transport costs as market garden produce needs to be at the market regularly to sell.
 
The furthest land from the city would be much cheaper with a low Economic Rent because of its distance from the market. The transport costs, however, would be high also. In this particular situation an extensive land use such as livestock would be the best as it only needs a few visits to the market.
 
Although the model makes sense and is useful in deducing generalised land use patterns, it has been criticised for the assumptions it is based on.  
 
Firstly, Von Thunen based his model on pre industrial Germany – where roads, trains and heavy and light industry did not exist. This type of cultural landscape hasn’t existed in many developed nations for centuries thus reducing its usefulness in a modern context
 
It assumes that an area has only one major central place in a uniform physical environment (flat, uniform soil and climate as well as no rivers or mountains) The variety of physical environments that exist in actuality have a huge influence on location of land use. Added to this assumption is that the central place is isolated from other areas due to wilderness. This assumption therefore doesn’t take into account the reliance on trade that exists in most modern countries.
 
The model does not suggest how changing technology would influence the model. It is based on horse and cart technology of 1820’s Germany.
 
There are many criticisms of Von Thunen’s Theory of Economic Rent (Land Use Location) . Despite this, the nature of a model is that of a starting point and not an answer. By adding one change at a time a Geographer can still use this model to explain theories of how land is used.

In "Young Goodman Brown," what is significant about the names of the title character and his wife?

The emphasis of Young Goodman Brown's name should be on the Goodman part of it. He is a "good man." He is a man that has faith. The story shows readers this in a very concrete way. Young Goodman Brown is married to a woman named Faith. As the story progresses, Brown meets the Devil and he begins to have his faith in God and in his community shaken. The Devil shows him that people Brown once thought of as deep men and women of faith are actually followers of Satan. The good man of faith that is Brown determines that he will not be shaken because he has strong faith. His Faith (wife) will never be turned; however, the Devil then plays his trump card and shows that Faith is one of his too. Brown has lost his Faith to the Devil. Consequently, because Brown lost Faith, he also loses his faith in everything else.

"My Faith is gone!"

What weapons were absent from WWI that would be present in later conflicts?

In the naval sphere battleships were the weapon of choice in World War One, but they were made obsolete by the introduction of aircraft carriers, which were an essential part of the American war effort in the Pacific. Sonar was another invention that helped the Allies defeat Axis submarine warfare.
Along with new and better aircraft, World War Two saw the first use of guided missiles like the V-2 rocket, which was a precursor to the ICBMs and cruise missiles of today.
Another important weapon not yet in existence in World War One was bacteriological warfare. During the Cold War both the U.S. and the Soviet Union amassed stocks of anthrax and other microorganisms that were to be used in the event of a global conflict. Unlike most other new weapons, however, they have not yet been openly used.

WWI is unique in that industrial processes were used to make new weapons.  Poison gases that were otherwise byproducts of industry were used on the Western Front as were belt-fed machine guns, tanks, and barbed wire.  
For the sake of your question, I will compare WWI with WWII to give you an idea of how weaponry changed.  First, there was no such thing as the personal machine gun in WWI--machine guns often had a team of at least three people--someone to aim and fire, someone to keep the barrel cool with a bucket of water, and someone to ensure that the belt of ammunition fed in smoothly.  The average WWI infantryman carried a bolt-action Mauser, Enfield, or Springfield rifle, depending on which side he represented.  In WWII, men could carry their own automatic weapons--the Soviet Union carried weapons that were similar to the AK-47.  WWI flyers also had very primitive planes that did not have aluminum frames--in WWII, aluminum would be a key airplane component.  WWII naval craft also used sonar--in WWI, this technology did not exist yet.  Of course, atomic weapons and jets did not exist in 1918 either.  

Intermediate Algebra, Chapter 3, Summary Exercises, Section Summary Exercises, Problem 18

Determine which of the following best describes the given equation below. Write your answer in the blank provided.


$
\begin{equation}
\begin{aligned}

\underline{B } \text{ a) } & \text{Slope } -0.5, b = -2
&& \text{A. } y = - \frac{1}{2}x
\\
\\
\underline{D } \text{ b) } & \text{$x$-intercept } (4,0), \text{ $y$-intercept } (0,2)
&& \text{B. } y = - \frac{1}{2}x - 2
\\
\\
\underline{A} \text{ c) } & \text{Passes through } (4,-2) \text{ and } (0,0)
&& \text{C. } x - 2y = 2
\\
\\
\underline{C } \text{ d) } & m = \frac{1}{2}, \text{ passes through } (-2,-2)
&& \text{D. } x + 2y = 4
\\
\\
\underline{E } \text{ e) } & m = \frac{1}{2}, \text{ passes through the origin}
&& \text{E. } x = 2y


\end{aligned}
\end{equation}
$

College Algebra, Exercise P, Exercise P.4, Section Exercise P.4, Problem 52

Simplify the expression $\displaystyle \left( 2a^3 b^2 \right)^2 \left( 5a^2b^5 \right)^3$ and eliminate any negative exponents.

$
\begin{equation}
\begin{aligned}
\left( 2a^3 b^2 \right)^2 \left( 5a^2b^5 \right)^3 &= \left[ 2^2(a^3)^2(b^2)^2 \right] \left[ 5^3(a^2)^3(b^5)^3 \right] && \text{Law: } (ab)^n = a^n b^n\\
\\
&= \left( 4a^6 b^4 \right) \left(125a^6 b^{15} \right) && \text{Law: } (a^m)^n = a^{mn}\\
\\
&= (4)(125)a^6 a^6 b^4 b^{15} && \text{Group factors with same base}\\
\\
&= 500 a^{6+6} b^{4+15} && \text{Law: } a^m a^n = a^{m+n}\\
\\
&= 500 a^{12} b^{19}
\end{aligned}
\end{equation}
$

What problems did Timothy and Phillip have in The Cay?

Most of the book is focused on the problems that Timothy and Phillip experience. The two characters find themselves marooned on a small cay after their ship is hit by torpedoes. Their chance at a quick rescue is squashed, because their small cay is a remote part of the area called the Devil's Mouth. It is outside of standard shipping lanes, so there isn't any chance at being spotted by a passing ship. In general, the main problems for Phillip and Timothy are finding food, water, and shelter. The cay has food and fresh water, but it doesn't have them in large amounts. As for shelter, the two have to make do with what they have. Fortunately, Timothy is a very knowledgeable man when it comes to building what they need and teaching Phillip how to scavenge for food. Then of course, there is the weather to contend with. At one point, the island is hit by a hurricane, and Phillip only survives because Timothy physically shields the boy from the storm's worst furies. Phillip has never really had to work all that hard in his life, so his new life focused on survival is quite a world changer. Their entire situation is made more difficult by the fact that Phillip is now blind. He not only has to learn new skills, but he also can't even depend on his eyes to help him learn those new skills or even accomplish the things he does know how to do. Finally, the relationship between the two characters is not without struggles. Phillip is quite the prejudiced kid at the beginning of the story, and he and Phillip struggle to be around each other. It's again thanks to Timothy's patience and perseverance that the relationship improves, and the two characters become good friends.