What are three symbols used in Shakespeares' "Sonnet 130"?

The symbols Shakespeare uses in this poem serve to enhance the imagery he creates in describing everything his lady is not.  For example, he uses snow as a symbolic standard of a pure, pristine complexion, and his love, whose skin tone is "dun", does not measure up.  In a similar manner, Shakespeare uses the sun, roses, and music as symbolic ideals of the radiant eyes, rosy cheeks, and melodious voice that he would expect to find in a classic beauty, and again, his lady is lacking in these areas.  Shakespeare uses these symbols to create an image of the traditionally accepted measures of comeliness.  In a tone that is playful, tongue-in-cheek, and self-effacing in a way, he makes a comment on the importance of these measures, or perhaps on the foolishness of his own judgement.  Although his love is not a beauty, he loves her still.

In chapter 16, how does Holden feel about actors?

Holden believes actors are phony. He says actors try to be real, but end up just sounding like actors, not like real people. His hatred for actors and the movie first begins when he berates his brother,D.B., to selling out his talent and writing for the movies. Holden says the theater is also phony because instead of showing people the truth, it puts the emphasis on theatricality. He insists he never saw so many phony things as he saw in the theatre. Holden also shows his hatred towards three women he meets at a bar because they are only interested in movies and famous actors. In Chapter 16, when Sunny, the prostitute, tells Holden she spend most of her time at the movies,he calls her the "queen of phonies". The irony is that Holden is going to a play in the afternoon and he is paying to see a lot of those same "phony" actors.

At the end of Wuthering Heights, what was the relationship between Cathy and Hareton and what were their future plans?

Cathy and Hareton have developed a strong, loving relationship, and will undoubtedly soon be married. 

Although Cathy has long scorned Hareton, she finally relents, making overtures of friendship and offering to teach him to read.  Hareton, indignant that she blames their past enmity on him, at first rebuffs her, but he soon softens, and the cousins establish an amiable truce which quickly develops into something deeper.  The two overcome their biggest obstacle  when Hareton forbids Cathy to speak ill of Heathcliff, and Cathy, with a growing maturity based on love, decides it would only be cruel to persist in trying to make Hareton see that Heathcliff has treated him abominably, realizing that "he was attached by ties stronger than reason could break". 

As she watches Hareton and Cathy huddle like innocent, happy children over a book in Chapter 32, Nelly relates that their "intimacy thus commenced grew rapidly...both minds tending to the same point - one loving and desiring to esteem, and the other loving and desiring to be esteemed - they contrived in the end to reach it".  She sees their eventual union as ineveitable, calling it will be "the crown of all my wishes".  In Chapter 33, Heathcliff also recognizes the obvious conclusion, and reflects on the ultimate irony of how his lifelong quest to destroy the Earnshaw and Linton families has ended.

What is the great depression of the 1930's?

The Great Depression began with the crash of the stock market in October of 1929 ending the 1920's era of prosperity.  The depression deepened with the failure of thousands of banks throughout the country.  Many people lost their entire savings.  It was the most severe and longest depression the country or the world had ever seen and it was aggravated by climatic factors including a dust-bowl that ruined the farming economy of the Midwest at the same time.  The depression continued throughout the thirties despite the FDR's attempts to stimulate the economy.  It was not until World War II and the wartime demand for products, that the economy really began to recover.

Do the decadent world and the power of wealth presented in The Great Gatsby hold little relevance to a modern reader?

I would argue that the novel is more relevant to modern
readers now than it might have been 20 years ago.  Right before the current recession,
many Americans were living beyond their means.  While they didn't live in Gatsby-esque
houses, they were certainly buying houses and other material items that they could not
afford to maintain.  If one considers that the Roaring 20s led to the Great Depression
(in part) and that America's obsession with materialism and propensity for taking on
debt led to our current situation, then the modern reader should see many similarities
between Gatsby's time period and ours.

Additionally, wealth
is just as powerful in today's society as it ever was.  In regards to the wealthy buying
their way out of trouble or buying their way into positions of power, examples in
politics and entertainment abound.  Many of the powerfully rich still have an elitist
attitude similar to the Old Money folks in
Gatsby.

While our version of decadence
might differ from Gatsby's and Tom and Daisy's, we still have shows such as
Cribs, The Hills, The Real
Housewives series, etc., that show the rich eating out every meal, paying
exorbitant amounts of money for items of clothing, and furnishing their second or third
homes as if it's nothing.

How does Dana get home because she believes that her life is in danger in the novel Kindred? Give an example.

I'm not sure what you are asking with this question, but I will try to answer it. When Dana's life is in danger, she is sent back to the present time of 1976. When Rufus is in danger, Dana is then sent back to the past. She must protect Rufus since he is the future father of her first woman who is listed in her family records.

The first time Dana is called back by Rufus is when he almost drowns in the river. Dana saves him, but a gun is aimed at her head, so she's transported back to 1976. The next time she goes back, Dana is caught teaching black children to read, and she is beaten for it, which causes her to go back to the present. Another time, Rufus sold a slave he felt was too friendly with Dana, and Rufus punches her in the face when she protests. Dana feels cutting her wrists will be the only way to take her back to the present, and she's correct. The last time Dana is sent back, Rufus tries to rape her, and she stabs him. Rufus won't let go of her arm, however, and when she returns to 1976, her arm is crushed.

In Book IV of "The Iliad," what does Agamemnon say to Diomedes? What feats does he bring up, and why?

Agamemnon rebukes Diomedes' because of Diomedes' shy nature and timidity in the face of battle: "...why are you so shy? So wary of the passages of war?" (lines 447-448, book IV, page 94 Fitzgreald translation). Agamemnon found him standing still with "combat cars and horses all around him" (line 442). He mentions the feats of Diomedes' father Tydeus: "he [Tydeus] would rather fight alone ahead of all his men" (lines 450-451), as a leader who charges forth, not one who lags behind, or waits for battle. Tydeus led a charge on the "ancient walls of Thebes" by carrying a message. He challenged those he encountered there to a wrestling match, and won. He also killed the fifty men who tried to ambush him on his return to his fellow soldiers. These feats showed great courage, wheras Diomedes showed cowardice. The final blow from Agamemnon, and a summation of the point can be found in the line, "Weaker than he [Tydeus] in war, the man he fathered [Diomedes]" (line 482). Agamemnon's entire rebuke can be read from lines 440-483.