Questions Asked on
July 23, 2009

  1. Geo. & Wave Optics

    An astronomical telescope consists an objective of focal lenght 100cm and an eyepiece of focal lenght 8cm. calculate the angular magnification of the telescope and also determine the distance between the two lenses.

  2. BUS 210

    Imagine that you are starting your own company. What will be the ethical code of your company? In a 200- to 300-word response, draft an ethical code of conduct listing the rules and principles that your company will use in decision-making. I just need help

  3. chemistry

    1. Need help Assigning oxidation numbers. Is it true that wehn looking at atoms in compounds from group 1 or 2 they are given the oxidization number which is the same as there charge example NaCl Na has an oxidization number of 1? But is this also true for

  4. Chem

    Methylaime, CH3NH2. If a 0.100 mol/L solution of methyamine has a pH of 11.80, calculate the ionization constant for the weak base. What is an ionization constant. Is it just K? This is what I did so far: 11.80 = -log (concentration of h3o+) 10^-11.80 =

  5. SCI 225

    In your own words, define environmental sustainability. Then, list three behaviors of your own that threaten environmental sustainability. How could you change those behaviors to reduce threats to environmental sustainability?

  6. Math

    |-9-r| > 3 I believe the answer is r < -12 or r > -6

  7. math

    1)tammy is making a poster. she had planned the poster to be 36 inches high and 24 inches wide. If she instead decides to make the poster 24 inches high, but keeps the same proportions, how wide will the poster be in inches? my original answer was 12. But

  8. math

    a chemist has a solution that is 20 percent alcohol by volume. which of the following expressions represents the percent of alcohol by volume when m litersof the solution is mixed with h liters of pure alcohol and p liters of water? a) 20(m+h+p)% b)

  9. math

    the average of 20 numbers in a list is 32. when a number is added to the list, the average becomes 34. What number was added to the list? so i started like this... x/20= 32 my answer is 640. is this correct?

  10. Finite Math

    Find the slope of a line through the points (11,-2) and the origin.

  11. chemistry 11

    I'm having a trouble with this question. "Calculate the concentration of the Solute in mol/L in : a) 125 mL of .64M HCl diluted to 2.0L

  12. Chemistry

    Write the net ionic equation for silver nitrate and sodium chloride. I only know how to do it when it deals with elements, not compound.

  13. world history

    I never saw Shindler's List in the movie house because I was afraid to. So I saw it on my TV several times. My question is, what was the relationship between Amon and Helen Hirsch? Lovers? Hard to believe. What happened to her after leaving Poland? Is she

  14. writing

    How can rhetorical devices be used both prejudicially and nonprejudicially?

  15. Algerbra 1, 9th grade

    what would the y-intercept be for y=2x+5?

  16. math

    if attendance at a certain high school had incresed by 30 percent over lasy year, this years attendance would have been 1430. In reality, attendance fell by 35 percent from last year. what was this years attendance? im not sure where to begin... am i on


    needing some ideas on an extended experimental investigation on how chemicals stimulate plant growth (maybe a crop or vegetables)

  18. sound

    a surface recieving sound is moved from its original position to a position three times farther away from the source of the sound. the intensity of the received sound thus becomes

  19. physics

    get the resultant of the following displacements 6 ft.southwest; 10 ft. northwest; 4 ft. southeast; 12 ft. northwest; and 3 ft. southwest. what is the direction of the resultant displacement?

  20. Basic economic True or False questions?

    UGHHHHH I CANNOT FIND THESE ANSWERS ANYWHERE DD; 1. On an economic supply and demand graph, consumer surplus is always located above the demand curve. True or false? 2. Wealth is destroyed when socially optimal products are created. True or false? 3. A

  21. SCI 225

    Reflect on your own worldview and compare it with the worldviews presented in the text. Provide examples of the benefits of your view to defend your position.

  22. SCI 275

    In your own words, define environmental sustainability. Then, list three behaviors of your own that threaten environmental sustainability. How could you change those behaviors to reduce threats to environmental sustainability?

  23. math

    can you answer this question in a different and more logical way than this method below: we will examine the sum of cubes of two numbers, A and B. Without losing generality, we will further assume that A=2nX and B=2n+kY where X is not divisible by 2 n is a

  24. Finance - Accounting

    Can somebody people check this out and let me know if I did it right? Your uncle offers you a choice of $30,000 in 50 years or $95 today. If money is discounted at 12 percent, which should you choose? You should take the $95. Option #1: Using appendix b PV

  25. Math

    I say that - |-15|-| 41|= -56; my best friend say that -| -15|- |41|= -26. Which one of us is correct? This answer depends on a dinner. Thanks.

  26. Human services

    What is the importance of informed consent and confidentiality in human services?

  27. English

    This question is based on the book "The Curious Incident of the Dog in the Night-time" by Mark Haddon. What do you think makes a hero? How does Christoper fit your idea of a hero? He has been described by some readers as "a new kind of hero" or "an

  28. Finance

    Taggart Inc's stock has a 50% chance of producing a 21% return, a 30% chance of producing a 10% return, and a 20% chance of producing a -28% return.What is the firms expected rate of return? Please help

  29. Investing

    You hold a diversifield $ 100,000 portfolio consisting of 20 stocks with 5000 invested in each . The portfolio's beta is 1.12. You plan to sell a stock with b=0.90 and use the proceeds to buy a new stock with b=1.75. what will the portfolio new beta be ?

  30. business

    In what ways are expository essays similar to business communications?

  31. Math

    estimate 4 1/9+ 7 9/10+ 2 1/7 + 5 7/8=

  32. Statistics

    8.11) For the manufacturing plant discussed in Exercise 8.10, the union president and the human resources director jointly select a simple random sample of 36 employees to engage in a discussion with regard to the company’s work rules and overtime

  33. history

    describe what Kennedy hoped to accomplish with the New Frontier.

  34. science

    why is water blue?

  35. child psycology

    We see indications that a child's role in perceptual development is passive when we observe? A. irrelevent information made relvant. B. selective attention. C. a preference for certain stimuli. D. systematic search.

  36. Algebra

    a bag contains 13 marbles of which 10 are red. A marble is selected at random and replaced. A second marble is then selected at random. What is the probability that both marbles are red?



  38. eth 125

    t a 200- to 300-word summary of a current issue between Native Americans and the federal government. Identify the legislation that you think is linked to the issue, and explain why you think there is a connection. Consult the National Congress of American

  39. maths

    solve Z^5 - 1 =0 where Z is a complex number

  40. Finite Math

    1. Find the inverse of the following matrix: [ 1 0 1 ] [ 2 -2 -1 ] [ 3 0 0 ]

  41. math

    in a basketball game, the star player scored 3 times as many points as the average score of the 9 other players. what fraction of the points scored by the entire team did the star player score? so i guess the total number of players is 10. and then i think

  42. math(simple interest)

    Suppose that the current rates on 60- and 120-day GICs(Guaranteed Investment Certificates) are 5.50% and 5.75%, respectively. An investor is weighing the alternatives of purchasing a 120-day GIC versus purchasing a 60-day GIC and then reinvesting its

  43. Finite Math

    Solve the matrix equation AX =B for X using: A= [ 2 -3] B= [4 ] [ 1 5] [2 ] (theres a blank space between the 4 and the 2)

  44. history

    three characteristics of Orientalism and how may Orientalism and prejudice the Arab and Muslims contribute to hate crimes against these groups

  45. GEN 200

    Develop a strategy for effective communication and collaboration among selected styles. Identify at least three different personality types. I need help finding the above ?s. This question I have answered but I am not sure if it is write the way I wrote it

  46. english

    pls help!!!! Give any three specific weather descriptions from A Separate Peace and list the corresponding action in the plot.

  47. Algebra

    Diagonal brace. The width of a rectangular gate is 2 meters (m) larger than its height. The diagonal brace measures sqrt6m. Find the width and height.

  48. fashion

    what is a denim ?

  49. Chemistry

    A 19th-century chemist, Marcellin Berthelot, suggested that all chemical processes that proceed spontaneously are exothermic. True or False? I thought it was true, but then in my chemistry textbook, I could not find this person's name. Can someone verify

  50. math

    I am not great at math, but i am practicing slowly... Joanne’s odometer read 25,230 miles at the beginning of a trip and 27,215 miles at the end. If she used 35 gal of gas for the trip, what was her mileage (? mi/gal) now do I subtract 25, 230 from

  51. Algebra

    Find all of the zeros of the polynomial function and state the multiplicity of each. f (x) = (x^2 – 16)^2 A. – 4 with multiplicity 2 and 4 with multiplicity 2 B. – 4i with multiplicity 2 and 4i with multiplicity 2 C. 4 with multiplicity 2 D. 4 with

  52. Algebra

    For f(x) = x^3 – 4x – 7, use the Intermediate Value Theorem to determine which interval must contain a zero of f. A. Between 0 and 1 B. Between 1 and 2 C. Between 2 and 3 D. Between 3 and 4 I am leaning towards Choice A. What does everyone think? I

  53. college

    Explain why housing prices vary from city to city. Clearly explain how supply and demand affect the prices of the homes and be sure to show your work.

  54. statistics

    ok i was given a set of data asked to create a graph of my choice to represent the data then i'm asked Does the sahpe of the distribution allow the use of the mean and the standard deviation to describe it? ok how does the mean and the standard deviation

  55. Finite Math

    Solve the matrix equation AX =B for X using A=[2-3] [1 5] B=[4 ] [2 ]

  56. Math 117

    1. how many three-letter code symbols can be formed using a set of 5 different letters in repetion is not allowed? 2. Mark can remember only the first 5 digits of his friends phone number. He also knows that the number has 7 digits and that the last digit

  57. Algebra

    Which of the following describes the end behavior of the graph of the function f(x) = –2x^5 – x^3 + x – 5 A.Downward to the left and upward to the right B.Upward to the left and downward to the right C.Downward to the left and downward to the right

  58. grade 4 math

    How would I add 2/3 + 6/9... This is really hard. Someone plz help me!!

  59. math

    I need to check my answer... please help... the prime factorization in powers of primes of the number: 16380. 5460 to the power of three is this correct

  60. math

    The table shows the closing value of a stock index for one week in March, 2004. a. Using the day as the x-value and the closing value as the y-value, write equations in slope-intercept form for the lines that represent each value change. b. What would

  61. literature

    I need help developing a thesis statement for an analytical essay on Oedipus Rex and A Raisin in the Sun. I have to compare and contrast these two pieces of literary work. Can someone please help me?

  62. chem

    Calculate the [h3o+] and [oh-], pH and the percent dissociation for both 0.25 mol/L HCl and 0.25 mol/L HCN. 0.25 mol/L HCL [H+] = 0.25 mol/L [OH-] = 1 x 10^-14 / 0.25 = 4 x 10^-14 pH = 0.60 % dissociation = ? ( I don't know how to figure out percent

  63. math

    Could you tell me how exactly to graph piecewise functions.

  64. chemistry

    hi im having problems figuring this out. consider the titration of 100 ml of 0.200 acetic acid by 0.100 koh. Calculate the ph if 250 ml of koh is added ? I tried to find the limiting reagent and go from there but it was a no go then i used the kb for find

  65. Science

    Explain why the inside of cans are coated with a thin layer of tin or plastic.

  66. algebra

    in 1995 the life expectancy of males in a certain country was 67.4 years. in 2000, it was 70.9 years let E represent the life expectancy in years t and let t represent the number of years since 1995. the linear !@#$%^&ntion E(t) that fits the data is E