Questions Asked on
November 17, 2007

  1. Math - Trig - Double Angles

    Prove: cos4x = 8cos^4x - 8cos^2x + 1 My Attempt: RS: = 4cos^2x (2cos^2x - 1) + 1 = 4 cos^2x (cos2x) + 1 LS: = cos2(2x) = 2cos^2(2x) - 1 = (cos^2(2)) - cos^2(2x)) - 1 ----- Prove: 8cos^4x = cos4x + 4cos2x + 3 My Attempt: RS: = cos2(2x) + 4cos(2x) + 3 =

    asked by Anonymous
  2. chem

    A piece of solid carbon dioxide, with a mass of 6.2 g, is placed in a 4.0 L otherwise empty container at 21°C. ( a) What is the pressure in the container after all the carbon dioxide vaporizes? atm (.86 atm) (b) If 6.2 g solid carbon dioxide were placed

    asked by mel
  3. Objective functon

    An objective function and a system of linear inequalities representing constraints are given. Graph the system of inequalities representing the constraints. Find the value of the objective function at each corner of the graphed region. Use these values to

    asked by Soly
  4. Business Communication

    This is the assignment. What would you suggest your boss change in the following email message, and why? Would you consider this message to be audience centered? Why or why not? Revise the email so that it follows effective communication guidelines. This

    asked by Cupcake
  5. physics

    a coast guard ship is traveling at a constant velocity of 4.20m/s, due east, relative to the water. on his radar screen the navigator detects an object that is moving at a constant velocity. the object is located at a distance of 2310m with respect to the

    asked by ajo
  6. Dr. Bob

    Okay so I read your part on the discussion... and I added it to my discussion it just seems like I need more my professor said that the discussion part is supposed to repeat everything talked about in the previous sections like the intro,methods ect. It

    asked by Suzy
  7. dr. bob

    Use the data in Table 5.4 to calculate the partial pressure of He in dry air assuming that the total pressure is 1.0 atm. Assuming a temperature of 21°C, calculate the number of He atoms per cubic centimeter. atoms/cm3 .00000524 - atmospheric composition

    asked by mel
  8. chem

    A 75.0 L stainless steel container was charged with 3.00 atm of hydrogen gas and 4.00 atm of oxygen gas. A spark ignited the mixture, producing water. What is the pressure in the tank at 25°C? in atm What is the pressure in the tank at 125°C? in atm

    asked by mel
  9. Mike

    N2 + 3H2 --> 2NH3 At 25°C (delta)Ho = -92.22 kJ and (delta)So = -198.53 J/K. Using this information, calculate the equilibrium constant for the reaction at 2.43x10^2°C. (R = 8.314 J/K) Apparently the way I'm doing it is wrong: I divide 198.53 by 1000

    asked by Chemistry
  10. English Grammar

    1. TV gives us a lot of pleasure. 2. TV gives a lot of pleasure to us. Sentence 1 is a Sentence Pattern Four sentence. This sentence can be changed into a Sentence Pattern Three sentence as in Sentence 2. Change the direct object and the indirect object,

    asked by John
  11. chem

    A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is withdrawn and adjusted to 1.00 atm at 23°C, it is found to have a volume of 1.55 cm3. The gas remaining in the first container shows

    asked by mel
  12. Dan

    N2 + 3H2 --> 2NH3 At 25°C (delta)Ho = -92.22 kJ and (delta)So = -198.53 J/K. Using this information, calculate the equilibrium constant for the reaction at 2.43x10^2°C. (R = 8.314 J/K) Apparently the way I'm doing it is wrong: I divide 198.53 by 1000

    asked by Chem
  13. Math - Trig - Double Angles

    Prove: sin2x / 1 - cos2x = cotx My Attempt: LS: = 2sinxcosx / - 1 - (1 - 2sin^2x) = 2sinxcosx / - 1 + 2sin^2x = cosx / sinx - 1 = cosx / sinx - 1/1 = cosx / sinx - sinx / sinx -- Prove: 2sin(x+y)sin(x-y) = cos2y - cos2x My Attempt: RS: = 1 - 2sin^2y - 1 -

    asked by Anonymous
  14. Physics

    A certian radioactive isotope has a half-life of 1 hour. If you start with 1 gram of the material at noon, how much of the original isotope will the sample contain at 3 pm? At 6 pm? At 10 pm?

    asked by Judy
  15. chem

    a) Calculate the pressure exerted by 0.5160 mol N2 in a 1.0000 L container at 24.6°C using the ideal gas law. atm (b) Calculate the pressure exerted by 0.5160 mol N2 in a 1.0000 L container at 24.6°C using the van der Waals equation. atm (c) Compare the

    asked by mel
  16. chem

    A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is withdrawn and adjusted to 1.00 atm at 23°C, it is found to have a volume of 1.55 cm3. The gas remaining in the first container shows

    asked by mel
  17. chem

    A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is withdrawn and adjusted to 1.00 atm at 23°C, it is found to have a volume of 1.55 cm3. The gas remaining in the first container shows

    asked by mel
  18. science

    What is the ratio of sulfur atoms to oxygen atoms in SO2?

    asked by Colin
  19. Law and Ethic in Med

    Please check my answer thanks :) I am really not sure on this one What can a stillborn child's estate do with regqurds to lawsuits ? 1. Sue for wrongful death in most states? 2. Sue for wrongful death in only in a few states. 3. Can't sue for wrongful

    asked by Anonymous
  20. Algebra

    Please check my answers: Solve the problem. A steel company produces two types of machine dies, part A and part B. The company makes a $3.00 profit on each part A that it produces and a $5.00 profit on each part B that it produces. Let x= the number of

    asked by Soly
  21. physics

    an airplane has a mass of 3.1*10^4kg and takes off under the influence of a constant net force of 3.7*10^4N. what is the net force that acts on the plane's 78-kg pilot? can anyone give me some hints to do this?THX A LOT!

    asked by ajo
  22. Legal and Ethical

    Compare and Contrast deontological and teleological ethical systems

    asked by I am so confused
  23. English Grammar

    e.g. The bar graph below shows the TV viewing habits of Koreans. In this sentence, what is the part of speech of 'below'? Can we write like this?: The bar graph which is below shows the TV viewing habits of Koreans.

    asked by John
  24. Algebra

    Can you please check my answer: Solve the problem. A person with no more than $4000 to invest plans to place the money in two investments, telecommunications and pharmaceuticals. The telecommunications investment is to be no more than 3 times the

    asked by Soly
  25. Chemistry - Concentration and Time

    1. How is the rate affected by doubling the concentratino? 2. Explain the effect of concentration on the rate of a reaction in terms of the "Collision Theory" of chemical reactions. 3. Considering that 1/Time is proportional to the rate of the reaction how

    asked by Dick Rogers
  26. law and ethics in med

    please check my answer thanks :) The state would most likley invoke what if a child is at risk for abuse or neglect. my answer is... Parens patriae

    asked by Anonymous
  27. Ethics

    What do you believe in the future of Asian diversity in America?

    asked by Danny
  28. English Grammar

    1. You should read problem books to pass the test. 2. I watch TV on the sofa leaning against the back of the sofa. 3.You should make your Father shoes shined. ------------------------------------- Are the three sentences all grammatical?

    asked by John
  29. Law and Ethics in Med

    Please check my answer thanks :) Give an example of paternalism prevailing over autonomy? My answer is ... Requiring a Jehovah's Wittness to receive blood transfusions against her will.

    asked by Anonymous
  30. Spanish

    Hello. :] I've tried all the online translators, but they don't work... What is materias in English?

    asked by Eve
  31. Dr. Bob

    And here is the discussion part of the lab how would I put like a concluding sentence to this. DISCUSSION: This experiment was conducted to determine the iron content in a breakfast cereal. The results indicate 39% iron in a sample of Kix cereal. This

    asked by Suzy
  32. Law and Ethics in Med

    Please check my answer thanks :) Roe v Wade is based in part on... the fetus's right to be born after the first trimester True or False My answer is True

    asked by Anonymous
  33. Economics

    What is the value added and how is it related to GDP?

    asked by Latrisha
  34. College Algebra

    These are the points on the graph! O year = $41000 1 year = $43000 2 year = $46000 3 year = $48500 The following graph shows Bob’s salary from the year 2002 to the year 2005. He was hired in the year 2002; therefore t = 0 represents the year 2002. List

    asked by Cupcake
  35. math

    Find y' : y= (8-2x^2)/(root of (8-x^2))

    asked by mo
  36. Economics

    In the event of Hurricanes in the Gulf Coast and the Market affected by event is Gulf Coast tourism is there a Shift in supply, demand, or both and the Change in equilibrium would be what?

    asked by Anonymous
  37. English Grammar

    The verb exercise is a regular verb. Exercise has a consonant and a silent e at the end, so you should edd just d to the end. And ed is pronounced [id] in this verb. ------------------------------- Is this explanation correct? If there are errors, correct

    asked by John
  38. Critical Thinking

    Can anyone tell me what the Contrapositive is for this sentence? Jane or Tom will wake up Tanner this evening. Compound: Yes Conditional: Yes Antecedent: Jane or Tom Consequent: Will wake up Tanner this evening. Contradictory: Neither Jane or Tom will wake

    asked by Diane
  39. College Algebra

    This is what I have came up with so far, but it says to plug in another value for x in number 2, what does this mean? So the equation to convert Fahrenheit to Celsius is simply to take the temp in F, subtract it by 32 and then divide that value by 1.8. So

    asked by Alicia
  40. Michael can you help with this one

    This sentence I think is slippery slope. There is no value at all in Heidegger's philosophy, especially his ethics,since he collaborated with the Nazis in running German universities in the 1930s and fired all the Jews.

    asked by Diane
  41. For DrBob

    Hey DrBob, I posted an answer to you question on my lab report just to let you know what the y= and r^2 is

    asked by Suzy
  42. Biology - photosynthesis

    1. In measuring the amount of ATP and NADPH consumed by the Calvin cycle, you find 30,000 molecules of ATP consumed but only 20,000 molecules of NADPH. WHere did the extra ATP molecules come from? A) Chlorophyll B) photosystem II C) cyclic electron flow D)

    asked by J
  43. Algebra 1

    is this a linear equation 4xy + 2y = 9

    asked by Kayla
  44. Algebra

    Plot the following points on the given rectangular coordinate system by clicking on the given dots and dragging them. Points to plot: (-3, -2 ) (-1, 0) (1, 2) If you were to connect these points with a line, where would the y-intercept be located? Give

    asked by Cupcake
  45. Partial Decompostion Fractions

    Can you please help me with the following questions please, I don't understand them. I know the general rule about them. Write the partial fraction decomposition of the rational expression. (x^2+4x-1)/(x^2+3)^2 (4x^3+4x^2)/(x^2+5)^2

    asked by Soly
  46. Law and Ethics in Med

    Please check my answer thanks :) Breach of confidentiality could have which of the following consequences ? 1. Ethical only 2. Legal only 3. Ethical or legal 4. Licensure revocation only I think # 3

    asked by Anonymous
  47. greatest events after 1987

    List five events which have occurred after 1987 that you feel have most markedly altered your economic/technical future. i have to come up with five things but i'm stuck. i'm researching on the internet but i can't find anything. telephones and electricity

    asked by julie
  48. English expression

    Who are teenagers? They are young people who are from thirteen to nineteen. Look at the words such as thirteen, fourteen....nineteen. They all have teen, so people who are from thirteen to nineteen are called teenagers.

    asked by John
  49. Math

    What is the real value of x in the equation log(subscript 2)24-log(subscript 2)3=log(subscript 5)x? I really cannot remember at all how logs work. I know the answer is 125 but have no idea how to get there. Thanks in advance.

    asked by Natalie
  50. Critical Thinking( Urgent)

    I need someone to help refute this sentence . If Zoe and !@#$%^& don't quarrel for a whole week, they'll go on vacation to the mountains. But they did quarrel. So they won't go on vacation. Is this one right? Because Zoe and !@#$%^& did quarrel for a

    asked by Diane
  51. Poster stuff

    I'm doing a project in my geometry on a career that involves geometry. I'm doing mine on a cabinet maker. My teacher says that we must be prepared to answer a couple of questions, since it is required of the class to turn in with their project. What might

    asked by Emily
  52. Dr.Bob

    I had to take cereal crush it up and place it in a crucible and cook it tell it was black ash. Then I took that burnt ceral and placed it into a beaker with HCL and water and boiled it tell the cereal was like a liquid cause coming out of the crucible it

    asked by Suzy
  53. Chemistry

    How many milliliters of NH3 (at STP) are needed to react with 45.0 mL of NO2 (at STP) according to the equation: 8NO2 (g) + 6NH3 )g) yield 7N2O (g) + 9 H2O. How to set this up????? Thanks.

    asked by Lucy
  54. Dr. Bob

    I need to know what else would I put into my discussion part of my lab report

    asked by Suzy
  55. Business

    A friend of mine is planning on becoming an insurance agent, he is trying to decide whether he should represent just one insurance company, or several companies. Can you help me think of some of the pros and cons for each option.

    asked by Justin
  56. Economics

    Are large and powerful firms easier targets for union organization than small firms?

    asked by Sharp
  57. math

    x y -4 -18 -3 -15 2 0 5 9 10 24 it's an input and output table. find the rate of change for this relationship.

    asked by Anonymous
  58. Law and Ethics in Med

    please check my answer thanks :) Dr Bob is sued for malpractice. when called to give testimony at trial. he will .... 1. be barred from revealing medical information about the patient. 2. be allowed to testify about the pt's care 3. allowed to testify, but

    asked by Anonymous
  59. Critical Thinking

    Please give me some examples of sentences this,What is a universal claim? Is this correct? Mary is the town clerk.

    asked by Diane
  60. Law and Ethics in Med

    please check my answer thanks :) Confidentiality of medical information is protected by...... 1. the US Constitution 2. no laws at all only by custom 3. none of the above My answer... I said #2

    asked by Anonymous
  61. ACCOUNTING

    THE NET INCOME OF SIMON AND HOBBS, A DEPT.STORE,DECREASED SHARPLY DURING 2000.CAROL SIMON, OWNER OF THE STORE, ANTICIPATES THE NEED FOR A BANK LOAN IN 2001. lATE IN 2000, SIMON INSTRUCTS THE STORE'S ACCOUNTANT TO RECORD A 410,000 SALE OF FURNITURE TO THE

    asked by ROSE
  62. College Algebra

    How would I find two points on a graph?

    asked by Cupcake
  63. Algebra 2

    Write an equation for the nth term of the geometric sequence: -12,4,-4/3 I had a_n=-12(3)^(n-1) but that is not a choice on the multiple answers they have = -12(1/3)^(n-1) = 12(-1/3)^(n-1) = -12(-1/3)^(-n+1) = -12 (-1/3)^(n-1)

    asked by Chelsey
  64. accounting

    calculate taxable income for 2005: this is related informaton given for 2005: income statement: sales 41,100 cogs (23,725) GP 17375 SG&a (15,492) EBIT 1883 TAXES 25% Net income 1412 tax issues: all 2005 assets purchases were made on 9/27/05 no estimated

    asked by tiaa
  65. SCI 275

    i need info.on benefits and challenges of urbanization and how the U.N. Conference gave awards for urban development projects that improved human settlements. I also need to include descriptions of two award winners,isscussing how they overcame 1 of the

    asked by dawn
  66. Economics

    What is the value added and how is it related to GDP?

    asked by Latrisha
  67. HUM 130

    i need to find 2 URL web sites dealing with indigenous culturals and/or religions. Then I need to discuss how modern civilization has impacted the spiritual lives of the indigenous peoples you explore. Are indigenous religions still practiced today? If

    asked by dawn
  68. Law and Ethics in Med

    Please check my answer thanks :) Breach of confidentiality could have which of the following consequences ? 1. Ethical only 2. Legal only 3. Ethical or legal 4. Licensure revocation only I think # 3

    asked by Anonymous
  69. commercial law

    hey there just wondering if any one could help me with ANY of the following questions pleeease??? i am so confused, am about ready to destroy my law book!! AND its due within 24 hours :( any help at all would be GREATLY appreciated! Thanks heaps in

    asked by lj
  70. Is this an argument? if so, what is the premise?

    TVC is opposed to any research that involves the deliberate killing of one human to benefit another human. "An unborn human is not of less value than a Parkinson's victim who needs treatment

    asked by Lisa
  71. law and ethics in med

    please check my answer thanks :) Which of the following is MOST pertinent in a legal or court room context? 1. confidentiality 2. privileged communication 3 etiquette 4.pt's expectaion of privacy I think it might be #2 I am not really sure

    asked by Anonymous
  72. Law and ethics in med

    please check my answer thanks :) Sally sues for malpractice, claiming she didn't know that the operation could have ( and in this case did have)negative consequnces. Your office has a copy of an informed consent signed by Sally. How will this affect her

    asked by Anonymous
  73. College Algebra

    The following graph shows Bob’s salary from the year 2002 to the year 2005. He was hired in the year 2002; therefore t = 0 represents the year 2002. These are the points on the graph! O year = $41000 1 year = $43000 2 year = $46000 3 year = $48500 List

    asked by Cupcake
  74. Law

    In theory, the law should treat everyone equally. However, in practice, this is not the case for many reasons. Young offenders belong to one group who are, in fact, treated differently by the criminal justice system in Australia (An around other countries

    asked by xxCeLoL
  75. trick question

    John, Jack, Joan and Jane are Art Critic, Aviator, Acrobat and Architect, though not necessarily in that order. The aviator, who is happily married, earns more than his sister, the art critic. Joan has never heard of “perspective”, John is a

    asked by julie
  76. Math

    Parents may help to save for their children’s university education using Registered Education Savings Plans (RESPs). Under the Canada Education Savings Grant Program, the government matches 20% of the parent’s contributions to an RESP (to an

    asked by A
  77. Science

    Is everyone having fun?

    asked by MO
  78. acids and alkali

    Is baking powder an acid or an alkali?

    asked by MO
  79. SCHOOL FUNDING ISSUES

    review the educational funding issues for New Jersey. Try to find information about the affect of school choice options on educational funding. Do you feel that there is a positive affect or a negative affect? What were some opposing viewpoints of your

    asked by MONICA
  80. Ethics

    Are fetal-protection policies discriminatory? Why?

    asked by Bruce
  81. History

    Can someone help me find some information that supports the idea that the Irish Potato Famine was really genocide?

    asked by maggie r
  82. Algebra

    For x such that 0

    asked by Annie
  83. AP US History

    What is a theocratic society?

    asked by Jennifer
  84. College Algebra

    This is what I have came up with so far, but it says to plug in another value for x in number 2, what does this mean? 1. So the equation to convert Fahrenheit to Celsius is simply to take the temp in F, subtract it by 32 and then divide that value by 1.8.

    asked by Alicia
  85. Critical Thinking( Urgent)

    How would I refute this sentence please? Mike Smith should not be a presidential candidate.After all, he has never held office.

    asked by Diane
  86. Statistics

    How do you tell if the null hypothesis rejects or fails?

    asked by LT
  87. Statistics

    What if my p value is below 0.05 does it reject or fail the null hypothesis

    asked by LT
  88. Math

    Parents may help to save for their children’s university education using Registered Education Savings Plans (RESPs). Under the Canada Education Savings Grant Program, the government matches 20% of the parent’s contributions to an RESP (to an annual

    asked by A
  89. Social Studies

    If I have birth rate, death rate, rate of increase in percent, how can I calculate the population doubling time?

    asked by Karen