Questions Asked on
March 8, 2007

  1. Economics

    7. Suppose there are two possible income distributions in a society of ten people. In the first distribution, nine people have incomes of $30,000 and one person has an income of $10,000. In the second distribution, all ten people have incomes of $25,000.

    asked by Sarah
  2. Math [AP Statistic]

    I have problem understading and doing this AP prolem. Please help me explain it clearly so that I could understand it. Problem: Since Hill Valley High School eliminated the use of bells between classes teachers have noticed that more students seem to be

    asked by Jennifer
  3. discrete math

    If a and b are positive integers, prove that: ab = gcd(a,b)*lcm(a,b). Can visualize this being true and easily create examples just don't know how to prove algebraically. well the gcd of any two number can be found by multiplying the two numbers together

    asked by Rom
  4. Physics

    In a game of pool the cue ball strikes another ball of the same mass and initially at rest. After the collision the cue ball moves at 3.50 m/s along a line making an angle of 22 degrees with its original direction of motion. and the second ball had a speed

    asked by Nat
  5. English

    Can someone help me with this? Is this a simple sentence or a fragment? We knew that we would lose the game and the opportunity of a state championship. It is a complete sentence, but not a simple one. It is a complex sentence We- subject, Knew verb, That

    asked by Lisa
  6. Math

    How many subsets of a set with 100 elements have more than one element? The answer to your question is the number of all of the subsets minus the number of subsets with just one element. had do you find the perimeter and the area whats the measurment of b

    asked by eric
  7. pre algebra

    anita, cheri, miguel, and jake went bowling one night for fun they decided to pit the girls against the boys, with the highest score for each team winning. anita scored 18 less than miguel, cheri's score was 16 less than twice anita's, cheri outscored jake

    asked by rora
  8. math

    need help with math word problems. just don't understand. What is the number? you have a four digit number where the thousands digit is four greater than the hundreds digit.The tens digit is twice the thousands digit. The ones digit is half of the

    asked by vince
  9. Bio-URGENT

    OK i did a lab in which we had to calculate the rate of reaction by observing how much gas was produced by the experiment. to do this we used a ubside down graduated cylinder in a tub of water and placed a gas collection tube between the testube and the

    asked by Jannette
  10. chemistry

    is NH2 an amine and classed as ammonia and is c=0 or N-H an amide any help would be appreciated http://www.onelook.com/?w=amide&ls=a RNH2 is basic and acts much like ammonia. The -CONH2 group is an amide.

    asked by bex
  11. Chemistry

    enthalpy of combustion kj mol H2 + 1/2 o2 = h20 + 286 kJ how much did you see? 62.4 ml H2 1 mol of any gas at NTP = 24.5 L You need to clarify your question. Also define NTP.

    asked by San
  12. Economics

    Suppose that the Government runs a pension fund to which all workers must contribute. The employee contribution rate is 6.2 percent on the first $84,900 of income. All income in excess of $84,900 is not taxed for pension purposes. What was the effective

    asked by Tisha
  13. Chem Question

    What is the molarity of a NCL solution if 37.50 mL of the acid is needed to neutralize 25.00 mL of 0.0725 M NaOH? I'm not quite sure how to go about doing this one. And also this one thing. The following technical errors were committed in standardizing the

    asked by Angie
  14. algebra

    An open-top box is to be constructed from a 6 foot by 8 foot rectangular cardboard by cutting out equal squares at each corner and the folding up the flaps. Let x denote the length of each side of the square to be cut out. 1. Find the function V that

    asked by Jade
  15. Social Studies

    What were the colonial and territorial days of Minnesota? Minnesota wasn't a colony. The territorial days were those years when Minnesota was a territory. For more information, please check this site. http://en.wikipedia.org/wiki/Minnesota_Territory

    asked by Ravneet
  16. chemistry

    NaCN - DEDUCE TYPE OF BONDING THAT HOLDS THIS COMPOUND TOGETHER, EXPLAIN IN 1 OR 2 SENTENCES. There is a covalent bond between the C and N atoms in the CN- ion, and an electrostatic bond between the Na+ and CN- thank you very much

    asked by Desmond
  17. CHEMISTRY

    SORRY ADD ON TO MY PREVIOUS QUESTION. I ALSO NEED TO WORK OUT THE PH OF THE SULFURIC ACID SOLUTION. http://www.jiskha.com/search/search.cgi?query=21g

    asked by Desmond
  18. chemistry

    I'm drawing a Lewis structure for hydrogen cyanide using nitrogen with a valency of 3. Would I still need 2 dots after the N or would this represent nitrogen valency 5? You need the two extra electrons for N at the end. Only the electrons involved BETWEEN

    asked by Hol
  19. Check Math Answers

    What are the values of the trigometric functions; The choices are 1, -1, 0, undefined. tan(-270degrees) answer: undefined cot(-270 degrees) answer:0 sec(-270degrees) answer:undefined correct

    asked by raven 31791
  20. Organic Chem/ Calculate Yield

    How would you calculate the percent yield for a reaction that began with 10 moles of acetone and 16 moles of benzaldehyde which yielded 6 moles of dibenzalacetone as the product? The molecular weights are as follows (acetone = 58.08 g/mole), (benzaldehyde

    asked by Steve
  21. chemistry

    Can someone help me finish this equation, please? We're adding Magnesium to Copper sulfate and getting Copper. This is what I have as of now: CuSO4+Mg===>Cu I'm guessing it is a single replacement, so should I add MgSO4 to the right? But then my lab

    asked by Lydia
  22. History

    the stock market crash weakened the nation's banks because of what? I THINK it is because people had borrowed money to buy stocks and when the market crashed people couldn't repay their debts. There was also a 'run' on the banks from people who had put

    asked by tina
  23. pre-cal

    Find the roots of the function f(x)= x^2+2x+2 Determine f(x) a) (x+1-i)(x+1+i) b)(x+1-i sqrt of 2)(x+1+i sqrt of 2) c)x-1+i)(x-1-i) d)x-1+i sqrt of 2) (x-1-i sqrt of 2) Please Help! For all of these, use the rule [f(x) + ai]*[(f(x) - ai} = [f(x)]^2 + a^2

    asked by raven 31791
  24. CHEMISTRY

    A 21g SAMPLE OF SULFURIC ACID IS DISSOLVED COMPLETELY IN SUFFICIENT WATER TO MAKE A .025 LITRE OF FINAL SOLUTION. CALCULATE THE HYDROGEN ION CONCENTRATION (IN mol1-1)IN THIS SOLUTION. GIVE YOUR ANSWER IN SCIENTIFIC NOTATION TO AN APPROPRIATE NUMBER OF SIG.

    asked by Desmond
  25. Algebra 1

    Are these right? xy - 3x - 8y + 24 (3x-y)-(8y+24) 8y+24 4x^2 + 20x + 5y +xy 36x+(5y+x) 36x-5y I don't think so it's right.Your question xy-3x-8y+24 is itself the answer.It cannot be further calculated bcause it doesn't have the terms containing the same

    asked by mike
  26. chemistry - s103

    Post your question. Perhaps we can help. Is there anyone out there who understands Q5 of tma06 for s103? I don't understand a word of it hi i think that the functional group are NH2 and the c=0 does anybody come up with that they to me are all amine part

    asked by DrBob222
  27. Chemistry s103 Q5

    struggling to get this to come out right: Compound 1 CH2=CH-CH-OH | CH3 + Compound 2 O || CH3-CH-CH2-C | OH | | ? (i) identify any functional groups in compounds 1 & 2 by circling them and naming them clearly. (ii) complete the equation for reaction 1 by

    asked by Desmond
  28. Spelling

    Brother:Mother::Fly:_ _ _ _ brother is to mother as fly is to______ What are your choices? fhgvhfduigbvfuis visgfebgjdfgjeghjkdsfgjebvvuydfgvuygugugvuegvuggdjfgrtuer jhfdgsuyfuegfuyguegugruhgieyigygjhguirighyi

    asked by Bobby
  29. Science

    If a brake system fails due to lack of fluid, is the lack of fluid a basic, primary, or secondary event in a fault tree analysis? It could be primary, however, usually, it would be secondary, the primary failure being a ruptured hose or O ring. Thanks!

    asked by Mary
  30. matn

    need help with word problem? half add it Find a number such that when added to numerator and denominator of 2/11 yields a fraction equivalent to 1/2? thanks for any help (x+2)/(x+11) = 1/2 x is the number you want. Now do the algebra. I will be happy to

    asked by vince
  31. MATH

    A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 5km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 4 minutes later? You

    asked by jimmy
  32. Trigonometry Urgent!

    I am writing a paper on the 8 trigonometric identites but can't find any information on them. Please does anyone know of any websites that would have things like their history, development, applications in ancient times, origins, etc. Please help.

    asked by kate 316
  33. Graphing trigonometric function

    sine and cosine have a period 2pi tangent and cotangent have period pi Can someone explain why? thanks a lot. well tangent is sine/cosine and there a place where the tangent function is undefined and that is where the asymptotes occur. the same is true

    asked by Anonymous
  34. Calculus test tomorrow

    A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 5km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 4 minutes later? I know

    asked by jimmy
  35. math

    The minimum daily values (MDVs) for certain foods are given. They are based on a 2000 calorie per day diet. Find decimal and fractional notation for the percent notation on each sentence. a)

    asked by carol
  36. Biology

    What is the formula for field of view? Thank you for using the Jiskha Homework Help Forum. Here are some sites that hopefully will help you: 1. (Broken Link Removed) 2. http://www.rainbowcctv.com/tech/angle.html 3.

    asked by j
  37. Language Arts

    I need a book report book that is at least high school level but is contemporary fiction and is interesting too. Do you have any ideas? I've given my teacher 3 or 4 choices but none of them are high school credit. Choices I've Already Tried: Leaving Jetty

    asked by Emily
  38. Science

    Here are some muliple choice questions I am stuck on. Thanks in advance for help any one can give me. 1) A falling object that has reached its terminal speed continues to gain? a.speed b.both speed and acceleration c.acceleration d.neither speed nor

    asked by Anonymous
  39. law,help

    any suggestions will really help or ideas....thanks .... Which is more effective, street justice by police or processing juveniles through the court system? It depends on what you mean by street justice. If you mean early intervention in neighborhoods, it

    asked by kyln
  40. Career Question

    Hi everyone, I've got a career-related question. A few weeks ago, our class took a "Career Cruising" quiz, which is meant to help students explore career options that correspond to their interests and talents. Based on my quiz answers, my homeroom teacher

    asked by Grant
  41. math

    Why can not a line segment have more than one midpoint Because the definition of a line segment is a segment with two endpoints. If there are only two endpoints then there can only be one middle, hence one midpoint.

    asked by usha
  42. Websites

    Someone asked a while ago about posting web sites and I just read it. Just wondering how to post web sites. I know some can and some can't. So I'm assuming there are certain levels of permission for doing it? Is there a way to "move up" the ladder if I

    asked by MattBronsil
  43. Chemistry

    "explain with the help of an appropriate labelled sketch diagram how hydrogen atom which has only one electron has so many spectral lines" Can someone tell me if i need to draw a schroedinger model of an atom or if i need to draw an energy level diagram?

    asked by Hol
  44. Statistics

    Below Find a sequence of probabilites generated using excel.What is this mystery poisson functions M? Be precise, down to one decimal and show work.

    asked by Jason L
  45. science

    i really need to know what alkalis and acids are in soap!!! FOR TOMMOROW! Thank you for using the Jiskha Homework Help Forum. Here is something on soaps from a Chemistry site: http://www.cleaning101.com/cleaning/chemistry/ page 2 =

    asked by hollyxx
  46. pre-calc

    What is the trigonometric function for cos(-270)? a)1 b)-1 c)0 d)undefined Put cos(-270 degrees) in the google search engine.

    asked by raven 31791
  47. Chemistry

    Compound 1 Compound 2 O || CH2=CH-CH-OH + CH3-CH-CH2-C | | | CH3 CH3 OH | | ? (i) identify any functional groups in compounds 1 & 2 by circling them and naming them clearly. (ii) complete the equation for reaction 1 by drawing the abbreviated structural

    asked by Desmond
  48. Sequences

    Find the fifth term of the sequence a sub1 = 12, a sub n+1 = a sub n / n+1? a)1/10 b)1/30 c)12/5 d)1/2 12,6,2,1/2, 1/2 divided by 5

    asked by raven 31791
  49. Writing PLEASE HELP!!!!

    i need a story that has a genre of realstic fiction please its due tomorrow!! Cold Mountain or Thirteen Moons by Frazier are two

    asked by Anonymous
  50. Sequence

    What is the fifth term of the sequence a sub n=5-n^2? a)-11 b)-20 c)-7 d)-5 what is your thinking on this? I think that the answer is d, -5, that seems to be the most reasonable answer.

    asked by raven 31791
  51. math

    how do you name a obtuse angle when you are naming an angle just look for where the angle occurs and when writting it place it in the middle of the three points and draw a little triangle thingy over the top for eg. angle ABC would mean the angle occurs at

    asked by zaire
  52. English

    need some help with commas: 1) I believe these experiences, my interest in blablabla, as well as my enthusiasm for blablabla (comma here or not?) make me a strong candidate for blablabla. 2)These are just some more reasons(comma here or not?) why I think

    asked by Anne
  53. science I NEED HELP....WORTH 45%OF MY GRADE

    wat is blasstoff like???? earth's orbit???????? wat do they do to stay healthy???? wat type of exercise do they do????? effect on weightlessness?????? atmosphere of the moon???? lunar soil and craters???? transportation on the moon???????? science

    asked by tita
  54. Sequence

    What is the fifth term of the sequence a sub n=5-n^2? a)-11 b)-20 c)-7 d)-5 I believe that the answer that fits the best is d, but I could be wrong.

    asked by raven 31791
  55. SCIENCE

    I need help. I cannot find an answer to this in my book. What would happen to a frog placed in seawater? What would happen to a sea cucumber put in fresh water? The concept here is osmosis. Bear in mind sea water is concentrated salt water. Then read the

    asked by Suzi
  56. Survey...please help by answering.

    Hi I'm supposed to ask 5 people about discrimination. Can you please help me by answering just these 2 questions. Thank you. 1 . What kinds of discrimination have you experienced or observed? 2. What do you think can be done to end discrimination? 1.

    asked by Amanda
  57. MATH(PLease Help)

    Problem: (y+2)/(y) = 1/(y-5) Directions: Solve the rational expression. Remember that if: a/b = c/d then: a * d = b * c I believe in school they call this the fraction crossover rule or fraction cross rule or something like that. i would work it like a

    asked by margie
  58. chem

    can someone tell me which of the following elements are expected to be the most easily reduced: Ca, Sr, P, or Cl? thanks Reduction is the gain of electrons. In general, electrons are more easily gained by elements from left to right in the periodic table

    asked by Donny
  59. 6th grade math

    I still do not understand this problem? find a number such that when added to the numerator and denominator of 2/11 yields a fraction equivalent to 1/2? thanks If you add 7 to the numerator and 7 to the denominator you get 9/18. 9/18= 9x1/9x2 = 1/2 It

    asked by vince
  60. science

    I need help findnig out the error involved with using a graduated cylinder and gas collection tube to calculate the rate of reaction. We beed more details than you have provided. What kind of experiment did you do? What reaction was involved? How did you

    asked by Jannette
  61. Pre Calculus

    Find the roots of the function g(x)=x^3 +16x a)0,4i, -4i b)0,-4,-4i c)0,4,4i d)0,4,-4 The equation can be rewritten x(x^2 + 16) = 0 The function is zero if x = 0, OR if x^2 = -16 That should give you a hint of what the roots are. So you take the square

    asked by raven 31791
  62. science

    Is the active ingredient in red tomatoes Lycopene? Active for doing what? Research indicates that lycopene is one of several ingredients that are effective in reducing prostate cancer risk in rats. See http://news.bbc.co.uk/2/hi/health/3239483.stm Lycopene

    asked by Ron
  63. social studies 10

    we have an assignment that we have to write what would happen if in Yellowknife would be a gold rush in 2007... i don't know that to do, because i cannot really know, im new to canada... plz help Gold Rushes bring a lot of people that are looking for a

    asked by marcela
  64. Calculus

    Find the equation of the tangent to the graph of f(x)=2x^4 (to the power of 4) that has slope 1. Derivative is 8 x^3. This equals 1 at x = 1/2. At this point the y-coordinate is f(1/2) = 1/8. The equation of the tangent line is thus: 1/8 + 1*(x-1/2) = x -

    asked by Aurora
  65. groupie

    can someone help me with this:48x^2y + 20xz +12xy + 5z This subject is MATH, not 'groupie'!! HOW MANY SQUARE FEET IN AN HALF AN AKER Wendy: ACRE> http://www.onelook.com/?w=acre&ls=a and there are 9 square feed in a square yard. i am in 6 grade it is really

    asked by mike
  66. biology

    True or False: The multi-cellular stage in the life cycle of a fungus is haploid. http://staff.jccc.net/PDECELL/celldivision/lifecycles.html#fungi Yes, true. And to make it more interesting, there is a species of fungi that live in symbosis with orchid

    asked by bio
  67. pre calc

    what is the trigometric function of cos pi? a)0 b)-1 c)1 d)undefined Paste this in your Google search window: cos(PI)

    asked by raven 31791
  68. Statistics

    What key problems can a supermarket address and solve utilizing the poisson/exponential combination?

    asked by katie
  69. Economics

    Suppose that the Government runs a pension fund to which all workers must contribute. The employee contribution rate is 6.2 percent on the first $84,900 of income. All income in excess of $84,900 is not taxed for pension purposes. What was the effective

    asked by Tisha
  70. urban communities

    This site may help you. http://www.sparknotes.com/lit/breatheyes/ Thank you for using the Jiskha Homework Help Forum. No, I haven't personally read the book, but here are some sites to help you. 1. SparkNotes = http://www.sparknotes.com/lit/breatheyes/ 2.

    asked by Ms. Sue
  71. ela

    how many high students allow students to pay for school lunch? how much the income has to be in order not to pay for lunch? The guidelines vary from state to state, you have to go to your school to find out. Family size has a big impact on it, as well as

    asked by anais
  72. Science

    I have a few more science questions. If a car increases its velocity from zero to 60 km/h in 10 s, its acceleration is ______ km/h/s a.6 b.10 c.60 d.600 Is it c? a 75kg person and a 200 kg crate are each parachuted to ear from a plane. Which is correct?

    asked by Anonymous
  73. Chemistry s103 Q5

    Sorry cannot get formula to come out right - all items move to left Now you see the problem. But that can be overcome with line drawings and a word of explanation.

    asked by Desmond
  74. Chemistry Science Project

    I need some ideas for high school science projects. It doesnt really matter what field of science, but i would prefer chemistry, biology, or physics. Really Urgent! Thanks! What about a project on osmotic pressure. Put a salt solution inside a thistle

    asked by Rachel
  75. Science

    An object travels 8 m in the 1st second of travel, 8 m again in the 2nd second of travel, and 8 m again during the 3rd second of travel. its acceleration in meters per second per second is? Would the answer to this question be 0? I'm not positive, but

    asked by Anonymous
  76. science

    i need help what do astronauts eat, drink when in space???? sanitation??? health???? exercise??? sleep?????how do they do all of this http://www.pbs.org/spacestation/station/living_sanitation.htm

    asked by tita
  77. Sequence

    What is the fifth term of the sequence a sub n = 1/3^n? a)1/12 b)1/81 c)1/243 d)1/15 If the sequence starts at n = 1 (there is no reason why it should) then it is 1/243

    asked by raven 31791
  78. science

    what is the tendency of an object to remain at rest or to remain in motion inertia

    asked by paris
  79. English

    I need help!! I have to do a research paper on "teenage Marijuana use and its effect on juvenile delinquency" and I can't find anything on it at all...I have to have reliable sources, not websites but things such as journals, google scholar, or government

    asked by Amy
  80. pre calc

    What is the fifth term of the sequence {2n - 1 / n}? a)4, b)14/5 c)7/4 d)9/5 assuming the first term is 1, and there is no good reason it should be, then 1,3/2, 5/3, 7/4, ...

    asked by raven 31791
  81. Science - Biology

    Which cell in the human body doesn't carry chromosomes? thx much. :) matured red blood cells do not have a nucleus in humans (and many other mammals).

    asked by Marisol
  82. Algera I

    I NEED HELP BIG TEST TOMORROW NEED THIS TO PASS And your question is?

    asked by G33
  83. wrtting process,english

    I can't find an actual website that will help me do correct format for citation with APA format for a powerpoint presentation. Here are all the APA websites I know of. Whatever format you use, you'll need to include the same types of information: author

    asked by kyln
  84. Opinions needed pls.

    Which types of body art do you believe would be acceptable in mainstream Canadian society? Does this make it "good"? Explain your opinion. Thnks. Without question, cosmetic surgery is acceptable in Canadian society. It comes in many forms. Face, torso,

    asked by May
  85. Algebra 2

    I am trying to factor a 4th degree polynomial that does not have any rational roots. I need to somehow get it factored into two quadratics. Anyway know of a method to use. 3x^4 - 8x^3 - 5x^2 + 16x - 5

    asked by Brenda
  86. chemistry

    percentage of error for experimental mole ratio, (1:3:1) along with theoretical ration (1:1:1:1:1) You need to clarigy what you want.

    asked by tori
  87. chemistry

    percentage of error for experimental mole ratio, (1:3:1) along with theoretical ration (1:1:1:1:1) answered below

    asked by tori
  88. Question! Pls answer

    Did ypu know that six Canadian prisons have tattoo shops? How would u explain this fact? Pls help. Thanks I didn't know that. But tattoos are very popular with many people now. The tattoo shops help train the inmates to make a living work in tattoo shops

    asked by May
  89. science

    How would you establish an effective ergonomics program? Since this is not my area of expertise, I searched Google under the key words "ergonomics program" to get these possible sources: http://www.cdc.gov/niosh/docs/97-117/

    asked by Mary
  90. PRE-ALGEBRA

    Y - 2X= -3 what do you want done to the equation?

    asked by JESSIE
  91. precalc sequence

    5-5^2 = 5-25 =-20 The fifth term is just when n=5 I believe. What is the fifth term of the sequence a sub n=5-n^2? a)-11 b)-20 c)-7 d)-5 I believe that the answer that fits the best is d, but I could be wrong

    asked by Rom
  92. Algebra

    for the matrix: { 1 -2 0} {-2 -1 1} { 0 0 -1} I found the eigenvalue to be -1 and +/- 5^1/2 Is this correct and can someone show me how to put the root 5 values as eigenvectors? Please and Thanks

    asked by Rom
  93. geography

    what is the population of the state nevada Thank you for using the Jiskha Homework Help Forum. Here is a site with the population of 2005. If you can find a more current Atlas, you might find a more current number:

    asked by Sifa
  94. Math

    Draw a polygon with area equal to 7.5 square units. Draw a triangle with a height of 3 and a base of 5. Since the area of a triangle is equal to (bh)/2 the area would be (3*5)/2 = 7.5 sq units

    asked by Derrick Small
  95. a

    For a fixed rate, a fixed principal amount, and a fixed compounding cycle, the return is an exponential function of time. Using the formula, , let r = 10%, P = 1, and n = 1 and give the coordinates (t, A) for the points where t = 0, 1, 2, 3, 4. Round your

    asked by Jade
  96. algebra

    For a fixed rate, a fixed principal amount, and a fixed compounding cycle, the return is an exponential function of time. Using the formula, , let r = 10%, P = 1, and n = 1 and give the coordinates (t, A) for the points where t = 0, 1, 2, 3, 4. Round your

    asked by Jade
  97. genetics

    when subcloning a gene and inserting it into a vector you normally would use x-gal to locate transformants if x-gal is not available what are the alternatives

    asked by steph