1. speech

    A hypothetical example is: A. a false example. B. not real but can happen. C. an example used to prove a hypothesis. D. has no place in a speech.

    asked by Anonymous on July 7, 2013
  2. US Government

    Explain why this is false. The most striking change in the U.S. government has been the decrease in the scope of its activities.

    asked by Emma on September 7, 2009
  3. Childhood Education

    Low achievement and academic accompy are appropriate for non English speaking preschoolers. I am think false.

    asked by Betty on September 1, 2018
  4. Senses- Science Grade 7

    The semicircular canals sends impulses to the cerebellum? If false what is the correct answer? I do not know.

    asked by rawr... im a dinosaur.... rawr on October 29, 2012
  5. math

    0is larger than every negative integer.Is it ture or false.Give reason.

    asked by ra ny on September 28, 2008
  6. 6th grade

    the process of grouping of objects at random is called classification.whether ture or false.

    asked by ra ny on November 13, 2008
  7. world history

    with regards to the mining and agriculture industry,in the nineteenth century,whichof the following statement is false?

    asked by roger on May 6, 2012
  8. english

    here are some questions i had to answer for the story "The Other Wife" by Colette (translated by Margaret Crosland) [[it starts with 'for two?' and ends with 'superior women']] please check them all 1. marc seguy insists on sitting in the crowded area of

    asked by y912f on July 2, 2009
  9. 6th Grade History

    Questions: 1) a priest who brought Christianity to Ireland 2) a separation of the two most important branches of Christianity 3) from this country monks traveled the continent of Europe establishing monasteries. name the country? 4)an iconoclast, or image

    asked by ☻i♥zee☻ on March 30, 2012
  10. English

    Why do you go to a museum? I go there to watch works of art. I go there to look at works of art. I go there to see works of art. I go there to enjoy watching pictures. I go there to see the works of famous artists. (Are the answers all grammatical? Would

    asked by rfvv on March 5, 2010
  11. Math

    An isosceles triangle is inscribed inside a circle of radius 12 metres. Its height is increasing at a rate of 2 m/sec. At the instant when the height of the triangle is 18 m, at what rate a) its area changing? b) its perimeter changing? The answers are

    asked by Buzz218 on October 16, 2016
  12. Math 30-1

    1) Determine the approximate measure of all angles that satisfy the following. Give answers to two decimal places. Use diagrams to show the possible answers. a) cos θ = 0.42 in the domain -π ≤ θ ≤ π b) tan θ = -4.87 in the domain - _ π 2 ≤ θ

    asked by Izz on October 31, 2017
  13. TO MS SUE

    Please check my answers to my question, I posted this question before but no one answered or helped me. All I need is for someone to check my answers :)

    asked by Bella on September 25, 2014
  14. Math, Can someone check my answers?

    Can someone please check my answers? Tell whether the given equation has the ordered pair as a solution. 11. y = 6x;(3,16) 13. y = -4x; (-2,8) 15. y = x - 3/4; (2,1 1/4) Answers: 11. Not a solution 13. Has a solution 15. Has a solution

    asked by Phoebe on October 31, 2014
  15. English

    I have misplaced my answers to Word Within the Word #6 Analogies. If someone knows the answers so that I do not have to redo the analogies, please post them here.

    asked by E on January 15, 2015
  16. 6th grade geography, France

    which african nation lies to the south of Spain, across the Strait of Gibraltar? ghana. nigeria, morocco, egypt which of the following is NOT true of Spain's climate? a. due to its high elevation, the Meseta in central spain has an extremely wet climate.

    asked by i♥zee on April 3, 2012
  17. math

    what is the mode of this set of numbers:13,11,7,9,12,5 i don't think there is a mode, because no number occurs more than once. you might want to look up what mode is. ther's no damn mode umm..yur dumb "SOORY"

    asked by Anonymous on February 12, 2007
  18. Maths

    The slope of a curve Y = f(x) is given by dy/dx=(X-1)(x-2)^2(x-3)^3(x-4)^4(x-5)^5. (a) For what value or values of x does y have a local maximum/minimum? Justify your answer. I know the maximum/min occurs when dy/dx = 0, which in this case is 1,2,3,4,5 but

    asked by Ss on October 19, 2014
  19. Calculus (first year uni)

    Hello lim x->pi^- for cot(x) [In words,this is the limit of x as it approaches pi from the negative direction for the function cot(x). I am very confused as to how this occurs and turns out to be negative infinity. Thanks.]

    asked by Anthony on September 27, 2013
  20. Geology

    The warmest temperature occurs when? and why does the warmest daily temperature occur in mid-to-late afternoon rather than at the time of the highest sun angle?

    asked by Pepper on March 9, 2009
  21. chemistry

    the autoionization of water, as represented by the equation below, is known to be endothermic. What can be correctly said of what occurs as the temperature of water is raised?(please explain) H2O(l)+H2O(l)H3O+(aq) + OH-(aq)

    asked by Anonymous on April 23, 2014
  22. Calculus

    Use the given derivative to find all critical points of 'f' and at each critical point determine whether a relative maximum, relative minimum, or neither occurs. Assume that 'f' is continuous everywhere. f' (x) = (1-2x)/ ∛(x+3)

    asked by Roy on November 29, 2010
  23. chemistry

    write a balanced equation for the reaction that occurs when an aqueous solution of iron(II) chloride is mixed with an aqueous solution o potassium hydroxide.

    asked by Lili on October 16, 2008
  24. New holy ganges public school (Khagaria , bihar)

    In a class test 5 marks are given for every correct answer and ( - 2 ) marks are given for every incorrect answer and no marks for not attempting any question. C scores ( - 5 ) marks by attempting 13 questions. How many questions has C attempted correctly

    asked by Atul kumar on September 10, 2015
  25. Science

    Approximately how long does an earhquake P-wave take to travel the first 6500 kilometers after the earthquake occurs? a. 6.5 min b. 8.0 min c. 10.0 min d. 18.5 min

    asked by Angie on March 25, 2009
  26. calculus

    c(t) = t^3 * 2^(-t/2) Find the initial concentration c(0) at time t=0 min. Finds the maximum concentration of the dye sand the time when this occurs.

    asked by Anonymous on April 20, 2010
  27. Algebra 2

    when expanding (x+y)^8, either an x or a y from each of the eight factors is used in the product. That means that x^3y^5 is going to occur several times and the number of times it occurs becomes the coefficient for x^3y^5. Based on this, what is the

    asked by Anonymous on July 2, 2013
  28. Calculus

    The concentration of a drug in a patient's bloodstream t hours after it is taken after it is taken is given by C(t) = 0.016t/(t+2)^2 mg/cm^3 Find the maximum concentration of the drug and the time at which it occurs.

    asked by vivi on February 13, 2013
  29. Chemistry

    what occurs when sugar is added to water.... It dissolves? the freezing point of the water will decrease and the boiling point will increase Thanks for your help i think i get it better now That't right.

    asked by Kat on March 27, 2007
  30. Calculus

    The concentration of a drug in a patient's bloodstream t hours after it is taken after it is taken is given by C(t) = 0.016t/(t+2)^2 mg/cm^3 Find the maximum concentration of the drug and the time at which it occurs.

    asked by vivi on February 13, 2013
  31. science

    Potential to Kinetic or Kinetic to Potential. Describe an example of energy conversion that occurs during the activity. Playing in a rock band?

    asked by Anonymous on December 4, 2009
  32. math

    1.Glenn bought a car for Php600,000. The yearly depreciation of his car is 10% of its value at the start of the year. What is its value after 4 years? A. Php437,400 B. Php438,000 C. Php393,660 D. Php378,000 2. During a free-fall, a skydiver jumps 16 feet,

    asked by miles on June 27, 2015
  33. math formulas needed

    Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do

    asked by Tom 12 on June 18, 2013
  34. Stats: Joint Density Function

    Let the joint density function of X and Ybe given by: f(x)={kxy^2 for 0

    asked by Stephanie on October 18, 2006
  35. English

    How do you call a meeting of teachers headed by the school principal? Thank you. I need to include the correct word in the following sentence. 1) I really hope that the teachers' conference will approve/welcome/agree with/ the decision of a partnership

    asked by Henry2 on November 1, 2011
  36. trig

    Find all solutions to the following triangle. (Round your answers for angles A, C, A', and C' to the nearest whole number. Round your answers for sides c and c' to two decimal places. If either triangle is not possible, enter NONE in each corresponding

    asked by janice on November 16, 2012
  37. gilbert

    1.find the value of X. Simply answers that are radicals. hypotenuse is 10 sides (legs) are 6 and x. the total base is 12. 2. Find the area of the figure. Round decimal answers to the nearest tenth. sides of the triangle is 8 cm and total base is 7 cm

    asked by maria on February 24, 2009
  38. AP CALC. AB

    Let h be a function defined for all x≠0 such that h(4)=-3 and the derivative h is given by h'(x)=(x^2-2)/(x) for all x≠0 a). Find all values of x for which the graph of h has a horizontal tangent, and determine whether h has a local maximum, a local

    asked by Darcy on December 3, 2014
  39. Algebra-Reiny please explain this

    Hi Reiny, I posted this problem earlier and you responded but I don't get the reasoning- The problem was -2log8(x+1) = -8 you said multiply by -2 and then you put log8(x+1)=4(wasn't that dividing by -2) log8(x+1)^2 = 8 (how did you get to the power of 2

    asked by Anna on December 14, 2010
  40. Chemistry

    Can someone please help me solve this homework problem for my chemistry class.It's my last problem and I'm stuck!:/ Thanks :) A 4.0*10^1kg sample of water absorbs 308KJ of heat. If the water was initially at 25.5 C, what is its final temperature?

    asked by Eliza on September 17, 2012
  41. religious study

    What is “the problem of evil,” and why is it particularly problematic for Western, monotheistic religious traditions? I am able to address "the problem of evil"; however, I do not know the second part of the question; can someone kind enough to give me

    asked by Nathan on December 5, 2010
  42. retail pharmacy assistant

    when a customer has a complaint the pharmacy assistant should ? a.apologize and hope no one notices b.try to rectify the problem without telling anyone c.report the problem to the pharmacist d.assume that the customer is in error my answer is c

    asked by susue on July 29, 2013
  43. Math

    I need help with the following problem: Directions: Express each answer in simplest form in terms of the given variable. Problem: An angle has measure Xº. Find the average of the measures of a complement and a supplement of the angle.

    asked by David on August 21, 2007
  44. Algebra

    This is a two part question, make sure you answer both parts: In the following subtraction problem the letters A, B and C stand for three different digits ( There are not any other operations involved in this problem). What digits should replace each

    asked by Joe on October 22, 2017
  45. Chemistry

    The energy (in joules) of an electron energy level in the Bohr atom is given by the expression: En = -2.179 x 10-18/n2 J where n is the principal quantum number for the energy level. What is the frequency in Hz of the electromagnetic radiation absorbed

    asked by Andy on October 21, 2013
  46. Physics

    Can someone explain to me how I can solve this problem? This problem contains multiple parts but I'm stuck on the last two. Here is the full problem: A block of mass 2.5 kg is sliding at 10 m/s on an initially frictionless, horizontal surface. There is

    asked by Bella on November 22, 2018
  47. Math

    Write two different multiplication problems that use the factors 4 & 5. Make one problem about arrays. Make the other problem about TIMES AS MANY.

    asked by Shaan on September 14, 2012
  48. calculus

    I am working on this problem and having some trouble. We're supposed to use partial fractions. The problem is: integral of dx / (x^6-1) . I got the values of A and D, but I am having trouble with the others. Help please!

    asked by Liz on January 23, 2009
  49. BUSINESS COMMUNICATION

    i had another problem concerning business communication.well i would like to know what are the effective use of external communication??i'm having problem on this question..i would be very grateful if someone can help me on it. Thank you in advance!

    asked by Taskeen on November 26, 2011
  50. Chemistry

    Convert 355.3 kg to tons. I start the problem: 355.3 kg to 1 kg then 1 x 10 to the third power, then I have 1g. My problem is that I don't know what to do with my 1 g. What is the next step?

    asked by Rachel on October 2, 2013
  51. college physics

    how can i find heat capacity of silver without there being a temperature in the problem the problem only lists the mass of the silver

    asked by maxie j on April 22, 2010
  52. Algebra

    I'm really lose with this problem...HELP Using Cramer Rule If D=O use another method to solve 2x/3-5y/2=3/2 -x/4+5y/2=7/2 I don't know where to begin on how to solve this problem.

    asked by Gwendolyn on September 17, 2011
  53. history

    describe the moral climate in the 1920's. Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. If there's not a tutor with this specialty online right now, be

    asked by Tiffani on August 1, 2007
  54. math,correction

    Problem #1 subtract. Express your answer in simplest form (3x)/(18) minus (x)/(18) MY steps: (3x-x)/(18) = (2x)/(18) and answer: (2x)/(18) Problem #18 write in simplest form. (3x^5)/(15x^12) My steps: (3)/(15) = .60 x^5-12 = x^-7 so my answer is: .60x^-7

    asked by jasort20 on March 18, 2007
  55. CRT/205 Final

    I have two separate arguments and I am wondering if these answers are appropriate for the questions 1. State one argument made by the author. “Adoption should be advocated as an alternative to abortion for women experiencing an unwanted pregnancy”

    asked by Linda on October 16, 2009
  56. Fluid Mechanics

    Consider the 2D, incompressible, steady flow between parallel walls, the bottom wall is stationary and the top one is moving at a constant velocity Uw. The pressure is constant. Assuming the flow is fully developed (i.e. independent of x), we can write

    asked by Alex on October 11, 2013
  57. English

    1. The problem is so difficult that I cannot solve it. 2. The problem is too difficult for me to solve. 3. It is too difficult for me to solve the problem. (Are the three sentences the same? Do they come from the same structure? Can we omit 'that' in

    asked by rfvv on May 3, 2010
  58. Physics

    In 1989, Carl Lewis established a world record when he ran the 100 meter dash in 9.92 seconds. What was his average speed(in m/s) for the race? Remember to include your data, equation, and work when solving this problem. I am not sure how to do this

    asked by Jake on March 30, 2009
  59. Physics

    First, I'm sorry for asking a lot of questions, however I don't know how to solve any of these problems. Can you please help me by telling me how I should solve it and what formulas should be used? I don't want the actual answers but how to solve these

    asked by Stephanie on December 9, 2018
  60. Physics

    The space shuttle releases a satellite into a circular orbit 440 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

    asked by Tatiana on October 12, 2010
  61. Biology

    If there is crossing over between two gene loci A and C occurs in 20% of the tetrads and between C and B in 10% of an individual of genotype ACB/acb, what would be the percentage of gametes of double cross over types (AcB/aCb) ?

    asked by Mini on March 5, 2018
  62. statistics

    Compare the 95%(6.214,7.686) and 99% 95.944,7.956)confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.

    asked by Lisa on December 9, 2012
  63. statistics

    Compare the 95%(6.214,7.686) and 99% 95.944,7.956)confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.

    asked by Lisa on December 9, 2012
  64. physics

    a .140 kg baseball is dropped from rest from a height of 2.2m above the ground. it rebounds to a height of 1.6 m. what change in the balls momentum occurs when the ball hits the ground

    asked by vicki on February 23, 2011
  65. college physics

    The space shuttle releases a satellite into a circular orbit 550 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

    asked by Anonymous on February 22, 2010
  66. physics

    The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

    asked by angela on October 11, 2010
  67. physics

    a .140 kg baseball is dropped from rest from a height of 2.2m above the ground. it rebounds to a height of 1.6 m. what change in the balls momentum occurs when the ball hits the ground?

    asked by vicki on February 22, 2011
  68. british literature

    Dramatic irony occurs when a reader or an audience notices something that a character in the story or play does not know.what would the dramatic irony be in Twelfth Night,at least two examples for my essay.

    asked by trish on March 5, 2010
  69. PHYSICS ---HELP!

    The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

    asked by lauren on October 11, 2010
  70. physics

    The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs? V = m/s ??

    asked by angela on October 11, 2010
  71. PHYSICS ---HELP!

    The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

    asked by Jen on October 11, 2010
  72. physics

    can you check this : a repelling force occurs between two charged objects when the charges are of a. unlike signs b. like signs c. equal magnitude d. unequal magnitude i chose B

    asked by physics on March 14, 2009
  73. Physics

    Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic?

    asked by Mary on March 27, 2011
  74. Physics

    Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic?

    asked by Mary on March 27, 2011
  75. World History

    All are True/False 1. After WWI, Ho Chi Minh tried to get the U.S. to support independence for Vietnam. 2. Ho Chi Minh's forces and the U.S. were allies during WWII. 3. America's First direct involvement in Vietnam came during the Johnson administration.

    asked by Destiny on May 2, 2012
  76. Physics

    Ok so this is just a small understanding problem, I do not want you to actually help me solve the problem, here it goes: A cylinder with mass 3kg slides on ice with its base surface at 5m/s and collides with an identical but stationary cylinder. The

    asked by Alex on July 18, 2016
  77. To heather =(

    Your post has been removed. We do not have access to any school's materials or exams. Even if we did, we certainly would NOT post the answers. You are no credit to Penn Foster! Check these sites for Penn-Foster's cheating policies.

    asked by Writeacher on January 14, 2011
  78. math

    a pilot entering a bay on course 60.3 degrees at the speed of 12 knots sees a light bearing 37.3 degrees true, and 20 mins later he sees it bearing 20 degrees true. if he keeps the same course and speed,(a)when will he be nearest to the lighthouse and how

    asked by rhinechilde on August 27, 2014
  79. trigonometry

    a pilot entering a bay on course 60.3 degrees at the speed of 12 knots sees a light bearing 37.3 degrees true, and 20 mins later he sees it bearing 20 degrees true. if he keeps the same course and speed,(a)when will he be nearest to the lighthouse and how

    asked by rhinechilde on August 27, 2014
  80. trigonometry

    a pilot entering a bay on course 60.3 degrees at the speed of 12 knots sees a light bearing 37.3 degrees true, and 20 mins later he sees it bearing 20 degrees true. if he keeps the same course and speed,(a)when will he be nearest to the lighthouse and how

    asked by rhinechilde on August 26, 2014
  81. math- help needed badly

    a pilot entering a bay on course 60.3 degrees at the speed of 12 knots sees a light bearing 37.3 degrees true, and 20 mins later he sees it bearing 20 degrees true. if he keeps the same course and speed,(a)when will he be nearest to the lighthouse and how

    asked by rhinechilde on August 28, 2014
  82. physics

    Calculate the change in internal energy of 2kg of water at 90 degree Celsius when it is changed to 3.30m3 of steam at 100oC . The whole process occurs at atmospheric pressure. The latent heat of vaporization of water is 2.26×106J/kg

    asked by NDuka on December 4, 2013
  83. phy

    Calculate the change in internal energy of 2kg of water at 90 degree Celsius when it is changed to 3.30m3 of steam at 100oC . The whole process occurs at atmospheric pressure. The latent heat of vaporization of water is 2.26×106J/kg

    asked by christ on January 25, 2013
  84. Health

    This type of auto-immune disease occurs when the immune system attacks the layer of insulation that surrounds the nerves and slows nerve impulses. A. asthma B. allergies C. multiple sclerosis D. rheumatoid arthritis

    asked by Sinistare Stewie on December 11, 2015
  85. physics

    A galvanometer best makes use of the fact that there exists a magnetic field in which of the these?. A) about aligned magnetic domains.B) wherever a change of voltage occurs.C) about a current-carrying wire.D) between the poles of a U-shaped magnet.E)

    asked by Jim on April 14, 2012
  86. phy

    Calculate the change in internal energy of 2kg of water at 90 degree celcius when it is changed to $3.30m^{3}$ of steam at $100 ^{o}$C. The whole process occurs at atmospheric pressure. The latent heat of vaporization of water is $2.26\times10^{6}$ J/kg.

    asked by Emma on March 19, 2015
  87. physics

    is anyone aware of evidence (preferably experimental evidence) in support of time dilation. in other words proof that it actually occurs. that is, experiments other than the one of Hafele and Keating. i just need a starting point for some research.. just a

    asked by frank on January 10, 2010
  88. Chemistry

    Write the net ionic equation for the reaction that occurs when aqueous solutions of barium hydroxide and hydrobromic acid are combined. I know that the first part of the formula would be BaOH + HBr but I do not know what the product would be since HBr is

    asked by Hannah on October 9, 2011
  89. Chemistry

    Write a net ionic equation for the overall reaction that occurs when aqueous solutions of potassium hydroxide and carbonic acid are combined. KOH + H2CO3 = KCO3 + H30 K^+(aq) + OH^-(aq) + h2CO3 (aq) = K^+(aq) + CO3^2+(aq) + H3O(aq) Is this correct so far?

    asked by Hannah on October 22, 2011
  90. Algebra-Please check

    1. solve sqrt (11-x) = sqrt(x-7) choices are 6,7,8 or9 I think according to my calcs the answer is (9) The range of f(x) = sqrt(3x-6) - 2 answers would be y= (-2) y> (-2) y

    asked by Erica on January 8, 2011
  91. math

    A graph is given with the line going from (-2, 2) to (2,8). a) Find the length of this line. b) Find the midpoint of the line. c) write an equation for this line. my answers- a) 2√10 b) 0,5 c) y = 1.5x + 5 please check these answers.

    asked by Anonymous on May 31, 2013
  92. Math

    I am having a little trouble figuring this problem out if someone could help I would appreciate it. Question: The angle of elevation to the top f a tree sighted from ground level is 19degrees. If the observer moves 60 ft closer, the angle of elevation from

    asked by Pam on July 22, 2016
  93. English Lit-Please help

    We had to read An Essay on Criticism by Alexander pope and answers some questins. I spent my weekend trying to figure out one of the questions-Could someone please help "Those Rules of old discover'd, not devis'd Are Nature still, but Nature Medthodiz'd

    asked by Jody on February 20, 2012
  94. math

    The principal of Valley Elementary School wants to divide each of the three fourth-grade classes into small same-size groups with at least 2 students in each. If the classes have 18, 24, and 36 students, respectively, what size groups are possible?

    asked by zac on December 21, 2012
  95. HUM/176

    in my assignment it asks me to compare and contrast information in the news stories as well as how they are presented. It also asks to answer the following questions, what links are included and how does the commentary associated with the stories and

    asked by sandi on March 6, 2011
  96. Elementary Statistics

    Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.

    asked by KAOS on October 15, 2012
  97. Math

    Find the total profit, the maximum value of the total profit, and the value of x at which it occurs when the revenue is given by R(x)=240x-x^2 and the cost is given by C(x)=5000+8x.

    asked by Pam on February 24, 2014
  98. I really need help in science please anyone thanks

    Since fermentation occurs in the cytoplasm of yeast cells explain the role of mitochondria in yeast cells ? If anyone can help me this I will truly be graceful

    asked by Mike on December 14, 2012
  99. Science 2 questions

    how and where is electricity generated in British Columbia, Canada? describe how most of the electricity is generated in England or another country. But it must be different than what occurs in B.C. Please help, thanks:)

    asked by Olly on April 9, 2013
  100. Economics

    I know that Market Failure occurs when markets lead to inefficiency. But what are the reasons that cause Market Failure? please explain in detail.

    asked by Stosur on August 28, 2012