Questions Asked on
July 19, 2009

  1. Statistics (Poisson)

    Cars arrive at a toll booth according to a Poisson process with mean 80 cars per hour. How long can the attendant's phone call last if the probability is at least .4 that no cars arrive during the call. The book's answer is 23 seconds. That doesn't match

    asked by Sean
  2. math

    Four friends contributed money in the ratio 2:4:5:7.If the largest amount contributed was $1.40, calculate the total amount contributed by all four people?

    asked by keisha
  3. Chem

    I don't understand the effect of temperature on a reaction. For exmaple: CO + 3H2 CH4 + H2O deltaH= -230 KJ If there were an increase in temperature then the CH4 and H2O would have a harding time becoming the CO and H2 so therefore the reaction would move

    asked by Lena
  4. Chemistry

    Initially, 1.68 mol of PCl5(g) and 0.36 mol of PCl3(g) are in mixed in a 2.00 l container. It is later found that 1.44 mol of PCl5 are present when the system has reached equillibrium. Calculate the value of the equllibrium. This is what I did: Equation:

    asked by Lena
  5. math

    A ladder 9.00 m long leans against the side of a building. If the ladder is inclined at an angle of 75.0° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building?

    asked by melvin
  6. math

    A right triangle has a hypotenuse of length 3.00 m, and one of its angles is 30.0°. What are the lengths of (a) the side opposite the 30.0° angle and (b) the side adjacent to the 30.0° angle?

    asked by steven
  7. math

    are 1/2 and 4/10 equivalent fractions?

    asked by scooby9132002
  8. english

    Which of the following is not characteristic of the suras in the Koran? a. They are lyrical passages. b. They are written in rhymed Arabic verse. c. They emphasize the mercy of Allah. d. They emphasize the richness of life of earth. i think the answer

    asked by bindiya farswani
  9. algebra

    A parabola has x-intercepts at 3 and 7, a y-intercept at -21, and (5,4) for its vertex. Write the parabola’s equation

    asked by Sandra
  10. math

    Write the number in scientific notation. 0.000209 8,724,000,000

    asked by thomas
  11. Chemistry

    I actually posted this up before and Gk helped out but i don't understand the steps what do i enter for the pka for the first one? __________________________________________ I did an experiment on Buffers: In a polystyrene beaker, mix 20 ml of 0.1M Acetic

    asked by Saira
  12. world history

    9. What were the basic features of the major world belief systems? a. Hinduism b. Daoism c. Judaism d. Christianity e. Buddhism

    asked by Anonymous
  13. macroeconomics

    40.The purpose of indexing Social Security payments to the CPI is to 41. The best currently available measure of the standard of living in a country is ______. (Points: 3) the nominal GDP per capita the real GDP per capita the unemployment rate the growth

    asked by steven Sanchez
  14. Data Analysis

    I have a mathematical problem that I don't know how to solve in Excel, where might I go for help? Within excel where can i go?

    asked by Bryan
  15. Communication

    "I wanted to welcome you ASAP to our little family here in the States. It's high time we shook hands in person and not just across the sea. I'm pleased as punch about getting to know you all, and I for one will do my level best to sell you on America." How

    asked by Bernice Smith
  16. English IV

    The effect urban life has on the woman in the poem "Preludes" by T.S. Elliot is she: A. has become sophisticated. B. has developed wisdom. C. is depressed. D. is sordid and "dirty" like the city. I think it may be either B or C. 1 - The tone of the poem

    asked by Patrick
  17. COM 220 Axia college of University of Phoenix

    How are articles from the Opposing Viewpoints Resource Center of the University Library formatted? I have asked the instructor for help and it has gotten me nowhere. Please help me.

    asked by Purplerose
  18. macroeconomics

    A shift to the left of a supply curve is caused by: an increase in the number of sellers. a technological improvement. an increase in the cost of an input. an increase in the number of buyers.

    asked by steven Sanchez
  19. math

    Let 5a + 12b and 12a + 5b be the side lengths of a right-angled triangle and 13a + kb be the hypotenuse, where a, b and k are positive integers. Find the smallest possible value of k and the smallest values of a and b for that k

    asked by m
  20. math

    Find the number of solutions to the equation 2x + 5y = 2005, where x and y are positive integers

    asked by m
  21. 8th grade

    I wanted to welcome you ASAP to our little family here in the States. It's high time we shook hands in person and not just across the sea. I'm pleased as punch about getting to know you all, and I for one will do my level best to sell you on America.

    asked by Bernice Smith
  22. fractions

    i want to email you. please send email so i can send my math problems to you.

    asked by Daniel
  23. Chemistry

    0.500 mol of SO2, 0.100 mol of O2 and 0.700 mol of SO3 re intorduced simutaneously into a 1.00 L vessel at 1000 K. For the equillibirum, 2SO2 (g) + O2(g) 2SO3(g), the value of Kc at 1000K is 280. Show mathemtically that the mixture is NOT at equillibrium.

    asked by Lena
  24. Chemistry

    Please help! Thanks. An ammonia solution is made by diluting 0.105L of the concentrated commercial reagent until the final volume reaches 1.00L. What is the final molar concentration?

    asked by Sydney
  25. math

    The product of two numbers is 50. If you divide the larger number by the smaller number you get 2. What are the numbers?

    asked by chandice
  26. math

    Prove that a number 10^(3n+1) , where n is a positive integer, cannot be represented as the sum of two cubes of positive integers. thanx

    asked by m
  27. sci

    are radiocarbon dating and carbon-14 dating the same thing?

    asked by Lena
  28. Finance

    1. Is a fixed-price contract a good way to achieve the government’s goal of curbing rising costs? Explain. 2. What problems do you foresee if any, for the government if they choose to adopt a fixed-price contract methodology for research and development?

    asked by Gale
  29. algebra

    Solve problem. Telephoto lens. find the image distance i for an object that is 2,000,000 mm from a 250-mm telephoto lens. tel formula is 1/f=1/o + 1/i 1/250=1/2,000,000 + 1/i 5i(1/250)=(1/2,000,000 + 1/i)5i 1/50i = 5i/400,000i + 5i/5i 1/10i = 5i/80,000i +

    asked by Sandra
  30. Gen

    I need help finding info for the following.. Identify at least three different learning styles. i say online and I am drawing blank from there... Please help.. help with these too. Develop a strategy for effective communication and collaboration among

    asked by troyer0269
  31. Math

    The question is compute the value of the given expression. -|-15|-|21|. My answer is -36. Is this correct?

    asked by B.B.
  32. Math

    Write the negation of the following: A snowy day is cold. My answer is: A snowy day is not snowy. Is my answer correct?

    asked by B.B.
  33. math am i correct

    Multiply 3/5 times 25 Write your answer in simplest form. I also have to show my work it this correct? 3/5 times 25/1 15/1 = 15?

    asked by scooby9132002
  34. math

    how do you write 4 to the power of soemthing using microsoft word. Write 4 X 4 X 4 X 4 X 4 as a power of 4. I know the answer is 4 to the power of 5. I just don't know how to write it using microsoft word?

    asked by scooby9132002
  35. algebra

    Gasoline accounts for 85% of the motor fuel consumed in the United States every day. If 8,882 thousand barrels (bbl) of motor fuel are consumed each day, how much gasoline is consumed each day in the United States (to the nearest gallon)?

    asked by Anonymous
  36. math am i correct

    In the number 854,263,189, what number tells the number of millions? would the answer be 4 or 854?

    asked by scooby91320002
  37. english

    In "Abraham ad Isaac", what lesson is been taught to the reader? is it sacrifice and to obey God's orders? am i right?

    asked by bindiya farswani
  38. mathematics

    in f(x)=ln(x/x-1) how would you write an exporession for f^-1(x), where f^-1(x) denotes the inverse of f(x)

    asked by harry
  39. Chemistry

    a glavanic cell is set up by connecting the following half-cells together: nickle electrode in nickel nitrate solution and a copper electrode in copper nitrate solution. in which half-cell will oxidation occur? in which half-cell will reduction occur?

    asked by Cori
  40. Eco

    memo explaining the basics of how labor forces influence international business.

    asked by Tonie
  41. math am i correct.

    Write the number in expanded form. 2,378 is the answer? 2×1000+3×100+7×10+8×1

    asked by scooby9132002
  42. pre- algebra

    solve for x : 3 x = (96 -75)

    asked by reha
  43. pre- algebra

    solve for x : 3 x = (96 -75)

    asked by reha
  44. Data Analysis Help

    Arithmetic operations, cell references, and __________ can be used in Excel formulas. constants macros programs procedures is it A 2Using the mouse to select a specific cell is when creating a formula is called: sizing. moving. accessing. pointing. is it D

    asked by Bryan
  45. Math

    Put these numbers in increasing order: -2, 13, 0, -22. My answer is: -22, -2, 0, 13. Is this correct?

    asked by B.B.
  46. Math

    0.8/2 = p/10 p=4. Is this correct?

    asked by B.B.
  47. math

    Let 5a + 12b and 12a + 5b be the side lengths of a right-angled triangle and 13a + kb be the hypotenuse, where a, b and k are positive integers. Find the smallest possible value of k and the smallest values of a and b for that k

    asked by m
  48. math

    : Hi helper, thanks for the help, this website is very good and it would not of been possible without your assistance. Here is a question i would like you to solve for me this time ....................................... let ABC be a triangle. Two straight

    asked by m
  49. ap world

    Which of the following statements about early Amerindian peoples is true? a economic and political rivalries led to nearly constant conflict among various groups b they relied heavily on the wheel and an impressive network of roads c seafaring knowledge

    asked by Anonymous
  50. mathematic

    if f(x)=cos(5x) find f(pie/4)

    asked by matthew
  51. STATISTIC

    What is the signal change of 58 with the distributed mean of 35,standard deviation 10, using .o1 level

    asked by JACKSON
  52. algebra

    Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour, and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office

    asked by bev
  53. Skill for Learning in a Information Age

    how will tone or writing style ,change based on the different type of people you will be communicating with

    asked by Marion
  54. world history

    1. The armistace of November 11, 1918, brought to an end almost four years of humans killing humans. It was great that the war was over. Many people had a difficult time adjusting though. What was post-WWI Canadian society like? Your answer should include

    asked by Bob Zhou
  55. pre algebra

    - 2 + 5 = +3

    asked by ethan
  56. Riddle

    What is open when it's closed

    asked by Mary
  57. (math ) for mathmate

    Can you show me how to just work for the 1st one and i will try and take it from there?

    asked by keisha
  58. Chemistry

    I am suppose to name alkanes, but I don't know how to do it, if possible to give me an example on how to do it, but here is one of the questions I have to do. CH3-CH-CH2-CH3 | CH3

    asked by Cori
  59. essay writing

    what were the speakers arguments and counterarguments in charles foster kane speech

    asked by jade
  60. operating system

    Generate a set of test inputs and expected results for the currency conversion program

    asked by Anonymous
  61. Health

    Final Project: Health Care Roles in Communication Knowing how to communicate in all health care roles is important. There are many areas of health care, so a diverse understanding of each will not only help you as a health care employee, but will also help

    asked by Kristy
  62. macroeconomics

    Households derive income from ______.

    asked by steven Sanchez
  63. Chemistry

    Hydrolysis of Salt: Using the universal indicator we had to determine the pH of potassium chloride, and the results i got was pH- 7.5 . Now i have to explain this with a equation to show hydrolysis. I dunno how to write it out, but i think KCL should be

    asked by Saira
  64. AP world

    Which of the following statements about early Amerindian peoples is true? a economic and political rivalries led to nearly constant conflict among various groups b they relied heavily on the wheel and an impressive network of roads c seafaring knowledge

    asked by Anonymous
  65. math

    (x^n)/y^(1/2)

    asked by thomas
  66. math

    do you think you could explain to me which of these are not a function and why? 1.{(x,y)|y=cosx} 2.{(x,y)|x=y} 3. {(x,y)|y=3^x} 4.{(x,y)|x=3}

    asked by thomas