# Questions Asked onJuly 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

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?

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

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:

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?

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?

7. ## math

are 1/2 and 4/10 equivalent fractions?

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

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

10. ## math

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

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

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

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

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?

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

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

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.

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.

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

20. ## math

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

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.

22. ## fractions

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

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.

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?

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?

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

27. ## sci

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

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?

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 +

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

31. ## Math

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

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?

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?

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?

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)?

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?

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?

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)

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?

40. ## Eco

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

41. ## math am i correct.

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

42. ## pre- algebra

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

43. ## pre- algebra

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

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

45. ## Math

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

46. ## Math

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

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

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

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

50. ## mathematic

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

51. ## STATISTIC

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

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

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

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

- 2 + 5 = +3

56. ## Riddle

What is open when it's closed

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?

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

59. ## essay writing

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

60. ## operating system

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

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

62. ## macroeconomics

Households derive income from ______.

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

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