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Questions Asked on
June 3, 2011

  1. Physics!

    The two stars in a certain binary star system move in circular orbits. The first star, Alpha, has an orbital speed of 36 km/s. The second star, Beta, has an orbital speed of 12 km/s. The orbital period is 137 d. a) What is the mass of the star alpha? b)

    asked by Allison

  2. statistics

    It is claimed that an automobile is driven on the average more than 20,000 kilometers per year. Random sample of 10 automobile owners are asked to keep a record of the kilometers they travel. If the sample mean and standard deviation of automobile driven

    asked by Ali

  3. TRIGO

    Find the minimum value of 9Tan^2x + 4Cot^2x.

    asked by anandi

  4. math

    You receive an invoice for $565.00 with terms 3/10, net 30. If you pay it immediately, how much will you pay? A. $548.05 B. $551.25 C. $558.05 D. $559.95

    asked by K

  5. peresonal finance

    how does education plays a critical role in financial success

    asked by brittany

  7. Physics - pulley

    A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.5 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. I have

    asked by Casey

  8. maths

    a trapezium with its parallel sides in the ratio16:5,is cut from a rectangle whose sides measure 63m &5m respectively. the area of the trapezium is 4/15 of the rectangle .find the lengths of the parallel sides of the trapezium.

    asked by YASH

  9. Physics

    In the radioactive formula, 235 U → 235 Np = X, what does X represent 92 93 A. An alpha Particle B. A positron C. An electron D. A gamma ray Please help ASAP!!! Thank you very much!!

    asked by J. J.

  10. Physics

    Please help I've attempted this problem various ways and I can't seem to get the correct answer. A 69.0 kg person throws a 0.0410 kg snowball forward with a ground speed of 35.0 m/s. A second person, with a mass of 60.0 kg, catches the snowball. Both

    asked by Kristen

  11. Composition

    Can you please check this for any grammatical errors? Thank you for your help. Having been out of school for 15 years, I seem to have forgotten the fundamentals of grammar. Taking Composition and Communication 155 has helped me gain a better understanding

    asked by Tori

  12. Chemistry

    Redox reaction of cl2 --> cl ion and clo2- I split it up into two half reactions cl2-->2cl- and cl2-->2clo2-

    asked by Amy

  13. Math

    What are the steps to getting the tan of 345degree, without the use of a calculator?

    asked by Juan

  14. chemistry

    a sample of a radioisotope had a mass of 100.0 grams. After exactly 24 days, 6.25 grams remained. The half life of the isotope is _________

    asked by rick

  15. Physics

    Find the final velocity of the two balls if the ball with velocity v2i = -19.5 cm/s has a mass equal to half that of the ball with initial velocity v1i = +26.8 cm/s. PLEASE HELP IVE TRIED EVERYTHING!!!

    asked by Kristen

  16. statistics

    A certain geneticist is interested in the proportion of males and females in the population that have a certain minor blood disorder. In a random sample of 1500 males, 75 are found to have disorder, whereas 80 of 2000 females appear to have disorder. Find

    asked by Ali

  18. statistics

    Among the 500 first year students of college, 270 students study computer science, 345 students study mathematics, and 175 students study both computer science and mathematics. If one student is selected at random, find the probability that he did not take

    asked by masaad

  19. acc 121

    Bob is investing in a partnership with Andy. Bob contributes as part of his initial investment, Accounts Receivable of $80,000; an Allowance for Doubtful Accounts of $12,000; and $8,000 cash. The entry that the partnership makes to record Bob's initial

    asked by moe

  20. Psy

    you see with your brain not with your eyes Defend this statement with reference to the Young-Helmholtz theory of color vision and the optic disc

    asked by Tia

  21. Physics

    Please help I've attempted this problem various ways and I can't seem to get the correct answer. A 69.0 kg person throws a 0.0410 kg snowball forward with a ground speed of 35.0 m/s. A second person, with a mass of 60.0 kg, catches the snowball. Both

    asked by Kristen

  22. Geometry

    A 10-meter ladder, is resting against the top of a building. If the bottom of the ladder is 4 meters from the building, how many meters tall is the building

    asked by Terrence

  23. statistics

    5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics? Using a

    asked by neil

  24. Algebra

    The average of two test scores is 79. If one test score is eleven less than the other, what are the two test scores?

    asked by Steve

  25. English

    Can you please check these sentences for me, please? Thank you very much. 1) The word Victorian derives from Queen Victoria, who ruled constitutionally for more than half a century, from 1837 to 1901. 2) The Victoria Age was a complex area characterized,

    asked by Henry1

  26. Physics

    What daughter isotopes are produced when a neutron combines with a nucleus of 235/92 U? Assume that three neutrons are also produced in the reaction. A. 140/56 Ba, 95/36 Kr B. 142/56 Ba, 93/36 Kr C. 140/56 Ba, 93/36 Kr D. 141/56 Ba, 94/36 Kr Please help.

    asked by Anonymous

  27. Statistics

    Under what circumstances does the sampling distribution of the proportion approximately follow the normal distribution?

    asked by Dan

  29. chemistry

    When performing a titration, 23.65 mL of 1.25 M calcium carbonste was used to neutralize 9.68 mL of HCl. What is the concentration of the HCl solution? (Create a balanced equation first)

    asked by lexi

  30. busness math

    two vendors are competing for your busness.vendor A is offering you a 6/8/12 discount and vendor B is offering a discount of 7/9/10.what is the single equivalent discount being offered by each vendor(round to the nearest hundredth percent)

    asked by Ron

  31. bio 151

    Describe where EPSP is produced, and explain how it is produced. What is its significance?

    asked by Tia

  32. business communication

    You can't qualify for a Home Beautiful credit card until you are 18 years old." Indicate the alternative that both correctly evaluates the sentence and correctly explains the reason for the evaluation. (Points: 5) Good you-attitude because it begins with

    asked by Anonymous

  33. Math

    The segment that bisects an angle of the triangle and has one endpoint at a vertex of the triangle and the other endpoint at another point on the triangle is called the _________. The segment that has one endpoint at one of the vertices of a triangle and

    asked by Sabrina

  34. accounting

    Required a. Determine the gross profit margin for each product produced based on the ABC data [(selling price 2 ABC cost per foot) 3 feet produced]. b. Determine the gross profit margin for each product produced based on the traditional costing data

    asked by Maria

  35. Trigonometry

    Find all solutions on the interval (0,2pi): 2-2cos^2=sinx+1

    asked by Help needed!

  36. arithmetic

    If a:b:c=2:1:3 and 2a-3b+c=8 then a+b+c is

    asked by Anonymous

  37. statistics

    A population of scores forms a normal distribution with a mean of µ = 40 and a standard deviation of SD = 12. a. What is the probability of randomly selecting a score less than X = 34?

    asked by Anonymous

  38. English

    Can you check this sentence, it's really urgent. Before sending you details of my credit card, I would like you to confirm the offer made to me by Mr Smith, your Reservation Executive.

    asked by Henry1

  40. first aid

    Two thin rectangular sheets (0.09 m 0.54 m) are identical. In the first sheet the axis of rotation lies along the 0.09-m side, and in the second it lies along the 0.54-m side. The same torque is applied to each sheet. The first sheet, starting from rest,

    asked by Anonymous

  41. Algebra

    Can someone check my answers? 1. 3/c - 4/3c = 5/3c 2. -3t/t-4 - 2t+4/4-t = -2t-4/t-4 3. z/3z^2 + 4/7z = 19/21z 4. 5x/2x-6 + x+2/3-x = 4x-2/2x-6 or 2(2x-1)/2(x-3)

    asked by Michelle

  42. college algebra

    How would you factor th trinomial 42h^2-29hj-5j^2

    asked by Tiara

  43. English

    In the book To Kill A Mockingbird, What is the most important life lesson that Jem and/or Scout learn?

    asked by TKAM

  44. Physics

    In the radioactive formula 235 U → 235 Np + X, what does X represent 92 93 A. An Alpha Particle B. A positron C. An electron D. A gamma ray Please help ASAP!!! Thank you :D

    asked by J. J.

  45. math

    what % of $720.00 equals $157.00

    asked by Anonymous

  46. maths

    what does 4.8828125 round to?

    asked by tess

  47. math

    a 31'' diameter circle has an area of _ sq ft. ???

    asked by jay

  48. math

    a 31'' diameter circle has an are of _ sq ft.????

    asked by jay

  49. algebra

    express as an equivalant expression that is a single logarithmic and simplfy if poissible loga(2x+10)-loga(x^2-25)

    asked by mema

  51. Algebra

    The speed of a passenger train is 20 mph faster than the speed of a freight train. The passenger train travels 250 miles in the same time it takes the freight train to travel 150 miles. find the speed of each train.

    asked by Francessca

  52. maths year 7

    can u give me some help on recipicol fractions?

    asked by who wants 2 no?

  53. Math - Domain of Composite function

    Find the domain of the composite function f ₒ g . Please show all of your work. f(x) = √x; g(x) = 2x + 12

    asked by CheezyReezy

  54. Chemistry

    The ksp of aluminum hydroxide is 5.6e-17. What is the concentration of hydroxide in a saturated solution?

    asked by Kat

  55. business communication

    What are three examples of bias in business writing? Identify two methods you consider important to follow in reducing bias in business writing

    asked by Anonymous

  56. business

    As the new finacial controller of a meduim-sized manufacturing company, you quickly need to assess the company's finanical position. Explain the process you would work through and the documents you would review. also state which of you new colleagues you

    asked by Antonio

  57. Chemistry

    2 L(g) + An(aq) + 3 Gw(s) + 2 I(g) 2 Gd(aq) + 3 A(g) + Y(s) What direction would the reaction shift if the volume of the container was increased? left or right? What direction would the direction shift if some additional water was added? left or right? and

    asked by Kat

  58. algebra

    prove (a^2-b^2)^3+(b^2-c^2)^3+(c^2-a^2)^3=3(a^2-b^2)(b^2-c^2)(c^2-a^2)

    asked by pavatharani

  59. Physics

    A construction crew pulls up an 87.5 kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.5 m and it arrives with a speed of 15.6 m.s having started from rest. Assume that acceleration was not constant. How much

    asked by Casey

  60. runways

    IF THE LENGTH OF THE RUNWAY IS 6 INCHES, WHAT IS THE PERIMETER?

    asked by daniel

  62. Physics

    A mass is hanging on the end of a spring and oscillating up and down. There are three forces acting on the mass, the force of the spring, the force of gravity, and the force of air resistance. Which of these forces can be associated with potential energy

    asked by Ramsey

  63. geometry B

    x square root of 2= 36 round to the nearest tenth or whole number

    asked by sarai

  64. statistics

    A sample of 25 men has a mean weight of 65kg with standard deviation of 8kg. Suppose that the weight of men follows normal distribution with a standard deviation of 10kg. Find a 95% confidence interval for the population mean μ.

    asked by Ali

  65. u.s history

    in what movement does participate james weldon johnson and zora neale

    asked by lala

  66. Social Studies KKK

    How did the federal government help to reduce the klans's influence in the south?

    asked by Courtney

  67. Physics

    Imagine that your car is powered by a fusion engine in which the following reaction occurs. 3*deuterium--->helium + hydrogen + neutron The masses are (2.0141 u), (4.0026 u), (1.0078 u) and (1.0087 u). The engine uses 8.1 10-6 kg of deuterium fuel. If one

    asked by Jen

  68. biography

    Hi, im susan. I am currently in english honors and have to do a biography on someone i admire. The person i admire most right now is jeffree star. I have never really wrote a biography on someone. And could use some help. I don't know what to include about

    asked by sue

  69. school fee Question

    on my school fee sheet it says i must pay 90.00.. but i don't know what the student activity fee is for, it's 10.00. Can you pleese tell me what the student activity fee is for?

    asked by Marrie

  70. math/mathmate please answer or someone smart!!

    can you explain pie to me i'm in y7 and want to get ahead!

    asked by who wants 2 no?

  71. algebra

    rewrite as an equivalent loganthmic e-^2=0.1353

    asked by mema

  73. Community Nursing

    I need helpl in determining how to complete this paper Neighborhood hospital ED sees critical capacities by By: G. Johnson

    asked by Taylor

  74. us history

    I need to do a thesis on a late-present American history about anything. I can't think of something that will be easy and easily researched. Any ideas?

    asked by Vivi

  75. Algebra

    Use the five steps for problem solving to answer the following question. Please show all of your work. Marissa has budgeted $65 for her monthly cell phone expense. If her plan with her wireless provider is $15 plus $0.25 for each minute, how many minutes

    asked by Steve

  76. physics

    A bubble of gas, diameter 2 mm, is trapped in a container of liquid at normal atmospheric pressure (1 × 10^5 Pa) and a temperature of 25 °C. The container is opened on board an aircraft where the temperature is 22 °C and the surrounding pressure is

    asked by meme

  77. life orientation

    in 10-15 line critically discuse 5 ways in which the human or environmental problem impact on the community.provide relevant sources to support claims

    asked by raymond

  78. science

    can you live off of 10.5 ml of water

    asked by Anonymous

  79. Chemistry

    What happens to the rate of a reaction if the temperature is decreased and why?

    asked by Kat

  80. chemistry

    222g of oxygen contains how many moles?

    asked by mason

  81. science

    what problems are acid precipition associated with

    asked by kenya

  82. BIO

    what structures of the inner ear are activated by a somersault? A cartwheel? By fast acceleration in a race car?

    asked by Tee

  84. algebra

    A home's backyard drops 9 ft over a horizontal distance of 124 feet. Find the slope of this back yard. Round your answer to two demical places

    asked by lori

  85. English

    Can you please check these few sentences, please? Thank you. 1) I just wanted to know why two meals are not included in your rate and how much your hotel charges for a dinner. 2) Would you please be so kind and send me the details of your offer again?

    asked by Henry1

  86. logic

    Catherine goes to her local movie theater only to see romantic comedies. Since Catherine did not go to the movies yesterday, there is not a romantic comedy playing at her local theater.

    asked by kim

  87. algebra 1

    which expression is equal to 6(9+2)?

    asked by sonia

  88. statistics

    A certain defect (D) is present in about 1 out of 1000 cars during production [P(D)=0.001], and a program of testing is to be carried out using a detection device which gives a positive reading with probability 0.99 for a defective car [P(+/D)=0.99] and

    asked by masaad

  89. Media & american culture

    I need help with a thesis sentence about music stating how & why it is more than an important piece of entertainment

    asked by Kellie

  90. statistics

    If 50% of the automobiles sold by an agency for a certain car are equipped with diesel engines, let X represent the number of diesel models among the next 5 cars sold by this agency, write the probability distribution of X.

    asked by Ali

  91. Physics

    An object of mass m travels halfway around a circle at a constant speed v. The magnitude of the total work done on the object by the net force acting on it (not counting starting and stopping at the beginning and end of the path) is a. equal to mv b. equal

    asked by Ramsey

  92. Physics HELP!!

    What daughter isotopes are produced when a neutron combines with a nucleus of 235/92 U? Assume that three neutrons are also produced in the reaction. A. 140/56 Ba, 95/36 Kr B. 142/56 Ba, 93/36 Kr C. 140/56 Ba, 93/36 Kr D. 141/56 Ba, 94/36 Kr Please help.

    asked by Anonymous

  93. busiess communication

    . In which of the following situations would using the word "you" typically NOT be appropriate? (Points: 5) When you must inform a subordinate that she has inadvertently made a costly error When you must inform a subordinate that you have passed her idea

    asked by Anonymous

  95. math

    is 395 divisible by 3 and 5

    asked by Anonymous

  96. science

    if i push a marble with 1 whatever you measure force with! How fast will it go and how far? year 7 correction of last Q

    asked by who wants 2 no?

  97. medical terminology

    define midsagittal

    asked by tray

  98. maths

    1/2 of 156.25g!

    asked by tess

  99. maths

    how much of a Newton would u flick a marble with?!

    asked by who wants 2 no?

  100. science but not really!?

    how heavey is a marble (in grams)?please answer quick!!

    asked by who wants 2 no?

  101. math

    the volume of a container that is 8'' long , 4 '' deep, and 3'' high is _ cu in. ???

    asked by jay

  102. ms sue please answer quick! science (sort of)

    how much of a Newton would you flick a marble with?!

    asked by who wants 2 no?

  103. science/maths?

    how much force is needed to accelerate a golfball and basketball at the same speed for one metre? please help needed soon!!!

    asked by who wants 2 no?

  104. pope john paul 2

    can you tell me the background information on the pope jogn paul 2 of inspiration's life. And how this person has influenced our faith or inspired us to be a better person pleaseeee helppppp

    asked by kim

  106. chemistry

    A lab technician determines the boiling point elevation of an aqueous solution of a nonvolatile, nonelectrolyte to be 1.62°C. What is the solution's molality?

    asked by kellyb

  107. geometry

    Point P has coordinates of (-11,2) and the circle C has the equation of (x-1)squared + (y-2)squared = 36. How do I caculate Point A?

    asked by Jane
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