1. Statistics

    A student is taking a true/false exam with 15 questions. If he guesses on each question, what is the probability he will get at least 13 question right?
  2. Chemistry

    It is easy but I cannot solve or do buffer questions/slns.. Please help. Describe the preparation of 500 ml of 1 M phosphate buffer at pH 7.2.
  3. :):):):)

    Asking questions and drawing conclusions will do which of the following? A. Help you stay alert while reading B. Engage you in active reading. C. Help you remember information. D. All of the above. i got A what do you think?
  4. Chemistry

    The speed limit on a certain highway is 72km/h. What is the speed in cm/s? Could you go through each step on how to get the answer? Lots of the questions are like this one, but I don't know how to do them.
  5. writing

    Post your response to these questions: How do you spend most of your time? Do you think that your time is managed effectively? Explain your reasons.
  6. statistics

    a quiz had 6 questions, each with 4 possible answers (only one of which is correct). If you answer them at random, find the probability that all are correct and at least one is wrong.
  7. geometry

    to all the people that helped me with my recent geometry questions thankyou my grade I received was 45 out of 50 points best I've ever done in my class.
  8. math 121

    jennifer is asked to complete 5 of the 7 essay questions on her literature exam how many choices does jennifer have?
  9. @john in Honduras -- banned

    You're banned from posting here because you asked for answers to a test -- and didn't even post the questions.
  10. algebra

    Please help me! Sorry there are 4 questions I need to check my attempts with to see if I am on track. Thanks!! 1. 5-3[2(3x-4)+3] 2. Evaluate when x = -3 and y = 2 3x squared - 4y squared _______________________ 4x - 7y 3. -3/4y = -24 4. m + 1 + 5 = 2m - 1
  11. Biochemistry

    Appreciate if you could help me answering the following questions! thank you!! How would you prepare a 20% homogenate from a 2.0g of liver using 0.25M sucrose? why is it necessary to cool the homogenate during homogenization?
  12. Math

    A student guesses on every ??? of a multiple choice test that has 9 quetions, each with 3 possible answers. what's the probability the student will get at least 7 of the questions right?
  13. Math

    How do you solve second order initial value problems? I don't understand how would solve these questions..for example (d^2 y)/(dx^2 )=24x^2-10. When x=1, dy/dx = 3, and y = 5. Can anyone explain how?
  14. Spanish for María

    Are you sure you understood the answers to the two posts this morning? Please look at my answers and explanations and then post any questions you have. Sra
  15. Pre-Calc

    Hello I'm stuck with these two questions The point (1,-2) is on the graph of . Describe the following transformations on , and determine the resulting point. a) g(x)=f(x+1)-3 b) -f(2x)
  16. statistics

    A test consist of 10 multiple choice questions, each with five possible answers, one of which is correct. To past the test a student must get 60% or better
  17. Advanced Functions

    Hello I'm stuck with these two questions The point (1,-2) is on the graph of . Describe the following transformations on , and determine the resulting point. a) g(x)=f(x+1)-3 b) -f(2x)
  18. English Expression

    Q1) I'm sorry. That's all right. Think nothing of it. It's nothing. Not at all. Think nothing of it. Q2) Thank you. You're welcome. Don't mention it. Not at all. It's my pleasure. It's nothing. Are the answers to the two questions all correct? Would you
  19. Math 221

    These are the questions that's used for my classwork and I need help with it. There is no typo. y=x+4 and the parallel must past through this given point (-7, 1) y=-1/2x+1, and the perpendicular must pass through this given point (4, 2)
  20. Algebra

    Hello, I am having a bit of trouble with two Algebra questions 1. Solve x= 8x - over the domain [0, 2, 4, 6] 2. For what values of a is the equation /a/ =5 true? Thanks in advance.
  21. General

    Why didn't you guys are answering my questions at all. 8 question posted tomorrow but not even a single question is answered yet.
  22. math

    You answer 32 questions correctly on a 45 question test.you leed a score of at least 60% to pass. Do u pass? Explain
  23. Geo

    For questions 33 and 34, write the equations for the lines parallel and perpendicular to the given line through the given point (one point for each equation). x - 3y = 9 through (2, -1)
  24. Algebra readiness

    Unit 4 Lesson 11 Real nmbers and the coordinate plane unit test. Need help on questions 1-20
  25. Science Paper

    I am sorry I am asking so much questions. I promise this is my last one. How do you give credit to the sites agian. Please she me how to do it. I am a bit rusty. Thanks agian!
  26. English

    Could someone explain whats the difference between these two questions? Why do you wish to study the program(s)? What influenced your decisions to apply to the program(s)?
  27. l.a

    flowers for algernon trail play what are some questions to ask if you are the prosecution in the play to the doctors who did the operashun on Charlie in the story
  28. math

    Could you explain to me why 9/64 is the answer to the following questions:A fair spinner is spun three times. The spinner is labeled A,B,C,D. What is the probability of getting a c exactly twice?
  29. Math/Derivative

    Can someone help me figure out the answer and..possibly show the steps.. to finding the derivative of these 3 questions.. 1. f(x)=2(e^x) - x^2 2. f(x)=e^x/(e^x +1) 3. y=10^(√x)
  30. English

    True or False? Adverbs often answer the questions: where, when how, how often. True???
  31. Ms. Sue

    Ms. Sue, can you tell me of whether my answers to the questions of Health posts are correct or not? Thank you.
  32. Connexus Help

    Does anybody go to Connexus Acadimy 7 grade??i need someone to correct my Art questions!!
  33. Stats- Simple

    If I ask 10 adults 3 questions for a sample, is my sample size 10?
  34. Algebra

    I have two questions: first question is : [ 8(6-1)-1]-[2-(5-2)] i got 40 as my answer is this right? And second question is -y + - 80 an equivalent expression to -(y+80)? Because I got -y + - 80.
  35. Larry Ya banned

    Banned for giving test answers with no questions.
  36. French

    I need to ask 2 grammatical questions about french for my blog can somebody please give them to me in English. Thank you
  37. ?

    Let me see if I understand how to find your grade now. So this time if there are 60 questions and you miss 15 your grade would be a 72?
  38. maths

    the 8th term of an a.p is 37 and 12th term is 57 .find the a.p please help this questions .please help.
  39. algebra

    I'm not sure how to answer this question? 1<3x+2<12 Please explain the answer so I know how to do these kind of questions
  40. Statistics

    A student is to answer 10 out of 13 questions in an exam. how many choices he has if he must answer at least 3 of the first
  41. Calculas

    Can someone walk me through the following questions: Partial Derivatives f(x,y) = x^7 -8y -3 find x and y f(x,y) = 7 / 5x + 4y, find x and y
  42. Algebra 2- reposted no one answered

    look at the function and answer the questions. x y -3 2 -1 0 0 5 1 2 2 7 What is x when f(x)=2 ? What is a zero of this function?
  43. English

    1, How does she look? 2. What does she look like? 3. How does she feel? 4. What does she feel like? - She looks surprised. (What is the suitable questions for the answer?)
  44. Why was my ? deleted

    Why was my question deleted? It had nothing inappropriate, as it was just asking for help on a couple Spanish questions.
  45. Math

    For questions 1 and 2, use the matrices below: A=[17 2 3] [11 4 -9] B=[10 6 -7] [-4 3 0] C=[1] [2] [-2] 1)Find A-B [17-10] [2-6] [3--7] [11--4] [4-3] [-9-0] =[7 -4 10] [15 1 -9] 2)Find BC, if possible. 10(-1) 6(2) -7(-2) -4(-1) 3(2) 0(-2) =[-10 12 14] [4 6
  46. Math

    Max earned a 85% on his test. If there were 40 questions on the test, how many did he get correct?
  47. just questions

    Why is poverty experienced by Native Americans and that experienced by other groups?
  48. Dr. Bob

    Dr. Bob, can you please tell me if I did my chem questions right... they have been sitting down there all day and all i need is someone to check if they are right please and thank you
  49. book discussions

    In general, what are some "must ask" questions when holding a discussion about a book?
  50. Where is DrBob222?

    Hey does anyone know when DrBob222 comes on here, cause I have a lot of chemistry questions which I need him to check. Thanks.
  51. Some questions..

    How does Jiskha work? and is being a jiskha tutor an actual job?
  52. business

    can you please check my answers to the questions i realy need to check them if they right or wrong
  53. early childhood ed

    Test exam questions..exam 405550
  54. English-Friendship Poem

    I've read through this friendship poem, and now I need help with some of the questions. Here is this frienship poem: If you don't come-by marguerite mack The sun will get smaller and smaller and the grass won't green or the trees leaf and there will be no
  55. history

    The following links provided weren't helpful.. I used them to discover parts of my answer though. Can someone check my answer and help me with questions 2? How does the Euthyphro Problem attack modern cognitive religion? Is there a response that would
  56. HISTORY!!!

    I have this test tomorrow and i have yo do this study guide and i don't no two of the questions... they are... what did the progressives support and what dod they oppose in the progressive era?!? three things for what they supported and one thing for what
  57. literature

    we read my sister's keeper and one of the questions from our study guide talks about Campbell's dog, Judge in what ways do dogs introduce ideas about loyalty and instincts?
  58. Criminal law

    During a trial, both the prosecutor and the defense attorney may __________ to questions asked by the other party. (Points: 5) request a judgment object ask for a recess tell the person not to respond I think its B
  59. English (not homework)

    I've been wondering, why is "how are you?" correct and commonly used instead of "how is you?" Since "is" is singular and "are" is plural and "you" is referring to an individual. An explanation will be appreciated. Thank you, tutors, for sparing your time
  60. chemistry

    Answer the following math questions focusing on significant figures a. 45.3L x 10 mol/L = b. 67.894 g ÷ 2.56 L = c. 45.3m + 12.344m + 1000m – 1.34m = d. 35cm + 8.3m + 75.341 km + 80,000 mm = e. (43.7m + 39.3cm) ÷ 25.332 m/s =
  61. chemistry

    Write the reaction equation for Isopropylbenzene producing Benzene P.S I don't mean to be overburdening you with the same kinds of questions its just that there is a quiz on this stuff on Monday and I want to be FULLY prepared LOL
  62. PreCalculus

    I tried to do these questions, however I can't seem to get the answer. Can someone help me? I would really appreciate it. _____________________________________ Mathematical Induction Prove that the statement in true for every positive integer n. 1. 1/1*2*3
  63. To JJ

    You have been un-banned from this website, and you need to focus only on your own homework questions. If you revert to posting semi-correct, false, useless, or other kinds of answers to other students' posts, the ban will be reinstated.
  64. Spanish

    I have two questions: 1) Como se llama la plaza donde celebraban desfiles militares? (12 letters) ----- -- ----- 2) Quien pesó oro en la Casa del Cordón? (20 words) -- ------ ------- ----- Thank you for your help
  65. History of Religion

    I have two questions for you and for both of these it would help to know something about the Roman Catholic Church in the past. Anyway, firstly, did dioceasan bishops always have to reside within the confines of their dioceases? Also, who was the first to
  66. english

    Okay... these are a lot of questions! would Auden's 'The Unknown Citizen' be an example of reductio ad absurdum? And is the entire poem an epitaph? Or is it simply the persona speaking? Would you say it is a combination of elegy and satire?
  67. English

    Hello, can someone please help me? I have to do an assignment, and one of the questions ends in a phrase that I don't understand. The words are "crossing the common." Thanks if anyone can help. I've been stuck ever since I got to it, and the online results
  68. Physics

    1) Is it accurate to describe the physical universe as composed of only matter and energy? 2) How is it possible that only 92 elements are found in the natural world but there are millions of different types of molecules? I really have no clue about these
  69. English

    Which sentence uses an objective case pronoun incorrectly? >I e-mailed him yesterday. >I sent him an attachment that included photos of the picnic. >He wrote back to Bob and I with an answer to our questions.
  70. Social Studies

    Here are some questions i need help on. Ture or False 1.Grmans came from an area of Germany that had been devastated during a numder of wars. 2.Quaker women parted fully in religious affairs.
  71. english

    Instructions in procedural texts should appear in the form of __________. a. descriptive phrases with adjectives b. commands with active verbs c. questions and answers d. complex sentences and paragraphs
  72. Statistics

    Assume x is normally distributed with mean µ= 15 and standard deviation α= 3-. Use the approximate areas beneath the normal curve, as discussed in this section, to answer the following questions. Find P (X ≥15)- A) 0.50 B) 0.16 C) 0.34 D) 0.84
  73. Biology

    I'm stuck on these 2 questions..please help in any way! Thanks 2. How can genetic altering benefit the society of today and future societies? 6. What other areas of life could this manipulation of genes cause? Links would be of great help, or suggestions.
  74. Language Arts

    In which sentence is a pronoun used as a direct object? A. The stars of the play were Pablo and me. B. My dad gave me his old watch. C. Nan invited my sister and I to her party. D. Ask me no more questions, please
  75. Biology

    Respiratory system questions? How could expiration be aided by thoracic and abdominal wall muscles? why does a throat infection cause your voice to produce lower pitched sounds?
  76. Tiếng ANh

    Thầy làm giup em câu này với ạ. Make these sentences positive or negative or questions, using the verbs given in capitals and the past Simple. Of course we …. The house ourselves. We don’t know anything about building!
  77. Algebra 2

    I have solved these equations but the directions require me to show work or provide an explanation and I don't know how.Here are the questions: Write each of the following in exponential form: 1) log3 x = 9 3^9= x 2) log2 8 = x 8= 2^x 3) ln x = 2 e^2 = x
  78. English

    2 questions: 1. what is the one poetic device called that's an extended metaphor and can last for mostly all of the entire poem? 2. what is the conceit that the tv shows 'rugrats' and 'family guy' share with regards to biabies and speech????? thanks!
  79. Physics

    A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by 3.0 cm in bringing the
  80. English

    Except for the first question the others refer to an evaluation grid I need to translate into English. I really hope you can have a look at it. 1) What would you become if you were older? What will you do when you are grown up? 2) Essential (basic?)
  81. can somebody answer my chem questions below plzz

    I have posted some chem question below can somebody answer them plzzzzzz Multiple posts asking people to answer your questions will get you banned. Please be patient as someone will help you as soon as possible. If you were travling from Devner,Colardo to
  82. chemistry

    chemistry posted by Naomi today at 8:03pm. The material Magnesium Sulfate What mass of dry material would be needed to make an aqueous solution with a molality of 4 moles/kg solution ? What mass of water is needed? 4 (24.305+ 32.065+ (4 x 15.999)) =481.5
  83. Math-PLEASE HELP!!

    I have two questions That I need help with please!! 1. solve the following exponential equation. what is the exact solution? what is the decimal approximation when rounded three decimal places? 2.
  84. Literature

    These questions regards "Rules of the Game" by Amy Tan. 1. What did Tan find most awarding about the transformation of her work to film?
  85. math

    Subtract 8/9 - 7/12 write your answer as a fraction in simplest form my answers 33/108 and 11/36 Questions 2: Multiply 2/9 * 18 My answers =36/9 =4/1 =4
  86. Math

    does anyone know how to find the answer to the following questions: An invoice is dated Aug 29 with terms of 4/15 E.O.M. What is the discount date and the net date ?
  87. help

    i thought you were a helping site please help i read my lessons but i just coulnd answer some questions. help please i need to pass this test, i would really appreciate it your time. im new to this site
  88. important to any teacher

    please any jiskha teacher that be online you please able to delete my english posts? i not want anyone landng on my post asking same questions on google. thank you.
  89. Physics

    HI I'm just looking for an answer for 3 questions as my textbook does not explain the answer. How a tin can loses heat through: 1) Conduction 2) Convection 3) Radiation
  90. To Ramon - English

    I removed your latest post because it included too much personal information about you. Do not post the name of your school or your last name. Please see my questions about your question below.
  91. Math

    On a multiple choice test you guess he answers to two questions. Each question has five choices. What is the probability that you both answers correct?
  92. Reading

    What should you do before you begin reading? A. Review the introduction and conclusion. B. Ask yourself questions about what lies ahead. C. Study graphic aids. D. Both A & B. I think its A...?
  93. Algebra

    I need help this this question it is on of the questions on an assesment and i cant get it wrong but i don't know the answer please help! Find the length of the segment MN with endpoint M at 2,-3 and endpoint N at 8,5
  94. Graphing in the Coordinate Plane Unit Test

    which ordered pair is not a solution of y= -4x - 9? (-9,27) (3,-21) (-6,15) (5,-28) If you have all the answers to the whole test that would be amazing. 22 questions.
  95. Math

    Hi I really need help. I don't know even how to figure these two questions out so if you could help me, please. Is (–4, 10) a solution to the equation 10 – 5x = y? Explain your answer. Describe the pattern in the table using an equation. x|y 1|15 2|25
  96. English

    for WFE book i hve some questions in chapter 8 jcob say he not ready to be old yet, tell what he mean by this, what determine age, when one become old? this just be when you feel old u be old? it not have anything to do with age?
  97. Math

    I need these questions answer for my project: What is a perfect square? What is a square root? What is the rule for multiplying and dividing fractions?
  98. Help Needed

    I really need help with my Heredity problems. I have a few questions on them which I do not understand, and I went to some sites as well, but some sites require this type of flash thing which I do not have, and so if there is anyone who can help me on
  99. physics

    If the position of a particle is given by x = 35t - 7t^3, where x is in meters and t is in seconds, answer the following questions. (a) When, if ever, is the particle's velocity zero? (Enter the value of t or 'never'.) (b) When is its acceleration a zero?
  100. algebra

    need help with 2 questions first It has been a long time since I did algebra and don't rememeber how to work the problems 1/5(x+1) + 2/5(x-1) = 3/10 2nd problem 0.1(2x-1) + 0.02(4x + 4) = 0.05x