Critical Thinking/Math

146,276 results, page 43
  1. math

    You are thinking of making your mansion more energy efficient by replacing some of the light bulbs with compact fluorescent bulbs, and insulating part or all of your exterior walls. Each compact fluorescent light bulb costs $4 and saves you an average of
  2. Stuck on 3d - Math

    Suppose you’re thinking about buying a used car, but you’ve become worried about the selection problems. In this market, the seller of each car knows the true value, but the buyer can’t determine the value until after purchase. Assume that there are
  3. English

    Thank you. Can you check these sentences for me, please? 1) When do you think we should hold our first meeting to agree on a common theme for our Comenius project? 2) I think that we’ll agree on which students to include in the project during our
  4. Physics

    A cardboard box of unknown mass is sliding upon a mythical frictionless surface. The box has a velocity of 4.56 m/s when it encounters a bit of friction. After sliding 0.700m, the box has a velocity of 3.33 m/s. What is the coefficient of friction of the
  5. General

    Please understand that I am not upset with anyone or whatever I just want to know something. I have some work to be checked and the regular tutors here say that "we will be happy to critque your thinking" right? Ok so when someone comes to this site and
  6. physics

    A system undergoes a two-step process. In the first step, the internal energy of the system increases by 368 J when 144 J of work is done on the system. In the second step, the internal energy of the system increases by 24 J when 248 J of work is done on
  7. Chemistry

    The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 8.50 g of naphthalene (C10H8) in 425 g of benzene (Kf of benzene = 4.90°C/m)? I worked this problem for someone just a couple of days ago. delta T = kf m kf = 4.90 m =
  8. english/broadcasting

    can you proofread my broadcast news stories I had to write.. had to write 3 of them answering the who what when where why and how... if they need revising that's fine.. from what i understand broadcast news stories have to be conversational. 1. THE
  9. sat essay

    Is it necessary for us to find new solutions to problems? Many people may argue that we don¡¯t need to since we are already able to solve the problems. As far as I am concerned, we should always try to find new solutions to problems. New solutions enable
  10. English

    9. I'm thinking of buying a present for my son's birthday. (Does 'for my birthday' modify 'bying' and is it an adverbial clause as well? Or is it an adjective phrase modifying 'present'?)) 10. I need two dollars for the bus. (Does 'for the bus' modify
  11. Biology

    Two purple flowers (Bb) are bred with each other in the same garden. What are the odds that red (BB) and blue (bb) flowers will occur in the second generation? A. 50% red flowers; 50% blue flowers B. 25% red flowers; 75% blue flowers C. 75% red flowers;
  12. stats

    A researcher hypothesizes that a new herbal supplement improves memory. A sample of n = 25 college students is obtained and each student takes the supplement daily for six weeks. At the end of the 6-week period, each student is given a standardized memory
  13. Science

    A sliver bar 0.125 meter long is subjected to a temperature change from 200C to 100C.What will the length of the bar after the temperature change? See the aluminum question. I will be happy to critique your work and thinking. A silver bar 0.125 meter long
  14. Statistics

    Before i state my question I would like to note that I have to do a one tailed test but i don't know how to with the information given. I need a standard deviation, i need a mean, but do i use the mean for yrs drivin or number accidents. Please explain 2.)
  15. English

    I included some corrections I did myself and a message I need you to check. 1)The apron stage was circular in shape and was projected in the open air. Correction: it's projected into the yard. 2)The witches predict to Macbeththat he will be Thane of Cowdor
  16. Statistics

    For all of the following use the five step process to solve the problem in the question, that is, state the null hypothesis, the alternative hypothesis, the level of significance and the type of test (z-test, t-test, p-value, confidence limit and whether

    PLZ HELP. THANKS. The balance wheel of a watch oscillates with an angular amplitude of rad and a period of 0.220 s. a) Find the maximum angular speed of the wheel. (b) Find the angular speed of the wheel when its displacement is /4 rad. (c) Find the
  18. stats

    Test the claim given, identify null hypothesis, alternative hypothesis, test statistic, p-value or critical values, conclusion about the null hypothesis and final conclusion Environmental concerns often conflict with modern technology, as is the case with
  19. English

    So I'm working on an english paper but I've been stuck the past hour on what to do. I'm trying to take my teachers advice by putting in an anaphorism (repeated words or phrases)but I'm having trouble. I'm repeating the phrase "eight months" but I'm stuck
  20. Advanced Chem- Intermolecular Forces of Attraction

    Answer/ explain the following in terms of intermolecular forces and properties of the substances referred to in each situation. 1. Why is it that if a glass is slightly filled above the brim with water, the liquid does not overflow? 2.Induced dipole forces
  21. Ethical Theory, Business Practice, and the Corpora

    Speedy Motors Company (SMC) gave less than a month notice before they laid off nearly 2,000 workers and closed the facility. This facility had been providing jobs for the community for over 20 years. Terms of the close - what notice would you give, what
  22. Psychological Statistics

    A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about
  23. Psychological Statistics

    A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about
  24. Psychological Statistics

    A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about
  25. Medical 2

    This 82 yr old female was admitted for acute exacerbation of chronic obstructive pulmonary disease. The progress notes indicate that the patient received a transfusion for anemia. The discharge diagnoses state acute exacerbation of chronic obstructive
  26. Word Problem

    A wire from the top of a TV tower to the ground makes an angle of 52 degrees with the ground and touches the ground 180 feet from the base of the tower. How high is the tower? a)290 feet b)230 feet c)110 feet d)140 feet I'm pretty sure we can eliminate c
  27. English

    Directions: Identity the participle or participle phrase and the words that they modify: The horseman is the ghost of a beheaded soldier who appears at night. I am thinking beheaded is the participle that modifies the soldier or is it a phrase beheaded
  28. chemistry

    a galvanic cell: A copper electrode is placed in a Cu(NO3)2 electrolyte. An iron electrode is placed in a Fe(NO3)3 electrolyte. a) What will happen to the voltage if sodium sulfide solution was added to the copper solution(I found that CuS(solid
  29. Applying Algebraic Thinking to Data

    Snoopy is in his plane, 4500 ft above ground. he fires a projectile straight up. The Vo of the projectile is 340 ft/s. (after the projectile is fired, it has no acceleration, so its height can be modeled by a "falling body" model). The Red baron is
  30. physics

    A sled of mass m is given a kick on a frozen pond. The kick imparts to it an initial speed of 2.00 m/s. The coefficient of kinetic friction between sled and ice is 0.100. Use energy considerations to find the distance the sled moves before it stops. find
  31. chem

    If 4.75 mL of cycohexene is reacted with 7.04 g of bromine, which is the limiting reagent? What is the theoretical yield of product? Alkenes like cyclohexene undergo addition reactions with bromine to produce dibromoalkanes. So, write and balance the
  32. FDU

    A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about
  33. chemistry

    A colloid is the dividing line between solutions and heterogenous mixtures. What is the exact particle size of a colloid compared to the exact particle size of a solution. A. over 1000nm compared to 0.1-1nm B. 1-1000nm compared to 0.01-1nm C. 0.10-1nm
  34. English

    I need some help diagraming the sentence: How can an art decay? Thanks, Michelle art | can decay ________________ \ \ \an \ How \ \ Please note in the above diagram that "How" modifies "can decay." i need help distinguishing verbs from verbals (cont.) i
  35. crt thinking

    Over time, non-specialists are usually able to assimilate radically new scientific ideas, even though these ideas may seem strange when they are initially introduced. Such was the case with Newtonian physics; when Newton proposed his ideas regarding motion
  36. Anatomy & Physiology

    George was an industrial worker who had just completed working four days of double shifts. At the end of his last 2 hours of the fourth shift he experienced an episode of dizziness and blurred vision. Describe what you think has happened to him and which
  37. Physics - Aristotle and his theory

    Aristotle beleived that wood was a combination of fire, water, and earth. Use his 4 element theory to explain why a wooden boat floats on water. His theory is hard for me to understand. The only thing I know is that the boat floats on the water because the
  38. biology

    two fruitflies were mated. Red eys and normal wings are dominant to black eyes and vestigial wings. Female: Red eyes, normal wings. Male: Red eyes, vestigial wings. a) what are the possible genotypes of the female b) what are the possible genotypes of the
  39. Math....Please help I have a deadline for tonight!

    Use the geometric sequence of numbers 1, 1/3, 1/9 , 1/27… to find the following: b) Using the formula for the sum of the first n terms of a geometric series, what is the sum of the first 10 terms? Carry all calculations to 6 decimals on all assignments.
  40. Government

    I have to write an essay on the question: What are the advantages and disadvantages of the influence of interest groups. Do they have too much influence? Should there be more regulation of their activities? My question is, my textbook lists the advantages
  41. Physics, still don't get it!

    I'm sorry bobpursley I don't understand your response, please clarify. When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12 Hz. When another object of mass m2 is hung on the spring along
  42. Psychology

    In a classroom experiment, students were asked to place one paper clip in each hand. They were then instructed to add paper clips to the left hand until they were certain that the clips in the left hand weighed more than the paper clips in the right hand.
  43. English

    This is my Trombone Solo poem. Please see if it's good, thanks:-) I like people Who gain knowldge from school; Not any kind of people, Silly ones or cruel. I like people possessing respect in their hearts, Thinking positively about others, And doing their
  44. English

    I'm posting you a paragraph I wrote containing phrasal verbs. This is more urgent than the previous one. Thank you. 1) My friend looked very upset so I thought she needed to brighten up. I invited her to the cinema and she accepted. I thought popcorns
  45. English

    Can you please check if these sentences are grammatically correct,please? Thank you very much. 1)It’s two years since I last saw him (OR I saw him last?) How long is it since you last saw him? 2) I last (is last placed between subject and verb?) saw him
  46. physics

    In preparation for shooting a ball in a pinball machine,a spring (K=675N/m) is compressed by 0.0690m relative to its unstrained length. The ball(m=0.600kg) is at rest against the spring at point A.When the spring is released, the ball slides (without
  47. Statistics

    What does it mean when we state: "Many frequency distributions in the social sciences are approximately? And, why does this occur? My thinking is: I would have to say that many frequency distributions, in particularly the social sciences are approximately
  48. Science (chem)

    Calculate the weight of water that can be removed from a wet organic phase using 50.0g of magnesium sulfate. Assume that it gives the hydrate listed in table 12.2 table says hydrated: MgSO4.7H20 I'm not quite sure how I would go about this b/c when drying
  49. Education

    Does the Individuals Disabilities Education Act (IDEA) and the Education for the Handicapped Act Ammendments of 1986, focus on services provided to families, children, communities, or to schools? I am thinking they provide services to families. Don't they?
  50. AP Environmental Science

    I have a word problem about exponential growth. The problem is... "At 6am a few bacteria fall into a can of syrup in a broken garbage bag. The conditions of warmth, moisture, and food are perfect for growth and the population doubles every 20 minutes. By
  51. Statistics

    The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almanac, 2009): Assume that the population standard deviation on each part of the test is = 100. a. What is the probability a sample
  52. statistics

    The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almanac, 2009): Assume that the population standard deviation on each part of the test is = 100. a. What is the probability a sample
  53. statistics

    The College Board reported the following mean scores for the three parts of the Scholastic Aptitude Test (SAT) (The World Almanac, 2009): Assume that the population standard deviation on each part of the test is = 100. a. What is the probability a sample
  54. poiseuille's law

    GIVEN: L = 3.0 cm = 0.03 m r = 0.3 mm = 0.0003 m (delta) y = 1.0 m 1 pint = 500 cm^3 [approx.] given a) Find the rate of flow, F = ? b) How long will it taken to inject 1 point of blood, t = ? a & b) I know we need to find the pressure or speed. F = (P at)
  55. English help

    it is second paragraph. I want to tell you English is my second language.I try my best to do it in right way . After the death of Enkidu .He asks him self does this mean I have to die too? This thinking changes his direction. It is not doubt to say that
  56. Chemistry

    Which would have greater entropy? 1. Br2 or 2Br? 2. CH4 at 25 Celsius or CH4 at 45 Celsius? 3. 1 mol CH4 in 1-L H2O or 1 mol CH4 in 2-L H2O? This is a very good question. I will be happy to critique your thinking. I would say first that Br2 would have more
  57. Algebra

    On Monday, it took Helen 3 hours to do a page of science homework exercises. The next day she did the same number of exercises in 2 hours. If her average rate on Monday was p exercises per hour, what was her average rate the next day, in terms of p? I know
  58. Grammar

    Select the correct statement: A) The subject of the sentence is that part about which something is being said, and it sometimes contains a noun or pronoun. B) The predicate of the sentence is that part about which something is being said, and it always
  59. art appreciation

    Choose 3 works of art from 3 artists from the Baroque period through the Postmodern era. Your 3 works of art should come from the time periods or art movements covered in the readings from Unit 4 and Unit 5. This assignment will have 6 Sections (A–F).
  60. memo or letter

    informative message that tells one of your colleagues at work or one of your friends how to enroll at school. which woul dbe the best way to send it I am thinking a memo am I wrong yep I think that is correct! yep I think that is correct! What is wrong
  61. operations management

    project management can be best described as a set of related activities which have a definite starting point and end state, which pursues a defined goal and used a definite set of resources with reference to this discuss the project life cycle, the
  62. Business Management and Leadership

    Deliverable Length: 4-6 slides with in-depth speaker notes Today, many organizations and managers face new challenges everyday. One critical aspect of the challenges that managers lack in is within the planning stage. You have been asked by your manager to
  63. English

    In Nathaniel Hawthorne's "Dr. Heidegger's Experiment", I was asked to figure out how Hawthorne feels about transcendentalism. We determined that Dr. Heidegger represents Ralph Waldo Emerson, a transcendentalist. However, I can't decide if Hawthorne thought

    Thank you Reiny. I really appreciate the help but I am not really understanding the the exprssions well enough to explain the answer. Also at first I was thinking that the answer has nothing to do with actual money but only how much inventory or merchanise
  65. AP Chemistry

    A 5 gram sample of a gaseous substance occupies 10 L at 48◦C and 697 torr. What is the density of the gas under these conditions? Answer in units of g/L I first started converting the temperature to Kelvin, and the pressure to ATM. I then re-arranged the
  66. History hellp pleasse

    Hi please help with my question Even if you didn't mind the consequences , why would you still be very unwilling to speak out against hitler and the Nazi ? Please help That is obviously a personal opinion you need to decide on and then be able to explain.
  67. calculus

    You are given that f(x) =1+ax+ax2 f′(x) =−(x+2)ax3 f′′(x) =(2x+6)ax4 and the constant a>0. Write down all intervals on which the function is increasing, decreasing, concave up or concave down. (Enter using notation (a, b). Use a
  68. Physics

    Alright, I can't figure it out, here's the problem. 3. A boy is giving his little sister a ride in the wagon. He pulls with an applied force of 20N. The frictional force against him is 20N and the sled is traveling 2m/s. If the boy pulls the wagon 45m, how
  69. Chemistry

    Assuming the dissolution of borax in water is a spontaneous reaction, do you expect the change in enthalpy to be positive or negative or are both signs possible? Explain your answer A. Neither, enthalpy does not change, the positive entropy for the
  70. Calculus

    Suppose that represents the temperature of a cup of coffee set out in a room, where T is expressed in degrees Fahrenheit and t in minutes. A physical principle known as Newton’s Law of Cooling tells us that dT/dt = -1/15T+5 15T + 5. a) Supposes that T(0)
  71. physics

    A metal rod is forced to move with constant velocity along two parallel metal rails, connected with a strip of metal at one end. A magnetic field of magnitude B = 0:350 T points out of the page. a) If the rails are separated by L = 25.0 cm and the speed of
  72. math help

    can someone give me an example of what they mean about this problem. I have to come up with a real-world example where we can apply the concept learned within our chapter that the data could be linear which it talks about solving equations using the method
  73. Physics

    1. What is the weight of a 24kg mass on Mars if its surface gravitaional field = 3.5N/KG? a) 235.2 N b) 84 N c) 24 kg d) 6.86 kg 2. A space shuttle is placed in a circular orbit around the Earth. It then thrusts its engine and moves to a new orbit, as
  74. physics

    Newton was holding an apple of mass 120 g and thinking about the gravitational forces exerted on the apple by himself and by the Sun. Calculate the magnitude of the gravitational force acting on the apple due to Newton, the Sun, and the Earth, assuming
  75. statistics

    In the following regression, X = total assets ($ billions), Y = total revenue ($ billions), and n = 64 large banks. (a) Write the fitted regression equation. (b) State the degrees of freedom for a twotailed test for zero slope, and use Appendix D to find
  76. History

    Can someone help me out here? Quote: “He has abdicated Government here, by declaring us out of his Protection and waging War against us. He has plundered our seas, ravaged our Coasts, burnt our towns, and destroyed the lives of our people. He is at this
  77. Biology

    I added amylase to a cornstarch suspension. I thought that amylase breaks down starch into oligosaccharides. But then I heated up the amylase + cornstarch solution and added Benedict's reagent to it (which tests for the presence of monosaccharides). The
  78. Math puzzeler

    this one is so good (and not solved) I pulled it foreward in time Posted by quizzical on Thursday, November 16, 2006 at 6:24am. Hello, This is just a question that has stumped me for some time: We have a normal watch. The big hand is 4cm long and the
  79. science(chem)

    Solubility: Solubility of compounds in a)water (highly polar) b)methyl alchohol (intermediate polarity) c)Hexane (nonpolar) My guess 1. Benzophenone a) not soluble b) partially soluble c) soluble 2. Malonic acid a) soluble (since it's polar) b) soluble c)
  80. how do protons move during electrophoresis

    During electrophoresis, protons move in the same direction as DNA. do not move at all. move in the opposite direction as DNA. move randomly. I am thinking they move in the same direction as DNA or am I wrong? DNA travels in accordance with its principal
  81. English

    The simile describing tom's voice as "Tom talked incessantly, exulting and laughing, but his voice was as remote from Jordan and me as the foreign clamor on the sidewalk or the tumult of the elevated overhead." serves to a. compare tom's voice with urban
  82. English

    Can someone please help to find poetic devices in this poem? I know there's similes, alliteration and repetition. Can someone help me find about 5 or 6 poetic devices? Any help would be appreciated :) Lying, thinking Last night How to find my soul a home
  83. overview of teaching techniques

    which of the following is frequently used in the expository model of teaching? (a)deductive thining(my answer) (b)inductive thinking (c)discovery learning (d)knowedge-based learning what type of learning uses formal lectures? (a)student-centered
  84. statistics

    Assume that you own a small factory. A critical piece of machinery in your factory will need to be replacedin 180 days. If the machinery does not show up on time, you will need to shut down until it arrives. This might cause you to permanately lose
  85. Intro to Communication- Please proofread my paper

    Here is my assignment task: My assignment was to watch the movie Gangs of New York with Leonardo DiCapro, and find 5 different cultures that faced discrimination within in the movie and use specific examples. Here is my paper. I am missing 2 more cultures.
  86. Social studies needs your help!!

    I am in a very tight situation. I am a grade 4 social studies teacher. In my classroom, I have students of mixed ability. Some students are above grade level, some on grade level and some below grade level. The bulk of students is below grade level. What
  87. statistics

    An expert witness in a case of alleged racial discrimination in a state university school of nursing introduced a regression of the determinants of Salary of each professor for each year during an 8-year period (n = 423) with the following results, with
  88. Business Statistics

    The manager of a vacation resort has claimed that, on average, a guest spends at least $3000 at the resort during a one week stay, including meals and entertainment. A member of the accounting staff does not believe the amount is that high. They authorize
  89. Literature

    A pschoanalytic approach to the reading of literature views conflict and character of any literary work as a reflection of the needs,emotions,status of mind and subconcious desires of the author.By extension,in literature,this approach tries to explain why
  90. Chemistry

    I did an experiment to determine the freezing point depression and then find the molecular weight of the unknown solute added to the solvent, what would be the effect on calculating the molecular weight if some cyclohexane(my solvent) evaporated while the
  91. Chemistry II

    The total volume of hydrogen gas needed to fill the Hidenbrug was 2.0e8 L at 1.0 atm and 25 degrees Celsius. How much heat was evolved when the Hidenburg exploded, assuming all the hydrogen reacted? I will be happy to critique your thinking on this. First,
  92. science( chem)

    Calculate the molar solubility of Mg(OH)2 in water I know Mg(OH)2=> Mg2+ + 2OH- 2H2O=> H3O+ + OH- Ksp= [Mg2+][OH]2 Kw= [H30+][OH-] Mass balance [Mg2+]=2[OH] So.. [OH-]=2[Mg2+]+ [H3O+] Charge balance is where I get kind of confused I know that the
  93. Physics - repost to MathMate or whoever can help

    A 10-kg iron ball is dropped onto a pavement from a height of 100 m. Suppose half of the heat generated goes into warming the ball. Show that the temperature increase of the ball is 1.1oC. (In SI units, the specific heat capacity of iron is 450 kJ/kg*oC.)
  94. Teachers Aide/Language and other Barriers

    13. In an ESL classroom, teacher aides should prepare themselves to A. learn or become familiar with appropriate language-related software programs. B. handle all disciplinary measures that arise on behalf of the teacher. C. counsel parents regarding their
  95. Statistics

    The game of chuck-a-luck consists of rolling 3 dice. The player picks a number, 1, 2, 3, 4, 5, or 6. Winning and losing depends on the number of times the number appears on the top of each die. If the number appears once then the winnings are equal to the
  96. history

    "... In administering the laws of Congress I shall keep steadily in view the limitations as well as the extent of the Executive power trusting thereby to discharge the functions of my office without transcending its authority. ..." Review section 1. What
  97. english

    That time of year thou mayst in me behold When yellow leaves, or none, or few, do hang Upon those boughs which shake against the cold, Bare ruin'd choirs, where late the sweet birds sang. 5In me thou see'st the twilight of such day As after sunset fadeth
  98. Physical Science Question 3

    Compare the visible part of the ear to a satellite dish in terms of form and function. I will be happy to critique your thinking on this. WTF bobpursley? You are of no help to me on any of this! If I want you to "critique my thinking" I was ask you to, but
  99. Economics

    Determine whether each of the following, other things held constant, would lead to an increase, a decrease, or no change in long-run aggregate supply: a. An improvement in technology b. A permanent decrease in the size of the capital stock c. An increase
  100. psychology

    Could someone please provide help formulating interview questions relating to learning, intelligence, cognition, problem solving, motivation, effects of gender and culture on emotions and personality. We will very much enjoy reading the questions you