Most popular questions and responses by rae
  1. Chemistry 171 Lab

    Suppose we collect hydrogen gas, H2(g), over water at 21◦C in a vessel with total pressure of 743 Torr. If the hydrogen gas is produced by the reaction of aluminum with hydrochloric acid: 2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g) what volume of hydrogen

    asked on June 15, 2016
  2. calculus

    Estimate the area under the curve f(x) = x2 from x = 1 to x = 5 by using four inscribed (under the curve) rectangles. Answer to the nearest integer.

    asked on February 9, 2018
  3. Calculus

    A steel storage tank for propane gas is to be constructed in the shape of a right circular cylinder with a hempishere at each end. The cost per square foot of constructing the end pieces is twice that of contructing the cylindrical piece. If the desired

    asked on July 2, 2012
  4. Physics

    When empty, a particular helicopter of mass 3770 kg can accelerate straight upward at a maximum acceleration of 1.32 m/s2. A careless crewman overloads the helicopter so that it is just unable to lift off. What is the mass of the cargo?

    asked on November 8, 2011
  5. Math

    For n repeated independent trials, with constant probability of success p for all trials, find the probability of exactly x successes. Round your answer to four decimal places n = 10, p = 1/7, x = 3 A. 0.1189 B. 0.1546 C. 0.1308 D. 0.1427

    asked on April 4, 2013
  6. Chemistry

    3Fe2+(aq) + 2Al(s) --> 3Fe(s) + 2Al3+(aq) Which of the following statements is true about Fe2+? 1.Fe2+ is losing electrons. 2.Fe2+ is oxidized. 3.Fe2+ is the oxidizing agent. 4.Fe2+ is the reducing agent.

    asked on November 8, 2016
  7. Chemistry

    A 1.75 gram perfect cube of wood has a side measure of 2.45 cm, what is the density of the wood?

    asked on October 18, 2016
  8. Statistics

    Scores on the SAT verbal test in recent years follow approximately N(504,111) distribution. What is the proportion of students scoring between 450 and 550? How high must a student score to place in the top 10% of all students taking the SAT? Please show

    asked on November 24, 2012
  9. Chemistry

    Determine the volume of a 67.5g piece of aluminum with density of 2.70 g/mL? -I know V=M/p and this is what I came up with but I'm not sure i'm correct.. p = 2.7 g/cm3 M = 67.5 g V = 25 cm3 3√ V = 2.9240177382129 cm

    asked on October 18, 2016
  10. Psychology

    I need an answer quick - I have a research question to answer: "Why is it that children of older parents (more than 40 years old) are better adjusted, have closer ties with their parents, and are more socially skilled when they enter school than children

    asked on October 20, 2017
  11. Math, probability

    A number cube is labelled 1 to 6. The cube is rolled 60 times. Predict how many times each outcome will occur. Explain each answer. a)1 is rolled. b)An even number is rolled c)A number greater than 3 is rolled d)9 is rolled. You don't have to answer every

    asked on May 31, 2017
  12. algebra

    You are going on a camping trip and can carry only 2 gallons, or 8 quarts, of water. After 2 days of hiking, you have used 3 quarts of water. There is an accident, and you find yourself on a ledge where you must wait for someone to find you. You decide to

    asked on June 30, 2016
  13. Chemistry

    Determine the mass of 18.7mL of rubbing alcohol with a density of 0.79 g/mL? - I got 14.77. I'm not sure I'm right. If someone could clarify I'd appreciate it! Thanks!

    asked on October 18, 2016
  14. I'm stuck on math plz help!!

    Which statements represent the relationship between y=2x and y=log2x ? Select each correct answer. The equation ​ y=log2x ​ is the logarithmic form of ​ y=2x ​.

    asked on January 26, 2017
  15. CALC 2

    B. 2 students are sharing a loaf of bread. Student A eats 2/3 of the loaf, then student B eats half of what remains, then student A eats 2/3 of what remains, then student B eats half of what remains, and so on. How much of the loaf will each student eat?

    asked on March 30, 2014
  16. Chemistry

    The specific heat of solid gold is 0.13 J/g • °C. How much heat is needed to raise the temperature of 25.0 g of gold from 23°C to its melting point at 1063°C?

    asked on November 29, 2013
  17. algebra

    A spring with a 2-pound weight suspended is 9 inches in length. With a 5-pound weight suspended, the length increases to 13.5 inches. Which equation does not represent the behavior of the spring? y – 2 = 1.5(x – 9) y – 9 = 1.5(x – 2) y = 1.5x + 6 y

    asked on July 1, 2016
  18. chem

    If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 Kelvin and 1.21 atmospheres? Show all of the work used to solve this problem. 2 Li (s) + 2 H2O (l) yields 2 LiOH (aq) + H2 (g)

    asked on February 19, 2014
  19. 5th grade

    Describe how proportions could be used to compare two products: If a 24-ounce can of pears sells for 1.90 and a 32 ounce can sells for $2.65, which one is the better buy?

    asked on March 25, 2010

    Why didn't God destroy Satan and his evil angels after Christ's death?

    asked on April 22, 2009
  21. Chemistry

    Suppose that 14.9 mL of 0.0512 M NaOH were required to titrate a sample of unknown acid. How many moles of NaOH were used?

    asked on March 5, 2014
  22. Math

    For n repeated independent trials, with constant probability of success p for all trials, find the probability of exactly x successes. Round your answer to four decimal places n = 10, p = 1/7, x = 3 A. 0.1189 B. 0.1546 C. 0.1308 D. 0.1427

    asked on April 4, 2013
  23. Calculus

    Find (1) marginal and (2)the average functions for the following total function. Evaluate them at Q=3 and Q=5 π=q^2+13q+78

    asked on November 21, 2012
  24. Maths

    A chord 6.6m long is 5.6m from the centre of the circle.find the radius of the circle.

    asked on August 11, 2015
  25. grammar

    Calipers were set and verified at 5 mm. What are the verbs

    asked on May 25, 2013
  26. Statistics

    The Columbus Zoo conducts a study to determine whether a household’s income can be used to predict the amount of money the household will give to the zoo’s annual fund drive. Give explanatory and response variables of this study?

    asked on November 24, 2012
  27. Ant101

    "In most situations, the first-born male has priority to inherit the chieftainship (primogeniture)" (Nowak & Laird, 2010, p. 177

    asked on December 15, 2013
  28. trig 30

    Please help I need to solve the following question for x, where 0

    asked on April 29, 2010
  29. Math

    A king couldn't sleep so, he devoured 1/6 of a bowl of mangoes. Later, the queen got hungry and took 1/5 of the bowl of mangoes. The prince awoke and ate 1/4 of the bowl of mangoes. After, he came back and ate another 1/3. Obviously, he was hungry and ate

    asked on April 7, 2010
  30. Biology

    Okay, so in the Lab Assignment that I'm currently working on in AP Biology, there is a question that says: - What results would you expect if a dialysis bag were filled with glucose and iodine and then placed into a beaker of starch and water? Its a

    asked on October 22, 2008
  31. Sociology

    For question #3, reference the videos "History of the Most Cajun Place on Earth"and “Music & Culture in the Most Cajun Place on Earth” A) Briefly describe the formation of the Cajun culture as an American subculture in the context of historical events

    asked on January 29, 2016
  32. Algebra

    fifteen years ago Jane was x years old, and also Karen was one third(1/3) as old as Jane. a) Write down an algebraic expression for Karen's age fifteen years ago, in terms of x. - would it be x/3 b) write down an algebraic expression for Karen's age now,

    asked on September 10, 2016
  33. Math

    Xavier and $11.50 per hour working at the nearby grocery store last week Xavier worked for 13.5 hours how much money did Xavier and last week remember to round to the nearest penny I tried and tried but it is to hard for me I am 11 and I'm in 6th grade and

    asked on December 8, 2015
  34. College Geometry

    A tipi is a portable structure made of poles and covered in hides. Native American tipis varied in size and the number of poles used. A 12-pole tipi framework is shown in the following figure. The framework of a tipi lean toward the west so the apex was

    asked on December 1, 2014
  35. algebra 1

    the number of students attending the Fall play was 150 more than the number of adults attending. Student tickets cost $3, and adult tickets cost $5. A total of $4730 was collected. How many students attend the play?

    asked on September 21, 2010
  36. Grade 8 SCIENCE

    1. How is the vascular tissue in the stem different from the vascular tissue in the root? 2. Could you explain the relationships between seeds and fruits??

    asked on October 20, 2009
  37. social studies

    Help with Vietnam School Project? For our project we have to do interviews with people and then present them in a cool way. For example in past years someone made a helicopter with cardboard and put the interviews inside it. Another made a battlefield with

    asked on November 4, 2008
  38. Business Calculus

    Bill wants to fence in his rectangular garden so his precious produce will be protected. Three sides of the fence will be constructed with wire at $2 per linear foot and the fourth side will be constructed of wood fencing at a cost of 6$ per linear foot.If

    asked on November 2, 2015
  39. Theater

    I'm writing a play for theater, but I can't think of a good title. It's about a girl who runs away from a terrible life, but then she meets a guy who changes it all. Help? (:

    asked on January 11, 2012
  40. chemistry

    Calculate the volume of 6.00 moles O2 gas at 30cm Hg and 72 degrees farenheit, thanks.

    asked on August 8, 2010
  41. Chemistry

    For the following redox reaction, give the complete reduction half reaction. Na(s) + Al+3(aq) Na+1(aq) + Al(s) Please help asap!!

    asked on November 10, 2016
  42. Chemistry

    if 4.307 grams of water is decomposed by an electrical current how much oxygen gas will be produced?

    asked on November 5, 2016
  43. Chemistry

    if 7.653 grams of water is decomposed by an electrical current how much oxygen gas will be produced?

    asked on November 5, 2016
  44. Math

    You lean a 30 foot ladder against your house and it reaches exactly to the top. The ladder makes a 24˚ angle with the ground. How tall is your house? (I drew a picture of a house and the ladder)

    asked on January 7, 2015
  45. information Literacy

    1. Which of the following sets of Library of Congress call numbers is in the correct order? A. P201 .A251 1977, PE205 .C253 1954, PH202 .H255 1965, PA 203 .B252 1971 B. PE205 .C253 1954, PH202 .H255 1965, PA 203 .B252 1971, P201 .A251 1977 C. P201 .A251

    asked on June 26, 2013
  46. xeco/212

    I am having a horrible time coming up with an example of the "law of supply." Any suggestions would be helpful.

    asked on March 19, 2012
  47. accounting

    What are the different methods used to calculated depreciation? How does a company decide which method they should utilize? How does their choice affect the financial statements?

    asked on October 1, 2010
  48. Math 30 Trig

    How do I find the x-intercept of the graph of y=3sin 2x? Could you explain the steps to put this into my graphing calculator to get the graph. Please and thanks

    asked on April 25, 2010
  49. Math 30 transformations

    The question says Draw the reflection of f(x)=sqrt x-2 in the line y=x which I done but now I need to write the equation of the reflection in the form of y=g(x). I'm not sure how to write this equation using this form. Could you please help. Thanks

    asked on March 15, 2010
  50. Algebra 2

    The Question(s):: Write the polynomial 2-2x+5x^2-2x^5 in standard form. a.) What is its degree? b.)What is the leading coefficient? I missed this lesson in class. It's very confusing. Could someone please explain what to do? Much appreciated, Rae

    asked on November 5, 2007
  51. algebra2

    classify each system and determine the number of solutions: 5x-y=-3 and 15x-3y=-9

    asked on October 18, 2015
  52. Algebra 1

    How do you find the zeros? g(x) = x3 – x2 – 4x + 4

    asked on June 26, 2014
  53. chemistry

    How many grams of phosphoric acid can be made from 200 g of dichromate and 150 grams of hypophosphorous acid? (Performed in an acidic solution, Chromium III is one of the products)

    asked on October 10, 2012
  54. Informal Logic

    A conditional sentence with a false antecedent is always true false Cannot be determined not a sentence i believe it is true but unsure Please help me

    asked on June 3, 2012
  55. math

    If Ashante' got 21 questions correct out of 25, what percent went in the grade book?

    asked on February 8, 2012
  56. com/150

    Could you please tell me if this is a good thesis statement for an expository essay on the personal benefits and values that can be instilled from doing voluntary community service? The personal benefits and values that can be instilled from doing

    asked on November 16, 2011
  57. earth

    Can someone give me a better idea of Precipitation Variability ? and the 4 types of atmospheric lifting, I'm confused and want to understand this better. Convective Lifting Orographic Lifting Frontal Lifting Convergent Lifting

    asked on February 24, 2011
  58. algebra

    what is the height of a solid with a volume of 120 m3 and a base of 30 m2

    asked on October 27, 2010
  59. science

    what is the phsical layer of earth that is dividedunto tetonic plates is called the _____________

    asked on October 4, 2010
  60. Math Probability

    A new shipment of 9 VCRs, which will be offered at a very low price, are delivered, Unknown to the manager, 4 of the VCRs are defective, Determine the probability that at least 1 of the first three VCRs sold is defective.Did I do this right? 1-5C3/9C3

    asked on April 25, 2010
  61. Math 30 Trig

    For the equation 4 cos theta - sqrt12 =0, where 0< theta < or equal 2pi determine the measure of theta. One answer I got was 2pi/3, 4pi/3 and another time it totally different 5 pi/6, 7pi/6. Are either of these right if not HELP!

    asked on March 10, 2010
  62. American History

    I'm trying to write a term paper and get an A with as little effort as possible. Is it easier to write a paper that SUPPORTS Truman's decision to drop the A-bomb or REFUTES the decision?

    asked on February 6, 2009
  63. Writing

    Im doing an essay and Im going to write the name of a school. what do i put around it, quotation marks or capitalize it or underline the name?

    asked on August 23, 2007
  64. Algebra 2 help

    I don't have a calculator to solve these iterations... I really need help. The non-linear equation is f(x)= 4x - x^2 the intial value for the first one is 2.4 and 2.41 for the second one. Thank you so much!! f(2.4) = 4x - x^2 = f2(2.4) = 4x - x^2 = f3(2.4)

    asked on February 6, 2017
  65. Algebra 1

    Find the vertex for y= -x^2+1/2x+2 I could not figure out the vertex! Please help me!

    asked on April 6, 2015
  66. algebra 2

    a large table seats 12 and cost $50 , a small table seats 8 and costs $25, how many tables of each must be rented to seat 100 guests for $350, for the life of me , i cant remember how to do this.

    asked on September 10, 2013
  67. Math

    351 m2

    asked on June 4, 2013
  68. English

    Which sentence uses italics, quotation marks, and punctuation correctly? (1 point) “How many r’s are there in the word February”? “How many r’s are there in the word February?” asked Ty. “How many r’s are there in the word February,”

    asked on March 20, 2013
  69. Chemistry

    A block of metal has a width of 3.2 cm , a length of 17.1cm , and height of 5.8cm . Its mass is 1.5kg . Calculate the density of the metal.

    asked on September 29, 2012
  70. Logic

    A radical skeptic might be willing to doubt which of the following? 3 + 5 = 8 Grass is green. Cheese is fattening. All of the above I think it would be that cheese is fattening but not exactly sure. Please help!

    asked on May 27, 2012
  71. math

    Observe the first three sets of numbers to determine the missing value in the fourth set. Are you sure you know the value? {-5, 23, 12, 16} {1, 39, -14, 52} {17, 47, 42, -12} {25, ?, 11, 31}

    asked on April 11, 2012
  72. BUS/210

    Could you please explain to me what a business model is so that I might actually be able to grasp the concept. I am so lost. Thank you in advance for any assistance.

    asked on February 8, 2012
  73. Theater Arts

    I'm writing a play for theater, but I can't think of a good title. It's about a girl who runs away from a terrible life, but then she meets a guy who changes it all. Help? (:

    asked on January 12, 2012
  74. com/150

    How could I improve this thesis statement? “Most people do not feel it is their obligation or responsibility; however, there are personal benefits from community service.”

    asked on November 28, 2011
  75. 3rd grade math

    Explain how to compare 0.34 and 0.27?

    asked on June 6, 2011
  76. statistics

    Given 84 boxes of cereal with 22 high fiber,33 low fiber,and 53 high calorie. What is the probability of selecting a high calorie given high fiber? What is the probability of selecting a high calorie given low fiber?

    asked on May 28, 2011
  77. science

    what are two types of forces that effect motion?

    asked on February 3, 2011
  78. chemistry

    What is the pH of a solution that is .200M in acid and .500 m in the corresponding salt if the weak acid ka= 5.0x10^-7

    asked on September 2, 2010
  79. Math 30

    How would I do this question. What sample size was needed to obtain an error range of 2% if the following statement was made. 75% of the workers support the proposed benefit package. The results are considered accurate to within + or- 2%, 18 times out of

    asked on March 28, 2010
  80. Math 30

    One of the terms in the expansion of (x+3)^7 is kx^5. How do I determine the value of k.

    asked on March 21, 2010
  81. math 12

    How do I find the asymptotes of (y-2)^2 - x^2/4 =1 The center is (0,2)

    asked on March 17, 2010
  82. Piano lessons

    I have a daughter who is 4 years old. I would like her to learn how to play the piano. At what age should I sign her up for lessons? Thanks!

    asked on January 12, 2009
  83. Science

    What are the properties of plasma? I brought home the wrong school book and of course I forgot what the properties were. Thanks loads for the help. http://en.wikipedia.org/wiki/Plasma_(physics) Thanks a lot, it really helped. Next time Iwill pay attention

    asked on April 9, 2007
  84. Math

    If you get to pick a shape of a 20 mile perimiter what shape would be most efficient and why The shape's efficiency is determined by what you define efficency as: If you were trying to enclose the maximum area, a circle. If you were trying to plow with a

    asked on August 20, 2006
  1. math

    here are the questions for the modified geometry math test... i have some of them answerd so i will put my answers down 7) Which angle is vertical to

    posted on April 23, 2019
  2. SS

    Jay Bird is correct but number 15 is wrong... THAT'S THE ONLY QUESTION HE GOT WRONG. oh and thanks jay bird. :D

    posted on April 19, 2019
  3. scientific revolution

    THX SO MUCH Royale savage

    posted on April 19, 2019
  4. Social studies


    posted on April 18, 2019
  5. Math

    It's 100% D

    posted on April 10, 2019
  6. Science

    unit 3 lesson 6: what causes climate? (connexus) A B D C

    posted on March 29, 2019
  7. Science

    Lesson 4 unit 3 severe weather quiz (Connexus) 1. which of the following is correct description of a tornado, C (a violently rotating column of air in contact with the ground) 2. when water droplets in a cloud combine, become to heavy, and fall to the

    posted on March 28, 2019
  8. History

    OMG YO YO BRO U SAVED MY LIFE! i got 100%!

    posted on March 26, 2019
  9. LAnguage arts

    its A guys i took the test

    posted on March 26, 2019
  10. Social Studies

    the correct answer is B

    posted on March 7, 2019
  11. history

    i have no idea what the heck the answers are, can someone explain?

    posted on February 21, 2019
  12. Science

    Its, B C B A i got 100% on the quiz

    posted on February 19, 2019
  13. Math


    posted on October 11, 2018
  14. english

    its liking your anal??

    posted on May 24, 2018
  15. Quick calc question


    posted on February 20, 2018
  16. English

    I find it necessary that Ms. Sue posts every time someone banned from this website.

    posted on October 20, 2017