1. Pre-Algebra

    which of the following describes a situation in which a data set with a low mean absolute deviation is preferable? A. a car dealership sells cars at different prices B. a factory manufactures computers of different sizes and shapes. C. a food processing

    asked by Sara on April 11, 2016
  2. Trig(3 all with work)

    1)Find the exact value of cos 105 by using a half-angle formula. A)sqrt 2 - sqrt 3 /2 B)-sqrt 2 - sqrt 3 /2 C)-sqrt 2 + sqrt 3 /2 D)sqrt 2 + sqrt 3 /2 cos 105 cos 105 = cos 210/2 sqrt 1 + 210/2 sqrt 1 + sqrt 3/2 /2 sqrt 2 + sqrt 3/2 which is D 2)Find the

    asked by Jon on February 15, 2008
  3. Chemistry

    How would each of the following affect the Cr(VI) concentration determined in this experiment? Justify the answers with an explanation. In the experiment, absorption spectroscopy was used to obtain the concentration of Cr(VI) ions. 1) A student adds more

    asked by Sandy on March 2, 2014
  4. Chemistry: Check my answers please!

    How would each of the following affect the Cr(VI) concentration determined in this experiment? Justify the answers with an explanation. In the experiment, absorption spectroscopy was used to obtain the concentration of Cr(VI) ions. 1) A student adds more

    asked by Sandy on March 2, 2014
  5. Probability

    We have k coins. The probability of Heads is the same for each coin and is the realized value q of a random variable Q that is uniformly distributed on [0,1]. We assume that conditioned on Q=q, all coin tosses are independent. Let Ti be the number of

    asked by A on April 3, 2014
  6. home economics

    Use the Expenditure Equation for GDP (GDP = C + 1 + G + XN). Using your research skills, find the values for each sector for the years 1929 and 1933. Determine the percentage change for the two years. Explain the drastic change and what this meant for the

    asked by Anonymous on February 23, 2014
  7. Social studies

    What interferences can you draw from thr fact that china, with 1.4 billion people is the most populous country in the world? Canada's population of 34 million ranks 37th in the world. But how ate Canadians distributed across thr country?

    asked by Bella bell on January 4, 2012
  8. Psychology

    Like the popular belief that older adults do poorer in schools than their younger counterparts, the midlife crisis___________________. 1.is more accurate when describing an older population. 2.is more accurate when describing adolescents. 3.occurs more

    asked by Pete on July 31, 2011
  9. Math

    Exponential Growth It turns out that zombies are created by a virus. In 2025 there are 450 people infected by the virus and the number triples every week. The population of Canada is 3,500,000. How many sees will it take for all of Canada to be infected?

    asked by Emily on June 3, 2017
  10. STATISTICS

    What percentage of the general U.S. population has bachelor’s degrees? Suppose that the Statistical Abstract of the United States, 120th Edition, gives the following percentage of bachelor’s degrees by state. For convenience, the data are sorted in

    asked by Jake on June 3, 2010
  11. Economics Homework

    Use the Expenditure Equation for GDP (GDP = C + 1 + G + XN). Using your research skills, find the values for each sector for the years 1929 and 1933. Determine the percentage change for the two years. Explain the drastic change and what this meant for the

    asked by Miranda on July 8, 2010
  12. Health Care

    What are three issues faced by the aging population that you believe to be a problem? Why do you see these as problems? Are there any agencies in your community that address these problems? If so, what are they? If not, why do you think they are not being

    asked by Falguni Patel on April 15, 2010
  13. Statistics

    The ____________ is a hypothesis-testing procedure in which there are two separate groups at people tested and the population variance is not known. - t test for dependent means - t test for a single sample - t test for independent means - t test for

    asked by Trey on October 11, 2009
  14. Statistics- Math

    Assume that a random sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. n=550 x= 220, 90% confidence The margin of error E = (round to four decimal places)

    asked by Jessica Adamas on February 9, 2012
  15. world history

    What was the technology, agriculture, trade, religion/belief systems, gender roles, migrations, and population changes of the era of 600-1450 in the Middle East? What about in the 1450-1750? 1750-1914? 1914-present?

    asked by lauren on May 8, 2008
  16. CALCULUS

    9. Suppose an experimental population of amoeba increases according to the law of exponential growth. There were 100 amoeba after the second day of the experiment and 300 amoeba after the fourth day. Approximately how many amoeba were in the original

    asked by Anonymous on May 29, 2012
  17. Probability

    Consider 100 blood donors chosen randomly from a population where the probability of typer a is .40? What is approximate probability that at least 43 donors will have type blood?

    asked by Vishnu Priya on December 22, 2016
  18. biostatistic

    recent suggestion is 60 min of exercise per day. A sample of 50 adults in a study of risk factor report exercising a mean of 38 min per day with a standerd deviation of 19 min .based on sampal data, is physical activity significantly less than recommended?

    asked by nono on November 20, 2012
  19. math

    write the equation a) 250mg of a drug has a half life of 3 hours b) the population of acity with 34560 people growns 3% each year c) 100 people brought a new product the first month. the number of people who buy the product doubles every 5 months.

    asked by XOXOX on November 8, 2015
  20. College Algebra

    The logistic growth function f(t)= 100,000/5000e^-t describes the number of people, f(t), who have become ill with influenza t weeks after its initial outbreak in a particular community. A) How many people became ill with the flu after the epidemic began?

    asked by Devin on April 5, 2016
  21. Earth Science

    A student finds the density of an ice cube to be 0.80g/cm3; it is actually 0.90 g/cm3. What is the percent deviation (percent error) in this calculation? (1)6 percent (2)11 percent (3)13 percent (4)88 percent (2)?

    asked by Anonymous on June 18, 2008
  22. accounting

    Part D Note: This section is a continuation from Parts A, B, and C of the comprehensive problem. Be sure you have completed Parts A, B, and C before attempting Part D. You may have to refer back to data presented in Parts A, B, and C as well as use answers

    asked by Anonymous on March 30, 2008
  23. probability

    Let N,X1,Y1,X2,Y2,… be independent random variables. The random variable N takes positive integer values and has mean a and variance r. The random variables Xi are independent and identically distributed with mean b and variance s, and the random

    asked by juanpro on April 22, 2014
  24. Math

    There are 4 aces and 4 kings in a standard deck of 52 cards. You pick one card at random. What is the probability of selecting an ace or a king? Explain your reasoning. I am a bit confused on this one. Please help.

    asked by Patrick on March 28, 2018
  25. Chemistry

    Consider the reaction below : P4(s) + 5O2(g) P4O10(s) How many grams of phosphorus react with 1.195 x 102 L of oxygen (O2) at STP (standard temperature and pressure) to form tetraphosphorus decaoxide?

    asked by Rayan on February 15, 2018
  26. chemistry quick homework help

    A sample of Freon-12 (CF2Cl2) occupies 2.507 x 101 L at 291 K and 2.518 x 102 kPa. Find its volume (in L) at standard temperature and pressure (STP).

    asked by will.i.am on April 15, 2013
  27. Trigonometry

    I'm having trouble doing trigonometry. Determine the possible coordinates of a terminal point for each angle in standard position. A) 315° I have no clue how to do this. Please explain and show me the work so I can do the rest of the questions myself

    asked by Sarah on November 4, 2017
  28. Chemistry

    use the appropriate standard reduction potentials in the appendix of your book to determine the equilibrium constant at 285 K for the following reaction under acidic conditions 4H+(aq) + MnO2(s)+2Fe+2(aq)----> Mn+2 (aq)+2Fe3+(aq)+2H2O(l)

    asked by Olivia on April 22, 2016
  29. Physics

    Considering the diagram below, derive the standard formula for the second moment of area and radius of gyration for a rectangle of length L and breadth B about an axis through its centroid and parallel to the long edge.

    asked by Mawuli on May 2, 2011
  30. math

    There is a square whose vertices lie on a unit circle. Point P lies on the terminal arm of an angle in standard position, P(0.3420, 0.9397) how do you find the degrees of P?

    asked by s on December 16, 2008
  31. Chemistry

    use the appropriate standard reduction potentials in the appendix of your book to determine the equilibrium constant at 285 K for the following reaction under acidic conditions 4H+(aq) + MnO2(s)+2Fe+2(aq)----> Mn+2 (aq)+2Fe3+(aq)+2H2O(l)

    asked by Olivia on April 22, 2016
  32. Math Question

    Find the values of the six trigonometric functions of an angle in standard position where the terminal side is going through the point (-1, 1). Sinθ = Cosθ= Tanθ= Cscθ= Secθ= Cotθ=

    asked by Todd on December 4, 2014
  33. statistics

    Let A and B be constants such that A < B. Let z be a standard normal random variable. For what values of A does P(A

    asked by Jane on May 10, 2008
  34. algebra 2

    Two cards are randomly drawn from a standard deck without replacing the card after the first draw. Find the probability of drawing a spade followed by a heart. Please type your answer as a fraction.

    asked by Thomas on May 21, 2010
  35. Economics

    Which of the following is a characteristic of a traditional economy? A. It encourages innovation and change. B. It is usually based on light industrial production. C. It has a high standard of living. D. It revolves around the family unit.

    asked by Ella on December 6, 2012
  36. introduction to health care

    which of the following statements is true a.doctors are held to the same reasonable person standard as the general public b. professional standards cans determine if negligence has occurred my answer is b

    asked by susue on November 17, 2013
  37. pre calc

    The terminal side of an angle in standard position goes through the poin (-2,5). Find the values of the 6 trig function sin cos tan csc sec cot

    asked by jaz on April 2, 2009
  38. physics

    (a) Neglecting air resistance, how fast is the object traveling when it strikes the ground at the end of 2.0 s? First used standard British units and then express the speed in mi/h for a familiar comparison

    asked by Anonymous on June 15, 2012
  39. chemersty

    Calculate the value of the following in exponential form, using standard scientific or "e" notation (for example, 105 = 1.05e2). Enter your answer with the correct number of significant figures. 885.75 g + 10.151 g - 25.50 g

    asked by ellen on September 10, 2011
  40. college chemistry

    Use standard enthalpies of formation to determine ƒ¢Horxn for: 2NH3(g) + 3O2(g) + 2CH4(g) ¨ 2HCN(g) + 6H2O(g) in kilojoules. Find the change in internal energy for this reaction in kJ

    asked by jake on October 18, 2010
  41. Chemistry

    K1 = 0.727 K2 = 12.1 T1 = 2000 T2 = 3000 Solve for the standard enthalpy of formation. They gave me the formula ln(K2/K1) = DeltaH /R (T2 - T1 / T1T2) The answer is supposed to be in KJ/mol and I keep getting 2.022 but its not right. I'm not sure what Im

    asked by Katie on March 24, 2013
  42. maths

    my daughter studying in 2nd standard this is the project work i don't understand, please show me the answer. make a chart to represent nos 1-15 using small objets

    asked by steffy on May 18, 2011
  43. Chemistry

    2CO(g) + O2(g) 2CO2(g) Go = -511.6 kJ and So = -173.1 J/K at 314 K and 1 atm. The maximum amount of work that could be done by this reaction when 2.43 moles of CO(g) react at standard conditions at this temperature is__________ kJ. how?!

    asked by Bryan on April 26, 2012
  44. MATH - Standard Form

    Mohammed copied this problem into his notebook. (3.4x10^5)(3.8x10^-9) A. Use the associative and commutative properties to rearrange the factors. B. Find the product and write it in standard form.

    asked by andra on November 20, 2013
  45. chemistry

    the standard free energies of formation of SO2(g) and SO3(g) are -300.4 and -370.4kJ mol-1 respectively. Calculate the value of the equilibrium constant at 25'C for the reaction 2SO2(g)+O2(g)==>2SO3(g)

    asked by harry on February 12, 2013
  46. Chemistry

    2C6H6(l) + 15O2 (g) ---> 12CO2 (g) + 6H2 (l) Calculate the deltaHrxn using standard heats of formations from Appendix C, paying close attention to the physical states of substances. Thanks!

    asked by Julio on April 30, 2012
  47. Math

    A rental agency claims that the average rent that small business establishments pay in Suva city is $800. A sample of 10 establishments shows an average rate of $20. At alpha = 0.05, there enough evidence to reject the agencies claim? Assume that the

    asked by Krish on October 25, 2014
  48. medicine

    What is a quality-adjusted life year? How can it be used to compare differences in health status between someone who is healthy and someone who is not? Can it be used to compare health outcomes of someone who is ill with someone who has died? Indicate at

    asked by Nicodeme Kombet on January 31, 2011
  49. Ap world history

    I population increase and East Asia and South East Asia during this timeframe was due in large part to.. A) The lack of wars B)The growing respect for a woman C) The spread of Buddhism,hey religions that encourages procreation D) The development of a

    asked by Brenda on September 16, 2015
  50. History

    Please check! 1. What was the effect of the rise of unions in the late 1800s? a. The population in cities quickly grew.*** b. South Carolina developed many unions prior to World War I. c. Workers had more bargaining power with management. d. Living

    asked by SpitFireRedHead on March 20, 2016
  51. SCI 275 week 9 capstone question

    If you were an environmental researcher and were giving funding to assist with one environmental issue, which one of the following topics would you choose to spend your funds on? Human Population Atmospheric Pollution Water Resources Terrestrial Resources

    asked by Anonymous on October 12, 2011
  52. history

    which of the following was a law established by the northwest ordinance? A.only territories with a population of at least 60,000 can apply for state hold B.the education would be paid for by the central government. C.anyone who escapes slavery would be

    asked by Anonymous on October 17, 2016
  53. statistics

    An online site presented this​ question, 'Would the recent norovirus outbreak deter you from taking a​ cruise?' Among the 34 comma 203 people who​ responded, 66% answered​ 'yes'. Use the sample data to construct a 90​% confidence interval

    asked by Roberts on September 7, 2015
  54. statistics

    You intend to estimate a population proportion with a confidence interval. The data suggests that the normal distribution is a reasonable approximation for the binomial distribution in this case. Find the critical value that corresponds to a confidence

    asked by robyn on July 22, 2012
  55. statistics

    the assets (in billions of dollars)of the four wealthiest people in a particular country are 46,34,12,10. Assume that the samples of size 2 are randomly selected with replacement from this population of four values. After listing the possible sample and

    asked by nannie on December 20, 2011
  56. statistics

    focus groups of 11 ppl are randomly selected to discuss products of the yummy company .it is determined that the mean number (per group)Who recognize the yummy brand name is 7.8,and the deviation is 0.97.would it be unusual to select 11 people and find

    asked by AILY on December 5, 2009
  57. Math

    Part of the population of 4,750 elk at a wildlife preserve is infected with a parasite. A random sample of 50 elk shows that 3 of them are infected. How many elk are likely to be infected?

    asked by Ja'Quavius on November 15, 2018
  58. statistics

    A poll claims that 70% of the population is for a new amendment. A random sample of 49 people showed that 27 voted in favor of the new amendment. Give a 95% confidence interval. Give lower limit and upper limit accurate to four decimal places

    asked by robert on March 29, 2012
  59. social studies

    Why did New Orleans need protection during the War of 1812? a) to keep the British from controlling the Mississippi River and trade through the port of New Orleans b) to control the Native American population c) to keep France from taking Louisiana back d)

    asked by victoria on December 30, 2013
  60. math

    Use Hamilton's plan to apportion the new seats to the existing states. Which state illustrates the Alabama paradox? Assume that the populations are in thousands. 1 State A B C D E Population 300 701 800 700 800 Number of seats 82

    asked by Anonymous on September 11, 2012
  61. fragmentation

    fragmenation. From what I read, this is what i understood. Fragmentation is the process of seeing a whole in parts and each part represents something symbolic? For example, in The love of J. Alfred's Prufrock, Prufrock fragments the population into people

    asked by jen on March 19, 2009
  62. science

    Population distribution describes the ________.? a) immigration of people from one nation to another b) wanderers who move from place to place c) relation of people to the physical features and to each other d) migration of people from one geographical

    asked by pam on September 8, 2010
  63. statistics

    As a manager for an advertising company, you must plan a campaign designed to increase Twitter usage. A recent survey suggests that 85% of adults know what Twitter is. How many adults should you survey in order to be 90% confident that your estimate is

    asked by e on November 13, 2016
  64. Biology 30

    In what size populations might you expect it to be relatively common for alleles to become fixed? Why? I think that larger populations would be more likely to have fixed alleles, since perfect Hardy-Weinberg equilibrium states that there will be no change

    asked by Erika on May 23, 2014
  65. chemistry

    if 24.25 mL of a standard M NaOH solution is required to neutralize 26.00 mL of H2SO4, what is the molarity of the acid solution?

    asked by james on November 3, 2008
  66. Chemistry

    If 38.33 mL of a standard 0.1667 M Ba(OH)2 solution is required to neutralize exactly 52 mL of H2SO4, what is the molarity of the acid solution?

    asked by Beatriz on February 12, 2012
  67. Geometry

    What is the probability of drawing three red cards, one at a time without replacement, from a standard deck of 52 cards?

    asked by me on August 7, 2014
  68. math

    change 64 square meter into square millimeter. give your answer in standard form

    asked by niita on February 28, 2012
  69. 9th grade

    two of the forms of a linear equation are standard form and slope-intercept form. explain when each one is more useful

    asked by Donna on August 26, 2010
  70. Algebra2

    Check? Write the standard form of the equation of the circle with the given center and radius. 14. center (-2, 0) and r = 3 =18

    asked by Nessa on November 29, 2012
  71. chemistry

    a 15-gram sample of a gas has a volume of 30 liters at standard pressure. what is the densty of the gas

    asked by pita on December 14, 2010
  72. math

    find the standard form of the equation of the line that satisfies the given condition. x-intercept: -4 y-intercept: 2

    asked by anonymous on October 1, 2008
  73. algebra 1

    can someone please help me solve the question and explain to me and also show me specifically what to do step by step??? Q: what is the standard form of Y-8=2(x+2)?

    asked by Catarina on November 9, 2013
  74. early chilhood

    If an early childhood teacher were to learn a second language along with learning Standard English, what language should it be?

    asked by betsy on April 4, 2013
  75. Mathematics

    1.What is 10^3 written in standard form 10 100 1,000 10,000 Please check this, my answer will be the third choice

    asked by Valerie on September 22, 2017
  76. Math

    Find the equation of the circle that passes through the origin and x-intercept 1 and y-intercept 0. (standard form again)

    asked by Anonymous on February 6, 2010
  77. Precalc

    i need help with this equation anything help will be greatly appreciated find the standard equation of a parabola with a focus (-2,0) directrix x=3

    asked by Natali on November 13, 2009
  78. Chemistry

    A cell has a standard emf of +0.177 V at 298 K. What is the value of the equilibrium constant for the cell reaction a) if n=1? b) if n=2?

    asked by Summer on April 8, 2013
  79. math

    5 cards are drawn at random from a standard deck of playing cards. What is the probability that all are the same suit?

    asked by Derrick on May 14, 2012
  80. Linear Algebra

    Let u and v be vectors in R^n, and let T be a linear operator on R^n. Prove that T(u) dot T(v) = u dot v IFF A^T = A^-1 where A is the standard matrix for T.

    asked by romulo on March 7, 2007
  81. Math

    Write each equation in standard form. 1.y-3=-2.4(x-5) -The answer I got was 2.4x + y = 15. Could someone please check my answer and tell me how to solve it if it wrong? Thanks

    asked by Shadow on August 21, 2010
  82. statistics

    without the use of the standard normal tables, should techniques of calculus be used to find the probabilities concerning a normal distribution?

    asked by marie on August 20, 2010
  83. Chemistry

    For each of the compounds below, exlain why they do not have the same value for their standard heat of vaporization. 1. Propane and propanone 2. Propanone and 1-propanol

    asked by Allie on January 27, 2008
  84. Alg 3

    Put the following equations in standard form. State the center and the radius. x^2-5x+y^2+4y=-3 I get how to end up with (-2.5,2), what is the radius?

    asked by Shelby on April 3, 2013
  85. MATH ANALYSIS

    If (96,2) is a point on the terminal side of an angle THETA in standard position, what is the value of sin THETA? How do i do this?

    asked by anonymous on January 10, 2010
  86. Algebra 2

    write the polynomial in standard form then name the polynomial based on its degrees and number of terms 6x^2 + 6x^4 - 2x^2

    asked by PLS HELP ME! on May 14, 2019
  87. chemistry

    why we use phenolphthalein indicator in the determination of the strenght of NAOH by using standard oxalic acid why not the others indicator?

    asked by sbr on June 25, 2013
  88. Math

    A standard six-sided dice is repeatedly rolled until it lands on a two. What is the probability that the first two is rolled after the first six rolls?

    asked by Plz help on May 13, 2019
  89. Algebra

    Think we have it but want to make sure Write the standard form of the equation of each line using integers. 1. Y=-8/5x-4 Answer 8x+5y=-20 2. 4y=12+3x Answer -3x+4y=12 Thanks

    asked by Mom on November 15, 2015
  90. Math probability

    What is the probability that a randomly drawn 6-cards hand from a standard deck.... B) contains at least four clubs? C) contains at most three clubs?

    asked by James on December 18, 2012
  91. chemistry honors

    Assuming standard pressure, at what temperature is there an equilibrium between water vapor and liquid water?

    asked by mike on April 5, 2011
  92. Math for liberal arts

    4. What is the probability of selecting either a King or a Queen if one card is drawn from a standard 52 card deck?

    asked by KeKe on September 5, 2012
  93. Probability

    The probability of drawing a red Jack or red Queen from a standard deck of cards is...? 1/13, 12/13, 4/13, or 9/13?

    asked by Anna on January 1, 2010
  94. Statistics

    Find the probability a five card hand chosen from a standard 52 card deck has at least three spades.

    asked by Austin on September 15, 2018
  95. math

    Find the standard form of the equation of the circle with the given characteristics. Center: (5, -2); point on circle: (-3, -4)

    asked by mary on May 26, 2018
  96. math

    A standard die is rolled three times. What is the probability that a prime number is rolled on exactly one of the three rolls?

    asked by jake on April 28, 2013
  97. math

    8 cards are drawn from a standard deck of cards with replacement let X=no of diamonds observed find P(X=3)

    asked by virginia on October 3, 2012
  98. statistics

    for a six-sided standard die is the event "less than 3" and the event "greater than 3" complimentary, mutually exclusive, or both. I think they are both but not sure

    asked by eric on January 12, 2010
  99. Algebra

    Write a quadratic equation in the variable X. Write in standard form: ax^2+bx+c=0 using 3 as the only solution. Cheers!

    asked by Angela on May 1, 2012
  100. Statistics

    There are 200 students in a sample. How many of these students will have scores that fall under the score of 41? Mean is 45, standard dev. is 4.

    asked by Vicki on November 15, 2011