Questions Asked on
July 15, 2011

  1. math

    Calculate the consumers' surplus at the indicated unit price p for the demand equation. HINT [See Example 1.] (Round your answer to the nearest cent.) p = 150 − q; p = 30

    asked by louis
  2. chemisrty

    Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt). 2Na(s) + Cl2(g) 2NaCl(s) If 3.6 moles of chlorine react with sufficient sodium, how many grams of sodium chloride will be formed?

    asked by amy
  3. Calc

    When pi/2

    asked by Leanna
  4. chemistry

    How many grams of CuCl2 are required to make 75 mLof a 0.20M solution?

    asked by ashley
  5. science**

    many birds eat butterflies for food. however, the monarch butterfly has a bad taste and is therefore avoided by birds. the viceroy butterfly looks very much like monarch butterfly, but it does not taste bad to the birds. tiger swallowtail butterflies do

    asked by Anonymous
  6. chemistry

    How many grams of KMnO4 should be used to prepare 2.00 L of a 0.500M solution?

    asked by ashley
  7. Math-Algebra 1

    The price of a gallon of unleaded gas has dropped to $2.80 today. Yesterday's price was $2.87 . Find the percentage decrease. Round your answer to the nearest tenth of a percent.

    asked by EmilyS.
  8. Physics

    A 10kg ball ‘A’ moving at a speed of 8m/s collides with a 20 kg ball B initially at rest. After The collision, the balls A and B move along the direction of 30 & 45 respectively with the initial direction of motion of A. Find the final speed of balls A

    asked by Shrawan
  9. science**

    which of the following situations would be mist similar to an electrical current passing through a metal wire in a closed circuit? A. hot water moving through a pipe B. an automobile traveling through a tunnel C. an airplane flying through clouds D. a

    asked by Anonymous
  10. science**

    what is the best course of action to follow after receiving a preliminary weather advisory of hazards such as tornadoes, hurricanes, or serve storms? A. evaluate your home after disconnecting water and gas lines B. move into a basement or cellar with

    asked by Anonymous
  11. Physics

    A horse pulls on a crate with a 1,000 N force, causing it to move at constant velocity. What is the acceleration of the cart? A 44-kg child steps onto a scale. What is the magnitude of the force that the scale exerts on the child

    asked by Kandi
  12. science**

    which of the following situations would be mist similar to an electrical current passing through a metal wire in a closed circuit? A. hot water moving through a pipe B. an automobile traveling through a tunnel C. an airplane flying through clouds D. a

    asked by Anonymous
  13. Math-Algebra 1

    Pablo has scored 64, 77, and 82 on his previous three tests. What score does he need on his next test so that his average (mean) is 79?

    asked by EmilyS.
  14. science

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

    asked by Toni
  15. Math

    Write the compound statement in symbols. Let r = The food is good, p = I eat too much, q = I'll exercise. If the food is good and I eat too much, then I'll exercise.

    asked by Jen
  16. chemistry

    What volume of 0.25M solution can be made from5.0 gof KCl?

    asked by ashley
  17. englirsh

    what is the function of the expression what made her choose me

    asked by ridwan
  18. Chemistry

    which of the following quantities is not required to calculate the amount of heat energy required to heat water from 25^OC to 55^OC? A-the mass of water sample. B-the initial temp. C-the heat of vaporization for water. D-the final temp. E-the specific heat

    asked by John Height
  19. Physics

    A charge q =+ 4.11 x 10 - 9 C is placed at the origin, and a second charge equal to -2q is placed on the x axis at the location x = +1.00 m. (a) Find the electric potential midway between the two charges. (b) The electric potential vanishes at some point

    asked by Chloe
  20. Physics

    In successive experimental measurements, the refractive index of a glass turned out to be 1.54, 1.45, 1.53, 1.56, 1.44, 1.54. Calculate: i. Mean refractive index ii. Mean absolute error iii. Fractional error iv. Percentage error

    asked by Shrawan
  21. biology

    How is bacterial cell different from an onion peel cell ?

    asked by flash
  22. Math-CONFUSING!!

    Write the compound statement in symbols. Let r = The food is good, p = I eat too much, q = I'll exercise. If the food is good and I eat too much, then I'll exercise.

    asked by Jen
  23. science: chemistry

    When a sample of potassium nitrate is heated, oxygen gas is produced. This gas, collected in a 750 milliliter flask, has a pressure of 2.8 atmosphere and the temperature is recorded to be 53.6°C. How many moles of oxygen gas are produced in this reaction?

    asked by Jane Doe
  24. science: chemistry

    How much faster will neon effuse than krypton, given that the molar mass of krypton is 83.8 grams and that of neon is 20.18 grams?

    asked by Jane Doe
  25. Physics

    An automobile travelling with a speed of 60km/hr, can apply brake to stop within a distance of 20m. If the car is going twice as fast then calculate the stopping distance and stopping time? (b) Given R1 = 5.0 ± 0.2 and R2 = 10.0 ± 0.1. calculate the

    asked by Shrawan
  26. biology

    in what way are chloroplast and mitochondria

    asked by flash
  27. MATH


    asked by SANDY
  28. College Algebra

    A farmer has 100 yeards of fencing with which to enclose two adjacent rectangular pens both bordering a river. The farmer does not need to fence the side with the river. What should the dimensions of the two pens together (a rectangle) be in order to yield

    asked by Melanie
  29. Physics

    A particle of mass 1.6 x 10-27 kg is revolving on a circular path of radius 10cm under the Influence of a centripetal force of 2.5 x 10-12. Find out the angular velocity?

    asked by Shrawan
  30. Algebra

    An initial investment of $1000.00 is appreciated for 5 years at 15% interest compounded semiannually. How much money is in the account after the period ends?

    asked by Kim
  31. reading

    lines 44, 48, 54, and 60: 44-It had to smell like oil, like metal and often like the sacks of fertilizer stacked in the back room 48-it had to have unstained wood floors, sometimes sprinkled with sawdust, and high cabinets bolts, screws, nails, and small

    asked by Anonymous
  32. math

    Solve the following system of equations using matrices x = -2y + 6 2x + 2y = 16

    asked by kailin
  33. Resources for Educating young Children Part 2

    I was wondering if someone could please help? My questions are: 5. Which one of the following statements about adapting a curriculum to children with learning differences it true? a) when teaching mathematics, always try to relate the concept to its use in

    asked by beth
  34. biology

    in what way are chloroplast and mitochondria similar ?

    asked by flash
  35. Math

    An artifact was found and tested for its carbon-14 content. If 88% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years. ? yr

    asked by Lee Ann
  36. ethics and values

    1.What is egoism? What is psychological egoism? What is the difference between the two? 2.What is the difference between utilitarianism and egoism? Need some ideas

    asked by Steph
  37. Physics

    A centrifuge is a device in which small container of material is rotated at a high speed on a circular path. Such a device is a used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum

    asked by Kelli
  38. algebra II

    $9000 is invested at 8% compounded quarterly. In how many years will the account have 20) grown to $11,000? Round your answer to the nearest tenth of a year.

    asked by Anonymous
  39. algebra 2

    log 5 ã5 log7 (1/49)

    asked by sky
  40. algebra 2

    What will be the amount in an account with initial principal $6000 if interest is compounded continuously at an annual rate of 3.25% for 9 years?

    asked by Anonymous
  41. Physics

    A centrifuge is a device in which small container of material is rotated at a high speed on a circular path. Such a device is a used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum

    asked by Kelli
  42. geometry

    triangles ABF and EDG are congruent. triangles ABF and GCF are equalateral. AG = 24 and CG = 1/5 AB. find the total distance from A to B to C to D to E

    asked by jordan
  43. Organic Chem

    You have a bottle of cyclohexane and a bottle of cyclohexene, but they are unlabelled. Which of the following reagents would be the best choice to use to distinguish which was which? a. KOH/H2O b. KOH/CH3OH c. CH3ONa/CH3OH d. CH3CH2ONa/CH3CH2OH e.

    asked by Carol
  44. biology

    in what way are chloroplast and mitochondria similar ?

    asked by flash
  45. algebra 2

    Rewrite as a single logarithm. 5 logb m -6/5 logb n +1/3 logb j - 2 logb k

    asked by kyle
  46. algebra

    10 cm^3 of a normal specimen of human blood contains 1.2 g of hemoglobin. How many grams does 17 cm^3 of the same blood contain?

    asked by tim
  47. Math

    Determine which, if any, of the three statements are equivalent. Give a reason for your conclusion. I) If the garden needs watering, then the garden does not need weeding. II) Either the garden needs watering or the garden does not need weeding. III) If

    asked by Jen
  48. math

    can please somebody check my answer: Q. A tuning fork produces a sound that has a wavelength of 136 centimetres. What is the frequency of the tuning fork? (Take the speed of sound to be 340 metres per second.) A. f= velocity/wavelength f= 340/1.36 f=250Hz

    asked by Roger
  49. geometry

    find m

    asked by lisa
  50. biology

    1 mole of an element or compound contains 6.20 times 10 to the 23rd power atoms or molecules of the element or compound. 1 mole of an element or compound has a mass equal to its mass number (or molecular weight) in grams. For example, 1 mol of hydrogen gas

    asked by melly
  51. math

    List the terms, coefficients, and degree of the following polynomial: 7x^4 – 3x^2 + 5x + 2/3 Can someone help me with this please. Thank You! :)

    asked by Ashley
  52. Organic Chem

    I had posted this question yesterday morning at 4:58am. Any possibility someone can help? I just completed a lab called "Acid-Catalyzed Dehydration of an Alcohol: Synthesis of 2-Octenes." I started with 2-octanol and the lab instructions said the product

    asked by Carol
  53. geometry

    A square measures 18feet 6inches in length. If an octagon is inscribed in the square, then how long should each side of the octagon be?

    asked by Cathy
  54. Math

    Multiply: Try to recognize the type of product to be multiplying. (x-4x^3)^2

    asked by Ms.Ellis
  55. Math

    Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.19 10-6 watts/cm2 D= ? db

    asked by Lee Ann
  56. Math

    If the argument below is valid, name which of the four valid forms of argument is represented. If it is not valid, name the fallacy that is represented. If I catch the bus on time, then I am not late to work. If I am not late to work, then I will get a

    asked by Jen
  57. Chemistry 2

    An aqueous solution of CuSO4 has a density of 1.3g/ml and is 1.16 molal. Calculate the Molarity of this solution.

    asked by Kelci
  58. Math

    Create a Euler diagram to determine whether the syllogism is valid or invalid. Some musicians stay up late. Greg is a musician. Greg stays up late.

    asked by Jen
  59. Math-this 1 is confusing :(

    Given p is true, q is false, and r is false, find the truth value of the statement (q ^~r) ->~p.

    asked by Jen
  60. biology

    a student used water as a medium in a temporary blood stick. he could observe only ruptured cell under microscope. why doese this happen ? plzzzz tell flash.

    asked by flash
  61. Physics

    A charge +Q and -2Q were placed on first and third of three very large parallel plates. The middle plate is earthed. Find the chargeon right extreem plate

    asked by Arjun
  62. computers/it

    2011-07-15 18:30:34: DB Settings - ORACLE_HOME was located and set to E:\ORACLE\ORA92 2011-07-15 18:31:04: Failed to connect to DBSettings Service instance 2011-07-15 18:31:04: Failed to connect to the settings service, aborting login...

    asked by herbert
  63. Math-Algebra

    Consider the line 9x+4y=-9 What is the slope of a line parallel to this line? What is the slope of a line perpendicular to this line?

    asked by EmilyS.
  64. math

    Shark teeth are shape like a triangle. The height of a certain shark is 2cm longer than the base. The area is 24cm^2. Find the height and base

    asked by Pebbles
  65. Health

    I am having trouble understanding this. I am writing a paper on childhood obesity and I am to cover the following: Ethical and legal considerations How population characteristics influence vulnerability. Could you put in simpler terms. Thank you.

    asked by Casey
  66. Math

    The half-life of 234U, uranium-234, is 2.52 105 yr. If 97.7% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed? ? yr

    asked by Lee Ann
  67. Math

    Determine the exact value of: sin30° + cos225° + sin150° + cos330°

    asked by Kate
  68. Math

    Determine which, if any, of the three statements are equivalent. I) If the carpet is not clean, then Sheila will run the vacuum. II) Either the carpet is not clean or Sheila will not run the vacuum. III) If the carpet is clean, Sheila will not run the

    asked by Jen
  69. MATH

    cos(x)=2 and sin(x)=5 Thanks for your previous answers mathmate. No. It's not a typo. I was wondering if someone could explain to me when in real life would I need to solve such problems, or similar, besides answering problems from a textbook. When ever I

    asked by George
  70. algebra

    dr Jones saw 824 patients on the first year of his practice, the second year he saw 1024 patient, what would be the increase in ratio????

    asked by flora morio
  71. Physics

    How does an object's speed affect its aerodynamics. How can these aerodynamics be optimized?

    asked by Capreeca
  72. English

    1) My sister is going to spend three weeks, from 4 August to 24 August in the USA. 2)In particular, they will be visiting Disneyworld first, then they'll be flying to Yellowstone Park and finally they will round off (?) their journey with a three-day stay

    asked by Henry2
  73. expo 105

    true or false The students as well as their teacher are excited about the up coming trip to italy

    asked by lucetia
  74. 218

    Engage in some Internet-based research on the relationships between the technical production aspects of film and television. What specific visual film techniques do you see utilized in contemporary television

    asked by meshelle
  75. geometry

    Find m

    asked by lisa
  76. MATH

    2+3x10 DIVIDED BY 5x3-9= ????

    asked by SANDY
  77. MATH


    asked by SANDY
  78. MATH

    SIMPLIFY: 2+3x10/5x3-9=???

    asked by SANDY
  79. HSM260

    Forecast personnel expenses for fiscal year 20X5 using moving averages, weighted moving averages, exponential smoothing, and time series regression. For moving averages and weighted moving averages, use only the data for the past three fiscal years. For

    asked by Lisa
  80. Math

    Construct a truth table for (p ^q) ->~q

    asked by Jen
  81. anatomy and physiology 1

    describle two vision disorders that cause abnormal eyeballshape.

    asked by erica
  82. Psychology/Statistics

    For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size - 3. Use the formula sqrt(N^ 2/S)

    asked by Dawn
  83. Psychology/Statistics

    For each of the following samples that were given an experimental treatment test whether these samples represent populations that are different from the general population (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

    asked by Dawn
  84. algebra 2

    Use the properties of logarithms to evaluate the expression. 5 log5 (7x)

    asked by Anonymous
  85. Math

    Divide and Check 4x^4y-8x^6y^2+12x^8y^6 _______________________ 4x^4y

    asked by Ms.Ellis
  86. algebra 2 logaithms

    Use the properties of logarithms to evaluate/simplify the expression. 1. 5^log(7x) 2. 10^x + 2 log(x)=x+2 or log(x)=x-2 ????

    asked by Anonymous
  87. precalc

    How would you find the inverse of these two functions: f(x)=4/(x-4)^2 and f(x)=x^2-8x+16 could you please show me step by step i have been trying to figure it out for hours.

    asked by Diana
  88. Math

    Write the argument below in symbols to determine whether it is valid or invalid. State a reason for your conclusion. Specify the p and q you used. Either the gazebo is made of wood or the vine is growing on the gazebo. The gazebo is not made of wood. The

    asked by Jen
  89. College Math

    Given the following sets select the statement that is NOT true. A=(l,a,t,e,r) B= (l,a,t,e) C=(t,a,l,e) D=(e,a,t)E=(t,e,a) E=D E=B D=A C=A D=B

    asked by Janet
  90. Math

    Fill in the heading of the following truth table using any of p, q, ->, ?, V, and ^. P q _____ T T T T F F F T T F F T

    asked by Jen
  91. Math

    Construct a truth table for ~q ->(p V q)

    asked by Jen
  92. Math-Please help :(

    Construct a truth table for the statement. (p ↔ q) → p

    asked by Jen
  93. Math

    Multiply: (7x-2)(2x-7)

    asked by Ms.Ellis
  94. math

    divide in the indicated base 2 base 3/ 120 base 3

    asked by Anonymous
  95. science: chemistry

    What is the temperature of a 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals?

    asked by Jane Doe
  96. physics

    Drive an expression to calculate the tension and velocity in the motion of a vertical Circle at the 1: highest point and 2: lowest point?

    asked by Shrawan
  97. arithmetic

    5+(9-5)3(exponent)= 5+12=17 Is this right? When doing the practice problems I was getting the wrong answer. This is so simple, I don't get what I am not understanding...

    asked by Anonymous
  98. science

    is it true that When two identical waveforms of the same frequency are added together, the result will be a waveform with a wavelength that is twice that of the individual waveforms.

    asked by Roger
  99. stuck

    Describe the protocols and server software for your Microsoft server environment that will enable secure file transfer uploads and downloads for your end users and secure remote terminal access for your own remote maintenance tasks.

    asked by jon
  100. science

    if we put a branch of any plant in coloured water thenwhat happened?if it change its color then why it happened tell the reason

    asked by wali
  101. Science

    Were can i find a coloured diagram of a aluminum-nickel electrochemical cell?

    asked by Claire
  102. chen

    1-why should the maximum percent yield never be above 100%?

    asked by lisa
  103. Stats

    a raw score on a particular intelligence test is known to be approximately normally distributed in a population of 4th graders, with a mean of 95 and variance 81. which score has the property that there are 15% of scores in the population that are above

    asked by Jason
  104. math

    Find the first three terms of the series.

    asked by AJUDE ELVIS
  105. math


    asked by flora morio
  106. principles of management

    the meaning of organizational subsitence and how it can be identified

    asked by evelyne