Questions Asked on
July 20, 2015

  1. chemistry

    Arrange the following aqueous solutions in order of decreasing freezing points (lowest to highest temperature): 0.10 m Na3PO4, 0.35 m NaCl, 0.20 m MgCl, 0.15 m C6H12O6 and 0.15 m CH3COOH.

  2. math

    A piece of carpet is 8 feet wide and 12 feet long. The carpet needs to be reduced by a scale factor so that the reduced carpet is 2 feet wide. What is the area of the reduced carpet?

  3. College Algebra

    If g(x) = x2 + 6x with x ≥ −3, find g−1(55) I need help solving this problem this is an example but it does not thoroughly is explained. :/

  4. math

    A rectangular rug is 12.5 feet long and 10 feet wide. The rug needs to be reduced by a factor of es026-1.jpg to be placed near a door. What is the area of the reduced rug in square feet?

  5. math

    A room is 12 feet long and 10.5 feet wide. A scale model of the room is 3.5 feet wide. What is the area of the scale model? 10.3 square feet 14 square feet 36 square feet 122.5 square feet

  6. Math

    My hundreds digit means nothing. Six more than my hundreds digit is my thousands and one less than my thousands is my ten thousands. My tens digit is four more than my hundreds and ones digit is five more than my tens digit. my ans: 5,6049

  7. Math

    My hundreds digit is the last odd number. Five less than my hundreds digit is my ones and my tens digit is two more than my ones digit. My thousands digit is three less than my hundreds digit. my ans: 6964

  8. math

    The scale model of a rectangular garden is 1.5 ft by 4 ft. The scale model is enlarged by a scale factor of 7 to create the actual garden. What is the area of the actual garden? 6 42 252 294

  9. math

    The scale model of a rectangular patio will be enlarged by a scale factor of 2.5 to create the actual patio. The actual patio will be 15 feet by 20 feet. Which is the area of the scale model? 48 square feet 60 square feet 120 square feet 300 square feet

  10. Math

    My tens digit is the lowest even number. My hundreds digit is six more than my tens digit and my ones digit is one more than my tens digit. My thousand digit is the second odd number. my ans: 2601

  11. math

    The area of the scale model of a playground is 6 square yards. The scale model is enlarged by a scale factor of 3 to create the actual playground. What is the area of the actual playground? 18 square yards 54 square yards 108 square yards 324 square yards

  12. math

    A scale model of a rectangular building lot measures 7 feet by 5 feet. If the actual house will be built using a scale factor of 12, what is the area of the actual building lot?

  13. physics

    A golf cart has an acceleration of 0.4 m/s². What is its velocity after it has covered 10 m starting from the rest?

  14. chemistry

    A 30.0 g sample of water at 10.0°C is mixed with 50.0 g of water at 57.0°C in a calorimeter. Calculate the final temperature of the mixture

  15. English

    We had to read Kennedy's Inaugural Speech: Vice President Johnson, Mr. Speaker, Mr. Chief Justice, President Eisenhower, Vice president Nixon, President Truman, Reverend Clergy, fellow citizens: We observe today not a victory of party but a celebration of

  16. El Camino College

    suppose you buy a ticket for a raffle. the ticket's price is 5$ and the price tis worth 200. If 100 tickets are sold how much money do you expect to win/lose?

  17. Statistics

    A sample of 106 body temperatures resulted in a mean of 98.2 degrees and a standard deviation of .62 degrees. Use these sample statistics to construct a 98% confidence interval estimate of the standard deviation of body temperature of all healthy humans.

  18. Statistics

    The number of books sold over the course of the three-day book fair were: 365, 303, 401. Assume that samples of size 2 are randomly selected with replacement from this population of three values. a. List the different possible samples, and find the mean of

  19. physics

    A ball is projected horizontally from the top of a building 19.6m high.if the line joining the point of projection to the point where it hits the ground makes an angle of 45° to the horizontal what is the initial velocity of the ball

  20. Math

    My thousand digit is an even number which is two more than my hundreds digit. My hundreds digit is three more than my tens digit which is three more than zero, my ones digit. My ten thousands digit is one more than my ones digit. What number am I? my ans

  21. physics

    the length of an aluminum is 76.5cm and that of an iron ruler is 80cm at 0¡ãc. at what temperature will the length of the rules become equal

  22. math

    The area of the scale model of a playground is 6 square yards. The scale model is enlarged by a scale factor of 3 to create the actual playground. What is the area of the actual playground? 18 square yards 54 square yards 108 square yards 324 square yards

  23. Algebra1

    A parabola is defined as f(x)=a(x–8)2+9, where a is a positive real number. As a increases, What happens to the x-coordinate of the parabola’s vertex?

  24. GT

    A GAS EXPANDS IN VOLUME FROM 26.7 ML TO 89.3 ML AT CONSTANTTEMPERATURE. CALCULATE THE WORK DONE (IN JOULES) IF THE GASEXPANDS (A) AGAINST A VACUUM,(B) AGAINST A CONSTANT PRESSUREOF 1.5 ATM, AND (C) AGAINST A CONSTANT PRESSURE OF 2.8 ATM.

  25. Algebra

    f(x) = 4x2; x = 2, x = 2 + h this is telling me to find the average rate of change and the net change? I found one but my answer is disapproved from a friend.

  26. org chem

    Write the cis and trans isomers of 1.) 2-pentene 2.) 3-hexene Please help me idk how. I just know that cis.. Are where atoms are on the same side. While trans on the opposite side

  27. uniben/physics

    the length of an aluminum is 76.5cm and that of an iron ruler is 80cm at 0¡ãc. at what temperature will the length of the rules become equal

  28. Math

    I am a five-digit number. My ten thousand digit is the highest odd number as well as my tens and ones. My thousands and hundreds digits mean nothing. What number i am?

  29. world history

    the toba were a: a. Mongolian nomadic that conquered the northern of China. b. Chinese family that battle Xiongnu NU for control my answer A

  30. world history

    which of these was the focus of mongol unity a. loyalty to khan b. shared descent from one family c. common tribal identity My answer A

  31. math lictracy,life science,geography,tourism,isizulu,english,life orantation.

    please tell me the job i can do while im study that subjects?

  32. world history

    the Liao empire did all of the following exept a. create a chinese style dynasty b. conquer southern china c. adopt chinese writing d. use the civil service system my answer D

  33. math

    I'm trying to do number forms... can someone help me with the question what's the order form least to greatest -2,2.25,-2.75

  34. math

    The area of the scale model of a playground is 6 square yards. The scale model is enlarged by a scale factor of 3 to create the actual playground. What is the area of the actual playground? 18 square yards 54 square yards 108 square yards 324 square yards

  35. math

    The area of the scale model of a playground is 6 square yards. The scale model is enlarged by a scale factor of 3 to create the actual playground. What is the area of the actual playground? 18 square yards 54 square yards 108 square yards 324 square yards

  36. math

    The scale model of a rectangular patio will be enlarged by a scale factor of 2.5 to create the actual patio. The actual patio will be 15 feet by 20 feet. Which is the area of the scale model? 48 square feet 60 square feet 120 square feet 300 square feet

  37. Algebra1

    Consider the point (9,5) which lies on line / in the coordinate plane. Could 9x+5y=0 represent line / ? Yes or No?

  38. social studies

    some parts of spain remained under muslim control for

  39. PHI 103

    In order to determine bias on a website one can

  40. Algebra1

    Consider the point (5,7) which lies on line l in the coordinate plane. Could y=7/5x represent line l?

  41. Algebra

    Explain why an even function does not have an inverse that is a function.

  42. Algebra1

    John is working the function s(x). He found that s(2)=-6 Matthew is working with the function t(x). He found that t(2)=-6 The point (2,-6) lies on the graph of s(x) and t(x). True or False?

  43. Algebra

    Explain how the graph of f(x) = ln x can be used to obtain the graph of g(x) = e^(x-2).

  44. Economics

    Are the any welfare or subsidy payments that should be reviewed?

  45. francais (french)

    Remplissez les tirets avec la bonne forme de "lequel" If my answers are correct 1. Margo revait de sa soeur pour___ il avait de l'admiration 2. Voila une solution_____ je n'ai jamais pense(a) 3. Tout le monde admirait celle fille ______ on citait des

  46. Science

    Final of geography

  47. Chemistry

    9. If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations leading to an answer.

  48. Algebra1

    y=x^2+4x+11 can be written as y=(x+2)^2+7 by completing the square.Written this way one can that the function has a ____. A.) minimum value of 7 B.) minimum value of -2 C.) minimum value of -2 D.) maximum value of 7

  49. Probability and statistics

    The hydrocarbon emissions at idling speed in parts of million (ppm) for automobiles of 1980 and 1990 model years are given for 20 randomly selected cars. 1980 models: 141 359 247 940 882 494 306 210 105 880 200 223 188 940 241 190 300 435 241 380. 1990

  50. Microeconomics

    Suppose that we compare of income earned by different U.S groups by dividing all households into five groups. Which of the following statements about the income distribution in the United States is correct?

  51. algebra 1

    Let x^2-y^2=20 and x-y=2. What is the value of x+y?

  52. Probability/Statistics

    The teacher of a mathematics class has written up the final exam, but wants the questions to be random for each student. There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully

  53. Algebra1

    what are the coordinates of the vertex of the parabola defined by: f(x)=9(x-8)+8 I'm confused on how to solve this. Help pls

  54. Chemistry

    25cm^3 H2SO4 is neutralized by 40 cm^3 of 0.03 mol/dm^3 KOH. What is the molar concentration of H2SO4?

  55. English

    Hi so I read the book The Impossible Rescue by Martin Sandler and I need 3 main ideas and 3 pieces of evidence for each can someone help me I am having a really hard time?

  56. math

    At the rate of $.80 cents per $100, how much does it cost to insure a car against fire and theft for $ 1650

  57. Math

    what is an confidence interval?

  58. Math

    A piece of rectangular cloth has an area of 40 square feet. Its length is 3 feet longer than its width. If the width of the rectangular cloth is represented as x, which of the following represents the length?

  59. Science

    36kg of some material undergoes a process in a piston-cylinder apparatus starting with an initial volume of .057m^3 and pressure of 680kPa. The final volume is twice the initial. Compute the work done by the substance for the following processes: (a)

  60. statistics in math

    what is an confidence interval?

  61. chemistry

    A 8.75-L container holds a mixture of two gases at 23 °C. The partial pressures of gas A and gas B, respectively, are 0.317 atm and 0.755 atm. If 0.100 mol of a third gas is added with no change in volume or temperature, what will the total pressure

  62. Elementary Statistics

    The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.39 inches and a standard deviation of 0.04 inches. If 500 pencils are selected how many would you expect to have a diameter more than 0.33 inches?

  63. Elementary statistics

    Scores on an English test are normally distributed with a mean of 78% and a standard deviation of 4.5%. Find the value of the first quartile.

  64. Statistics

    The Tyco Video Game Corporation finds that it is losing income because of slugs used in its video games. The machines must be adjusted to accept coins only if they fall within set limits. In order to set those limits, the mean wight of quarters in

  65. Statistics

    75 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 10.2 pounds and a standard deviation of 2.9 pounds. What is the 95% confidence interval for the true mean weight of all packages by the parcel

  66. Statistics

    The music industry must adjust to the growing practice of consumers downloading songs instead of buying CDs. It therefore becomes important to estimate the proportion of songs that are currently downloaded. How many randomly selected song purchases must be

  67. Statistics

    A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Cavalier shows that the mean is 4.5 hours and the standard deviation is .6 hours. If 42 mechanics are randomly selected, find the probability that their mean rebuild

  68. Physics

    A 14 g bullet is fired into the bob of a ballistic pendulum of mass 1.6 kg. When the bob is at its maximum height, the strings make an angle of 60° with the vertical. The length of the pendulum is 2.3 m. Find the speed of the bullet. ?m/s

  69. Chemistry

    How many milliliters of .200 M NaOH solutions are needed to react with 40.0 mL of a 0.340 M NiCl2 solution? Equation: NiCl2(aq) + 2NaOH(aq) --> Ni(OH)2(s) +2NaCl(aq)

  70. Statistics

    A survey of 925 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 90% confidence interval for the true proportion of all voters in the state who favor approval.

  71. Nutrition

    Cholesterol: a) can be converted to vitamin D. b) can be found in all foods. c) contains glycerol and 3 fatty acids. d) acts as an emulsifier. I believe it is D

  72. ethics

    Which of the following examples best demonstrates to most people that ethical progress has taken place over the past 200 years? (Points : 1) Laws that prohibit discrimination based on race Laws that have increased speed limits Laws that prevented women

  73. Physics

    A 500 g block slides down a frictionless inclined plane. At the bottom, a vertical circular loop with radius 67 cm is in the block’s path. From what height would the block need to be released to successfully complete the loop without losing contact with

  74. Math - linear programming

    1)An electronic repair shop has 5 vacum cleaners, 12 tv sets, and 18 vcrs to be repaired. The store employs two part time repairmen. One repairman can repair at least one vacum cleaner, three tv sets and three vcrs in 1 week. While the second repairman can

  75. physics

    The driver of a train traveling at 30 m/s applies the brakes when he passes an amber signal. The next signal is 1.5 km/h down the track and it reaches 75 seconds later. Assuming uniform acceleration, find the velocity of the train at the second signal.

  76. dennis matlhaba 2

    i decided to choose this subjec (mathematics literacy,english,sepedi,lo,life sciences,agrictural management practice and afrikaans) so what can i do in my life with all those subject that i studied?