Popular questions and responses by brenda
  1. algebra

    how many grams of 2.5% hydrocortisone cream should be mived with 360 g of 0.25 to make a 1% hydrocortisone cream

    asked on June 2, 2013
  2. Math

    Shopping centres X, Y and Z are such that Y is 12km south of X and Z is 15km from X, Z is on a bearing 330 from Y. Calculate the bearing of Z from X.

    asked on June 5, 2020
  3. Chemistry

    NaCl is soluble in water, but I2 is not. Explain

    asked on October 7, 2011
  4. Chemisty

    How do I solve what is the mass of a 32.5 mL sample of ethanol if the density of ethanol is .789 g/mL. I know Mass = Density * Volume. So 32.5 mL * .789g/mL = the mass, but I don't know how to solve that.

    asked on August 26, 2013
  5. Physics

    A boy wishes to row across a river in the shortest possible time. He can row at 2m/s in still water and the river is flowing at 1m/s. At what angle should he point th efront of his boat? The answer is 90 degrees but I don't understand how to solve the

    asked on September 23, 2012
  6. math

    If you diluted 230 ml of 8% benzocaine lotion to 5%, how much could you produce?

    asked on February 1, 2016
  7. science

    which of the following properties of water explains its characterization as the universal solvent. a)kinetic energy of liquid water molecules b)high specific heat c)polarity of water molecules d)high surface tension I chose C

    asked on August 26, 2015
  8. science

    A grasshopper floating in water generates waves at a rate of three per second with a wavelength of two centimeters. (a) What is the period of these waves in seconds? (b) What is the wave velocity in m/s?

    asked on March 22, 2011
  9. Physics

    A 123-cm-long, 5.00 g string oscillates in its n = 2 mode with a frequency of 200 Hz and a maximum amplitude of 4.50 mm. What is the tension in the string?

    asked on July 16, 2010
  10. biology

    which of the following statements are true there are 2 polar covalent bonds in water there are 3 ionic bonds in water there is 1 ionic and 1 covalent bond in water electrons are less attracted to oxygen than hydrogen

    asked on August 28, 2009
  11. statistics

    Chapter 06, Problem 8 A tire manufacturer has been concerned about the number of defective tires found recently. In order to evaluate the true magnitude of the problem, a production manager selected ten random samples of twenty units each for inspection.

    asked on November 12, 2011
  12. science

    When 90 kJ is removed from a 2-kg copper bar its temperature drops from 200 degrees celcius to 85 degrees celcius what is the specific heat of the iron?

    asked on March 22, 2011
  13. english parts of speech

    choose the sentence that has a subject complement a. the nurse felt my pulse b. i felt much better c. the day ended with many surprises d. we can't leave without seeing her

    asked on June 12, 2010
  14. math

    A clothing company has budgeted $58,000 for the purchase of 7 sewing machines. The 7 sewing machines are to be chosen from two models, model X and model Y. If a model X sewing machine costs $8,000 and a model Y sewing machine costs $9,000, how many model X

    asked on May 8, 2016
  15. statostocs

    The Precision Scientific Instrument Company manufactures thermometers that are supposed to give readings of 0°C at the freezing point of water. Tests on a large sample of these thermometers reveal that at the freezing point of water, some give readings

    asked on April 10, 2013
  16. geometry

    T is in the interior of angle"PQR". if angle"PQR"=10X-7, angle"RQT"=5X and angle"PQT"=4x+6 "X" will eaqual to?

    asked on September 11, 2010
  17. Math- probabilities

    A gumball machine contains 6 red gumballs and 6 white gumballs. Two gumballs are purchased, one after the other, without replacement. Find the probability that at least one gumball is white. Express your answer as a decimal, rounded to the nearest

    asked on March 23, 2016
  18. math

    Find the amount of interest on a loan of $10,500, at 9% interest, for 124 days using the exact interest method.

    asked on December 13, 2015
  19. math

    When it is assembled, a flute is 28 inches long. The middle piece m is 5 inches less than twice as long as the first piece f. The last piece l is two-thirds as long as the first piece. Find the length of each piece of the flute

    asked on March 4, 2015
  20. conceptual science

    In the absence of air resistance, a ballplayer tosses a ball straight up. (a) By how much does the speed of the ball decrease each second while it is ascending? (b) By how much does its speed increase each second while it is descending? (c) How does the

    asked on June 23, 2013
  21. Economics

    Would Wells Fargo's market structure be Monopolistic competition?

    asked on October 27, 2012
  22. Chemistry

    In the experiment 0.500 g of copper reacted with oxygen to give 0.563 g of copper oxide. What is the empirical formula of the oxide expressed as a chemical formula?

    asked on October 24, 2012
  23. math

    Given the following information, determine the sample size needed if the standard time estimate is to be within 5 percent of the true mean 99 percent of the time. Work Element Standard Deviation (minutes) Mean Observed Time (minutes) 1 0.20 1.10 2 0.10

    asked on December 3, 2011
  24. statistics

    Tax Preparers Inc. works 250 days per year. The company uses adding machine tape at a rate of eight rolls per day. Usage is believed to be normally distributed with a standard deviation of three rolls during lead time. The cost of ordering the tape is $10

    asked on December 1, 2011
  25. Chemistry

    C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hºf (kJ/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is

    asked on January 12, 2011
  26. Computer programming

    Sorting is a common operation used in programming. Although languages such as Visual Basic 2008 offer built-in methods for sorting, other languages such as C do not support such a method. In order to be a programmer you should be able to implement such

    asked on August 17, 2010
  27. math

    Rewrite the set Q by listing its elements. Make sure to use the appropriate set notation. Q={x|x is an integer and -4

    asked on January 5, 2017
  28. Math

    A Ferris wheel has a diameter of 60 feet. When you start at the bottom of the Ferris wheel, you are 2 feet from the ground.The Ferris wheel completes one rotation in 2 minutes. Create a graph that represents your height relative to the center of the Ferris

    asked on June 3, 2016

    which of the following demographic characteristics distinguishes Europe's population from that of Asia?

    asked on December 30, 2014
  30. chemistry

    what is the percentage of alcohol in a misture containing 1500 mo of witch hazel (14% alcohlol), 2000 ml of glycerin, and 5000 mls of 50% alcohol?

    asked on June 2, 2013
  31. math

    In a scaled drawing 1/3 of an inch represents 6 feet how many inches represent 54 feet

    asked on August 7, 2012
  32. Physics

    A sidewalk is to be constructed around a swimming pool that measures (11.00+/-0.12) m by (17.40+/-0.12) m. If the sidewalk is to measure (1.22+/-0.02) m wide by (9.60+/-0.15) cm thick, what volume of concrete is needed?

    asked on January 18, 2011
  33. Physics

    What wil be the new area of 400cm square of a solid,if its temperature is raised by 10k.(L.E=19times 10raised to power 2

    asked on February 15, 2019
  34. social studies

    how did monopolies hinder the free enterprise system.

    asked on June 13, 2018
  35. math

    Mr. Mitchell deposited $40,000 in a bank and earned simple interest at 7% per anum for two years.calculate the amount he will receive at the end of the two year period

    asked on January 30, 2016
  36. Algebra

    At Phillips college 40% of the students are male. If there are 1200 male students, then how many total students are there?

    asked on October 28, 2015
  37. algebra

    Of 256 consumers polled, 78 people like thrillers and 116 like both thriller and comedies. how many only prefer comedies?

    asked on January 5, 2015
  38. geography

    to accommodate the rapid human population growth, the water supply should increase by- a. 5% for 15 years b. 20% for 15 years c. 50% for 10 years d. 10% each year over next 2 decades

    asked on January 3, 2015
  39. language arts

    What does the phrase as friendly as a nest of yellow jackets mean in paragraph 2?

    asked on October 28, 2014

    How many different strings can be made from the letters in STATISTICS, using all the letters

    asked on September 29, 2014
  41. Statistics

    How do I plug this into the Binomial Probability Formula? prob(lost) = 5/1000 = 1/200 prob(not lost) = 199/200 prob( 2 of 22 are lost) = C(22,2) (1/200)^2 (199/200)^20 = .005224..

    asked on March 9, 2014
  42. Physics

    A 55 kg box is pulled with constant speed across the floor with a rope that is at an angle of 40 degrees above the horizontal. If the tension in the rope is 125n what is the coefficient of friction between the box and the floor?

    asked on February 17, 2014
  43. English

    Which marks of punctuation would be appropriate to set off the italicized words in the following sentence? One day my dad and his brother stop me if you've heard this story started out on what they thought would be an uneventful drive to work.

    asked on December 29, 2013
  44. Pre-Cal

    For given functions f and g find formulas for a)f o g and b)g o f. Simplify results as much as possible. f(t)= t-3/t+6 , g(t)= 1/(x+6)^2

    asked on September 17, 2013
  45. suno

    a 250 g yoyo is swung on the end of a 50cm string at a constant speed of 4/ms. the centrpetal force acting on the yoyo

    asked on September 14, 2013
  46. algebra

    Which point lies on the line defined by the equation 4x+3y=27 A. (-3,5) B. (5,3) C. (3,5) D. (-5,3)

    asked on June 4, 2013
  47. algebar

    A rectangle is 5 times as long as it is wide. If the area is 125 square feet, find its perimeter.

    asked on January 26, 2013
  48. physics

    A large air-filled rubber ball is tethered to the bottom of a swimming pool. The tension in the tether is 100N. The mass of the rubber in the ball itself is 2kg while pwater=1000kgm(-3) and pair=1.2 kgm(-3). What is the volume of the ball?

    asked on September 27, 2012
  49. Healthcare Finance

    Metropolis Health System has received a wellness grant from the charitable arm of an area electronics company. The grant will run for twenty-four months, beginning at the first of the next fiscal year. Two therapists and two registered nurses will each be

    asked on July 18, 2012
  50. dressmaking

    EXAMINATION 04202500 ALTERATIONS AND FITTING I NEED TO CHECK 5 ANSWER, (1) The shoulder seam of the garment with a set-in sleeve is usually located so that it is (A) easily seen in a straight back view, (b) clearly visible in a straight front view.(C)in

    asked on May 22, 2012
  51. business

    Can somebody explain what organizational structure of a company means? I read the definitions, but I still do not understand it.

    asked on January 29, 2012
  52. Statistics

    University Hospital has been concerned with the number of errors found in its billing statements to patients. An audit of 100 bills per week over the past twelve weeks revealed the following number of errors: Week Number of Errors 1 4 2 5 3 6 4 6 5 3 6 2 7

    asked on November 12, 2011
  53. Algebra

    Maria bicycles 8km/h faster than Dennis. In the same time it takes Dennis to bicycle 33km, Maria can bicycle 37km. How fast does each bicyclist travel?

    asked on October 7, 2011
  54. History

    The biography of nelson mandela

    asked on September 11, 2011
  55. Statistics

    Suppose that more than a decade ago high levels of lead in the blood put 81 percent of children at risk. A concerted effort was made to remove lead from the environment. Suppose, according to a survey, only 5 percent of children in the United States are at

    asked on April 17, 2011
  56. science

    A ball is thrown horizontally from a cliff a 8 m/s. How fast is it moving 2 s later?

    asked on February 27, 2011
  57. Chemistry

    C2H2(g) + 2 H2(g)--> C2H6(g) Information about the substances involved in the reaction represented above is summarized in the following tables. Substance/ So (J/mol∙K) /∆Hºf (kJ/mol) C2H2(g) / 200.9 / 226.7 H2(g) / 130.7 / 0 C2H6(g)/ ?? / -84.7 Bond

    asked on January 25, 2011
  58. Chemistry

    C2H2(g) + 2 H2(g)--> C2H6(g) Information about the substances involved in the reaction represented above is summarized in the following tables. Substance/ So (J/mol∙K) /∆Hºf (kJ/mol) C2H2(g) / 200.9 / 226.7 H2(g)/ 130.7 / 0 C2H6(g)/ ?? / -84.7 Bond

    asked on January 15, 2011
  59. chemistry

    C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hºf (kJ/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is

    asked on January 13, 2011
  60. Chemistry

    C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hºf (kJ/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is

    asked on January 11, 2011
  61. Chemistry

    C2H2(g) + 2 H2(g)--> C2H6(g) Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 Calculate the value of the C C (triple bond) energy in C2H2 in kJ/mole.

    asked on January 11, 2011
  62. statistics

    A normal distribution is any distribution that is not unusual. True or false?

    asked on August 19, 2010
  63. Medical Terminology

    A 15-year old female patient has experienced daily nausea for the past two months. The patient states that she feels like "I've eaten something that has upset my stomach.: She denies vomiting and weight loss. The patient has noticed a weight gain of 10 lb

    asked on March 26, 2010
  64. Socials Studies

    1. What would be the modus operandi for john locke 2.John Locke's Major influence(Who did he admire and study) 3. John Locke's political views?

    asked on December 6, 2009
  65. COM140

    Which guidelines do you think are most important for formatting papers? Which guidelines appear less important to the message of a business document but more important to the message of an academic paper? Explain your answers.

    asked on September 2, 2009
  66. biology

    which of the following has a basic ph lemon juice milk of magnesia tomatoes hydrochloric acid

    asked on August 28, 2009
  67. math

    Given f(x) = x2 + 3x – 3, find f(0).

    asked on January 31, 2008
  68. Early Child Ed.

    Would you please check these questions and my answers? 1.Research indicates a child's development of prejudice occurs as an interaction of which: A) cognitive development and positive ideas about particular groups in the child's social environment. B)

    asked on November 1, 2007
  69. Early Child Ed.

    Can you please check these to make sure my answers are correct? 1. An educator who uses stereotype-free learning materials qnd activities that allow both boys and girls to participate in the same physical play is promoting: 1. insensitivity to cultural

    asked on October 31, 2007
  70. Algebra 2

    I am trying to factor a 4th degree polynomial that does not have any rational roots. I need to somehow get it factored into two quadratics. Anyway know of a method to use. 3x^4 - 8x^3 - 5x^2 + 16x - 5

    asked on March 8, 2007
  71. lighthouses

    Hi my son has to do a lighthouse for a school project and it has to really light, I'm not really sure how to go about this project or what materials he will need. Can anyone offer any help Believe it or not here is a site on how to build a model

    asked on January 28, 2007
  72. science

    Why is the sperm of a guy thick? The sperm are not thick. Semen — the chalky to milky white, semi-viscous fluid that is ejaculated — contains sperm plus fluids from the seminal vesicles (almost 1/3 of the volume) and the prostate (about 2/3 of the

    asked on November 21, 2006
  73. Math

    There are six boys and four girls of equal ability trying out for four players school bowling team. How many teams will consist of two boys into girls? How many all boy teams can be formed?

    asked on December 16, 2019
  74. algebra

    The value of a particular investment follows a pattern of exponential growth. In the year 2000, you invested money in a money market account. The value of your investment t years after 2000 is given by the exponential growth model A=7200e^0.045t A) How

    asked on November 24, 2019
  75. Math

    Use the quadratic formula to find the real solutions of the equation 2x^2-3x=1

    asked on November 1, 2018
  76. Math

    Find the ratio of the first number to the second number and simplify?

    asked on June 21, 2017
  77. Pre-Calculus

    If sinx=-1/2 and x terminates in the third quadrant, find the exact value of tan2x.

    asked on June 7, 2017
  78. statistics

    In a study of red/green color blindness, 850 men and 2500 women are randomly selected and tested. Among the men, 81 have red/green color blindness. Among the women, 5 have red/green color blindness. Test the claim that men have a higher rate of red/green

    asked on April 28, 2017
  79. Statistics

    Based on sq foot and home prices :Create an inferential statistics (hypothesis) test using the research question and two variables your learning team developed for the Week 2 Business Research Project Part 1 assignment. Include: The research question Mock

    asked on March 5, 2017
  80. Psychology

    The part of a person's self-conceop that is based on identification with a nation, culture, group or gender is called: A. Social identity B. Social stereotype C. Tacit identity D. Social concept I chose d is this correct

    asked on February 3, 2017
  81. Math

    Centimeter for grid, draw possible rectangles with 16 cm with lengths are whole centimeters po

    asked on January 25, 2017
  82. Algebra 6


    asked on January 16, 2017
  83. Math

    Two guy wires are attached to a cell tower. The first one is 15 ft long and at an angle of elevation on the ground of 55 degrees. The second wire is 22 ft long an angle of elevation on the ground of 63 degrees. Both wires secured same location on ground.

    asked on January 16, 2017
  84. introduction to psychology i

    one advantage of using tests in research rather then laboratory observation is the usefulness of

    asked on December 13, 2016
  85. math

    A punch recipe calls for cups of 1 2/3 orange juice, cup of 3/4 pineapple juice, and cups of 1 1/2 mango juice. How many total cups of fruit juice does the recipe make?

    asked on November 20, 2016
  86. math

    A chord subtends an angle of 68 degrees at the center of a circle of radius 200mm.find the chord length.

    asked on June 21, 2016
  87. English

    Which sentence is appropriate should the word be launch or launching? Since the launching of phishing campaign, a number of staff along with yourself have been identified as clicking on multiple phishing links. Since the launch of phishing campaign, a

    asked on June 17, 2016
  88. math

    The equation y = 55x + 85 describes the amount of money a plumber charges, where y is the total amount he charges and x is the number of hours he works.

    asked on May 22, 2016
  89. Math

    I need help please. Add the opposite of -13 to the reciprocal of 9

    asked on May 12, 2016
  90. math

    a train is 50 miles from Seattle. It is traveling away from Seattle at a speed of 60 mph. In how many hours will the train be 290 miles.

    asked on May 8, 2016
  91. math

    A plane flies from new york to chicago (a distance of 1,600 miles) at 400 mph. Returning from Chicago to New York it flies into a headwind and averages only 320 mph. How many hours total was the plane in the air for the entire trip?

    asked on May 8, 2016
  92. math

    a solution must contain at least 30% orange juice but not more than 20% ginger ale in addition to its other ingredients. If the punch bowl is to hold 400 cups of this solution, what are the amounts of orange juice and ginger ale?

    asked on May 8, 2016
  93. MATH Please Help Please

    Algebra 2 There is a graphs of the sequence f(n)=2n-3 and a graph of the function f(x)=2x-3 What difference exist between the two graphs? What accounts for the differences between the graphs in terms of domain and range? Help please I don't understand

    asked on May 6, 2016
  94. Math

    Algebra 2 A sequence is of pyramids is created where the first pyramid has a height of 6 inches and a base area of 10 inches, for a volume of 20 cubic inches. The height of the next pyramid is twice the height of the previous pyramid. The input of the

    asked on May 5, 2016
  95. English

    In the following sentences underline the word that would be stressed most: a)She dropped her bag. b)It is the white car that i want. c)The girl is mine. d)I prefer to greet Mbotela. e)It is time to go away.

    asked on April 27, 2016
  96. Chemistry


    asked on April 17, 2016
  97. maths

    What is the area of cross sectionof a pool which is 1.5m and 3m

    asked on March 22, 2016
  98. physics

    there are 1000 bricks and when they are stacked neatly they measure 2m by 1m by 1m. What is the volume of the stack? what is the volume of one brick? what is the mass of one brick?

    asked on February 12, 2016
  99. history

    what is the name and year of the treaty that gave french a legal right to hispanoila ?

    asked on February 4, 2016
  100. math

    solve x-6 divided by 3-x-27 divided by 9=3

    asked on January 31, 2016


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