sha

Most popular questions and responses by sha
  1. math

    how many diferrent 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS? the ans. must be 90,720

    asked on July 18, 2010
  2. math

    if E and F are independent events, find P(F) if P(E)=0.2 and P(E U F)= 0.3

    asked on July 27, 2010
  3. statistics

    An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings. The 100 filings showed an average preparation time of 90 minutes with a standard deviation of 140

    asked on November 19, 2011
  4. math..urgent pleasehelp :(

    the purchasing power (in dollars) of an annual amount of A dollars after t years of 5% inflation decays according to P= Ae^-0.05t a) how long will it be before a pension of $60,000 per year has a purchasing power of $30,000 b) how much pension A would be

    asked on March 3, 2011
  5. chemistry

    what is thbe total number of molecules of so2 in a 0.10 mole same of so2

    asked on January 23, 2011
  6. Science

    What is the IUPAC name FOR CH3COOC2H5

    asked on August 1, 2018
  7. physics

    a ball dropped from rest at a height of 50 m above the ground. (a) what is the speed just before it hits the ground? (b) how long does it take to reach the ground?

    asked on March 10, 2015
  8. eng.

    Which of these statements is true? a) Sensory details distract readers; therefore, writers should avoid using them. b) Sensory details show readers that the writer is a sensitive person. c) Sensory words make writing come alive because we understand the

    asked on June 26, 2010
  9. Physics

    Richard is driving home to visit his parents. 130 mi of the trip are on the interstate highway where the speed limit is 65 mph . Normally Richard drives at the speed limit, but today he is running late and decides to take his chances by driving at 80 mph .

    asked on October 14, 2017
  10. finitemath

    a store sells cashews for $5.00 per pound and peanuts for $1.50 per pound. the manager decides to mix 30 pounds of peanuts with some cashews and sell the mixture for $3.00 per pound. how many pounds of cashews should be mixed with the peanuts so that the

    asked on June 23, 2010
  11. Chemistry

    The standard free energy change, delta f G, for the formation of NO (g) from its elements is +86.58 kJ/mol at 25 degrees C. Calculate Kp at this temperature for the equilibrium 1/2 N2(g) + 1/2 O2(g) = NO(g) Comment on the sign of delta G and the magnitude

    asked on April 30, 2014
  12. math problem

    In a raffle 1000 tickets are being sold at $1.00 each. the first prize is $100, and there are 3 second prizes of $50 each. by how much does the price of a ticket exceed its expected value?

    asked on July 27, 2010
  13. Chemistry

    Balance the redox equation. It occurs in acid solution. Sn(s) + H+(aq) = Sn2+(aq) + H2(g) I understand that first the equation needs to be put into halves. Sn(s) = Sn2+(aq) and H+(aq) = H2(g) Then, Sn(s) = Sn2+(aq) + 2e- and ? From here I am lost. Please

    asked on April 30, 2014
  14. probability. review questions

    1)what is the probability that a seven-digit phone number has one or more repeated digits? 2) five letters, with repetition allowed, are selected from the alphabet. what is the probability that none is repeated?

    asked on July 28, 2010
  15. math

    felix has 2 yards of ribbin. He needs 1/4 yard to make 1 bow. how many bows can felix make?

    asked on December 11, 2013
  16. math

    LOGIC: I plus onehalf of square plus zero plus onehalf of diamond plus center of the sea plus threefourth of X plus zero plus center of the sun?

    asked on March 27, 2012
  17. chemistry

    What is the molar mass of an acid if 0.422 g of the acid are neutralized by 17.5 mL of 0.268 M NaOH?

    asked on November 23, 2017
  18. probability

    how many different 10-letter words (real or imaginary) can be formed from the letters in the word MONOCHROME?

    asked on July 27, 2010
  19. math

    after twelve monthly deposits of $400 at 12% compounded monthly, find the amount of an annuity. please help me:(

    asked on July 13, 2010
  20. business mathematics

    calculate the exact and ordinary number of days a) from 12 February 2012 to 26 August 2012

    asked on November 8, 2018
  21. MS office Acess 2007

    Determining Table Fields Which should not be included as fields in a table? Choose all that apply. A - Small fields B - Region fields C - Yes/No fields D - Calculated data E - Numbered fields F - Separate name fields

    asked on October 25, 2010
  22. acct.

    how will I journalize this transaction? Rented a backhoe to Mission Landscaping at a price of $250 per day, to be paid when the backhoe is returned. Mission Landscaping expects to keep the backhoe for about two or three weeks

    asked on September 26, 2010
  23. math

    Thomas in 4 hours. Julia can do the same job in 6 hours. How many hours will it take the two of them to do the job if they work together?

    asked on November 10, 2008
  24. math

    how many different 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS?

    asked on July 16, 2010
  25. Algebra II

    An office building containing 96,000 square ft of spaceis to be made into apartments.There at most 15 one bedroom units,each with 800 square ft of space. The remaining units each with 1200 square ft of space,will have two bedrooms. Rent for each one

    asked on November 10, 2008
  26. Physics

    When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.6 m/s in 0.11 s .

    asked on October 15, 2017
  27. financial acct

    how will I journalize this transaction? Rented a backhoe to Mission Landscaping at a price of $250 per day, to be paid when the backhoe is returned. Mission Landscaping expects to keep the backhoe for about two or three weeks

    asked on September 27, 2010
  28. probability

    you are to set up a code of consisting of three letters (A to Z) and five numbers (0 to 9). a) how many codes are possible if the letters and numbers can be repeated? b) how many codes are possible if each letter and digit can be only used once? c) how

    asked on July 27, 2010
  29. math problem

    two cards are drawn at random (without replacement) from a regular deck of 52 cards a) what is the probability that the first card is a heart and the second is red? b) what is the probability that the first card is red and the second is a heart?

    asked on July 27, 2010
  30. math.please help!

    minimize z= 5x + 9y subject to 6x + y >= 18 2x + 3y >= 30 x= 0 find the corner points, ans subject the objective function to the corner points, finding the minimum value of z giving the constraints. i know the first and second points but i couldn't figure

    asked on July 19, 2010
  31. Chemistry

    The following reaction is reactant-favored at equilibrium at room temperature. COCl2(g) = CO(g) + Cl2(g) Will raising or lowering the temperature make it product-favored?

    asked on April 30, 2014
  32. Chemistry

    Which substance has the higher entropy? a.) a sample of pure silicon (to be used in a computer chip)or a piece of silicon containing a trace of another element such as boron or phosphorus b.) O2(g) at 0 degrees C or O2(g) at -50 degrees C c.) I2(s) or

    asked on April 30, 2014
  33. math prob.

    the purchasing director of a bank has just received a shipment of 100 printers. She has been told that the shipment includes 5 defective printers. She randomly selects two printers and tests them. If both printers work the purchasing director accepts the

    asked on July 25, 2010
  34. stats:find the mean

    please help! i know exactly how to find the mean but i am having a problem finding the midpoints. couldn't get them right :( salary employees 5,001- 10,000 == 16 10,001-15,000 == 15 15001-20,000 == 11 20,001-25,000 == 15 25,001-30,000 == 23

    asked on May 15, 2010
  35. Math

    evaluate: (log5 20^4)(log20 5^4) I don't get it

    asked on November 13, 2008
  36. math

    Good 1 Steve so I sux at math but your here :) Heres another: X = [students playing football], Y = [students playing baseball], and Z = [students playing rugby]. Draw a Venn diagram of Z – (X U Y), and write a sentence describing what the set represents:

    asked on April 13, 2014
  37. Chemistry

    Balance The Following Equations. _SnO2+_Ba(OH)2->_Sn(OH)4+_BaO _Al(OH)3+_(HG2)3_Po4)2->_AlPO4+_HG2(OH)

    asked on January 4, 2011
  38. Chemistry

    Balance the Following Equations. _MgSo3+_HNO3->_Mg(NO3)2+_H2SO3

    asked on January 4, 2011
  39. math

    Assume that the student has a cup with 14 writing implements: 7 pencils, 5 ball point pens, and 2 felt-tip pens. How many such subcommittees are possible if each subcommittee must contain at least 1 and no more than 2 Republicans?

    asked on September 16, 2010
  40. math prob.

    Through a mix-up on the production line, 6 defective refrigerators were shipped out with 44 good ones. if 5 are selected at random, what is the probability that at least 2 of them are defective? ty in advance!!

    asked on July 25, 2010
  41. Algebra II

    find the area of triangle ABC if A=56 degrees, b=20 ft, and c=12 ft. Round to the nearest tenth.

    asked on March 14, 2009
  42. Add maths

    one of the roots of the equation x^2 - 2qx + 2q +4 = 0 is three times the other root, determine the value q

    asked on January 23, 2015
  43. science

    a scientist has two samples of a substance. both samples have the same temperature. one sample has a mass of 10 g. the other sample has a mass of 20 g. compare the average kinetic energy and total kinetic energy of the particles in each sample.

    asked on September 26, 2011
  44. Phar Science

    In a sedimentation experiment using a centrifuge rotating at 20,000 rpm at 25°C the position of the boundary between the settled phase and the supernatant for a protein was found to be at 6.153 cm at t = 300 s, 6.179 at 600 s, and 6.206 at 900 s. If D for

    asked on April 5, 2011
  45. Phar Science

    The following data were obtained for solutions of carboxymethylcellulose flowing through a capillary viscometer. Concentration (g/L) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.8 Time (s) 64.2 68.4 72.7 77.1 81.5 86.1 91.0 100.5 The Mark-Houwink-Sakurada parameters for

    asked on April 5, 2011
  46. math

    the perimeter of a rectangular floor mat is 42 inches, if the width is 9 inches, what is the length?

    asked on January 24, 2011
  47. English help

    it is second paragraph. I want to tell you English is my second language.I try my best to do it in right way . After the death of Enkidu .He asks him self does this mean I have to die too? This thinking changes his direction. It is not doubt to say that

    asked on August 19, 2010
  48. math.please help!

    set up the linear programming problem. Do not solve. A brewery manufactures three types of beer-lite, regular and dark. Each vat of lite beer requires 6 bags of barley, 1 bag of sugar, and 1 bag of hops. Each vat of regular bear requires 4 bags of barley,

    asked on July 19, 2010
  49. math..help?

    from 1500 lottery tickets that are sold,3 tickets are to be selected for first, second, and third prizes. how many possible outcomes are there?

    asked on July 19, 2010
  50. Math

    graph the function: y = 4 sin 2 theta

    asked on March 14, 2009
  51. Algebra II/ Trig

    Should the triangle be solved beginning with Laws of Sines or Laws of Cosines. Then solve the triangle and round to the nearest tenth. a=16, b=13, c=10 I got this answer but it is wrong and don't understand where I made the mistake. a=16, b=13, c=10

    asked on March 14, 2009
  52. Alge2/trig

    Should the triangle be solved beginning with Laws of Sines or Laws of Cosines. Then solve the triangle and round to the nearest tenth. a=16, b=13, c=10

    asked on March 14, 2009
  53. math

    determine whether y=1.5(1/6)^x represents exponential growth or decay

    asked on November 13, 2008
  54. Algebra

    use synthetic division to find (2x^3 -5x^2 +7x-1) divided (x-1)

    asked on November 10, 2008
  55. physics

    a car moving at 30 m/s slows to a speed of 10 m/s in a time of 5 s. determine a.) the acceleration of the car (b). the distance it moves in the third second.

    asked on March 10, 2015
  56. algebra

    seven more than twice a certain number?

    asked on October 2, 2014
  57. math

    If a plant has a linear growth rate and 1 day after planting is 2x+4 and day four is 4x+8 Wgat is the growth rate?

    asked on May 21, 2014
  58. math

    Steve earned scores of 96 and 87 on his first two exams. What will his average grade be if he gets a 72 on his third exam?

    asked on April 27, 2014
  59. painting

    compare and contrast the representation of weight and space in the painting of The Good Shepherd in the Catacomb of Saints Pietro and Marcellino (Image 15-2) and the mosaic of Justinian and Attendants in Ravenna's Church of San Vitale (Image 15-5)

    asked on May 31, 2012
  60. physics

    2 masses are connected through a non-stretchable string that passes over a frictionless pulley. The masses of the objects are 12 kg and 5.5 kg respectively. The obj with larger mass is hanging 2.5 m fr the surface of a table. Suppose that the two objs are

    asked on January 15, 2012
  61. Phar Science

    In a sedimentation experiment using a centrifuge rotating at 20,000 rpm at 25°C the position of the boundary between the settled phase and the supernatant for a protein was found to be at 6.153 cm at t = 300 s, 6.179 at 600 s, and 6.206 at 900 s. If D for

    asked on April 5, 2011
  62. writing

    use the word girls in a sentence

    asked on December 6, 2010
  63. acct

    which account will not appear on an after -closing trial balance?

    asked on September 22, 2010
  64. math

    A sample of 8 persons is selected for a test from a group containing 40 smokers and 15 nonsmokers. in how many ways can the 8 persons be selected?

    asked on July 18, 2010
  65. math. help please!!

    Using only the digits 0 an 1, how many different numbers consisting of 8 digits can be formed?

    asked on July 14, 2010
  66. eng

    can anyone check my grammar please? The main problems Arnold Schwarzenegger must focus on are the immigration issues, college tuition costs and high unemployment.

    asked on June 27, 2010
  67. english

    what comes next after the topic sentence?

    asked on June 25, 2010
  68. concrete

    can anyone define and give me examples of "concrete details" please?

    asked on June 25, 2010
  69. fintemath

    dimension of a floor; the perimeter of a rectangular floor is 90ft. find the dimensions of the floor if the length is twice the width

    asked on June 23, 2010
  70. Math

    I checked the problem but I didn't understand the answer how could you do?, because what happened with the fractions? Estimate the result of the following problem as a whole number: 4 1/43+2 15/16 -1 24/26+ 5 11/12 -3 3/61 Can you explain me, please....?

    asked on January 20, 2010
  71. science

    Which is an invertebrate? a-eagle b-fish c-snake d-shrimp

    asked on January 12, 2009
  72. science

    why don't soft animals like sponges cnidarians live on land?

    asked on January 12, 2009
  73. trig

    Which expression is equivalent to tan theta - sec theta/sin theta? A)-cot theta B)cot theta C)tan theta-cot theta D)tan theta-sec^2theta

    asked on November 15, 2008
  74. science

    what is an example of a chemical reaction.

    asked on March 4, 2008
  75. math

    what is the equation of a line parallel to the given line and passing though the given point y=x+4 ;(-7, 1)

    asked on October 6, 2017
  76. math

    ab and ac are tangents to a circle with centre o. if angle bac is equal to 40 degree, find angle abc and angle acb.

    asked on December 25, 2016
  77. Add maths form 4

    The quadratic equation 2qx(x+1)-8x^2-1, where q is a constant, has no real roots. Find the range of values of q. Answer given is -2

    asked on January 31, 2015
  78. Add maths form 4

    Given that the quadratic equation hx^2 - 4kx + 9h =0 has two equal roots, find the ratio h:k The answer given is 4:6. I need to know the method pls... Thx in advance

    asked on January 26, 2015
  79. math

    Find the intersect point for the two equations: x = 2; y = -3

    asked on April 13, 2014
  80. human body

    a friend has been taking over-the-counter vitamins and minerals because he heard that some of them can boost energy levels and immune system function. he begins experiencing fever, nausea, and recurrent kidney stones. based on these symptoms, what might

    asked on March 30, 2013
  81. Math

    Provide an example of at least five ordered pairs that do not model a function. The domain will be any five integers between 0 and 20. The range will be any five integers between -10 and 10. Why does your example not model a function?

    asked on November 10, 2011
  82. chem

    how many mL of a .094 M NaOh are needed to neutralize 21.4 mL of .160 M HCL

    asked on June 13, 2011
  83. Phar Science

    A researcher in Urumqi drops a rhodium ball of diameter 4.20 mm through a dilute aqueous solution of a high molar mass natural gum contained within a glass tube which has four graduations marked 10 cm apart. It is 18 C in the laboratory and the ball takes

    asked on April 5, 2011
  84. math

    Page 9 of 9 What is the probability that a point chosen at random on segment PQ will be between -1 and 3? -5 through 5

    asked on April 1, 2011
  85. Public Finance

    Your state has a retail sales tax of 10 percent but it exempts food, prescription drugs, and all services including housing services, repair services, and consumption of electricity and other public utility services. Use supply-and-demand analysis to

    asked on February 7, 2011
  86. Public Finance

    Explain why using the local property tax to finance a given quantity and quality of public schooling can result in low tax rates in rich jurisdictions but high tax rates in poor jurisdictions. How do state governments supplement local finance of education

    asked on February 7, 2011
  87. Philsophy

    How the majority can have intransitive preferences without anyone's preferences being intransitive?

    asked on October 13, 2010
  88. Ethics

    How there can be an ethics which does not focus on right action? can anyone help me figure out what this question means and/or how to answer it? thanks in advance!

    asked on September 16, 2010
  89. research paper

    Is fast food a good topic for research paper?

    asked on July 22, 2010
  90. math

    the withdrawal is to be $500 per month for 36 months at 10% compounded monthly, find the present value of annuity.

    asked on July 13, 2010
  91. math

    how will you solve these equations using matrices x+y=1 and 3x-2y=4/3

    asked on June 27, 2010
  92. Math

    Estimate the result of the following problem as a whole number: 4 1/43+2 15/16 -1 24/26+ 5 11/12 -3 3/61 Thank you for helping me.

    asked on January 19, 2010
  93. child development

    discuss three different ways a teacher can foster syntactic or semantic development in students. Provide a classroom example of each

    asked on February 26, 2009
  94. 7th grade

    Who is Ra the king of the gods?

    asked on November 18, 2008
  95. trig

    Which expression is equivalent to tan theta-sec theta/sin theta? I don't get this

    asked on November 15, 2008
  96. math

    evaluate: [12 5 -2] [-3 0 1] [-5 4 2] what does it mean to evaluate a matrice

    asked on November 13, 2008
  97. math

    Triangle DEF with vertices D(2,5), E(1,-6), and F(-5,3) is translated 3 units right and 2 units down. Find the coordiantes of DEF.

    asked on November 13, 2008
  98. Algebra II

    write an equation for the line that passes through (0,7) and is perpendicular to the line whose equation is y=1/2x-1

    asked on November 10, 2008
  99. science

    what might be some clues that would help us know whether or not the change is chemical.

    asked on March 4, 2008
  100. Science

    what might be some clues that would help us know whether or not the change is chemical? PLEASE help me i am confused.

    asked on March 4, 2008

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