Questions Asked on
August 25, 2012

  1. statistics/ Help!-thanks!

    The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people use the new toothpaste for 6 months. The mean number of cavities at their next check up is 1.5. In the general population

    asked by StudentD
  2. math (statistics)

    the set of integers between 1 and 50 divisible by 8

    asked by Anonymous
  3. accounting

    A company purchased a machine on January 1 of the current year for $750,000. Calculate the annual depreciation expense for each year of the machine's life (estimated at 5 years or 20,000 hours, with a salvage value of $75,000). During the machine's 5-year

    asked by Dan
  4. chem

    what is the symbol for the element that has 78 protons 76 electrons 117 neutrons and a +2 net charge? i thought it was ^195Os^+2 but that is wrong. Thanks for the help!

    asked by sara
  5. Chemistry

    Suppose you have a strong peak at 2230 cm–1. What is the wavelength of the radiation that was absorbed?

    asked by Jen
  6. math

    How many edges are in K15, the complete graph with 15 vertices. Any help would be appreciated, thanks.

    asked by Meredith
  7. physics

    a transformer has 200 turns in its primary coil, the potential difference across the transformer is 220V needs to operate an electrical instrument uses a 110 volts. the number of turns in its secondary coil is: a) 100 turns b) 200 turns c) 110 turns d) 220

    asked by help physics
  8. Physics

    Standing on the top ledge of a 55 m high building you throw a ball straight up with an initial speed of 45 m/s. How long to the nearest second, does it take to hit the ground? I got 10 seconds for the first question. How do I go about answering this one?

    asked by Anonymous
  9. Chemistry

    Balancing Equation Al2C3O3 + H3PO4 --> AlPO4 + CO2 + H2O

    asked by Derp
  10. College Math

    A club consists of 16 men and 19 women. In how many ways can they choose a president, vice president, treasurer, and secretary, along with an advisory committee of six people? (Round the answer to five decimal places.) The Answer is blank x 10 to the 11th

    asked by Jessica
  11. math

    Use Venn diagrams to check the validity of the argument. All bachelors are handsome. Some bachelors do not drink lemonade. Therefore, some handsome men do not drink lemonade. 1 ---Select--- valid not valid All squares are rectangles. All rectangles are

    asked by Anonymous
  12. physics

    Hi, ive been trying to get this problem for a couple of days now but i have no idea of what to do. A very slippery block of ice slides down a smooth ramp tilted at angle pheta. a)The ice is released from rest at vertical height h above the bottom of the

    asked by bobby
  13. algebra

    x 2/3-16x 1/3 +64=0

    asked by Nett
  14. Physiology

    Palpation of the left axillary region demonstrated palpable lymph nodes extending into the ipsilateral anterior thorax. ( Does ipsilateral refer to the axillary ( armpit), meaning the anterior thorax is on the same side as the axillary (left)? ( Must be

    asked by Sarah
  15. math

    write inequality of the form |x-a|

    asked by rolan
  16. science

    when a zinc is placed in a copper(ii)nitrate solution,the strip becomes coated with copper.write down the oxidation half reaction for the reaction that takes place.

    asked by BONNY
  17. Physics

    The relative density of mercury is 13.6. Find the ratio of the mass of mercury of a certain volume to that of water having tem times the volume of mercury

    asked by Prithvi
  18. accounting

    The City of Allentown recently received a donation of two items: A letter written in 1820 valued at $24,000 from James Allen and 1920 painting of the town's city hall, painting by same artist sold recently for $4,000.How do I do a journal capitalizing

    asked by Lynda
  19. Ethics

    THe gm of a software company is in the process of constructing a new facility in a country. THe gm has a manager of native origin acting as liaison between the company and government officials. THe new facility requires some permits and licenses.

    asked by Lori
  20. chemistry

    What hybrid orbitals are used by nitrogen and phosphorous atoms in the following species? (a) NH3, (b) PCl4+, (c) H2N-NH2

    asked by sri harsha
  21. Structured English Immersion

    How can the continuum of strategies be used inappropriately in the classroom?

    asked by Amanda
  22. Physic

    One gallon of paint (3.79 Liters) covers an area of 26.0 m2. What is the thickness (in mm) of the fresh paint on the wall. Please help, I have no idea where to start thank you!

    asked by Kenny
  23. medical

    medical billing DX for head pain possible cyst

    asked by Anonymous
  24. Chemistry IR Spectroscopy

    Sort the compounds: conjugated or non conjugated. -but-2-enoic acid -butanoic acid -hex-4-en-3-one -hexan-3-one

    asked by Jen
  25. math(ODE)

    there are 3 linearly independent solutions of the DE t^3.y"'+3t^2.y"-6ty'+6y=0 of the form t^p, find the possible values of p

    asked by mo
  26. Chem

    Sort the pairs of related compounds by their carbonyl stretching frequencies in cm–1. (There will be three compounds per bin.) Bin # 1: Slightly higher Bin #2: Slightly lower Compounds: -butanol -but-2-enal -heptan-3-one -hept-4-en-3-one -cinnamaldehyde

    asked by Alyssa
  27. Science

    I not sure what formula to use for KE or how to find the mass for the equation. Water is flowing through a 2-inch diameter pipe with a velocity of 3 ft/s. Part A What is the kinetic energy of the water in (ft)(lbf)/(lbm)? (lbf) pound force (lbm) pound mass

    asked by Angel
  28. math

    From a survey of 100 college students, a marketing research company found that 70 students owned iPhones, 45 owned cars, and 40 owned both cars and iPhones. (a) How many students owned either a car or an iPhone (but not both)? 1 students (b) How many

    asked by Anonymous
  29. geometry

    I'm having a hard time with this question: "AB has endpoints A(n,4n) and B(3n,6n). Which of the following is true? A. AB=4n B. The midpoint of AB is (2n,2n). C. AB=n√8 D. The midpoint of AB is (4n,10n)". PLEASE HELP!!!!!

    asked by Rick
  30. Science

    Why is the energy released to break a triple bond not three times the energy to break a single bond?

    asked by Marie
  31. Chemistry

    The total volume of seawater is 1.5 times 10 to the twenty- first power L. Assume that seawater contains 3.1 percent sodium chloride by mass and that it's density is 1.03 g/mL. Calculate the total mass of sodium chloride in kilograms and in tons. ( 1 ton =

    asked by Brooklynn
  32. math

    In a restaurant, a man ordered soup for $3, an appetizer for $4.25 dinner for 17.90,a beverage for $1.50, and dessert for $3.75. He left the server a 15% tip. what was the totl cost of the man's meal, including the tip?

    asked by no name
  33. economics

    what are some mesoeconomics variables/indicators

    asked by nikki
  34. Statistics

    An instructor has graded 25 exam papers submitted by students in a class of 26 students, and the average so far is 71. (The maximum possible score is 100.) A) To raise the class average by 1 point, the score on the last paper has to be:

    asked by Bob
  35. science

    heat energy is measured in unites of

    asked by diane
  36. math

    round 0.8394263 to the nearest hundred-thousndth. Add the fractions 2/3,3/8 and 5/12 reduce to lowest terms subtract the fraction 7 4/ from 18 6/15 reduce answer in lowet terms

    asked by no name
  37. Stor 155

    a data set lists apartments available for students to rent. Information provided includes the monthly rent, whether or not cable is included free of charge, whether or not pets are allowed, the number of bedrooms, and the distance to the campus. Describe

    asked by ami
  38. Dr. Bob please help :)

    Sort the pairs of related compounds by their carbonyl stretching frequencies in cm–1. (There will be three compounds per bin.) Bin # 1: Slightly higher Bin #2: Slightly lower Compounds: -butanol -but-2-enal -heptan-3-one -hept-4-en-3-one -cinnamaldehyde

    asked by Alyssa
  39. geometry

    I"m stuck on this question "Rays PQ and QR ae perpendicular.Point S lies in the interior of angle PQR.If angle PQS!=4+7a and angle SQR=9+4a,find angle PQS and angle SQR. PLEASE HELP!!!!

    asked by Rick
  40. math

    annie,betty,Cathy and Danial are going to stand on a row for taking pictures. How many ways can they stand?

    asked by Em
  41. speech

    I need help with where to look for an answer to this question: That no people can see the same thing because the statement is self-discrediting, if the statement were true the person making the statement would have no way of knowing that it is true since

    asked by Desieree
  42. prinicples of management

    Scenario: Assume you are the owner-driver of a truck, which transports vegetables overnight from the farmers in Florida to the markets in Atlanta. On the way back you haul whatever goods need transporting in the opposite direction. You have five employees

    asked by kim
  43. Info literacy

    Which of the following sets of Dewey Decimal call numbers is in the correct order? A. 010.1 ABR, 004.15 KWA, 100.01 PRO, 100.1 BLU B. 004.15 KWA, 010.1 ABR, 100.01 PRO, 100.1 BLU C. 100.1 BLU, 010.1 ABR, 004.15 KWA, 100.01 PRO D. 100.01 PRO, 100.1 BLU,

    asked by Macy

    Give two examples of each of the following elements of poetry from the poems you have read in Units 4, 5, and 6

    asked by Give two examples of each of the following element
  45. math

    The campus vets club is having a raffle and is selling 2,800 tickets. If the people on your floor of the dorm bought 588 of those tickets, what is the probability that someone on your floor will hold the winning ticket? (Enter your answer as a decimal.) 1

    asked by Anonymous
  46. Please help!! Chemistry

    Ethanol is produced by the action of yeast (catalyst) on sugar cane juice. (1).What is specific name of this reaction? (2.) Write a simple word equation of this reaction.

    asked by Jeconiah
  47. Please help! Chemistry

    In a fume cupboard molten lead(ii) bromide is electrolysed using graphite electrodes. Write half-equations for the reaction at the (i).cathode (ii). Anode (iii). Overall equation (states required).

    asked by Jeconiah
  48. Please help! Chemistry

    In a fume cupboard molten lead(ii) bromide is electrolysed using graphite electrodes. Write half-equations for the reaction at the (i).cathode (ii). Anode (iii). Overall equation (states required).

    asked by Jeconiah
  49. Please help!! Chemistry

    Ethanol is produced by the action of yeast (catalyst) on sugar cane juice. (1).What is specific name of this reaction? (2.) Write a simple word equation of this reaction.

    asked by Jeconiah
  50. Please help. Chemistry

    What is the MAIN reason for storing sodium metal in mineral oils?

    asked by Jeconiah
  51. math

    Determine the comparable interest rate for a $50,000 loan when the quoted information is 11.8% + 0.5 pt + $300. (Round your answer to two decimal places.) 1 % i came up with the answer 8905%

    asked by Anonymous
  52. math (statistics)

    an experiment consistbnof tossing a die and then flipping a coin once if the number on the die is even. If the number on the die is odd, the coin is flipped twice. Using the notation 4H, for example to denote an event that die comes up 4 and then the coin

    asked by Anonymous
  53. math (statistics)

    A costumer has to buy a cell phone from an appliance store with 8 different brands. Each brand is available in 5 different colors, and 7 origins. how many choices can the sales lady offer the costumer?

    asked by Anonymous
  54. Chemistry

    An aqueus solution of sodium mitrate(NaNO3) contains 0.85 grams of sodium nitrate and its concentration is 0.1mol L^-1. What is the volume. in millilitres, of the sodium nitrate solution?

    asked by Jeconiah
  55. Maths

    Solve this using elimination method: 4x-3y=-4

    asked by Jeconiah
  56. math

    STATISTICS The mean score for samantha's first s algebra quizzes was 88. If she scored a 95 on her next quiz, what will her mean score be for all 7 quizzes?

    asked by keisha
  57. geometry

    I need help with this question. "The measure of the supplement of an angle is 60 less than three times the measure of the complement of the angle.find the measure of the angle". Please help!!!!

    asked by Rick
  58. math (statistics)

    how many 4 digit number can be formed from the digits 2,3,5,,6,7,8 if: a.)each digit be only used once b) how many are even? c) how many are odd? d) how many are greater than 25000?

    asked by Anonymous
  59. statistics

    7. (TCO 6) Find P(11 < x < 16) when mu = 15 and sigma = 3. (Points : 3)

    asked by Anonymous
  60. math

    3+2*3 to 4th power*5. my answer is 2025. I was told i was wrong, please help.

    asked by ^^^^kesha
  61. Physics

    a body (A) is moving with a speed of 250m/s in the positive x-direction, collides with body (B) initially at rest and having the same mass as (A). after collision the speed of body (A) is 100m/s making 30 degree with the horizontal. the speed and direction

    asked by Help, Thankyou
  62. physics

    if two waves mix while moving, will one delay the other? a) yes b) no c) sometimes d) only for sound waves

    asked by hanan needs you
  63. physics

    how to find the tension in a rope when we know that the weight of the body attached to the rope is 50 newton? if there is a formula for that can you please tell thankyou

    asked by hanan needs you
  64. math

    let theta be an angle in quadrant three such that tan theta =6/5

    asked by brooke
  65. 12th Grade world history

    With regards to the mining and agriculture industry, in the nineteenth century, which of the following statements is false? A. Large companies tried to be paternalistic to keep workers from rebelling B. Specialization became more common C. Private

    asked by Veronica
  66. visual basic 2010

    Assuming the ocean's level is currently rising at about 1.5 millimeters per year, create an application that displays the number of millimeters that the ocean will have risen each year for the next 10 years.

    asked by alisa
  67. Physics

    can you please help me in telling me the uses of each electromagnet wave? like explain each briefly and what are they used for? thankyou

    asked by wave
  68. College Math

    Find the amount of interest and the monthly payment for the loan. Purchase a living room set for $3,400 at 12% add-on interest for 5 years. (Round your monthly payment to the nearest cent.)

    asked by Jessica
  69. College Math

    Evaluate the expression. (8 7) however the () should cover both numbers. Please explain answer if poss.

    asked by Jessica
  70. Physiology

    The patient reports numbness and tingling in the left lumber area and pain in the contralateral femoral region. ( not sure how to rewrite statement into simpler terms)

    asked by Sarah
  71. statistics

    how many ounces of butt woulld one have used if you use 81% out of countainer of 1.45kg of butter

    asked by Anonymous
  72. Math

    A two population model is satisfied by a system of differential equations given by, V(x,y) = (ax,by)^T The general solution of the system of differential equations has x = áe^at for some constant á. The parameter t can be eliminated and we can express y

    asked by Anonymous
  73. physics

    what are convex lenses?

    asked by help
  74. math

    Determine the down payment and the amount to be financed for each home described below. (a) $360,360; 10% down The down payment is $ 1 The amount to be financed is $ 2 (b) $960,000; 20% down The down payment is $ 3 The amount to be financed is $ 4 Don't

    asked by Anonymous
  75. math

    In a recent survey of 100 women, the following information was gathered. 39 use shampoo A. 42 use shampoo B. 48 use shampoo C. 14 use shampoos A and B. 15 use shampoos A and C. 12 use shampoos B and C. 8 use all three. Use the figure to answer the question

    asked by Anonymous
  76. math

    Determine the comparable interest rate for a $50,000 loan when the quoted information is 11.8% + 0.5 pt + $300. (Round your answer to two decimal places.) 1 % I don't understand how to do this problem

    asked by Anonymous
  77. accounts

    The differences between the book basis and tax basis of the assets and liabilities of Castle Corporation at the end of 2008 are presented below.  It is estimated that the litigation liability will be settled in 2009. The difference in accounts receivable

    asked by accounts
  78. chemistry

    If 0.7825 g of solid Al and 450. mL of 0.2069 M aqueous Cl- are reacted stoichiometrically according to the equation, what mass (g) of solid Al remained? 3 CuCl2(aq) + 2 Al(s) ¨ 3 Cu + 2 AlCl3(aq)

    asked by Ananth
  79. physics

    An object is moving at constant velocity of 20m/s for 10 seconds. Find the acceleration during the 10 seconds interval?

    asked by Veronica
  80. moral science

    chart work for effects of pure and impure water

    asked by shree
  81. math

    find the derivatives, dy/dx for the folowing function : y=ln(cos(0.5)+(sin(x^2+3))^1/3)

    asked by deel
  82. English

    1. I cleaned and ironed my little brother's clothes and sold them all. (Does the sentence mean "I" washed the clothes? Or without washing clothes, did I clean the state of the clothes?) 2. Last Saturday, I sold some of my mom's old dresses. For the whold

    asked by rfvv
  83. math

    16^2-25/5+6(3)4= i having trouble,been on this problem for a while need help and understanding of how the answer 323 when i keep coming up with a lower number. hhelp

    asked by ^^^^kesha
  84. English

    In addition to the Center for Writing Excellence, what other writing tools might you rely on for revising a research paper?

    asked by Devin Matthews
  85. physics

    A tortoise can run with a speed of 11.5 cm/s, and a hare can run 21.4 times as fast. In a race, they both start at the same time, but the hare stops to rest for 126 seconds. The tortoise wins by a shell (18.3 cm). How long does the race take? What is the

    asked by Simone
  86. physics

    On your wedding day your lover gives you a gold ring of mass 3.68 g. 54 years later its mass is 3.28 g. On the average how many atoms were abrated from the ring during each second of your marriage? The atomic mass of gold is 197 u.

    asked by Simone
  87. Math

    Given the formula Xc=1/6.28fC, find C if Xc =500 and f=2000. What are the rules that take me from 500/1 = 1/6.28*2000*C to the next step of: C=1*1/500*6.28*2000 ?

    asked by Tim
  88. math

    complete the square 16x-12y=4y^2+1

    asked by Tim
  89. math

    How do I convert 16ft in .58 sec to mph

    asked by Thomas