Questions Asked on
October 4, 2007

  1. Statistics

    A manufacturer makes two models of an item: model I, which accounts for 80% of unit sales, and model II, which accounts for 20% of unit sales. Because of defects, the manufacturer has to replace (or exchange) 10% of its model I and 18% of its model II. If

    asked by Sophia
  2. math

    A stereo system is marked down from $450 to $382.50. What is the discount rate?

    asked by haley
  3. physics

    A penny is dropped from the observation deck of the Empire State building (370 m above ground). With what velocity does it strike the ground? Ignore air resistance.

    asked by stephanie
  4. ap chem

    calculate the enthalpy of formationof solid MgOH2, given the following data: 2Mg(s) + O2(g)-> 2MgO(s) heat:-1203.6 Mg OH2(s) -> MgO(s) +H2O(l) heat: 37.1 2H2(g)+ O2(g) -> 2H2O(l) heat: -571.7 what equation would they want the three equations to develop

    asked by lily
  5. Algebra 2

    1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11

    asked by Audrey
  6. algebra

    which of the following pairs of points both lie on the line whose equation is 3x-y=2? a)(2,-2) and (1,5) b)(2,4) and (1,5) c)(2,4) and (3,7) d)(3,7) and (3,-2)

    asked by jessica
  7. Psychology

    What are the strengths and weaknesses of Naturalistic observation, Case studies, and Longitudinal Studies?

    asked by Christian
  8. Ethnics

    What are three characteristics of Orientalism.

    asked by Nora
  9. History

    What are some ways in which soilders in the USA Army communicated during the war with Hitler

    asked by WWII Essay Writer
  10. science

    what happens to the light in a microscope that causes the image to appear inverted

    asked by paula
  11. english

    only when families are more articulate with identifying their needs and when builders and ploicy become more sensitive to human needs will the nation have a variety of good housing desinged,built,and seviced.if this sentnce was rewrote begginging with the

    asked by jessica
  12. Physics

    What force would you have to exert on a 324 N trunk up a 19 degree inclined plane so that it would slide down the plane with a constant velocity? What would be the direction of the force? The coefficient of friction between the plane and the trunk is .322.

    asked by Anonymous
  13. physics

    Glenda drops a coin from ear level down a wishing well. The coin falls a distance of 14.80 m before it strikes the water. If the speed of sound is 343 m/s, how long after Glenda releases the coin will she hear a splash?

    asked by stephanie
  14. Physics

    -The brakes on your automobile are capable of creating acceleration of 19 ft/s2. If you are going 76 mi/hr and suddenly see a state trooper, what is the minimum time required to get your car to 55 mi/hr? For this answer, I got 1.62 s. -How far do you

    asked by Lindsay
  15. hum130

    Religion can affect people in many different ways. List at least two effects that organized religion has had on society and give examples from past and/or present world events that illustrate your examples.

    asked by Milllie
  16. economics

    suppose a firm's constant-returns to scale production function requires it to use capital and labor in a fixed ratio of two workers per machine to produce 10 units and that the rental rates for capital and labor are given by v=1, w=3. a. calculate the

    asked by jon
  17. american history

    how do you translate eglish into modern english

    asked by lemon
  18. english

    what is a widow's walk? I am trying to explain this metaphor's meaning in the book, but I don't understand this term. Can any one help please???? THX A LOT!!!

    asked by ajo
  19. algebra...please help me!

    with the decimal that equals pi....(3.14....) until the 2 hundreth decimal does the cumulative frequency column be used for a project like this one..???? the number is...(pi)

    asked by jennifer
  20. Physics

    Why does the central maximum of a diffraction pattern is twice as long as any other? Thank you

    asked by Mike
  21. Chemistry

    What is the maximum yield of NH3 that can be formed from 8.50 grams of N2 and 1.00 grams of H2 in the (balance) reaction N2 + 3H2---- 2NH3?

    asked by Zarda Daniels
  22. Calculus

    Find the derivative if y=sin^-1(3x)

    asked by Matt Siverio
  23. Calculus

    Find the derivative if y=sec^-1(x+3)

    asked by Matt Siverio
  24. Math

    To travel 175 miles, it takes Sue, riding a moped, 4 hours less time than it takes Doreen to travel 66 miles riding a bicycle. Sue travels 19 miles per hour faster than Doreen. Find the times and rates of both girls.

    asked by leena
  25. Social Studies

    How do I make a word web connecting two of my social studies vocabulary words?

    asked by Sydnee
  26. History For bobpursley

    You said that "line of duty" has a money value to it. Im using the phrase "line of duty" for a WW1 essay. Was there any money value involved then? And would it be the right to use "line of duty" in my essay if there was no money value involved for soliders

    asked by Gina
  27. chemistry

    how do u draw the lewis structure for something like CO -2 over 3. do u add 2 electrons on to the oxygen when yur finding the number of valence electrons cuz that's wat i thought u did but then i got all those questions wrong so wat do u do

    asked by michelle
  28. Physics

    A golf ball released from a height of 1.80 m above a concrete floor, bounces back to a height of 1.06 m. If the ball is in contact with the floor for 4.62 ms, what is the magnitude of the average acceleration a of the ball while it is in contact with the

    asked by Lindsay
  29. History Part II

    Was there really? Because the movies that I say for WW1 were basically untrained men dying by the minute in the war and their bodies were through in ditches or sometimes coffins. With over 15 million people dead in WW1 how would they keep track of

    asked by Gina
  30. math


    asked by tasheona
  31. Math grade 6

    2 ---- 104 3 ---- 158 4 ---- 210 x ----? Write expression

    asked by Deb
  32. Editing

    On this hwk help forum, do you edit people's work? I have a paragraph and I need someone to look it over and make some corrections. Would anyone be willing to do that?

    asked by Gina
  33. math

    use mental math and the distributive property to simplify 25(-99)and 19x21

    asked by danny
  34. math/science

    What is the rate to fall safely? Ex. fall with a parachute from an airplane

    asked by Brianna
  35. Math

    If you have 78 and 104 what is the Least Common Multiples or (LCM)

    asked by Samantha
  36. Chemistry Conversions

    How would you do this problem using fraction bars? The average diameter of a coronary artery is .43 cm. What is the diameter in nanometers?

    asked by Kaylea
  37. sorry it's me but i need help in english.

    Living in the U.S. now for almost nine years has made me adapt to the life and culture here. Despite the fact I still miss my family in India, I’m content with my life in America so far. I look forward to going to school every day, I love living in my

    asked by kelly
  38. history

    my paper says the declaration accused the british king of"acts of pretended legislation." and then my paper says list four such acts of what he did.

    asked by sycalcom
  39. language

    Please help me in figuring out my worksheet that says to follow directions in the order they are given. 1.Write the word solar. 2.Add the 5th letter of the alphabet to the left of each consonant. 3.Add the 5th consonant of the alphabet to the right of the

    asked by nancy
  40. Math for Gina

    Well I need the LCM for 78& 104 ok there

    asked by Samantha
  41. math

    11/12-[1/3 1/4]=

    asked by Carlos
  42. Math

    Joe and Steve went to the store and Joe had seen this jacket that he had wanted.The jacket costed $12.99 and all Joe had was $10.99. Steve said he would give Joe the extra $2dollars and 59 cent that he would have left out of buying his candy.Will Joe have

    asked by Kenya
  43. letters,memo,and email messages

    How would you approach creating a negative message for a superior.

    asked by linda
  44. french question

    how does one say "the test will be difficult?"

    asked by DJ
  45. math


    asked by ariel
  46. per- calculus

    Parrallel to the line 4x+3y=3; containing the points (6,0) a)3x-4y=-24 b)4x+3y=24 c)4x+3y=18 d)3x-4y=18 show all work

    asked by Neshia
  47. science

    Why is it important to maintain core body temperature? and Why is it important to maintain the concentration of water within a mammals internal environment?

    asked by Kell
  48. Math

    The temperature changed from 11 degrees C at noon to -4 degrees C at 8:00 p.m. How many degrees did the temperature drop. Please illustrate answer. Thanks

    asked by VP
  49. MATH


    asked by DREENA
  50. MATH


    asked by KATE
  51. science

    tell what happens to each of the following as depth increases temperature pressure density

    asked by katie
  52. Math ... HELP!!!!!

    What is the Least Common Multiple (LCM) of 78 and 104?

    asked by Samantha
  53. MATH


    asked by KATE
  54. spanish

    how did the europeans transform life in argentina and chile? and why was san martin considered a great liberator?

    asked by jennifer
  55. history

    in the eighteenth century liberals stressed? a)dictatorship b)equal of opportunity c)economic equality

    asked by jessica
  56. science

    list one factor that affects salinity in the ocean temperatures? explain how each factor affects salinity or temperature.

    asked by kitty
  57. mathrmatics

    a basetball team has won 50 games of 75 played.the team still have 45 games to many of the remaining games must the team win in order to win 60% of all the games during the season? a)20 b)22

    asked by jessica
  58. math

    what is the slope of the line p[assing through points a (5,4) and b (0,3)? a)1/10 b)1/2 c)3/2 d)4/5 e)5

    asked by jessica
  59. Economics

    Hi, Could you please help me with the following question? Bob and Jane decide to open their own business selling ergonomically correct office furniture that Jane has designed. Assume they operate this business from leased office space near their home. Also

    asked by Chithra
  60. math

    I am having trouble with this motion problem.A jet travels 1,890 miles in 3 hours. flying against the same wind,the plane makes a return trip in 3 1/2 hours.Find the wind speed and the plane`s airspeed.My book gives the answer,but I just can not understand

    asked by Laci
  61. Science

    How are atoms held together?

    asked by Alex
  62. math(geometry)

    prove Given: line r is parallel to line s prove:

    asked by kim
  63. economics

    in general the role of board of directors is to: a)direct the day to day activities of the film b)represent investor interest in management of the film c)insire that the film operates illegally d)provide staff assistance tothe ceo in stragetic matters

    asked by jessica
  64. math

    Find the center (h,k) and radius r of the circle. x^2 +y^2=4 a) (h,k) = (2,2); r=4 b) (h,k) = (0,0); r=4 c) (h,k) = (2,2); r=2 d) (h,k) = (0,0); r=16

    asked by Neshia
  65. history

    need these letters unscrambled to make a nine letter word relating to native americans R E T A M I L A F The 4 letter is E the 5th letter is R and the 6th letter is I

    asked by Patti
  66. chemistry

    how many moles of x in 33.3g of substance?

    asked by mark
  67. Geometry


    asked by Ashley
  68. math

    1 kilometer= a)1,000centimeters b)1,000,000millimeters c)10 meters D)10,000centemeters e)100meters

    asked by jessica
  69. math

    Find the center (h,k) and radius r of the circle. (x-2)^2 + (y+3)^2 =16 a)(2,-3) r=16 b)(-3,2) r=4 c)(2,-3) r=4 d)(-3,2) r=16

    asked by Neshia
  70. science

    one example of a chemical in food that is not a nutrient is? a)fiber b)selenium c)starch D)FOLATE

    asked by jessica
  71. Algebra

    Is this an example of the transitive property: G+G+G=D G^2=D

    asked by Carly
  72. English

    if anyone's heard of the experience machine, could they please tell me some pros about it?

    asked by Ekridge
  73. MATH

    your high school diploma ffrom american academy landed you a job paying good were wise and saved $150,000 to buy the compmany.the nuts are listed at .01 say you are wise and you are buying 3 millionnuts.the owner give you a

    asked by jessica
  74. spanish

    -how did the europeans transform life in argentina and chile? -what factors (music, literature, food, art, clothing and languages) contribute to create Argentina and Chileam cultures of today? How do they contribute to create it? -Why is San Martin

    asked by lilly
  75. math

    if the taxable income is 3,000..what is the federal income tax according to this chart, if income is over 0 but not over 23,350 the tax is 15percent of the amount over 0 besides the answer can you show me how you got the answer

    asked by laurie
  76. math

    Find the general form of the equation of the circle. Center at the point (-4,-3); containing the point (-3,3) a) x^2+y^2+8x+6y-12=0 b) x^2+y^2+4x-6y+22=0 c) x^2+y^2-4x+6y+22=0 d) x^2+y^2+4x-6y+4=0

    asked by you
  77. economics

    1. DETROIT -- Here's a million-dollar question: How does the global economy connect American car buyers and Russian bureaucrats? One person who can answer is Reg Modlin, an emissions specialist at DaimlerChrysler AG's U.S. unit. Mr. Modlin, like many other

    asked by Chithra
  78. history

    this collection of spells was buried with the mummy

    asked by Anonymous
  79. science

    what is the opposite of a stalactite

    asked by Kylee
  80. physics

    A Nile cruise ship takes 21.7 h to go upstream from Luxor to Aswan, a distance of 208 km, and 19.4 h to make the return trip downstream. Assuming the ship's speed relative to the water is the same in both cases, calculate the speed of the current in the

    asked by stephanie
  81. Health

    We r learning about the reproductive organs and they seem to be confusing me on how they they function together to make an embryo.Can someone explain how they function?

    asked by Bob
  82. grammar

    in the sentence- There are many ways to cook eggs- what is the subject?

    asked by macey
  83. biology

    Discuss how the concept of time applies to ecological situations and evolutionary changes. Do ecological time and evolutionary time ever correspond? If so, what are some examples? i don't get this question at all...please help thanks in advance

    asked by michelle
  84. AP bio

    Explain why adaptations of organisms to interspecific interactions do not necessarily represent coevolution. What would a researcher have to demonstrate about an interaction between two species to make a convincing case for coevolution? i don't understand

    asked by carly
  85. Defination

    What's the word for a person who can think of things before they happen?

    asked by Gina
  86. Physics

    A 40 kg crate is pulled across the ice with a rope. A force of 90 N is applied at an angle of 36 degreees with the horizontal. Neglecting friction, calculate: the acceleration of the crate; the upward force the ice exerts on the crate as it is pulled

    asked by Anonymous
  87. math

    belinda used her calculator to find the decimal for the fraction 21/28. When she entered 21/28, the calculator gave her an answer that looked familiar. Why do you think she recognized it?

    asked by stacey
  88. Physical Science

    Here's a question from my homework that I have no idea where to even beging with it. A European "weighs" 100 kg on Earth. a. What is his mass on Earth? b. What is his weight on Earth? c. What is his mass on the moon where the acceleration due to gravity is

    asked by Beth
  89. math

    a rectangle and triangle have equal areas.the lenght of the rectangle is 12 inches, and its width is 8 inches.if the base of the triangle is 32 inches,what is the length in inches drawn to the base? a)12 b)16 c)6 d)8 e)9

    asked by jessica
  90. Physics

    A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.70 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m.

    asked by Mary
  91. Physics

    Suppose you wish to make a solenoid whose self-inductance is 1.2 mH. The inductor is to have a cross-sectional area of 1.2 10-3 m2 and a length of 0.048 m. How many turns of wire are needed?

    asked by Mary

    I REALLY NEED HELP WITH THIS: -how did the europeans transform life in argentina and chile? -what factors (music, literature, food, art, clothing and languages) contribute to create Argentina and Chileam cultures of today? How do they contribute to create

    asked by LILLY
  93. Defin.

    There is this one thing that you always see in movies when a person puts a cloth on top of a person's mouth and the person is unconsious. What is on the cloth?

    asked by Gina
  94. math

    If h= 3 and k =4, then hk+4/2 -2=

    asked by Carlos
  95. science

    name of stars in caprcornius (seagoat)constellation

    asked by therersa
  96. math

    4 ã4x =

    asked by Carlos

    Is this sentence grammatically correct? I have had my ups and downs, my triumphs and my failures. It isn't a homework problem or anything; I am writing an autobiographical essay and I wasn't sure if this was correct or not... THANK YOU! :]

    asked by Julie
  98. math

    belinda used her calculator to find the decimal for the fraction 21/28.When she entered 21/28, the calculator gave an answer that looked familiar. Why do you think she recognized it?

    asked by kimberly fidhlsgdhlkghs
  99. Sociology

    What exactly is "cultural purity?" I think I understand the concept, but I'm having a hard time putting it into words.

    asked by Lindsay
  100. math

    The ochestra at stripling middle school is responsible for cleaning a 15 mile highway. there are 45 students in the orchestra. If each member cleans and equal section, what decimal represents this section? A.0.3 B.0.33 C.o.3333... D.3.0

    asked by kimberly fidhlsgdhlkghs
  101. Calculus

    (1 - x)^4 * (2x - 1)^5 its a derivative how can i solve this?

    asked by Melissa
  102. Economics

    How can you obtain a downward sloping market demand curve from a horizontal firm demand curve experiencing perfect competition? If you sum up individual demand horizontally for the firm at the given market price will market demad not still be horizontal?

    asked by Samantha
  103. science

    can anyone explain the cycle of malnutrition to me? i know the effects but not reall the cycle

    asked by alley
  104. Chemistry

    Is there an equation for acid rain? What is it?

    asked by Anonymous
  105. math

    suppose a new student starts school today and your teacher asks you to teach her how to find decimal equivalents for fractions. what would tou tell her? how would you convince her that your method works?

    asked by stacey
  106. Chemistry

    Do you know the carbon chain lengths for the different states of alkynes? Eg alkanes having a carbon chain length of 1-4 are gases, 5-16 are liquids and 17+ are solids. Are there similar rules for alkynes?

    asked by Fiona
  107. Literature

    Can the following essay titled "Shooting an Elephant" by George Orwell (1903-1950) be a litterary cannon of today

    asked by student AA
  108. math

    if lauren and max were to measure their fish with decimals, would it be easy to tell which fish is longer?explain why or why not.

    asked by stacey
  109. math

    Squere root of 4x 4 power

    asked by Carlos
  110. Economics- Micro

    You have an option to hire 2 hunters. The first hunter is able to kill two deers in an hour, the other hunter is able to kill one deer in an hour. Do you, without a doubt, hire the first hunter because he has an absolute advantage? My question is that as

    asked by Samantha
  111. Physics

    A golf ball released from a height of 1.80 m above a concrete floor, bounces back to a height of 1.06 m. If the ball is in contact with the floor for 4.62 ms, what is the magnitude of the average acceleration a of the ball while it is in contact with the

    asked by Lindsay
  112. math

    Squere root of 4x 4 power =

    asked by Carlos
  113. anthropology

    what can be an example of global apartheid? like something recent that has been going kinda drawing a blank =[ thanks

    asked by juan
  114. Chemistry

    I really don't understand this question. How do I work it out? Pure acetic acid, HC2H3O2 has the following characteristics: mp = 14.6 degrees C bp = 167.3 degrees C deltaHc = 274 j/g deltaHv = 1621 j/g Cp (s) = 1.72 J/g degrees C Cp (l) = 2.83 J/g degrees

    asked by Eric
  115. AP Chemistry

    I know this is such an easy question, but I completely forgot how to do it. Can someone please help me out? Thanks. If 57.84 g of nickel (Cp = 0.0946 J/g Degrees C) originally at 97.4 degrees C is placed into a calorimeter with 48.24 g of water (Cp = 4.184

    asked by Jesse
  116. CHEM

    How would I go about answer this question? If 72.26 g of hot water at 83.6 degrees C is mixed with 43.86 g of cooler wayer at 38.4 degrees C what will be the final temp of the mixture? The Cp of liquid water is 4.184 J/ g degrees C

    asked by Chung
  117. math

    If n=2 and x=1/2, then n(4-x)=

    asked by Sam
  118. AP chemistry

    If the percent hydration of CuCl2 x XH2O is 13% what is the coefficient of water?

    asked by Em
  119. geometry

    I keep forgetting, but I have a test tomorrow: what is a linear pair?

    asked by [namrot]
  120. math

    what is 83792 in expanded form using 10 powers.

    asked by kiefer
  121. Physics

    Why does the central maximum of a diffraction pattern is twice as long as any other? Thank you

    asked by Mitch
  122. math

    you visit your favorite depatment store and find that your have shirt is on special.the shirt normally cost $60.00 and now has a 20% much will you sabe when you buy this shirt? a)$22.00 b)$32.00 c)$12.00 d)16.00

    asked by jessica
  123. math

    the purse of your dreams is rightin front of have some money and you notice the tag on the purse says $400.the clerk says if you buy cash right now you can take the purse for much money will you p[ay cash? a)$49.00 b)$48.00 c)$52.00

    asked by jessica
  124. Calculus

    Find the derivative if y^3 + y = 2cosx

    asked by Matt
  125. Calculus

    Find an equation for the tangent and normal to the curve x^2 + y^2 = 9 at x=1

    asked by Matt
  126. Calculus

    Find the derivative if x^3 + 4xy^2 - y^4 = 7

    asked by Matt
  127. Comman Sense

    There is this one term phrase when a solider dies while serving the counrty. Its something like. " in the line of duty." Im not quite sure what it is. Would you tell me the phrase.

    asked by P
  128. History

    Whats the word that means that someone is forced to participate in war.

    asked by Gina