Questions Asked on
July 25, 2011

  1. General Chemistry

    So I've been working on this online homework problem and got it wrong 8 times. I need help. Here's the question: 1,2-diaminoethane, H2N-CH2-CH2-NH2, is used extensively in the synthesis of compounds containing transition-metal complexes in water. If pK_b1

    asked by Dre
  2. math

    a catering company has 15 customers orders during its first month. for each month afterward the company has double the number of orders of the previous month. how many orders in total did the company fill in its first year?

    asked by kennisha
  3. Math

    From the top of a 50m high bridge, two boats are seen at anchor. One boat is S 50degrees W and has an angle of depression of 38 degrees. The other boat is S 60degrees E and has a 35 degree angle of depression. How far apart are the boats?

    asked by Kalia
  4. math

    the maximun height of a ferris wheel is 35m. the wheel takes 2 mins to make one revolution. passengers board the ferris wheel 2m above the ground at the bottom of the rotation. a. write an equation to model this b. how high is the passengers after 45s c.

    asked by kristen
  5. physics

    if the brakes of an automobile are applied from 70km/h to 35km/h, how many meters does the car travel during this deceleration?

    asked by ruel
  6. early childhood

    Whats two resources designed to assist teachers in constructively dealing with childrens challenging behaviors like biting, hitting, aggressive,etc?

    asked by mariah
  7. Math

    Paul drove from his house to work at an average speed of 40 miles per hour. The drive took him 15 minutes. If the drive home took him 20 minutes and he used the same route in reverse, what was his average speed going home?

    asked by Lilia
  8. Biology

    Write true or false: 1. A root hair is a small extension of an epidermal or outermost cell layer of a dicot root 2. Layers of parenchyma cells make up the cortex of a dicot root and the central pith of a monocot root. 3. Outside the endodermis is a tissue

    asked by Nandini
  9. english.

    Can you give me some examples of figurative language in the book Dairy Queen by Catherine Murdock. And also can you list the page numbers.

    asked by Jenna.
  10. math

    A cardboard box manufacturer wishes to make open boxes from rectangular pieces of cardboard with dimensions 40 cm by 60 cm by cutting equal squares from the four corners and turning up the sides. Find the length of the side of the cut-out square so that

    asked by Jeffrey
  11. chemistry

    If one-fourth cup of vinegar contains 0.049 mole of HC2H3O2, how many grams of baking soda will react with this amount of acetic acid? What would be the percent by weight of HC2H3O2 in this one-fourth cup of vinegar solution? (assume density of vinegar is

    asked by michael smith
  12. Finance

    Nancy Bellow promised her son she would pay him $600 a quarterly for four years.If Nancy can invest her money in a 6% ordinary annuity, how much would she need to invest today

    asked by Dell
  13. logic

    Aron: The two double A batteries in my CD player are dead, so the CD player doesn’t work. My television remote control, which also uses two double A batteries, works fine. So if I move the two batteries from my television remote control to my CD player,

    asked by Anonymous
  14. calculus

    this is a optimization problem A construction company has been offered a contract for $7.8 million to construct and operate a trucking route for five years to transport ore from a mine site to a smelter. The smelter is located on a major highway, and the

    asked by robert
  15. math

    A balloon rises at a rate of 3 meters per second from a point on the ground 30 meters from an observer. Find the rate of change of the angle of elevation (in radians per second or rad/sec) of the balloon from the observer when the balloon is 30 meters

    asked by Jeffrey
  16. Math

    Trigonometry Problem: The good ship Bravery is 30 km due west of the good ship Courageous. The Bravery sets out on a bearing of 030° at a speed of 20km/hr. The Courageous sets out on a bearing of 345° at a speed of 25km/hr. Will the ships collide?

    asked by Kalia
  17. algebra

    85 factoral to the nearest tenth

    asked by skip
  18. statistics

    The average marks of 30 students in mathematics is 69. If the class leader’s mark is included then the average becomes 70. Find the class leader’s mark.

    asked by Sharon
  19. math

    Write MCMLXXVII in Hindu-Arabic?

    asked by Erica Anne C. Arellano
  20. economics

    1. Pick a business that you are familiar with and list three (3) fixed and (3) variable inputs associated with that business. 2. What are some things that you think that business could do to reduce their costs? Why?

    asked by Rachael
  21. English

    Can you please check these sentences on phrasal verbs? Thank you in advance. 1) Can I have two chops of lamb (or lamb chops?) and a roast chicken (or a chicken roast?)? 2)Our teacher will go over our mistakes during our afternoon’s revision course.

    asked by Henry2
  22. college algebra

    how long would it take $3,100 to grow to $8,800 if the annual rate is 3.5% and interest is compounded monthly? please help

    asked by Ash
  23. Basic Statistics

    A population of 200 voters contains 52 Republicans, 128 Democrats, and 20 independents and members of other parties. A simple random sample of 20 voters will be drawn from this population. The expected number of Republicans in the sample is ______ ? The

    asked by mike
  24. science

    Question: If you have an electric motor on a bench and hook it to the power the shaft turns. If you put the shaft in a vise the casing of the motor will turn. Now:...put this motor in free space no gravity and attach a battery for power..when the power is

    asked by Tiffany
  25. Math

    The difference between two positive number is 72 and one of them is divided by the other, the quotient is 4.Find those numbers. Option: a) 22&94 b) 24&96 c) 20&92 d) 30&102

    asked by Jay
  26. Algrebra

    Please advise on the following: From 1993 to 2003 the cumulative number N of AIDS cases in thousands can be approximated by, where corresponds to the year 1993. N = -2 x2 + 76x + 430, where x = 0 corresponds to. 1) Show how well the equation approximates

    asked by Raj
  27. physics

    A projectile is fired with velocity v at angle thita. Find the time when velocity of projectile will make angle 90' with initial direction of velocity?

    asked by Shivam
  28. bio

    Find a media piece—article, video, presentation, song, or other—related to the scientific method, creating hypotheses, or designing experiments. Include the link or reference citation for the piece and describe how it helped you better understand how

    asked by Anonymous
  29. college algebra

    find all vertical and horizontal asymptoles f(x)=4x/x^+1

    asked by Ash
  30. math

    A right circular cylinder is to be designed to hold 750 cm3 of processed milk, and to use a minimal amount of material in its construction. Find the dimensions for the container.

    asked by Jeffrey
  31. math

    Upon examining the contents of 38 backpacks, it was found that 23 contained a black pen, 27 contained a blue pen, and 21 contained a pencil, 15 contained both a black pen and a blue pen, 12 contained both a black pen and a pencil, 18 contained both a blue

    asked by tamika
  32. physics

    Consider two current carrying wires shown below. The current in the wire 1 is 4.5 A in the positive x direction. Find the magnitude and direction of the current in wire 2 if the net magnetic field at point A is to be 7.5 μT in the positive z direction

    asked by Chloe
  33. Geometry

    Given: A(3,-1), B(5,2), C(-2,0), P(-3,4), Q(-5,-3), R(-6,2). Prove: angles ABC and RPQ are congruent by completing the paragraph proof. AB=RP=13, BC=(?)=53, and CA=QR=26. So segment AB is congruent to (?), segments BC and PQ are congruent and segment CA is

    asked by Wendell
  34. Chem

    How much heat is liberated at constant pressure if .928 g of Fe reacts with 26.2 mL of .238 M HCl? Delta H = -87.9 kJ

    asked by Anonymous
  35. physics

    suppose you stand on a bathroom scale and get a reading of 700N. in principle, would the scale read more, less, or the same if the earth did not rotate?

    asked by Anonymous
  36. physics

    A projectile is fired with velocity v at angle thita. Find the time when velocity of projectile will make angle 90' with initial direction of velocity?

    asked by Shivam
  37. algebra

    factor the expression a^2-6ab+9b^2 into a product of binomials

    asked by ROCKY
  38. Algebra

    Andrew factored the expression 28x^3-42x^2+35x as 7x(4x^2+6x-5). But when Melissa applied the distributive law and multiplied out 7x(4x^2+6x-5) , she got 28x^3+42x^2-35x ; thus, Andrew’s solution does not appear to check. Why is that? Please help Andrew

    asked by Natalie
  39. Pr-Cal/Trig

    1)if the graph of f(x)=cotx is transformed by a horizontal shrink of 1/4 and a horizontal shift left pi, the result is the graph of: a) g(x)= cot[1/4(x-pi)] b) g(x)=cot[1/4(x+pi)] c) g(x)=cot[4(x-pi)] d) g(x)=cot[4(x+pi)] e) g(x)=cot[4x+pi] please include

    asked by Ashley
  40. Math

    what does it mean to describe the end behavior of f in a graph?

    asked by Ashley
  41. math

    the leaning tower of pisa is 55.9m tall and leans 5.5 deg from the vertical. if its shadow is 90.0m long, what is the distance from the top pf the tower to the edge of the shadow? assume that the ground is level. please help in details

    asked by amy
  42. algebra

    solve. 0.7x+4

    asked by Tony
  43. math

    solve by the elimination method: 9x-9y=18 7y-3x=-8 please solve step by step thank you for your help

    asked by Richard
  44. English

    Please let me know if this is correct? Broad Subject-Phonebook Character Limited Topic for Thesis Statement- Oliver Tolivr Main Idea- Wealthy Buisness Man Three Step Format #2 Appearance-Sloppily dressed #3 Surroundings-State of the art mansion #4

    asked by lizzie
  45. Organic Chemistry

    Draw and describe the three overall redox reactions than occur in the conversion of 2,6-dimethylnitrobenzene to 2,6-dimethylaniline using stannous chloride. (Not the mechanisms). What are the key structures in these reactions, and what are their oxidation

    asked by Tony
  46. intermediate icd 9 cm coding

    What are the codes for Intrauterine pregnancy, spontaneous delivery, single live born?

    asked by rachel
  47. algebra

    Find the.domain of g(h)=10/3-2x

    asked by Hunny5
  48. math

    what is the density in kg/m3 1500 and 100.65 of nh3

    asked by marh ivan
  49. maths

    24 = 2x / 4y

    asked by a
  50. math

    3x²+8x=35

    asked by need help
  51. Math

    Anyone help me?? :) How to solve: 5x2 = -(19/2x-1) and 2x2 + 45/2x - 18 = 0 With full solutions? Thank you :)

    asked by Karen
  52. maths

    the mass of a boy is 36.1kg when rounded off to 1 decimal place. If his mass is less than 36.1kg, what is his possible mass?

    asked by Joel
  53. chemistry

    why do you use Na2Co3 extract solution tor the analysis of anions

    asked by saiful
  54. Psychology

    Avis put off writing her term paper until three days before it was due. "It's not that big of a deal. I can whip it out in a couple of hours," she thought. As it turned out, this was not the case. She averaged two hours a night sleep as she struggled to

    asked by Nicci
  55. Trig

    Find [4(cos115+isin115)]^6

    asked by Jack
  56. English/Marketing

    Hi I wrote a paper for school and turn it in said it is 78% plagiarized I am upset because I did not use any of the sources they listed. I am stuck rewording my paper since I thought I did a good job on it. Are there any websites available to help me with

    asked by Mandy
  57. Algebra

    What is 3y^2-27? Explain please.

    asked by Maddie
  58. Geography

    conduct research to examine the sphere of influence of an organisation that renders a service in a community .eg.clinic,hospital,a local high school

    asked by sydney
  59. math

    a paintball is hot at a wheel that has a radius of 40 cm. it hits the very bottom of the wheel next to the road while the car is stopped at the red light. as the light turns green, the wheel rolls, and so does the paint. if it takes 3 seconds for the wheel

    asked by ..
  60. math

    a spaceship leaves the alien mother-ship and begins descending to earth. it descends 64m during the first second and 7m less during each second afterward. if the aliens invade after 10s, how far did the ship descend?

    asked by amy
  61. college algebra

    solve x^2e^x+9x^ex=0

    asked by Ash
  62. english

    using atleast five different pronouns, adverbs, and adjectives, write several sentences describing a recent interaction with a friend of a "ritual" you celebrate.

    asked by monique
  63. chemistry

    zinc displaces gold in seawater present int he form of gold (III) hydroxide. What mass of gold can be recovered if 20 moles of zinc are available?

    asked by luz
  64. Chemistry

    What volume of liquid water is produced from the combustion of 10.00 L of octane, C8H18? (density of octane=0.692 g/mL

    asked by Kelly
  65. math

    solve by the elimination method x+6y=12 -x+7y=1

    asked by Margie
  66. intermediate algebra

    factor completely. Remember to look first for a common factor. If a polynomial is prime, state this. -4t^2+64 -(4t^2-64 =((2t)^2-8^2) (a^2-b^2)=(a+b)(a-b)

    asked by Shay
  67. macroeconimics

    A bank has $120 million in total assets, which are composed of reserves, loans, and securities. It’s only liabilities are $120 million in transactions deposits. The bank exactly satisfies its reserve requirement and its total reserves equal $6 million.

    asked by Anonymous
  68. Math

    Andrew factored the expression 28x^3-42x^2+35x as 7x(4x^2+6x-5). But when Melissa applied the distributive law and multiplied out 7x(4x^2+6x-5) , she got 28x^3+42x^2-35x ; thus, Andrew’s solution does not appear to check. Why is that? Please help Andrew

    asked by Michael
  69. algebra

    if an angle is three times is complement determine its measure

    asked by annsa
  70. math

    Evaluate:24(12)-9/3. Find the answer and the solution.

    asked by Erica Anne C. Arellano
  71. algebra

    factor out the greatest common factor from the expression. 18x^7-14x^2

    asked by ROCKY
  72. Statistics

    A loaded coin is tossed 5 times, find the probability distribution for the number of heads, if heads are thrice likely to occur than tails. Let x be the number of heads that will turn up. Compute the probability associated to each value of X using the

    asked by Sapphire
  73. About work

    Hello am new at this work at home but i never find any good site i can work with pls help am from nigeria send me link of good work at home that can suit me nothing is small to earn. thanks

    asked by Adewale
  74. statistics in psychology

    11. Make up a scatter diagram with 10 dots for each of the following situations: (a) perfect positive linear correlation, (b) large but not perfect positive linear correlation, (c) small positive linear correlation, (d) large but not perfect negative

    asked by desiree
  75. math

    driving at 43 mpH, one covers 17 miles in how many seconds?

    asked by Anonymous
  76. chemistry

    Make a buffer solution with the following specification pH=5.5 Volume=2L total concentration=1M ... a) Name the components?... b) How many grams of each component would you use to make 2L of solution

    asked by Anonymous
  77. Sci 275

    Write a 250 to 350 word response to the following: · If you were an environmental researcher and were given funding to assist with one environmental issue, which of the following topics would you choose to spend your funds on? (I encourage you to use the

    asked by Katheryn Pe
  78. Chemistry Lab

    if i get 4 % of yield in the experiment of chemical reactions of copper and percent yield. Is there a possibility the experiment wa success? ~in my opinion it was success because ou theoritical yield is below 100 % ~i just need some opinion.

    asked by Yuni
  79. Calculus

    Decide whether to integrate with respect to x or y. Find the area of the region. y=e^2x y=e^6x x=1 I have no idea what to do

    asked by Sam
  80. English

    I left out the following sentences. By the way, thank you very much for helping me with the use of containers. 1)I’m staying over at Sheila’s tonight. The factory has shut down, and 2,000 people have lost their jobs. 2) My father is taking these

    asked by Henry2
  81. vetrianarian

    Which of the following theories asserts that all animal activity is learned, rather than genetically programmed?

    asked by nay
  82. college algebra

    the population of a certain geographic region is approximately 105 million and grows continuously at a relative growth rate of 1.53%. what will the population be in 5 years?

    asked by Ash
  83. math

    suppose you wanted to place 1,000,000 pennies in large coin banks. if you put 50,000 pennies in each bank, in which bank would you find the 678,230th penny?

    asked by anabelle
  84. 4th grade math

    suppose a bead maker wants to separate 10,000,000 beads into boxes. She will put 100,000 beads into each box. Into which box would she put the 4,358,216th bead?

    asked by lily
  85. math

    a paintball is hot at a wheel that has a radius of 40 cm. it hits the very bottom of the wheel next to the road while the car is stopped at the red light. as the light turns green, the wheel rolls, and so does the paint. if it takes 3 seconds for the wheel

    asked by ...
  86. math

    is one half greater than three fourths

    asked by mariel
  87. chemistry

    assume that 0.50 L of carbon dioxide is required for a loaf of bread. what mass of glucose must be broken down by yeast to produce this volume of carbon dioxide? (density of carbon dioxide at baking temp. is 1.25 g/L.

    asked by jim
  88. Pre cal

    )a function f is defined as f(x) = 3*2^x describe the end behavior of f, please describe in detail how you got the answer and explain your abbreviations.

    asked by Ashley
  89. Calculus

    Given f'(x)=7cosx–11sinx and f(0)=1, find f(x)= ____?

    asked by Brit
  90. intermediate algebra

    factor the following expression completely: 70w^3-125w^2+30w

    asked by Shay
  91. math

    thinking/inquiry/problem solving: a formula for the sum of the first n terms of an arithmethic series is Sn=n^2 + 4n. determin e the first four terms of the series.

    asked by llwelyn
  92. Health

    I am trying to understanding what is required " Identify one trend in global health and discuss how this trend may affect public health in your community." Am I right by thinking that this like how prevention of hiv by cdc can affect local communities. I

    asked by Nancy
  93. PSY 285

    how can social cognition may both positively and negatively affect one's attitudes and behaviors?

    asked by Ro
  94. Programming Concepts

    how do you Create a Web page that displays all numbers from 20 to 1 and indicates whether the number is prime in it displays?

    asked by Janice
  95. Math

    Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6

    asked by Peter
  96. lenasia secondary school

    reseach project chemical system: phosphates what is a super phosphate?

    asked by bertha
  97. scientist

    What is the law which states that volume and temperature are directly related?

    asked by Erica Anne C. Arellano
  98. Pre Cal

    Which of the following represents the graph of y=f(x) first shifted down 1 and reflected in the x-axis? a) y=f(-x)-1 b)y=-(f(x)-1) C)y=-f(x)-1 d) y=abs(f(x-1))

    asked by Ashley
  99. Pre Cal

    a Function f is defined as f(x)=3*2^x a)is f increasing or decreasing? b)write equation for the horizontal asymptote c)describe the end behavior of f

    asked by Ashley
  100. Pre Cal

    If the graph of f(x)=cotx is transformed by a horizontal shrink of 1/4 and a horizontal shift left pi, the result is what?

    asked by Ashley
  101. algebra

    use the "difference of squares" rule to factor the following expression. x^2-81

    asked by ROCKY
  102. sciencs

    what is denser, 1 grams of gold or 1 kilograms of copper? why?

    asked by chloe
  103. Occ

    (x^2 +4)y = 2x

    asked by peter
  104. chemistry

    can you give me examples of pictures just name it, ummm.. CHEMISTRY IN DAILY LIVING , TECHNOLOGY AND SOCIETY

    asked by Anonymous
  105. chemistry

    A level teaspoon may contain 4.0 grams of NaHCO3. How many moles does this represent?

    asked by michael smith
  106. Pre-Calc

    Vector v is (4√3,√3). Find the angle between v and i.

    asked by John
  107. chemistry

    Make a buffer solution with the following specification pH=5.5 Volume=2L total concentration=1M ... a) Name the components?... b) How many grams of each component would you use to make 2L of solution

    asked by Anonymous
  108. physics

    A body of specific gravity 3.0 is immersed in water. What is the minimum force required to pull it out at velocity 2

    asked by divya
  109. english

    Identify the noun clause in the following sentence: What they should do is hire a tutor who can help them with their math skills.

    asked by Eric
  110. algebra

    factor out the greatest common factor from the expression 18x^5+48x^2-30x

    asked by ROCKY
  111. Pre-Calc

    Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6

    asked by Peter
  112. math

    Use the “difference of squares” rule to factor the following expression 49-4y^2 Thanks :)

    asked by Mary Anna
  113. Medical Transcription

    1. This is an 18-month-old boy who was healthy until about 8 days ago when his mother noted reddened blotches on his neck and trunk particularly his upper back.

    asked by Sarah Stewart
  114. Math

    If f(x)=5x+2 and g(x)=x^2+3, then what is f(g(x))?

    asked by Kate
  115. chemistry

    why do you use Na2Co3 extract of anions

    asked by saiful
  116. Pre-Calc

    Find [4(cos115+isin115)]^6

    asked by Ben
  117. Pre Cal

    Which of the following represents the graph of y=f(x) first shifted down 1 and reflected in the x-axis? a) y=f(-x)-1 b)y=-(f(x)-1) C)y=-f(x)-1 d) y=abs(f(x-1))

    asked by Ashley
  118. Pre Cal

    a Function f is defined as f(x)=3*2^x a)is f increasing or decreasing? b)write equation for the horizontal asymptote c)describe the end behavior of

    asked by Ashley
  119. Pre Cal

    If the graph of f(x)=cotx is transformed by a horizontal shrink of 1/4 and a horizontal shift left pi, the result has what equation?

    asked by Ashley
  120. math

    Use the “difference of squares” rule to factor the following expression 49-4y^2 my answer is going to be (7-2y)(7-2y) I wasn't sure if it could of been (7-2y)(7+2y)

    asked by Natalie
  121. Financial management

    Answers five questions involving concepts of time value of money.

    asked by chichi
  122. CGD 218

    Do you think TV or Film is more effective for marketing?

    asked by meshelle
  123. Chemistry

    an electron has an uncertainty in its position of 552 pm. what is the uncertainty in its velocity?

    asked by Katie
  124. statistics

    Assuming that the correlation between IQ scores and GPA scores is +.87, explain what this means.

    asked by redd
  125. college algebra

    e^-3-1x+22=0

    asked by Ash
  126. Pre Cal

    what does it mean when it says describe the end behavior of f and whats that for f(x)=(x^2+x+3)/(x-1) and f(x)= 3*2^x, please explain everything, and if you use --> tell me what that means, cuz i have no clue

    asked by Ashley