Popular questions and responses by Nicki

    A boxcar of mass 200 tons at rest becomes uncoupled on a 2.5 degree grade. If the track is considered to be frictionless, what speed does the boxcar have after 10 seconds?

    asked on October 19, 2008
  2. Math

    Los Angeles is about 385 miles from San Francisco. How far apart would the cities be on a map with a scale of 1 in. = 25 mi? If necessary, round to the nearest hundredth.

    asked on November 21, 2012
  3. math

    The cost c (in dollars) for the fuel and maintenance of a go-cart is given by c=10x+1200 c=10x+1200 , where x is the number of rides. It costs $40 per ride. How many rides does it take to break even?

    asked on November 15, 2016
  4. biochemistry

    How do you calculate the PH of a buffer solution prepared by mixing 75 mL of 1.0 M lactic acid and 25 mL of 1.0 M sodium lactate?

    asked on September 18, 2010
  5. 12th grade math

    Identify the domain and range: 1.) y = x^2 / 4x^2 - 1 2.) y = -3 / (x+2)^2 + 1 3.) y = ³√-x^2

    asked on September 13, 2010
  6. Physics

    An arrow, starting from rest, leaves the bow with a speed of 28.8 m/s. If the average force exerted on the arrow by the bow was increased 2 times and the arrow was accelerated over the same distance, then with what speed would the arrow leave the bow?

    asked on September 27, 2013
  7. science

    How would your results have differed if you had over-titrated, i.e. added NaOH beyond the endpoint?

    asked on November 12, 2012
  8. Algebra 2

    A five gallon bucket of tar can seal 3500 square feet of blacktop. If a parking lot is 15000 square feet, how many buckets of tar must be purchased in order to seal it?

    asked on September 8, 2016
  9. science

    A bullet is moving with speed of 500m/!@#$%^& the target and penetrate 100mm into the target. Find the retardation of the bullet.

    asked on June 28, 2016
  10. Biology

    1. Describe 2 methods of viral infection 2. How can a virus be helpful to its host? Thank you:)

    asked on September 27, 2014
  11. PLEASE HELP! Google?

    Sorry I'm posting again. I need to find the obesity rates of the countries Romania, Russia, and Rwanda by gender. (for example ___ percent of Russian women are overweight; _____ percent of Russian men are overweight). I can't find any websites! D: Anny

    asked on March 30, 2011
  12. science

    What is the name of the process when carbon dioxide moves blood to the alveoli?

    asked on January 13, 2011
  13. algebra

    Given 3+i is a root, determine all other roots of f(x)=x^4-2x^3-x^2-38x-130.

    asked on December 17, 2009
  14. 8th grade Math

    A fish tank 24 inches long, 16 inches wide, and 12 inches high is 3/4 full of water. By how many inches will the water level rise if you should add 576 cubic inches of water?

    asked on August 24, 2009
  15. Chemistry

    I'm working on single replacement reactions. I know about flipping elements around, like Au+PtF yields AuF+Pt. However, I'm not sure how to do it when there's multiple elements like Al+AgC2H3O2. What would the answer be, and how would you decide what to

    asked on April 16, 2009
  16. Chemistry

    I lost the periodic table my teacher gave me, and I need to find one online that shows charges at the top in columns, as well as charges for the elements with multiple charges online. Could you lead me to any good sources? Thanks

    asked on April 16, 2009
  17. History

    Who started the Red Scare?

    asked on November 30, 2019
  18. Finite math Probability

    Dependent events are one or more events than influences the probability of another event. Conditional probability is NOT a measure that influences one or more events. True or false

    asked on June 2, 2018
  19. Math

    The radius of the larger circle is 9cm. The diameter of the smaller circle is 11cm. Find the area of the shaded region The shaded area is between the larger circle and smaller circle . It is concentric The area of the larger circle is 81Ï€. The smaller

    asked on February 3, 2017
  20. Math/ slope

    write equation of line through the point ( -3,2) and slope of 1/4 in slope intercept form

    asked on February 2, 2017
  21. Very quick question biology

    I'm working on a biology project where I must make a molecule of glucose. I have finished my molecule but I want something in the middle of it which is the "centrepiece ". Can anyone give me any ideas of some things glucose is found in (food) in which I

    asked on February 28, 2016
  22. Math

    The circular area A in square centimetres of a healing wound is given by A(r)=πr^2 Where r =the radius in centimetres. Find the rate of change of the area with respect to the radius. My work: I'm not really sure if this is correct but I gave it a try.

    asked on February 24, 2016
  23. Microsoft Word Powerpoint 2013

    i need answers to the pen foster exam

    asked on February 24, 2016
  24. Math

    find the derivative or f'(x) F(x)= √X+h - √x /h

    asked on February 21, 2016
  25. Math

    √X+h - √x /h

    asked on February 20, 2016
  26. Math

    A typist can type 146 words in 100 seconds. At this rate, how many minutes and seconds would it take him to type 657 words.

    asked on October 25, 2014
  27. Math

    What can you multiply an expression by to eliminate the imaginary part of the denominator? 1.) (2+4i)/3i= 2.) (1-2i)/2i=

    asked on October 8, 2014
  28. science 2 quick questions

    1. Describe 2 methods of viral infection 2. How can a virus be helpful to its host? I don't want sites because they don't help, please help me and explain . All my other questions r done but I'm stuck on these 2.

    asked on September 28, 2014

    1. Describe 2 methods of viral infection 2. How can a virus be helpful to its host? Please this is very urgent, I have finished everything else but these r my last 2 questions that I don't know! Please help! Thanks:)

    asked on September 28, 2014

    1. Describe 2 methods of viral infection 2. How can a virus be helpful to its host? Thanks:)

    asked on September 28, 2014
  31. pol 201

    Should the Supreme Court's power of judicial review be strictly limited by a constitutional amendment? In answering either question, clearly state your position (thesis) at the beginning of your post. Define important terms and explain your position fully.

    asked on July 24, 2014
  32. algebra 1

    and I need help on this one problem This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS). would a graph model this problem situation?

    asked on November 23, 2013
  33. algebra 1

    can somebody help me please!

    asked on November 22, 2013
  34. algebra 1

    . Marissa is a photographer. She sells framed photographs for $100 each and greeting cards for $5 each. The materials for each framed photograph cost $30, and the materials for each greeting card cost $2. Marissa can sell up to 8 framed photographs and 40

    asked on November 22, 2013
  35. algebra 1

    This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

    asked on November 22, 2013
  36. physics

    a stone whirled at the end of a rope 30cm long makes 10 comlpete revolution in 30 seconds find the angular velocity in radians per seconds

    asked on October 27, 2013
  37. chemistry

    1)A solution has a [OH-] of 5.2 x 10-4. What is the [H3O+] in the solution? 2) A 0.25 M solution of a monoprotic acid, HA, has a pH of 2.54. What is Ka for this acid? The dissociation of HA is: HA + H2O H3O+ + A- (Hint: write the expression for pH) 3 A

    asked on December 9, 2012
  38. math

    i dnt know how to do this can u8 help me

    asked on October 3, 2012
  39. Mte 181

    A Grasshopper can jump 19 times his length. If humans were proportional to grasshopper but based on height how far could a 5'9 person jump? Explain.

    asked on July 13, 2012
  40. Mte 180

    Is a rhombus regular because the sides are congruent is this statement true or false. Explain reasoning,

    asked on July 13, 2012
  41. Met 181

    Joe and Peter have 360 day membership to a tennis club. Joe will use it every other day. Peter will use it every third day. They both use the club on day one. How many days total out of 360 will at least one of them use the club. Please explain.

    asked on July 13, 2012
  42. Mte 181

    You have a heptagon with the following interior angles 125, 130, 175, 105, 165, 25. What's the measurement of the 7th angle and why?

    asked on July 12, 2012
  43. Grammar/Morphemes

    In the word ecologists, is eco the root morpheme or ology? Are the morphemes eco, log, y, ist, s or ec, ology, ist, s ? This is very confusing for me. Any explanation on how to find the root would be appreciated. It's easy to find roots on some words, but

    asked on March 19, 2012
  44. Math

    Some of Helen's plants need water every day, some need water every other day, and others need water every third day. If she waters them all today, how many days will it be before she waters them all again?

    asked on February 7, 2012
  45. math

    if a bag contains 6 red and 4 blue marbles and one is taken out and not put back and another is taken out is the problility that both are red

    asked on September 27, 2011
  46. Math

    Math help please? Eric, Jose, Shannon, and Jackie wanted to plant a garden. Jose’s dad said they could use a rectangular space in the backyard that was 8 m by 4 m. The friends decided they would first like to make a colorful border for the garden using

    asked on July 28, 2011
  47. Physics

    A flower pot is dropped out of the twentieth story window. How far does the pot drop in 3 seconds? How fast will it be moving after 7 seconds?

    asked on June 21, 2011
  48. Marketing

    Please help. How do organizational and consumer markets differ? What are the implications of both of these kinds of differences for developing marketing programs?

    asked on May 26, 2011
  49. Good Reads? 6th and 7th grade

    Please. I need a list of Non-fiction books recommended for 6th and 7th grade readers. Thank you and have a nice day. God bless!

    asked on May 24, 2011
  50. Math Word Problem

    Need a formula for this math problem. Help!? Relinda owns a tea shop and is creating a new mix of tea for her customers. She is using a standard black tea that sells for $7 per pound and a special orange flavor that sells for $11 per pound. She is planning

    asked on April 27, 2011
  51. Math

    if two polygons are congruent, then they are similar. What is the contrapositve of this statement?

    asked on April 25, 2011
  52. Math. Please help!

    144/k=9 I don't understand how to do this using reciprocals, how my teacher wants me to solve the problem. Note: The fraction bar is in my paper, so it's 144 being the numerator, k being the denominator, and then =9 if that makes any sense.

    asked on April 25, 2011
  53. Math

    Suppose there are 500 pennies in a row... (math problem)? The pennies are all "heads up" Now suppose that 500 people line up and ... Person #1 turns over all the pennies Person #2 turns over every 2nd penny, starting with penny number 2 Person #3 turns

    asked on April 25, 2011
  54. chem

    The element X has an atomic mass of 12.80 amu. It is known to have two isotopes 12X and 13X. Which of the following is true about the relative abundancies of 12X and 13X? a) both isotopes occur with the same frequency. b)12X occurs more frequently than 13X

    asked on December 1, 2010
  55. chemistry

    Are amino acids other than the usual 20 amino acids found in proteins? If so, how are such amino acids produced?

    asked on October 29, 2010
  56. biochemistry

    What amino acids have no chiral atoms?

    asked on October 28, 2010
  57. Math

    Which of the following is NOT a real number? (Please explain why!) (1) -1 (I already ruled out this answers because integers can be real numbers) (2) square root of 3 (3)square root of -3 (4)0.101001000100001...

    asked on October 28, 2010
  58. chemistry

    What are three thermodynamic quantities that are not state functions and three that are?

    asked on October 5, 2010
  59. Biochemistry

    How do you calculate the free energy change for the acetyl phospahate hydrolysis in a solution of 2 mM acetate, 2 mM phosphate and 3 nM acetyl phosphate. The standard state free energy of hydolysis of acetyl phosphate is /\G = -42.3 kJ/mol.

    asked on October 4, 2010
  60. chemistry

    What is the net ionic equation for chlorine ion and silver nitrate reagent?

    asked on September 27, 2010
  61. chemistry

    If you mixed equal volume of .1 M HCl and .20 M Tris (pka=8.3), IS THE RESULTING SOLUTION A BUFFER SOLUTION? Why? or Why not?

    asked on September 18, 2010
  62. math

    Two boys divide a profit of $36 in the ratio of 5:3. How much does each boy get?

    asked on April 1, 2010
  63. algebra 2

    p^5 p^-4 z^2 divided by z^-5 zp^3 -21a^2 b^8 divided by -18a^-4 b^10 (2kr^3)^-3 divided by 4k^-2 r^6

    asked on January 6, 2010
  64. College Algebra.

    Find the equation in standard form of the hyperbola that satisfies the stated condition. Foci (0,5) and (0,-5), asymptotes y = x and y =-x

    asked on December 17, 2009
  65. College Algebra.

    Find the equation in standard form of the ellipse, given Center (-2,4),vertices (-6,4) and(2,4) foci (-5,4) and (1,4)

    asked on December 17, 2009
  66. Algebra

    Do I have this right? A first degree polynomial crosses the x axis A second degree polynomial touches the y axis without crosisng A third degree polynomial flattens against the y axis.

    asked on November 30, 2009
  67. Algebra

    solve by elimination method; 3r-7s=13, 7r-3s=69

    asked on November 1, 2009
  68. 6th grade science

    what is the purpose of testing variables I am stuck, can you help me?

    asked on June 6, 2009
  69. Chemistry

    Which element has a greater electroniegativity, Al or Ge. I wasn't sure, since Al was further up, but Ge was further right. Thanks for your help.

    asked on April 17, 2009
  70. Latin

    What does the sentence victoria numerum servorum non augebit translate to? I got-the victory did not add to the many servant. This makes no sense, since many and servant do not agree. What is the correct translation? And thank you

    asked on April 15, 2009
  71. History

    I'm trying to find evidence online that the 1920's or World War I was known as the Lost Years. I remember hearing this before. Is this true? Why is it called this? Thanks for explaining this.

    asked on April 14, 2009
  72. History

    Where can I find out what percentage of American soldiers receive psycological effects after war?

    asked on April 14, 2009


    asked on January 23, 2008
  1. Mth 156

    PRT Formula 35,000(.06)(6years) = 1260

    posted on November 30, 2019
  2. Life orientation


    posted on April 21, 2019
  3. Language Arts

    man give us the answers

    posted on March 12, 2019
  4. Finite math Probability

    I have read this website over and over and see reason why this is true and why it is false. Can you help and explain why?.

    posted on June 2, 2018
  5. Finite math Probability

    I believe the answer is FALSE

    posted on June 2, 2018
  6. Math :-)

    Explain why knowing the height is needed when finding the perimeter of a right triangle.

    posted on February 23, 2017
  7. Geometry

    IDK ask someone DUH

    posted on January 1, 2017
  8. chemistry

    No, because it's the valence electrons on the metals that take/release energy in the form of visible emissions, not the chloride or fluoride ions.

    posted on March 19, 2016
  9. Math

    I'm very confused ?

    posted on February 24, 2016
  10. english

    How do the other men defer to Caesar? in act 2 scene 1

    posted on February 22, 2015
  11. science 2 quick questions

    Oh ok I understand now:) thank u:)

    posted on September 28, 2014
  12. statistics

    the 2 k rule

    posted on May 31, 2014
  13. Chemistry

    I'm not certain, but is it possible that the answer is: 1.32 ?

    posted on April 23, 2014
  14. algebra 1

    What is the meaning of the point x=-40 on the graph? Explain.

    posted on November 23, 2013
  15. algebra 1

    what are the domain and range of the part of the function that is graphed previously?

    posted on November 23, 2013
  16. algebra 1

    okay that's fine can you help me with one more thing though?

    posted on November 22, 2013
  17. algebra 1

    please help me

    posted on November 22, 2013
  18. Science

    xrays for molecules Cold virus- UV

    posted on November 22, 2013
  19. algebra 1

    and I need help on this one problem During the fall in the Northern Hemisphere, the amount of daylight decreases each day. On September 21st, the daylight in a certain town was changing according to the equation y=-0.05x + 12 , where x = time in days and y

    posted on November 22, 2013
  20. Science

    The frequency of a wave, represented by the letter f, is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The SI unit of cycles per second is called hertz or Hz. Hz can be expressed as a reciprocal

    posted on November 22, 2013
  21. algebra 1

    that it doesnt represent the equation

    posted on November 22, 2013
  22. algebra 1

    Does the table that follows represent this equation? Explain/justify your answer by making references to the ordered pairs in the table. T C 0 0 3 64 6 124 9 184 12 244 For B I think no

    posted on November 22, 2013
  23. algebra 1

    thats the function sorry

    posted on November 22, 2013
  24. algebra 1

    c = 20T + 4

    posted on November 22, 2013
  25. algerbra 2

    . Explain your inequalities and explain why and are also inequalities for this system

    posted on November 22, 2013
  26. Science

    that exact order

    posted on November 22, 2013
  27. Science

    gamma rays x-rays ultraviolet visible ( v i b g y o r) infrared microwave radio

    posted on November 22, 2013