Samantha

Popular questions and responses by Samantha
  1. chemistry

    what volume (in ML) of a 0.150 M HNO3 solution is required to completely react wtih 35.7 mL of a 0.108 M Na2CO3 solution according to the following balanced chemical equation? Na2CO3(aq) + 2 HNO3(aq) --> 2NaNO3(aq) + H2O(l) then, in the reaction above,

    asked on June 21, 2010
  2. Math

    Sue left her home at 6 A.M. driving her car at the rate of 50 miles per hour. At 8 A.M. her brother Kevin drove after her along the same highway, traveling at the rate of 60 miles per hour, in how many hours did Kevin pass Sue? I got 10 hours but that is

    asked on July 24, 2018
  3. Trig Help Please

    A smokestack is 200 ft high. A guy wire must be fastened to the stack 30.0 ft from the top. The guy wire makes an angle of 42.0° with the ground. Find the length of the guy wire.

    asked on May 7, 2017
  4. science

    Calculate the density of sulfur hexafluoride gas at 703 torr and 23°C. density is mass/volume so how do i get those from what i am given? also ) Calculate the molar mass of a vapor that has a density of 6.735 g/L at 11°C and 743 torr.

    asked on December 15, 2012
  5. math

    Sheila cuts a 60 foot wire cable in equal strips of 4/5 of a feet each. how many strips does she make?

    asked on June 25, 2011
  6. english

    Snow skiing is a very exciting sport. what type if sentence pattern is this? S-v,s-v-io, s-v-io-do,e-v-s,s-lv-pn,s-lv-pa, s-v-do-oc, question pattern

    asked on July 10, 2012
  7. college chemistry

    What is the entropy change for the vaporization of 2.6 mol H2O(§¤) at 100◦C and 1 atm? dH= 40700 J/mol Answer in units of J/K

    asked on November 19, 2010
  8. CALCULUS. Check my answers, please! :)

    The domain of f(x)=(1)/(sqrt(x^2-6x-7)) is (1, 7) [-1, 7] x > -1 or x < 7 ***{x < -1}U{x > 7} (-∞, -1]U[7, ∞) 2. In which of the following is y a function of x? I. y^2=9-x^2 II. |y|=x III. y=(sqrt(x^2))^3 I only II only III only ***I and III only I, II

    asked on October 5, 2013
  9. Calculus, check my answers, please? :)

    Okay, so I think these are right, but I would appreciate if someone could check them and tell me if something is wrong and what the right answer is. I'd also appreciate an explanation if possible. :)Thank you! 7. Given that f(x)={x^3 if x ≥ 0 {x if x < 0

    asked on October 2, 2013
  10. Calculus, check my answers, please! 3

    Did I get these practice questions right? 1. Suppose that f is an even function whose domain is the set of all real numbers. Then which of the following can we claim to be true? ***The function f has an inverse f –1 that is even. The function f has an

    asked on October 2, 2013
  11. Mathematics

    A drug response curve describes the level of medication in the bloodstream after a drug is administered. A surge function S(t) = At^(p)e^(−kt) (where t > 0) is often used to model the response curve, reflecting an initial surge in the drug level and then

    asked on January 17, 2016
  12. Pre calc

    An equation is given. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three decimal places where appropriate. Find All solutions of the equation 2sin(theta/3)+ square root three =0

    asked on April 19, 2017
  13. chemistry

    what volume (in L) of 0.150 M KCl solution is required to completely react with 0.150 L of a 0.175 M Pb(NO3)2 solution according to the following balanced chemical equation? 2KCl (aq) + Pb(NO3)2 (aq) --> PbCl2 (s) + 2 KNO3 (aq)

    asked on June 21, 2010
  14. mat222

    Suppose that the function h is defined, for all real numbers, as follows. =hx −4 if x2 Find h0 , h2 , and h5 .

    asked on March 15, 2017
  15. Check my CALCULUS answers please!

    Any short explanation for things I got wrong would be great, too, if possible! Thanks in advanced! :) 8. Which of the following functions grows the fastest? ***b(t)=t^4-3t+9 f(t)=2^t-t^3 h(t)=5^t+t^5 c(t)=sqrt(t^2-5t) d(t)=(1.1)^t 9. Which of the following

    asked on October 7, 2013
  16. Math

    The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. If two light sources, one four times as strong as the other, are placed 11 ft

    asked on November 14, 2011
  17. Writing Skills Part 4

    2.which of the following would most likely be an entry in a topic outline? A.Toys can be gender - neutral. *B.Toys children love C.Quality toys should require some imagination D.It's possible for toys to be both educational and entertaining. Thank you for

    asked on March 2, 2015
  18. Calculus - Limits. Check my answer, please! :)

    Suppose that h(x)={x^2-x+5 if x2 Which of the following is equal to 7? I. lim h(x) x->2- II. lim h(x) x->2+ III. lim h(x) x->2 I only II only ***III only I and II only I, II, and III

    asked on October 6, 2013
  19. Math

    A football team lost 9 yards on each of three consecutive plays. What was the team's total change in position for the three plays?

    asked on September 14, 2017
  20. College Chemistry

    Calculate the unknown of Ag+ if the potential of the following concentration cell is 300 mV at 25.0 C. Ag|Ag+(unknown)||Ag+(0.100M)|Ag I think I have to use Nernst Equation of Ecell=E0-.0592/nlogQ And at 25C is at 298K so i don't have to change anything. I

    asked on May 6, 2015
  21. Calculus, check my answers, please!

    Could someone tell me if I'm right, and if not what the correct answer is? Thank you! I'd appreciate an explanation, too, if you could. :) 1. Suppose you're given the following table of values for the function f(x),and you're told that the function is

    asked on October 2, 2013
  22. science

    Five lines in the H atom spectrum have the following wavelengths in Ǻ: a). 1212.7, b). 4340.5, c). 4861.3 d). 6562.8 and e). 10938. Three lines result from transitions to the nf = 2. The other two result from transitions in different series, one with nf =

    asked on April 1, 2010
  23. US Government

    What language is used to describe the role of the Senate in Supreme Court nominations

    asked on August 21, 2009
  24. Chemistry

    When ammonium chloride is dissolved in water, the solution becomes colder. What can you say about the relative magnitudes of the lattice energy of ammonium chloride and its heat of hydration? Why does the solution form? What drives the process?

    asked on September 20, 2010
  25. Genetics

    If a man with blood type B, one whose parents had blood type O, marries a woman with blood type AB, what will be the theoretical percentage of their children with blood type B?

    asked on May 8, 2019
  26. English

    1. All of the following quotes from "The Swimming Contest" are intended to foreshadow the future conflict between the narrator and Abdul-Karim EXCEPT A. "But it's not true that we're driving the Arabs out. We are out for peace, not war."***** B.

    asked on May 12, 2017
  27. Finance

    Newdex has net income of $2,500,000 and 1,000,000 shares outstanding. It needs to raise $3,610,000 in funds for a new asset. Its investment banker plans to sell an issue of common stock to the public for $40 per share, less a spread of 5%. How much must

    asked on May 14, 2010
  28. Math (Algebra/Pre-Algebra)

    What is the 23rd term in the arithmetic sequence: 11, 14, 17, 20...? All I need is the formula to find the it because I have to show work. Thanks.

    asked on June 4, 2009
  29. Genetics

    Suppose that gene b is sex-linked, recessive, and lethal. A man marries a woman who is heterozygous for this gene. If this couple had many normal children, what would be he predicted sex ratio of these children?

    asked on May 8, 2019
  30. Physical education

    What are the branches of physical education?

    asked on September 14, 2018
  31. Chemistry

    Ethanol, C2H5OH, is mixed with gasoline and sold as gasohol. Use the following to calculate the grams of ethanol needed to provide 367 kJ of heat. C2H5OH(l) + 3 O2(g) ¨ 2 CO2(g) + 3 H2O(g) ƒ¢H = −1235 kJ

    asked on November 21, 2011
  32. Algebra

    a theater wants to take in at least $2000 for a certain matinee. children's tickets cost $5 each and adult tickets cost $10 each. the theatre can seat up to 350 people. find five combinations of children and adult tickets that will make their goal.

    asked on January 4, 2016
  33. algebra

    If x2 = 20, what is the value of x? ±square root of 10 ±square root of 20 ±10 ±40

    asked on October 7, 2015
  34. chemistry

    Write a balanced equation for the reaction between perchloric acid and lithium carbonate.

    asked on April 14, 2015
  35. Chemistry

    What is the mass, in grams, of a pure iron cube that has a volume of 4.30 cm3?

    asked on February 2, 2015
  36. Pre calc

    Find all primary solutions (i.e. 0 ≤ θ < 2π ) of the equation cos(2θ ) = 4 − 3 cos(θ ). Find all primary solutions (i.e. 0 ≤ θ < 2π ) of the equation cos(2θ )cos(θ ) = sin(2θ )sin(θ ). Please can somone help and show all work Thank you

    asked on April 20, 2017
  37. Writing Skills Part 4

    1.When creating a writing plan,which of the following should come first? *A.Material that will capture the reader's interest B.The first section of the body of the essay C.A brief summary of the conclusion 2.Which two things must be accomplished by the

    asked on March 2, 2015
  38. Calculus - #6

    If the following function is continuous, then what is the value of b? g(f)={2t^2+2t-24 if f≠3 {b if f=3 0 3 7 14 None of these If the following function is continuous, then what is the value of a? h(f)={2t+b if f(pi/2) 0 1 2 4

    asked on November 6, 2013
  39. Physical education

    What are the branches of physical education?

    asked on September 14, 2018
  40. social studys

    what was the purpose of the war production board A. to tell factories how many planes or tanks each factory had to produce. B. to help factories shift from making consumer goods to making war materials.****** C. to ship war materials over to the allies D.

    asked on March 6, 2017
  41. algebra

    The 4200 km trip from New York to San Francisco take 6 h flying against the wind but only 5 h returning. Find the speed of the plane in still air and the speed of the wind.

    asked on November 7, 2012
  42. statistics

    assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 20. find the probability that a randomly selected adult has an IQ less than 20.

    asked on March 14, 2012
  43. Physics

    What is the magnitude of the force per meter of length on a straight wire carrying an 8.50 -A current when perpendicular to a 0.55 -T uniform magnetic field?

    asked on April 6, 2011
  44. math

    Name the property of real numbers illustrated by the equation -3(x+4)=-3x-12

    asked on January 24, 2018
  45. College algerba

    The​ half-life of a certain radioactive element is about 1500 years. After 2800 ​years, what percentage P of a sample of this element​ remains?

    asked on November 14, 2016
  46. maths

    express 40% of right angle into radian measure. express two third of straight angle into radian. express sum of angles of a quadrilateral intoradian.

    asked on March 17, 2015
  47. Writing Skills Part 3

    1.Under the Library of Congress system,where would you begin to research for books on the legal system of Greece? A.E B.k C.U [ D.G] 2. You've located three books on a topic you're researching for an essay.The first thing you should do in determining if

    asked on March 2, 2015
  48. Physics

    A 61-kg snow skier is being pulled up a 14 ° slope by a steel (Young's modulus 2.0 x 1011 N/m2) cable. The cable has a cross-section area of 7.0 x 10-5 m2. The cable applies a force to the skier, and, in doing so, the cable stretches by 2.1 x 10-4 m. A

    asked on November 23, 2013
  49. Calculus, check my answer, please! 1

    Did I get this practice question right? 1. Consider the following functions: f(x)=cos(x^3-x) h(x)=|x-3|^3 g(x)=1n(|x|+3) s(x)=sin^3(x) Which of the following is true? (Points : 1) f is even, h and s are odd. ***f and g are even, s is odd. h and s are odd,

    asked on October 2, 2013
  50. elements of design

    1. Study the following sentence, then select the answer that best describes it. THE COW JUMPS OVER THE MOON! A. Italic serifed type B. Bold roman sans serif type C. Bold italic sans serif type(my answer) D. Bold roman serifed type 2. Which one of the

    asked on February 7, 2012
  51. world history

    which kingdom controlled caravan trade routes in A.D.900?

    asked on June 29, 2011
  52. chemistry help!

    A sample of methane gas, CH4 was collected over water at 25 degrees celcius and 720 torr. The volume of the wet gas is 2.50L. What will be the volume of the dry methane at a standard pressure?

    asked on December 1, 2010
  53. math

    Use the quadratic formula to solve the equation -x^2 + 7x = 8

    asked on January 24, 2018
  54. math

    which matrix represents the system of equations below -12x-13y+13z=15

    asked on January 24, 2018
  55. English

    1. Identify the correctly punctuated sentence. A. Monarch butterflies migrate long distances each year—other butterflies live in southern climates throughout the year. B. Monarch butterflies migrate long distances each year, other butterflies live in

    asked on May 12, 2017
  56. English

    1. Read the following passage from "The Swimming Contest." With a sigh my mother replies, "My husband's no longer alive, either. But his house and his father's house aren't here; everything remained over there, abroad, and I live in a rented apartment

    asked on May 12, 2017
  57. social studys

    Compare and contrast the rise and fall of Germany and japan during the period of world war Il Please help me with this.

    asked on March 20, 2017
  58. biochemistry

    Which statements about hydrogen bonds are correct? 1) Hydrogen bonds are the interaction between a hydrogen atom bonded to an electronegative element and the lone pair of electrons on a nearby electronegative atom. 2) The atom to which the hydrogen atom is

    asked on February 4, 2017
  59. biochemistry

    Suppose the concentration of glucose inside a cell is 0.1 mM and the cell is suspended in a glucose solution of 0.01 mM. What would be the free energy change involved in transporting 10?6 mole of glucose from the medium into the cell? Assume T= 37 ?C.

    asked on February 4, 2017
  60. History...Please Help

    PHOENIX, Sept. 20, 2012- Arizona's new immigration law takes effect this week. According to the law, police officers must check the status of anyone who may be an undocumented immigrant. Officers have the right to decide who is checked under this law. A

    asked on November 20, 2015
  61. Math

    Why does Zara have a good driving record?

    asked on September 1, 2014
  62. Calculus

    Which of the following is a separable, first-order differential equation? A) dy/dx= x+y/2x B) dy/dx=x+y/x-y C) dy/dx=sinx

    asked on May 8, 2014
  63. Geometry

    Three vertices of a kite are (1,8), (1,0), and (4,6). What is the fourth vertex?

    asked on November 24, 2013
  64. Geometry

    Name all of the possible different rays that can be formed from the three points below: A B C

    asked on November 21, 2013
  65. Check my CALCULUS work, please! :)

    Question 1. lim h->0(sqrt 49+h-7)/h = 14 1/14*** 0 7 -1/7 Question 2. lim x->infinity(12+x-3x^2)/(x^2-4)= -3*** -2 0 2 3 Question 3. lim x->infinity (5x^3+x^7)/(e^x)= infinity*** 0 -1 3 Question 4. Given that: x 6.8 6.9 6.99 7.01 7.1 7.2 g(x) 9.44 10.21

    asked on November 11, 2013
  66. Math

    A rose garden is designed by joining a rectangle and a semicircle, as shown below. The rectangle is 29ft long and 17ft wide. If the gardener wants to build a fence around the garden, how many feet of fence are required? (Use the value 3.14 for pi, and do

    asked on April 18, 2013
  67. chemistry

    Arrange the following oxides in order of increasing acidity: P2O5, As2O5, N2O5, SnO2, SeO3, and BaO. (Use the appropriate symbol to separate substances in the list.) I have no idea how to do this! please help!

    asked on November 25, 2012
  68. statistic help

    Z score for worlds tallest man- Bao Xishun is the worlds tallest man with a height of 92.95 inch(or 7ft,8.95 inch).men have heights with a mean of 69.6 in. And a standard deviation of 2.8 in. 1. Convert Boa's height to a z score? 2. Does Boa's height meet

    asked on September 18, 2011
  69. math

    Sheila cuts a 60 foot wire cable in equal strips of 4/5 of a feet each. how many strips does she make?

    asked on June 25, 2011
  70. Chem

    Some very effective rocket fuels are composed of lightweight liquids. The fuel composed of dimethylhydrazine (CH3)2N2H2 mixed with dinitrogen tetroxide was used to power the Lunar Lander in its missions to the moon. The two components react according to

    asked on February 24, 2009
  71. Math

    Solve the system of equations using Row Operations x + y - z = 6 3x - 2y + z = -5 x + 3y - 2z = 14

    asked on May 9, 2018
  72. math

    The Nuthouse offers a mixture of soy nuts and almonds. Almonds sell for $7 per pound and soy nuts sell for $5.50 per pound. The Nuthouse will make 20 pounds of the mixed nuts and sell the mixture for $5.95 per pound. The following equations represent the

    asked on September 25, 2017
  73. Mat222

    Suppose that the functions S and T are define for all real numbers x as follow. s(x)=x-3 t(x)=3x+1 Write the expressions for (s-t)(x)and (s.t)(x) and evaluate (s+t(-2)

    asked on March 28, 2017
  74. Physics

    An object consists of 5 masses, each of mass m, connected by massless rods. The two short rods have length L and the two long rods have length 2L. What is the moment of inertia about an axis perpendicular to the diagram (out of the page) and through the

    asked on November 10, 2016
  75. Math calculation

    A stock bottle contains 2.5 L of solution. How many 2 oz bottle can be filled using the stock solution?

    asked on May 14, 2016
  76. math

    a wire is bent to form four semicircles all with diameters of 32 cm, how long is the wire? round to the nearest hundredth

    asked on May 7, 2016
  77. langauge arts

    Which of the following forms of poetry expresses the thoughts and feelings of a single speaker, often in highly musical verse. Limerick my answer Free verse Haiku Lyric Which of the following pairs of poetry elements best help the reader to identify the

    asked on January 19, 2016
  78. Math

    Hi y’all, me again. Can you help me on this? I got some answers, and I hope they are all right. Please let me know! Thanks! :) 1.2(y + 1) for y = 2 A. 6 B. 5 C. 7 D. 8 Is it “A”? 2. The cost in dollars of a school banquet is 74 + 12n, where n is the

    asked on December 7, 2015
  79. algebra

    A rich merchant had collected many gold coins. He did not want anybody to know about them. One day, his wife asked, "How many gold coins do you have?" After pausing a moment, he replied, "Well! If I divide the coins into two unequal numbers, then 25 times

    asked on September 9, 2015
  80. chemisty

    A cylinder with a moving piston expands from an initial volume of 0.350L against an external pressure of 2.70atm . The expansion does 251J of work on the surroundings. What is the final volume of the cylinder?

    asked on April 20, 2015
  81. chemistry

    Write a molecular equation for the gas-evolution reaction that occurs when you mix aqueous hydrobromic acid and aqueous potassium sulfide.

    asked on April 14, 2015
  82. Criminal Justice

    15. Which of the following is not an example of an ethical dilemma a defense attorney may face? A) the prosecutor's winning record. B) client perjury. C) defense receipt of physical evidence. D) a confession in confidence.

    asked on March 22, 2015
  83. physics

    A charge q1 is inside a spherical surface (although not necessarily at the exact center of the sphere). A second charge q2 sits just outside the surface. Choose whether the following statements are true or false. T/F The total electric flux through the

    asked on March 6, 2015
  84. Statistics

    smith is a weld inspector at a shipyard. he knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completed that shift, would it be unusual for

    asked on December 1, 2013
  85. Statistics

    Most people are definitely dominant on one side of their body - either right or left. For some sports being able to use both sides is an advantage, such as batting in baseball or softball. In order to determine if there is a difference in strength between

    asked on November 20, 2013
  86. Physics

    You stick a paper onto a fridge with a magnet. There are two free body diagrams, one for the paper and one for the magnet. What are the forces acting on each object, which way do they point?

    asked on November 3, 2013
  87. Calculus, please check my answers!

    1. Evaluate: lim x->infinity(x^4-7x+9)/(4+5x+x^3) 0 1/4 1 4 ***The limit does not exist. 2. Evaluate: lim x->infinity (2^x+x^3)/(x^2+3^x) 0 1 3/2 ***2/3 The limit does not exist. 3. lim x->0 (x^3-7x+9)/(4^x+x^3) 0 1/4 1 ***9 The limit does not exist. 4.For

    asked on October 7, 2013
  88. Calculus help, please! :)

    Consider the table of data for the function g(x),below: x: 2.9, 2.99, 2.999, 3.01, 3.1 g(x):4.41, 4.9401, 4.994, -5.006, -5.0601, -5.61 From the data given, it would appear that the lim g(x) x->3 is likely to be:

    asked on October 6, 2013
  89. english

    Combine the sentences by changing the italicized word group to an infinitive or infinitive phrase. Then write the complete sentence in the paragraph box. The journalist took a job in the hotel. This way he would get facts for an article. I got it wrong. I

    asked on June 3, 2013
  90. chem

    Which member in each pair has the stronger intermolecular dispersion forces? CH3CH2CH2I or CH3CH2I or neither? how do you know this

    asked on January 9, 2013
  91. ece

    1.wich of the following dramatic play behaviors are most typical for a 2-year old child? a.uses realistic props,and repeats routines over and over. b.prefers exciting and danger-packed themesfor play. c.plays in groups of one gender, with lots of dialogue.

    asked on December 11, 2012
  92. psychology

    One common mistake made in a persuasive paper is taking one side to the extent that the writing becomes biased. How does a persuasive essay differ from a biased essay?

    asked on October 9, 2011
  93. Physics

    A penny farthing is a bicylce that was popular between 1870 and 1890. As the drawing shows, this type of bicycle has a large front wheel (R=1.20m) and a smaller rear wheel (r=.34m). A bicyclist, riding at a linear velocity of 12.5 m/s, applies the brake

    asked on June 2, 2011
  94. Chemistry (really need quick help)

    Balance the following equations. (Use the lowest possible coefficients. These may be zero.) (a) As(s) + ClO3-(aq) ---> H3AsO3(aq) + HClO(aq) (acidic solution) I am using half-reactions but I don't really get this at all. Can someone explain?

    asked on May 5, 2011
  95. psychology

    • If each gender has an advantage based on its brain pattern, how can social scientists say that these differences create a disadvantage for females? (Think about the highest paying and highest prestige career fields and what skills are necessary for

    asked on December 18, 2010
  96. science

    how do you write the chemical equation for liquid pentanol (C5H12O) and gaseous oxygen ? Thanks ~Samantha~

    asked on November 29, 2010
  97. Math

    I'm really struggling with how to set this up: A company has 18 members on its management team,10 men and 8 women. There is a conference in Hawaii, and the company decided to send 5 people. If the selection of five people is random, find the following

    asked on November 4, 2010
  98. Math

    When you add a positive integer and a negative integer, you sometimes get a negative result and sometimes get a positive result. Is the same true when you multiply a positive integer and a negative integer?

    asked on April 5, 2009
  99. Science

    I grew in a cave, but i'm not alive. i began as water and minerals, but now i am solid. i grow upwards, but i never see the sky. What am i?

    asked on September 23, 2008
  100. Genetics

    Both Mrs. Smith and Mrs. Jones had babies the same day in the same hospital. Mrs. Smith took home a baby girl, whom she named Shirley. Mrs. Jones took home a baby girl, whom she named Jane. Mrs. Jones began to suspect, however, that her child had been

    asked on May 8, 2019

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