1. math

    p(x) = X squared – 2x + 4 Find the domain of the function the answer I got was x/x is a real number and x =0 Help me Please

    asked by janay1978 on June 9, 2009
  2. Trig

    Find the distance from pi. 7 pi/6. I subtracted 2 pi from this and got -5pi/6. But the correct answer is pi/6. Whwere did this come from?

    asked by Victoria on December 8, 2009
  3. Math

    find the quotient: 1,754/12 a 1733 b 21 11/83 c 83 11/21 d 1775 Would C be the correct answer?

    asked by Steve on April 8, 2015
  4. 5th

    find the missing number: 18,20,20,24,27,27,____,30,33,34,36,36,_ I need you to show me this answer cause, i got stuck with this one. thank you!

    asked by pat on September 30, 2010
  5. Calculus

    Find the derivative for k(x) = (5x4 + 2)(3sin x). Would this be the answer: (60sinx)x^3+ (15cosx)x^5+ 2

    asked by Veronica on July 23, 2008
  6. TRIG

    find: sin 23pi/12 i got totally the wrong answer how do i approach this?

    asked by Carry on March 2, 2009
  7. algebra/math

    use the FOIL method to perform the multiplication. (x^1/2-2)(x^1/2+4) I can not seem to find the answer to this problem. Can anyone help? Thank You!

    asked by Ashley on September 26, 2008
  8. geometry

    find the area of a square if each side measures 10 cm. my answer is 100 cm

    asked by K on August 16, 2008
  9. maths, variations

    question: if y is proportional to x, and that y=6 when x=12, (A)express y in terms of x, (B)and find to value of x when y=12. answer: (A) x=y/3 (B) x=4 is what i did correct? i would appreciate your help!

    asked by hayley on December 18, 2007
  10. 3 grade math

    write to explain- when you divide 24 by 6, what fraction of 24 are you finding? find the answer.

    asked by dw on January 30, 2012
  11. MaTh

    Find the sum of all positive integers less than 1000 ending in 3 or 7. What is the answer?

    asked by Speedo on September 2, 2013
  12. Math

    Find the slope of the line that goes through the given points. I think I figured out the answer but I would appreciate any feedback thanks! (3,-2),(-1,-6)

    asked by Jeff on February 24, 2009
  13. algebra

    Hello, can you help me find the slope for x=2-y ____ 9 its 2-y over 9 I thought the answer was 2 but my professor said that's wrong. thanks

    asked by denise on January 21, 2010
  14. math problem

    I have to find the area of a 14 yd square...the answer is the number plus the units squared

    asked by erin on July 13, 2012
  15. college math

    Find the measure of the missing angle a = 33o would the correct answer be 66

    asked by Lourane on June 2, 2012
  16. Geometry

    Find AB in simplest form if A(0,3) and B(2,7) AB=___________ *I need help on this last problem I have! Someone please walk me through and how to get the answer

    asked by Anonymous on September 11, 2014
  17. Calculus

    Find the work done by F(x,y,z)=(x^2y)i=(x-z)j+(xyz)k where c=(t)i+(t^2)j+(2)k, 0

    asked by Ashley on October 28, 2014
  18. College Algebra

    Find the difference quotient f(x+h)-f(x)/h, where h cannot be equal to 0 , for the function below. f(x)=1/x+9 Simplify your answer as much as possible.

    asked by Moses on February 1, 2017
  19. Algebra

    Find the slope of the line that goes through the given points. I think I figured out the answer but I would appreciate any feedback thanks! (3,-2),(-1,-6)

    asked by Mitch on February 24, 2009
  20. maths

    The line joining P(7,2) and Q(-2,3) cuts the x-axis at_____? Answer= (x,y) find x and y

    asked by hin chun on August 30, 2013
  21. L.ARTS

    nouns ending in ful for their _____ by adding s. I can not seem to find this answer.

    asked by BOBBY on December 30, 2007
  22. math or physics

    Find the distance from 0 to 3 of the ∫ l3t-5ldt. I don't understand how the answer is 41/6.

    asked by smith on September 22, 2018
  23. maths

    find the value of cos(60degress+45degress) leaving ur answer in surds

    asked by ezinne ogb on March 16, 2016
  24. please check

    5 x < - 25 can you check. 5x

    asked by Taylor on January 8, 2008
  25. math

    If a = 2^3 œ 3^7 œ 5^3œ 11^4 and b = 2^2 œ 3^5 œ 7^2 œ 11 œ 13, find the following. (Leave your answer written with exponents). (a) GCD (a, b) (b) LCM (a, b)

    asked by Mike on January 19, 2010
  26. Math

    Find the inverse function of f(x)=(x+4)/(2x-5) and then verify your result using: f(f^-1(x))=x and f^-1(f(x))=x. Please an answer fast

    asked by Shuki on May 12, 2016
  27. Math

    Find the value of "s": s = 1^2 - 2^2 + 3^2 - 4^2 + ... - (2006)^2 + (2007)^2 Answer: 2 015 028 Help me solve it, please?

    asked by Anonymous on November 28, 2007
  28. algebra

    Perform and give answer in simplified form Find the product (2x-5)^2

    asked by Marty on December 13, 2009
  29. Cal 1

    How do you find dy/dx by implicit differentiation? x^3 + y^5 = 1 Damon answer isn't right and I have no idea what he did. Somebody please help.

    asked by Anyomous on November 6, 2010
  30. math

    Explain how to find the sum 8 + (-10) using game chips, then give the answer.

    asked by chachis on August 16, 2011
  31. Math

    find relative max or min point of 1+x+x/x My answer was 1 but I am not sure this is correct.

    asked by Hannah on April 2, 2011
  32. Statistics

    Can someone help me with this question. I am so very confused. Find the y-intercept of the line whose equation is y=0.7x +6.2. could the answer be 5

    asked by mary ann on January 12, 2015
  33. Trigonometry

    Find the domain of the function. Write your answer using infinity and union. f(x)=x/x^2+1 f(x)=2x^2/x-3

    asked by Carrie on October 9, 2012
  34. math

    ______-3 3/8= 2 1/2. (what fraction subtract 3 3/8= 2 1/2?) Please help me find the answer that belongs in the blank.

    asked by Trelle on December 15, 2008
  35. Algebra 2

    Will someone please check if I am right???? find the second and third term of the arithmetic sequence -7, __,__,-22,-27... Options: -12,-15*** My Answer -17,-12 -10,-17 -12,-17

    asked by Ke$ha on March 31, 2016
  36. Math

    Find the circumference of the circle (2.5 cm). Round your answer to the nearest centimeter.

    asked by Latoya on April 6, 2016
  37. Math

    Can you please explain this to me. The problem is 7/16 - 3/20 First I have to find the common denominator which would be 80 How does the 7/16 become 35/80 (where does the 35 come from) How does the 3/20 become a 12/80 (Where does the 12 come from) 35/80

    asked by Liz on January 20, 2010
  38. math

    Find the product. Estimate to check that your answer if reasonable. 191 x 88

    asked by Ressie on October 21, 2011
  39. Algebra

    Trying to figure out how to find all numbers for which the rational expression is defined. 9/2z+5 Is the answer 0?

    asked by Cory on June 17, 2008
  40. algebra/math

    use the FOIL method to perform the multiplication. (x^1/2-2)(x^1/2+4) I can not seem to find the answer to this problem. Can anyone help? Thank You!

    asked by Ashley on September 26, 2008
  41. Government

    I can't seem to find the answer to this question and i need help: what were the main points of Virginia Plan?

    asked by J.S. on September 29, 2009
  42. COLLEGE CALCULUS. HELP!

    the fundamental theorem of calculus, f(x)=∫(0,x) t^3+2t^2+2dt, and find f"(x). my answer was: f'(x)=x^3+x^2+2 f"(x)=x^4/4 + 2x^3/3 + 2x it said its wrong.

    asked by lindsay on April 15, 2012
  43. calculus help

    find the position function s(t) given acceleration a(t)=3t, if v(2)=0, and s(2)=1. the answer is s(t)=(t^3/2)-6t +9 but I don't know how to solve this. Can someone help me with this? Thank you!

    asked by Anonymous on April 23, 2014
  44. Geometry

    Find the missing side. Approximate the answer to three decimal places when appropriate. A=15 yd C=25 yd? Help!

    asked by Susan on April 21, 2012
  45. college algebra

    Radical and Rational Exponent find roots square roots of 12a^3/25=6a^3 -3-square roots 18/-6=-1 this is my answer am I right. check this for me it find the roots of the problem

    asked by JohnJ on May 25, 2010
  46. Math for Educators

    Use Gauss's approach to find the following sums (do not use formulas). a. 1 + 2 + 3 + 4 +...+ 102 b. 1 + 3 + 5 + 7 +...+1001 a. The sum of the sequence is ? My answer 102-51(103)= 5,253 b. The sum of the sequence is? My answer 500.3(1,002)=501,300.6 Are my

    asked by Carol on June 4, 2013
  47. physics

    At car (1140-kg)traveling at 76.04 m/s and truck (12600-kg)traveling 6.88 m/s have a head-on collision and then stick together. What is their final common velocity (m/s)? (assume the car is going in the positive direction) What is the cars' change in

    asked by Casey on June 30, 2011
  48. Algebra class!

    You and your date go out for a fancy dinner. The bill comes to $105 and you want to leave a 15% tip. Without using a calculator, determine how much money you should leave for the tip. To find the answer I ……. Describe an alternate way to find the tip

    asked by Urgent! running out of time.... on February 18, 2013
  49. Algebra

    The Bradys and their maid, Alice, took a trip to Hawaii for their summer vacation. The travel agent told Ike that the trip would cost $210 for each child plus another $315 per adult. According to the credit card receipt the trip cost a total of $2205 for

    asked by April Preston on May 9, 2017
  50. Math

    Find the amount in an account if $2,000 is invested at 6.125%,compounded semi-annually,for 2 years. A)$2256.49 B)$2252.50 C)$2324.89 D)$544,757.84 Get yourself a pocket calculator or sharpen your pencil. The new amount will be 2000*(1.030625)^4 The

    asked by Sharai on March 14, 2007
  51. math

    Suppose that a market research company finds that at a price of p = $30, they would sell x = 36 tiles each month. If they lower the price to p = $15, then more people would purchase the tile, and they can expect to sell x = 41 tiles in a month’s time.

    asked by jean on July 31, 2011
  52. SCIENCE

    I need help. I cannot find an answer to this in my book. What would happen to a frog placed in seawater? What would happen to a sea cucumber put in fresh water? The concept here is osmosis. Bear in mind sea water is concentrated salt water. Then read the

    asked by Suzi on March 9, 2007
  53. Calculus

    Let 5x^2 - 3xy + 58 = 2y^3 Use implicit differentiation to find y' for the above equation. The first thing I did was move 2y^3 over to that everything is equal to 0. With the -3xy I used the product rule and expanded that. After solving I got.... 10x(3 * y

    asked by Nira on March 5, 2017
  54. math

    A telephone company's goal is to have no more than 4 monthly line failures on any 100 miles of line. The company currently experiences an average of 5 monthly line failures per 50 miles of line. Let x denote the number of monthly line failures per 100

    asked by k on February 11, 2012
  55. Physics

    A certain freely falling object, released from rest, requires 1.40 s to travel the last 20.5 m before it hits the ground. (a) Find the velocity of the object when it is 20.5 m above the ground. (Indicate the direction with the sign of your answer. Let the

    asked by Doug on September 4, 2018
  56. Math

    Find the monthly payment, needed to have a sinking fund accumulate the future value, $16,000. The yearly interest rate is 6.7% and the number of payments is 20. Interest is compounded monthly. Round your answer to the nearest cent. I do not understand how

    asked by Anonymous on April 21, 2017
  57. Maths - Cartesian Equations

    Find the corresponding Cartesian equation for each pair of parametric equations: x = t - (1/t) and y = 2*[t + (1/t)] The answer is y^2/16 - x^2/4 = 1 I have no idea where to begin. I tried squaring both equations in hope to easily remove t^2 but ended up

    asked by Jichu on December 27, 2016
  58. Math

    Hi, I am getting very frustrated. I am doing an online homework for chemistry and it's telling me to round to the nearest WHOLE number. So the answer I got was -1435.650.... And I typed in -1436. and said I was wrong and so I tried it again and typed 1.4 x

    asked by Anonymous on August 5, 2010
  59. Intermediate Algebra

    Please help with the below. I know the answer I need help figuring out how to get the answer I am obviously doing something wrong, because I come up with a different answer that what I am supposed to. Here it is: F(X)3Xsquared-5X+1 The correct answer is

    asked by BL on May 14, 2014
  60. Calculus 2

    A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 for g and 3.14 for π. If you enter your answer in scientific notation, round the decimal value to two decimal places. Use equivalent rounding if you do not

    asked by Liz on June 22, 2013
  61. mth174

    A tank is full of water. Find the work W required to pump the water out of the spout. (Use 9.8 for g and 3.14 for π. If you enter your answer in scientific notation, round the decimal value to two decimal places. Use equivalent rounding if you do not

    asked by Alex on February 7, 2012
  62. Math

    I can't remember how you find the roots of quadratic equations other than determining the zeroes of the equation and finding the x-intercepts. Can someone please give me a clear answer on this as my dad has been useless on this topic and I need help like

    asked by Alex on November 3, 2014
  63. math,correction

    Geometry. Find the perimeter of the given figure. tHE Figure is a rectangle.It has height (8)/(2x-5) and length (8)/(2x-5) My answer is: (2(x+8))/(2x-5) ------------------------------------ Add or subtract as indicated. Express your result in simplest

    asked by jas20 on March 2, 2007
  64. English

    Write the noun that is the simple subject. 1/ The red color of my sweater looks good with the bracelet. Answer: color. 2/ Some members of my family also enjoy stringing beads. Answer: family. 3/ This beaded necklace is one of my favorite pieces of jewelry.

    asked by Joj on October 10, 2015
  65. Calculus MATH

    Problem statement a) Suppose f(x) is defined on 0 ≤ x ≤ 1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales

    asked by JIN on November 30, 2016
  66. Pre-Calc/ Trig

    Find the sum of the three smallest positive values of theta such that 4(cos^2)(2theta-pi) =3. (Give your answer in radians.) LaTEX: Find the sum of the three smallest positive values of $\theta$ such that $4\cos^2(2\theta-\pi) =3$. (Give your answer in

    asked by Steve Ho on October 31, 2016
  67. More Rational Exponents!

    1. The optimal height h of the letters of a message printed on pavement is given by the formula . Here, h= (0.00252d^(9/4))/e d is the distance of the driver from the letters and e is the height of the driver’s eye above the pavement. All of the

    asked by Brady on February 15, 2014
  68. chemistry

    how much thermal energy is needed to raise 500.0g of H2O at 50.0*C to steam at 100.0*C? step by step solution and answer!!???!! answer? You have to be kidding. Are you taking a quiz and want to turn it in? Goodness. Find the heat in each of the following.

    asked by crystine cole on April 12, 2007
  69. calc

    a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use

    asked by Mark on December 1, 2009
  70. calc

    a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use

    asked by Mark on December 1, 2009
  71. math

    i need help with geometry semester b unit 7 lesson 10 surface area and volume unit test i need someone to check my anwsers and to tell what i did wrong 1) use euler's formula to find the missing number vertices 15 edges 24 faces? 9,10,11,12 My answer was

    asked by roseberlynn on May 23, 2018
  72. Literature

    4. At the end of Chapter II of The Call of the Wild, what's meant by the phrase "The domesticated generations fell from him"? A. Buck has lost a lot of hair in his fight with Spitz. B. Buck is learning to love a human being again. C. Buck is losing his

    asked by Vmarie on November 28, 2015
  73. Physics

    A copper wire with a criss section of 5 mm^2 and 2 km long has an effective resistance of 2Ohms. a) Find the power lost in this wire if 10000 W of power is put through it with 120 V of potential. [hint: use P=VI to get current first then P=I^2R] b) Express

    asked by Lana on December 27, 2008
  74. Physics

    In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 45 m/s (about 100 mi/h) in a time of 7.0 s. The combined mass of the car and riders is 5.5 × 103 kg. Find the average net force

    asked by Rash on September 27, 2018
  75. Day Care

    Children will develop a sense of self-direction and competence if materials are arrangeed so that children A. must apply ingenuity to find needed materials. b. must ask a caregiver for needed materials c. can easily find matereials themselves. d. will be

    asked by Cynthia on January 9, 2009
  76. Reading/Abnormal psychology

    Hello, I am reading the book Girl Interrupted and have to write a review on it, I know that the main person in the book had borderline personality, but I need to find how the treatment an or disorder affected the family, and I can't find the answer to that

    asked by Ashley on October 1, 2008
  77. Physics

    A 0.525 kg ball starts from rest and rolls down a hill with uniform acceleration, traveling 154 m during the second 10.0 s of its motion. How far did it roll during the first 4.00 of motion? I thought the answer was .2464 m, but it has been a couple of

    asked by Josh on September 12, 2006
  78. Chemistry

    I cannot find information that gives me a clear answer whether NaBr is an electrolyte or non electrolyte. I have found some information that K2SO4 is an electrolyte, but now I am doubting that. All of my others I have been able to find solid information

    asked by Larry on January 31, 2008
  79. algebra

    An airplane traveled from Boston to Las Vegas making a stop in St. Louis. The plane traveled 2410 miles altogether, which is 230% of the distance from Boston to St. Louis. Find the distance from Boston to St. Louis to the nearest mile. The answer is 1048

    asked by 1carriebear on August 28, 2011
  80. Physics (Rotational Kinetic Energy)

    Hello, The question is: A solid ball rolls along the floor with a constant linear speed v. Find the fraction of its total kinetic energy that is in the form of rotational kinetic energy about the center of the ball. Krot/Ktotal = ? The answer I keep

    asked by Ben on October 22, 2009
  81. Chemistry

    Here's a molar heat problem I just have one question on. How much heat will be transferred if 2 moles of hydrogen reacts with excess oxygen according to the reaction below? 2H2 + O2 yields 2H20 + 572 kJ The answer according to my answer key is 2 mole H2 x

    asked by Tabetha on May 18, 2009
  82. Physics

    A 6 kg rock is suspended by a massless string from one end of a 6m measuring stick. What is the mass of the measuring stick if it is balanced by a support force at the 1m mark? answer in units of kg. Thanks for any help Rather than just posting the

    asked by Stu on April 27, 2007
  83. Algebara

    How do you find the square root of 14 without a calculator? I know I need to use the square root of 9 which is 3 and the square roots of 16 which is 4. I know the answer is gonna be closer to 4 because 14 is closer to 16. I just can't figure how to get the

    asked by Dom on August 17, 2016
  84. AP Calculus

    Consider the curve given by x^2+4y^2=7+3xy a) Show that dy/dx=(3y-2x)/(8y-3x) b) Show that there is a point P with x-coordinate 3 at which the line tangent to the curve at P is horizontal. Find the y-coordinate of P. c) Find the value of d^2y/dx^2 (second

    asked by Leanna on January 26, 2011
  85. English- 5

    Directions: In each of the following sentences some part of the sentence or the entire sentence is underlined. Beneath each sentence you will find four ways of writing the underlined part. The first of these repeats the original, but the other three are

    asked by rose- Ms. sue on May 28, 2008
  86. math,correction

    Is this correct or no. I need help in a couple of problems can someone explain them to me. Problem#1 directions: Factor each expression a^2(b-c)-16b^2(b-c) My answer is: (b-c)(a-4b)(a+4b) PROBLEM#2 dIRECTIONS: Find a value for k so that 2x^3-kxy^2 will

    asked by jas20 on February 24, 2007
  87. Algebra 1

    11) Tell which real number corresponds to the situation. During a quiz, a person loses 1800 pts. answer: -1800 12) Solve for y z=yq Answer: z-q=y 13) Solve using the multiplication principle 10x=-90 Answer: x= -9 14) Collect like terms 20w+w+14/19w Answer:

    asked by deedee on November 5, 2008
  88. calculus

    Calculate the following integral: ∫ (square root(9x^2 - 16)) / x^2 I found: ∫ (square root((3x)^2 - (4)^2)) / x^2 x = a sec0 3x = 4 sec0 x = 4/3 sec0 dx = 4/3 sec0tan0 d0 4/3 ∫ [(square root(4sec0)^2 - 16)(sec0tan0 d0)] / x^2 I'm lost from here and

    asked by Paul on September 13, 2012
  89. CHEMISTRY (WEBWORK)

    SPARTAN: Use the information from question #1 to answer the following. A. Which two orbitals from CV+ and –OH will overlap creating the C-O bond in CVOH? ______ (Use i, ii, iv, etc. for your answer) B. Which of the following accurately shows the orbital

    asked by june on July 18, 2010
  90. College Physics

    Four masses are positioned at the corners of a rectangle, as indicated in the figure below (not to scale). x 1kg------2kg | | | |y 3kg------4kg (a)Find the MAGNITUDE and DIRECTION of the net force acting on the 2.0 kg mass if x = 0.20 m and y = 0.11 m.

    asked by Sara on December 11, 2010
  91. check

    #19, Inclusive Language-Quoting from Biased Material - The mayors and their wives were invited on a tour of the state buildings. Answer: The maors and their wives[sic] were invited on a tour of the state buildings. #8. Puctuation-colon - Studing is

    asked by marie on August 25, 2007
  92. Spanish

    I have to find the verbs in the preterite and the imperfect but I'm getting them marked wrong. 1. Mi amiga Anita siempre tenía dolor de cabeza cuando estudiaba. my answer: tenía; estudiaba 2. El diente me dolió todo el fin de semana pero el lunes el

    asked by B on March 29, 2011
  93. Linear algebra

    If →u and →v are the vectors below, find the vector →w whose tail is at the point halfway from the tip of →v to the tip of →v−→u and whose head is at the point halfway from the tip of →u to the tip of →u+→v. Assume all vectors are in

    asked by sal on September 22, 2018
  94. Calc

    Does 1/ln(x+1) converge or diverge? I've tried the nth term test, limit comparison test, and integral test. All I get is inconclusive. The other tests I have (geometric series, p-series, telescoping series, alternating series, and root tests) don't apply.

    asked by Mischa on March 22, 2007
  95. Differential equation

    A first order linear equation in the form y′+p(x)y=f(x) can be solved by finding an integrating factor μ(x)=exp(∫p(x)dx) (1) Given the equation (x+4)^2y′+5(x+4)y=16 find μ(x)= I found it to be e^(5ln(x+4))which is correct** (2) Then an explicit

    asked by Joe on June 15, 2015
  96. Math

    Please check double check me please. For the decimal 8.57932 What is the place value of 5? Ten Thousandths What is the place value of 2? Ones Write each of the following as a common fraction or mixed number 4.0171 Answer: 4 171/10,000 Arrange in order from

    asked by Allison on February 20, 2008
  97. Math

    How do you solve this? I have tryed so many times and can not get the right answer. (1.65-1.05)^2/0.4+0.8 The answer is suppose to be 1.7 but everytime I do the problem i don't get anything near that answer. Help would be greatly appreciated.

    asked by Sally on January 21, 2010
  98. calculus

    Could somebody please check these for me? Solve the differential equation with the given initial solution. 1. (dy/dx)=(-y/3) for y(0)=10 my answer was y=10e^(-x/3) 2. dP/dt=P+4 for P(0)=100 my answer was P=104(e^t)-4 3. dz/dt=te^z for z(0)=0 my answer was

    asked by tia on April 14, 2008
  99. calculus

    Could somebody please check these for me? Solve the differential equation with the given initial solution. 1. (dy/dx)=(-y/3) for y(0)=10 my answer was y=10e^(-x/3) 2. dP/dt=P+4 for P(0)=100 my answer was P=104(e^t)-4 3. dz/dt=te^z for z(0)=0 my answer was

    asked by tia on April 16, 2008
  100. math

    answer the following for the given quadratic function. f(x)=x^2+x^2-8 a. what is the vertex (h,k) of f? (h,k)=? simplify your answer and type the answer in an ordered pair b. what is the axis of symmetry?

    asked by Heather on January 1, 2013