1. Chemistry

    You have 1liter buffer solution containing 0.1 M HF and 0.05 M NaF. Now you add 0.055 moles of HCl to it. A) Do you think that the solution still retains it's effectiveness? B) Explain rationally how you came to the conclusion. I do not think that the

    asked by Anna on April 16, 2013
  2. Chemistry

    A 16.6 mL portion of an HBr solution of unknown strength is diluted to exactly 247 mL. If 102.1 mL of this diluted solution requires 87.8 mL of 0.37 M NaOH to achieve complete neutralization, what was the strength of the original HBr solution?

    asked by Sam on May 1, 2011
  3. Chemistry

    Calculate the osmotic pressure of this solution. 18..6 grams of solute with molecular mass of 8940 grams are dissolved in enough water to make 1.00 dm3 of solution at 25 celsius. What is the osmotic pressure of the solution?

    asked by Jose Reyes on November 22, 2010
  4. Chemistry

    A solution is prepared by placing 72.8 g of calcium chloride in 120 g of water at 22C. The vapor pressure of water at 22C is 2.6 kPa. a)What is the boiling point of the solution? b)What is the freezing point of the solution?

    asked by haley on September 16, 2009
  5. Chemistry

    During a titration experiment, a 150.0 mL solution of 0.05 M sulfuric acid (H2SO4) is neutralized by 300.0 mL solution with an unknown concentration of sodium hydroxide (NaOH). What is the concentration of the sodium hydroxide solution?

    asked by Summer on March 24, 2018
  6. Calculus

    Which of the following integrals cannot be integrated using partial fractions using linear factors with real coefficients? a) integral of (x^2-1)/(x^3+x) dx b) integral of 1/(9x^2-4) dx c) integral of (x^3-x+3)/(x^2+x-2) dx d) All of these can be

    asked by Alice pleaseeeeee on March 16, 2019
  7. CHEM HELP

    what is the theoretical mole ratio- NaCl to NaHCO3 How do you determine the percentage error of an experimental mole ratio It would be easier for us to help you if we had the entire problem instead of just parts of it. However, from the standpoint of Na,

    asked by CHEMISTRY HELP on January 2, 2007
  8. chemistry

    A 10.0 mL sample of 3.00 M KOH(aq) is transferred to a 250.0 ml volumetric flask and diluted to the mark. It was found that 38.5 ml of this diluted solution was needed to react the stoichimetric point in a titration of 10.0 mL of a phosphoric acid, H3PO4,

    asked by dan on June 20, 2009
  9. Algebra 1

    A lab technician has a 15 percent alcohol solution and a 35 percent alcohol solution. She wants to make 100 gallons of a 29 percent alcohol solution. How much of the 15 percent solution should she use?

    asked by Eric on January 2, 2011
  10. Algebra

    a chemist mixed a 15% glucose solution with a 35% glucose solution. This mixture produed 35 liters of 19% glucose solution. How many liters of each solution did the chemist use in the misture?

    asked by Mike on January 27, 2010
  11. algebra

    A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 105 mL of 60% sugar solution for an experiment ?

    asked by Sandra on January 17, 2014
  12. Chemistry

    A solution is prepared by adding 45.0g of Na2SO4*6H2O to pure water to make 150mL of solution. What are molar concentrations of these ions in the resulting solution? Sodium Ion? Sulfate Ion? Phosphate Ion? I've determined the solution is 1.2M

    asked by Kevin on March 4, 2016
  13. math,algebra

    Can someone help me set this up to solve or what should i do because i have no clue. thanks. Some scientists believe there is a limit to how long humans can live.* One supporting argument is that during the last century, life expectancy from age 65 has

    asked by mathstudent05 on May 25, 2007
  14. Chemistry

    Balance each of the following skeletal equations by using oxidation and reduction half reactions. All the reactions take place in acidic solution. Identify the oxidizing agent and reducing agent in each reaction. (Use the lowest possible coefficients.

    asked by Sara on June 21, 2013
  15. math

    Number of apartments rented The manager of an 80 unit apartment complex knows from experience that at a rent of £¤300 per unit, all the units will be full.On thw average, an additional unit will remain wacant for each £¤20 increase in rent over

    asked by john on April 11, 2014
  16. Chem

    Write a balanced equation for the following reduction-oxidation reaction. SO3–2 + MnO4–SO42– + Mn2+ __SO32–(aq) + ___MnO4–(aq) + ___H+(aq)--> ___SO42–(aq) + ___Mn2+(aq) + ___H2O(l) I have no idea how to do this type of problem, care to explain?

    asked by Ed on January 10, 2010
  17. Chemistry

    Potassium permanganate reacts with sulfuric acid as per the equation shown below. Indicate the amount of excess reactant after the reaction of 7.24g KMnO4 and 10.32g H2SO4? 4KMnO4+6H2SO4 = 2K2SO4 +4MnSO4 +6H2O + 5O2

    asked by Missy on September 14, 2010
  18. Chemistry

    If you wanted to prepare 50.0 mL of hydrogen, collected over water at 25 C on a day when the barometric pressure was 730 torr, what mass of aluminum would you react with a hydrochloric acid? (Balance the equation first.)

    asked by Kate on April 8, 2013
  19. chemistry

    what is the balanced net ionic equation of dilute nitric acid with solid aluminum oxide? See my answer to ryan below. It is on page two and was entry #21 at the time I made this post but it will be lower the longer you take to read this response.

    asked by mary on September 21, 2006
  20. Chemistry 1

    What is the chemical equation, name, and formula for the follwing? "When strongly heated, magnesium sulfide formed a yellow crystalline deposit on the walls of a sealed reaction vessel. Metallic deposits were found on the bottom of the container"

    asked by Christy on April 29, 2008
  21. physics

    In 1989, Carl Lewis established a world record when he ran the 100. meter dash in 9.92 seconds. What was his average speed (in m/s) for the race? Remember to include your data, equation, and work when solving this problem

    asked by Anonymous on August 24, 2010
  22. Organic Chem

    1. what is the monomeric unit of a chain of molecules joined by peptide bonds? Is the answer glycine? 2. Write the equation for the addition of hydrochloric acid to ethene. What is the name of the product formed? C2H4 + HCl -------> ??? Any help with any

    asked by John on January 26, 2011
  23. chemistry 1 help please!

    Write a chemical equation that shows how acid rain H2SO3 was produced from SO2 gas and water in a zip sealed bag? My chem. teacher never explained how to do this and I have several other questions on this type of subject. If you could help me out it would

    asked by Jess on April 9, 2013
  24. Chemistry

    When a student plotted ln [vapor pressure of a gas] vs. inverse Kelvin temperature, she obtained a straight line with a slope equal to -20000 K. According to the Clausius Clapeyron equation, change in Hvap is _____ kJ/mol.

    asked by Linda on April 23, 2009
  25. math

    a student budgets $25 for his cellphone each month. he pays $10 for the service and $0.05 per minute.he knows that his budget can be off by $5 in either direction. What is the maximum and minimum number of minutes? Write an absolute value equation

    asked by Munna on April 6, 2016
  26. electronics

    definition, kinds/types, illustration, equation, tables/graphs of: a) diodes b)capacitors c) conductors, semiconductors, insulators d)transistors e) integrated circuit f) logic gates I will be happy to critique your work on this. I am not about to do it

    asked by Danielle Stacey on February 25, 2007
  27. Chem 1

    Write a chemical equation that shows how acid rain H2SO3 was produced from SO2 gas and water in a zip sealed bag? My chem. teacher never explained how to do this and I have several other questions on this type of subject. If you could help me out it would

    asked by Jess on April 9, 2013
  28. Physics

    What is the thinnest film of a coating with n=1.42 on glass n=1.52 for which destructive interference of the red component (650 nm) of an incident white light beam in air can take place by reflection? I am confused on the n's and I have no idea what

    asked by J on April 21, 2008
  29. conics

    The graph of y=x^2 is reflected in the x-axis, then stretched vertically by a factor of 2, and then translated 3 units to the left and 1 unit down. I need to write the equation of this parabola in standard and general form. I have 4 other questions so

    asked by Sandy on March 15, 2010
  30. Chemistry

    Calculate the molarity of an aqueous NaOH soultion if 32.00ml of it is required to titrate. 0.6789 g of oxalic acid to phenolphthalein end point. The balanced chemical equation is H2C2O4 + 2NaOH-> Na2C2O4 + 2H2O

    asked by Sonya on December 6, 2010
  31. Chemistry

    1.) what mass of zinc is needed to completely react with 4.00 g of silver nitrate? 2.) If excess ammonium sulfate reacts with 22.5 g of calcium hydroxide according to the following unbalanced chemical equation: (NH4)2 SO4 + Ca (OH)2 → CaSO4 + NH3 + H2O

    asked by Sam on February 17, 2016
  32. Math

    I have a problem..... -4(2x-3)=-8x+5 I understand first you distribute the -4 so you would have -8x+12=-8x+5 Then if you try and move x over to either side you completley get rid of x.... am I missing something or is this problem not solvable? Thank you I

    asked by russell on March 29, 2007
  33. chemistry

    Glutamate (Glu–) is the conjugate base form of glutamic acid (HGlu). The Ka of glutamic acid is 5.012 x 10^–5. You titrate 50 mL of 0.10 M sodium glutamate solution with 0.05 M HCl solution. Calculate the pH of the solution at the equivalence point.

    asked by kellie on July 28, 2012
  34. Chemistry

    i. Which of the following solutions has the lowest pH (more acidic). Explain you answers. a. a 0.1 M solution of a strong acid or a 0.1 M solution of a weak acid. b. a 0.1 M solution of an acid with Ka=2×10-3 or one with Ka=8×10-6 c. a 0.1 M solutions of

    asked by m on April 6, 2013
  35. Chemistry

    A solution contains the following ions: Hg2(2+) and Fe(2+). When potassium chloride is added to the solution, a precipitate forms. The precipitate is filtered off and potassium sulfate is added to the remaining solution, producing no precipitate. When

    asked by June on October 1, 2010
  36. Chemistry

    i. Which of the following solutions has the lowest pH (more acidic). Explain you answers. a. a 0.1 M solution of a strong acid or a 0.1 M solution of a weak acid. b. a 0.1 M solution of an acid with Ka=2×10-3 or one with Ka=8×10-6 c. a 0.1 M solutions of

    asked by m on April 7, 2013
  37. Chemistry

    i. Which of the following solutions has the lowest pH (more acidic). Explain you answers. a. a 0.1 M solution of a strong acid or a 0.1 M solution of a weak acid. b. a 0.1 M solution of an acid with Ka=2×10-3 or one with Ka=8×10-6 c. a 0.1 M solutions of

    asked by m on April 6, 2013
  38. chemistry help

    In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after

    asked by jk on April 1, 2015
  39. chemistry

    In the following questions, assume that no excess distilled water was added from a wash bottle during the titration of 10.00 mL of vinegar with your standardized solution of NaOH. A. calculate the pH of vinegar. B. what was the pH of the solution after

    asked by jk on April 1, 2015
  40. college

    What will the following pseudocode program display? Module main( ) Declare Integer x = 1 Declare Real y = 3.4 Display x, " ", y Call changeUs(x, y) Display x, " ", y End Module Module changeUs(Integer a, Real b) { Set a = 0 Set b = 0 Display a, " ", b }

    asked by timi on November 1, 2009
  41. Algebra

    The difference between twice a number and a number that is 5 more than 3. Write an equation that could be used to find the value of the number n, and explain how you arrived at.at your choice

    asked by Shane on October 16, 2016
  42. Geometry

    Write and equation of the line described A) the line parallel to y = 1\3x +5 and with a y-intercept of 1 B) the line perpendicular to y=-2x+4 and that passes though the point (-1,2)

    asked by Anonymous on March 18, 2010
  43. algebra

    find the variation constate and an equation of variation where y varies inversely as x and y=1 whenx=6 what is the variation constant is

    asked by karon on December 15, 2011
  44. math...help please!

    I need help figuring this out please! :) Write an equation for this sequence and find the 15th term. Term Number 1 2 3 4 Term 0 1 2 3

    asked by Rebekka on October 2, 2007
  45. Calculus

    Find an equation of the line that is tangent to the graph of f and parallel to the given line. Funtion: f(x)=1/sqrt(x-1) Line: x+2y+7=0

    asked by Liz on June 30, 2012
  46. math

    p varies directly as q and the square of r and inversely as s write the equation of the relation find k if p=40 q=5 r=4 s=6 find p when q=8 r=6 and s=9 find s when p=10 q=5 r=2

    asked by cate martinez on September 13, 2016
  47. algebra

    I need to know if I am doing this problem right when sustitution method. y+2x=3 y+2x=-4 y+2x=3 -1(y+2x=3)-y-2x=-4 now add the two equation y-2x=3 -y-2x-4 the answer would be -4y=7 then divided -4=7 answer 1.75 I no that there is more to this answer I am

    asked by Donna on February 15, 2011
  48. Algebra

    Given the roots, 1/2 and 4, find: (A) The quadratic equation 2x^2-9x+4 ? (B) The sum of the roots 4 1/2, or 9/2 (C) The product of the roots 2 Are these answers correct?

    asked by A. on November 9, 2009
  49. Trig help

    What values for theta(0

    asked by Kirky on May 20, 2014
  50. MATH

    EQUATION: (NOTE: THIS IS A FRACTION) 5-(-2^3)(2)/6xsqrt9 -9x2 MY ANSWER: = 5-(-8)(2)/6x3-9x2 = 5+8(2)/18-9x2 = 5+16/18-18 = 21/0 = undefined

    asked by Shae on February 25, 2016
  51. college chemistry

    Which of the following terms would be in the product(s) for the correctly balanced equation if the equilibrium expression is: [CO2]2/[CO]2[O2] a. O2 b. 2 CO2 c. CO2 d. 2 CO

    asked by barbra on November 4, 2010
  52. Math

    Translate and simplify "six less than twice the sum Of a number and three. I was not sure how to set it up Is it 2(x+3)-6 Or would it be set up 2x+3-6 I can solve it once I know how to set up the equation. Confused. Thanks for your help

    asked by Em on January 20, 2013
  53. intermidate algebra

    Solve each equadratic equation by factoring. 6^2-13x-28 36-13x-28 -13x=-36+28 x=64/13 check this, correct if wrong

    asked by Angelia on May 17, 2010
  54. maths

    Given that the equation of the circle is x^2+y^2+2x-8y+5=0 (i)find the centre and radius of the circle (ii)Determine whether the line x-3y=8 is tangent to the given circle

    asked by tembo on March 14, 2012
  55. algebra

    im trying to solve a literal equation, then solve the specific question first part is stumping me, im to solve for X ax=bx-c this is what I got ax-bx=c, but don't know how to get x by itself

    asked by aaron on September 3, 2013
  56. Math

    Are all linear equations functions. I'd say yes. Because both contain domain and range. But..not all are graphed linear. when is a linear equation not a function?

    asked by James on February 18, 2008
  57. math urgent urgent urgent

    x+2y=12 find intercept a circle equation x^2+y^2+4x-4y-1=0 and graph 2)find domain and range f(x)=x^2-4x-5 find vertex of f(x) =x^2+4x-21

    asked by zach w on December 1, 2012
  58. maths

    Given that the equation of the circle is x^2 + y^2 +2x -8y+5 =0 (i)Find the centre and radius of the circle (ii)Determine whether the line x-3y=8 is tangent to the given circle

    asked by mazoe on February 27, 2012
  59. precalculus

    solve logarithmic equation in exact form only. show work. log_5(x-3)+ log_5(x-6)-log_5(x+1)=2

    asked by Sara on January 15, 2012
  60. Math

    Use Newton's method to approximate a root of the equation 5sin(x)=x as follows. Let x1=2 be the initial approximation. The second approximation x2 is: and the third approximation x3 is:

    asked by Blair on July 19, 2008
  61. Calculus

    Determine the equation of the line through the origin and the point P(10,3) a) r=s(10,3), seR b) x=3t, y=10t, teR c) r=s(-3,10), seR d) r=s(3,10), seR

    asked by Antia on April 14, 2012
  62. Algebra

    I have 6 bags with the same number of cookies. Altogether I have 36 cookies.The equation to find out how many cookies are in each bag is 4*c=36. Why is this wrong?

    asked by Sierra on April 25, 2016
  63. Physical Science 9

    What is the chemical equation for the rusting of iron carbide. I tried it myself,but I ended up with iron hydroxide rather than iron oxide. Help, Please, and thank you.

    asked by Pierce on January 24, 2014
  64. calculus

    Use Newton's method to approximate a root of the equation 3sin(x)=x as follows. Let x1=1 be the initial approximation. The second approximation x2 is and the third approximation x3 is

    asked by kwack on September 7, 2010
  65. Algebra II

    The sum of the reciprocals of two consecutive positive integers is 17/12. Write an equation that can be used to find the two integers. What are the integers?

    asked by Denise on May 25, 2016
  66. Algebra

    The equation of a mirror in a particular telescope is y= (x^2)/(520), where x is the radius (in cm). If the mirror has a diameter of 32 centimeters, what is the depth of the mirror?

    asked by Calisha on May 25, 2011
  67. Math

    How do I set up the equation for A apineapple cost $5.04 together one one banana and one pineapple cost the same as 13 bannas What does one bannan cost?

    asked by DR. Gisler on September 21, 2015
  68. Math

    Can someone help me with this problem? Find the equation of the tangent line to the curve: f(x)=x^2, a. Parallel to the line y = 8x + 2 b. Perpendicular to the line y = 8x + 2

    asked by Branden on October 28, 2011
  69. algebra

    How would you solve polynomial equation for, a to the 8th power minus a to the 2nd power and b to the 6th power?

    asked by Amy on March 17, 2014
  70. precalculus

    Which of the following would be the best first step when solving the following system using the substitution method? • x - y = -4 ; • x + 2y = 5 x = -4 - y x = -4 + y 2y = 5 - x 2y = 5 + x I have solved the equation but I am unsure which is the best

    asked by Anonymous on November 28, 2016
  71. MATH

    When x is 0 for the equation y=10/x, y is obviously 0. How can i explain why this happens in words? and i know that division is finding how many times one number is contained in another. Is it 10 goes into 0, 0 times or 0 goes into 10, 10 times?

    asked by Marianne on August 23, 2010
  72. algebra

    I need to know if I am doing this problem right when sustitution method. y+2x=3 y+2x=-4 y+2x=3 -1(y+2x=3)-y-2x=-4 now add the two equation y-2x=3 -y-2x-4 the answer would be -4y=7 then divided -4=7 answer 1.75 I no that there is more to this answer I am

    asked by Donna on February 15, 2011
  73. trig

    What are the values of theta in the interval 0 less than or equal to theta is less than 360 that sastify the equation sin theta - 1/2 =0?

    asked by aziza on January 25, 2011
  74. Pre-ap 7th grade math

    Beads for sale: 12cents for 15. Write an equation relating the cost (c) and the number of beads (n) for the beads.

    asked by Ken on May 5, 2010
  75. maths

    find the equation to the straight line which passes through the point of intersection of the line 3x+4y-1=0 and 5x+8y-3=0 and is perpendicular to the line 4x-2y+3=0

    asked by Anonymous on January 10, 2013
  76. Chem

    Consider the following generic equation: 3A + B ---> 2C + D 2.0 mol A and 1.0 mol B react to form 1.0 mol C. What is the percent yield of this reaction? Please help! thanks!

    asked by Tyler on January 22, 2017
  77. Chemistry

    mass-mass conversions and mass-mole conversions: what is the difference and how do you do each? mass is converted to mols by mols = grams/molar mass. mass of one chemical is converted to mass of another chemical by using the coefficients in the balanced

    asked by Briana on January 18, 2007
  78. Math

    Use Newtons Method to find 13^(1/4) correct to four decimal places. I know the formula X_(n+1)= X_n - [f(X_n)]/[f'(X_n)]. I am not sure how to go on from there. I made the equation into y=X^(1/4), but I can't seem to figure out how to go on. Please help?

    asked by Betty on February 5, 2016
  79. Chemistry

    At 20 degrees celsius ,if the equation is C7H6O3(s)+C4H6O3(l)=C9H8O4+HC2H3O2(l), then how many liters of acetic acid, HC2H3O2 , would be formed if the density of HC2H3O2 is 1.05 g/ml?

    asked by Rene' on February 6, 2012
  80. Geometry

    I need to find the perimeter of square that has a semicircle (located inside of the square) with a radius of 10 in and it appears that the square is 10 inches as well. I tried the equation 1/2*3.14*10= 15.7, 10 + 15.7 = 25.7 but I don't think it is correct

    asked by Mary on April 9, 2008
  81. Math (pt 2)

    Sorry! I posted only the beginning of this question before. Here's the whole thing. Write an equation to express y in terms of x. X 1 __(blank) 3 4 5 Y 7 12 17 22 __(blank) y = ________(blank) I don't understand this one. Can someone please help????

    asked by 0livia on April 10, 2018
  82. precalculus

    can you check my work? Find a polar equation of an ellipse with its focus at the pole an eccentricity of e=1/4 and directrix at y=4. answer: √(x^2 + y^2) / (y - 4) = 1/4 4√(x^2 + y^2) = y - 4 4r = r sin θ - 4 (sin θ - 4) r = 4 r = 4/(sin θ - 4)

    asked by Anonymous on December 13, 2016
  83. geometry

    I need to find the perimeter of square that has a semicircle (located inside of the square) with a radius of 10 in and it appears that the square is 10 inches as well. I tried the equation 1/2*3.14*10= 15.7, but I don't think it is correct please help!!

    asked by Mary on April 8, 2008
  84. Chemistry

    For the balanced equation shown below, if 40.1 grams of C2H3O2Br were reacted with 8.01 grams of O2, how many grams of H2O would be produced? 2C2H3O2Br+O2->4CO+2H2O+2HBr Thank you!

    asked by Lelu on March 3, 2011
  85. chemistry

    The enthalpy of combustion of carbon to carbon dioxide is -394 kJ according to the equation: C (s) + O2 (g) --> CO2 (g) How many kJ of heat are released when 24.0 g of carbon are burned in an excess of oxygen

    asked by lo on June 11, 2011
  86. Math

    Whoever can help with a question I posted earlier. I am very sorry; I put the wrong variable in the question. Question is to solve for y and not "x" as my previous message and the equation is: x = 3(r + ty) So sorry for the confusion. Please help at your

    asked by Cassandra on April 18, 2015
  87. Cosmology

    A curvature constant of k=0, as used in the Friedmann equation, means: * The universe is open * The universe is matter-dominated * There is no dark energy * The universe is flat

    asked by qwerty on January 16, 2013
  88. physics

    Can I still use the equation that I generated from my curve when doing the experiment even if the number I want to calculate is bigger than the last point in my curve ( ps the curve is a best fit line) would my answer be accurate??

    asked by balu on June 14, 2016
  89. Math

    Admission to the country fair cost $9per person the ride tickets cost $2.50 each. Write an equation representing total cost

    asked by Daisy on September 26, 2017
  90. Calculus Help Please

    Consider the implicit function ln(xy)-cos^-1(x-1)=x a. Find dy/dx. b. Find y when x = 1. c. Find the equation of the tangent line in slope-intercept form when x = 1. Show steps please! Thanks!

    asked by Tenshi on April 8, 2014
  91. calculus

    Given the curve defined by the equation y=cos^2(x) + sqrt(2)* sin(x) with domain (0,pi) , find all points on the curve where the tangent line to the curve is horizontal

    asked by Ashok on March 1, 2012
  92. Physics

    If the emf of a battery is 23 V and a current of 66 A is measured when the battery is shorted, what is the internal resistance of the battery? Answer in units of Ω How would you set up the equation to solve?

    asked by Tiffany on March 4, 2013
  93. Chemistry

    For the balanced equation shown below, if 40.1 grams of C2H3O2Br were reacted with 8.01 grams of O2, how many grams of H2O would be produced? 2C2H3O2Br+O2->4CO+2H2O+2HBr Thank you!

    asked by Lelu on March 3, 2011
  94. math

    Can u please make an equation for this? : the club members need 686 cm of denim for rag dolls. They need 438 cm of denim for bean bags. How much denim is needed in all?

    asked by lexi on May 11, 2014
  95. Algebra 1

    c. multiplying x/6-5/8=4 by 6 did not eliminate all the fractions/ What could you have multiplied to get rid of all the fractions? Explain how you got your answer and write the equivelent equation that has no fractions. HELP ME PLEASE!!!!!!! I don't

    asked by Kelsie on May 11, 2009
  96. pre cal

    find the standard form of the equation of the ellipse with center (0,0) and foci at (+- 4square root 3, 0) and verticies (+-8,0) x^2/a^2 + =y^2/b^2 = 1 a = 8 b = sqrt(8^2 - (4sqrt3)^2) ..= sqrt(64 - 48) = sqrt(16) = 4 Thus, x^2/64 + y^2/16 = 1

    asked by jessica on May 25, 2007
  97. Chemistry

    Fe3O4 reacts with CO according to the equation Fe3O4 + 4CO => 4CO2 + 3Fe If 478.9 g Fe3O4 is reacted with excess CO, what mass of CO2 will be produced?

    asked by Anonymous on July 9, 2013
  98. algebra

    A jet flies with the wind at 1100 km/hr and 750 km/hr against the same wind. Find the rate of the wind and the speed of the plane show the equation for solving

    asked by denice on May 27, 2012
  99. MAT-134 Math XL

    Graph the following linear equation using one of the following methods: 1st slope intercept form y = mx + b 2nd table of values 3rd x-intercept and y-intercept 1. 3x + 4y = 12

    asked by Billy on February 13, 2014
  100. Calculus

    How do you us implicit differentiation to solve x( y + 2 )^5 = 8 x( y + 2 )^5 = 8 ( y + 2 )^5 d/dx (x) + x d/dx(y+2)^5=d/dx 8 (y+2)^5 + 5x(y+2)^4 dy/dx=0 solve for dx/dy (Broken Link Removed) I assume you want dy/dx. Differentiate both sides of the

    asked by Patti on April 10, 2007

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