Questions Asked on
May 6, 2015

  1. math

    find the slope of the following graphs. x -1,0,1,2 y 4,2,1,-2 a.1 over 2 b.2 c.-2* d.- 1 over 2 find the slope of the following graphs. x -2,2 y 5,1 a.3 over 2 b.1 c.-1* d.- 3 over 2 find the slope of the following graphs. x 0,3 y 0,2 a.2 over 3* b.3 over

  2. GEOMETRY

    I really need help on this... NA ≅ PA, MO Û NA, RO Û PA, MO = 7 feet what is PO? a.7 ft b.49 ft c.14 ft d.3.5 ft

  3. Please Answer my Question(Science)

    1. Which of the following statements about continental glacial movement is correct? Continental glaciers can only flow uphill Continental glaciers can flow in all directions. Continental glaciers can only flow downhill** Continental glaciers do not flow at

  4. Algebra Readiness

    Would a triangle with a vertical length of 6 and a horizontal length of 10 have the same slope as the blue and red triangles shown in the graph? A.) Yes, the slopes would be the same B.) No, the slope of the new triangle would be 2:4 C.) No, the slope of

  5. 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

  6. language arts

    which element is shared in both zoos joys or jails and why do we need zoos?

  7. College Chemistry

    Arrange the following compounds in the order of increasing Ksp: AgCl, AgBr, AgI. Explain your reasoning. I got AgI

  8. Chemistry

    A chemist needs to prepare a buffer solution of pH 8.80. What molarity of NH3 (pKb = 4.75) is required to produce the buffer solution if the (NH4)2SO4 in the solution is 1.8 M?

  9. chemistry

    Suppose you add 2.0 mL of 0.10 M HCl to 100 ml of buffer having 0.10 M HA and 0.20 M NaA. a. Which species will react strongly with one another? I believe the answer is Cl- and Na+ to form NaCl. b. What will be the change in pH? pKa = 4.82 I am not sure

  10. Stats

    At a certain university, the average cost of books was $370 per student last semester and the population standard deviation was $80. This semester a sample of 45 students revealed an average cost of books of $390 per student. The Dean of Students believes

  11. Math

    As part of a pancake recipe, you mix 3/4 cup of milk for every 1 cup of flour to make 7 cups of batter. How much of each ingredient do you use?

  12. Social Studies

    Read the passage and answer the question that follows: John Brown, supported by abolitionists and Republicans, tried to start a slave revolt. Therefore be it resolved that the defense of slavery is a common cause to all Southern states. At the call of any

  13. Calc 1

    Find f. f ''(x) = 6 + cos x, f(0) = −1, f(7π/2) = 0

  14. physics

    water is flowing at 3 m/s in a horizontal pipe under a pressure of 200 kpa. the pipe, which narrows to half its original diameter, is laid out on a level ground? a) what is the speed of flow in the narrow section? b) what is the pressure in the narrow

  15. chemistry

    true or false Entropy always tend to favor mixing Mixing result in positive change in entropy Entropy allows endothermic processes to be spontaneous Pure liquids don't have entropy Addition of salt to water increases entropy Entropy is the measure of

  16. finance math

    A single person earns a gross biweekly salary of $780 and claims 6 exemptions. What is the person's net pay? a. It is the same as the gross pay. b. It is $11 more than the gross pay. c. It is $11 less than the gross pay. d. It is $13 less than the gross

  17. Algebra

    Suppose you wish to make a scale drawing of your living room, which measures 18 ft by 23 ft. If the shorter side of the drawing is 6 in., how long is the longer side of the scale drawing?

  18. Fractions

    Paul's dad made a turkey pot pie for dinner on Wednesday. The family ate 4/8 of the pie. On Thursday, Paul ate 2/16 of pie for a snack. What fraction of the pie remains? Okay, so I added 4/8 and 2/16 and got 10/16. I would be able to complete the problem,

  19. Chemistry

    Zn + 2 HCl = H2 + ZnCl2 / When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 degrees Celsius and a pressure of 854 mmHg?

  20. algebra--1 question

    Suppose you divide a polynomial by a binomial. How do you know if the binomial is a factor of the polynomial? Create a sample problem that has a binomial which IS a factor of the polynomial being divided, and another problem that has a binomial which is

  21. chemistry

    Referring to the following reaction: Pb(NO3)2 (aq) + Na2SO4 (aq) -->PbSO4 (s) + 2NaNO3 (aq) A solution of 0.114 M Pb(NO3)2 with a volume 10.6 mL is added to 12.4 mL of a solution of 0.105 M Na2SO4. Calculate the number of grams of PbSO4 that will form. I

  22. Math

    What is the exact value of sin(-15 degrees)?

  23. Trig

    Find each value if sin A = 12/13 with 90 degrees

  24. precalculus

    hyperbola with vertices at (0,+/-2), and asymptotes y=+- 1/2x

  25. chemistry

    Calculate the concentration of all species in a 0.130M solution of H2CO3 Enter your answers numerically separated by commas. Express your answer using two significant figures. [H2CO3], [HCO?3], [CO2?3], [H3O+], [OH?] =

  26. Chemistry

    the equilibrium constant Kc for the reaction H2 + Co2 to H2O + CO is 4.2 t 1650°C initially .80 mol of H2 and 0.8 mol Co2 are injected into a 5.0 flask. Calculate the concentration of each species at equilibrium

  27. Pre algebra

    The purchase price of a book is $35.85 the sales tax rate is 6.5% how much is the sales tax to the nearest cent what is the total cost of the book

  28. General Chemistry 132

    When solid NH4NO3 is dissolved in water at 25celcius, the temp of the solution decreases. What is true about the signs of enthalpy and entropy for this process? I understand entropy is positive, however, i do no understand why enthalpy is also positive.

  29. chemistry

    What is the oxidation number of chlorine in Al(ClO4)3?

  30. English

    This excerpt highlights the Maori cultural value family members should ______ one another

  31. physics

    A rain cloud contains 3.56 x 107 kg of water vapor. How long would it take (in seconds) for a 4.5 kW pump to raise the same amount of water to the cloud which has an altitude of 1741.4 meters?

  32. math

    find the slope of the line that goes through the following points: x 0 1 2 3 _________________ y -4 -3 -2 -1

  33. Trig

    secθsinθ is equivalent to: Ans: tanθ?

  34. math

    1. two circles. x^2+y^2-16x-8y+35=0 and x^2+y^2=5 are given. a. write the equations in the standard form. b.prove that the circles touch each other. c.hence calculate the equation of their common tangent 2. find the equation of a. circle. with centre

  35. calculus

    find the exact arc length of the curve: y=0.5(e^x + e^-x) for 0 is less than or equal to x and x is less than or equals to ln2.

  36. Math

    A cylinder cop has a circular base of radius 7cm & height of 10cm taking 22/7(a)calculate it curved surface(b)d area of it circular base

  37. science

    a desk is classified as a solid because it has a definite shape and volume at what???

  38. Chemistry

    Liquid vitamin C, (ascorbic acid) C6H8O6 , readily reacts with atmospheric oxygen, O2, to form liquid dehydroascorbic acid, C6H6O6 and water. How many mole of oxygen gas is required to react with 1000.0 mg of vitamin C? Chemistry - DrBob222, Wednesday,

  39. chemisrty

    The molar mass of Fe(OH)3 is 106.87 g/mol. How many moles of H2SO4 are needed to react completely with 5.419 g of Fe(OH)3?

  40. Chemistry

    Copper has a specific heat of 0.387 J/g·°C. How much energy is required to raise the temperature of 460. g of copper from 34.5°C to 232.0°C?

  41. Calculus

    Find the area of the region bounded by the curves y=x^2 - 2x and y= x + 4

  42. Chemistry

    A solution is prepared by titrating a 100.0 mL sample of 0.10 M HF (Ka = 7.2 × 10-4) with 0.10 M NaOH.What is the pH after 20.0 mL of the 0.10 M NaOH is added?

  43. SS

    How does India’s form of government contrast with the governments of Pakistan and Afghanistan? India is an Islamic republic; the others are not. Pakistan and Afghanistan have a long history of democratic government. India does not have a constitution.

  44. Algebra

    1. Tell whether x and y show direct variation. a. 5x - 3y = 0 b. x = y - 2 / 9 2. The variables x and y vary directly. Use the values to find the constant of proportionality and write an equation that relates x and y. a. y = 4; x = 6 b. y = 2; x = 10

  45. Physics

    A sled mass of 40 kg is pulled along a snow covered surface. The coefficient of static friction is 0.40 and the coefficient of sliding friction is 0.25 a) what force is needed to start the sled moving? b)what force is needed to start to keep the sled

  46. Math

    Jeanine used 21/2 cups of flour to make muffins and 1 3/4 cups of flour to make biscuits. After borrowing 1/4 cup of flour,she had 2 1/4 cups left to make bread. How much flour did she have to begin with?

  47. algebra

    4/5 x -3 3/4 x 2 1/2 =

  48. Chemistry

    If the solubility of Ag2CO3 is 1.3×10^-4 mol/L what is the Ksp? I'm trying to do it but my answer I keep on getting is wrong and doesn't match the text book which is 8.8×10^-12

  49. Chemistry

    If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations leading to an answer.

  50. chemistry

    how many ml of nitric acid will neutrilize 20 ml of KOH at .5 moles

  51. Calculus

    What is the derivative of tan(1-x)^(1/2)?

  52. History

    Think about how deterrence was used by President John F. Kennedy. Explain deterrence and compare two modern day countries with nuclear power and explain a situation where deterrence can be utilized against both countries to prevent war.

  53. financial

    Stock. What is the value of a stock with a $3 dividend just paid and a 8% required return with 2% growth? Bond. What is the value of a $1,000 par value bond with annual payments of an 11% semiannual coupon with a maturity of 20 years and a 11% required

  54. ELA

    Which of the following is a way you could begin an essay that's about the medical uses of iodine? A. Last summer, a splinter in my brother's leg became infected, which led to blood poisoning. He could have prevented the problem with a few drops of iodine.

  55. Math Help

    With the given information below, write the standard form equation for the parabola. 1.) Vertex: (-1,2) Focus(-1,0) 2.) Vertex: (-2,1) Directrix x=1

  56. math

    City wide delivery service uses vans costing $24800 each. How much will the company have to invest today to accumulate enough money to buy six new vans at the end of 4 years? City wides bank is currently paying 12% interest compounded quarterly

  57. Math

    There are 64 students. 80% scored a 75 on a final test. How many students scored a 75?

  58. Math

    Find the level of elevation of the sun when a 842 foot building casts a shadow72.6 feet long

  59. Chemistry

    A solution is made by dissolving 26.7 g urea, a nonelectrolyte, in 301 g water. (The vapor pressure of pure water is 23.8 torr at 25°C and 71.9 torr at 45°C.) Calculate the vapor pressure of this solution at 25°C.

  60. chemistry

    water is flowing at 3 m/s in a horizontal pipe under a pressure of 200 kpa. the pipe, which narrows to half its original diameter, is laid out on a level ground? a) what is the speed of flow in the narrow section? b) what is the pressure in the narrow

  61. calc (confused)

    A wedge is cut from a right circular cylinder of radius r by two planes, one perpendicular to the axis of the cylinder and the other making an angle (beta) with the first. Find the volume of the wedge by slicing perpendicular to the y-axis. Please show all

  62. mathematics

    If cos 9 alpha = sin alpha 9 alpha < 90 degree then 5 alpha =

  63. mathematics

    If cos 9 alpha = sin alpha 9 alpha < 90 degree then 5 alpha =

  64. Algebra

    The following problem refers to an arithmetic sequence. If a_4 = 15 and a_10 = 39, find a_40 and S_40. The _ represents subscript

  65. math

    prove that: 4cosec2ACot2A=cosec^2A - sec^2A

  66. Statistics

    A countrywide estate agency specializes in selling commercial ventures. Their records show that the mean selling time is less than 90 days. Because of recent economic conditions, they believe that the mean selling time is now greater than 90 days. A

  67. Chemistry

    Evacuated glass ampules is held at 1000 degree C with a perfect vacuum inside.estimate e steady state leak rate per unit area of nitrogen gas into th e ampule.the diffusivity of nitrogen gas is 10^-11 m^2/s.wall thickness of ampule is 0.5 mm.surface

  68. Economics

    What are the cost and consequences of providing the subsidies and welfare?

  69. geometry

    the track rises 1 foot for every 11 feet run. find the measure of the angle formed by the track and ground level

  70. chemistry

    A commercially. Available. Sample of sulphuric acid is 15percent h2so4 by weight density 1.10gm per ml find molality and normality

  71. Physics

    In an ac circuit with frequency 25 Hz producing an rms voltage of 30 V and a 30 Henry inductor, what is the rms current going through the inductor?

  72. Physics

    In an AC circuit with a frequency 25 Hz producing an rms voltage of 30 V and a 20 farad capacitor, what is the end current?

  73. chemistry

    20 g NaOH are dissolved in 1 L H2O. What is the N of the NaOH solution?

  74. maths

    solve this equation for m0 vm=u(lnm0-lnms)-gtf

  75. math

    A countrywide estate agency specializes in selling commercial ventures. Their records show that the mean selling time is less than 90 days. Because of recent economic conditions, they believe that the mean selling time is now greater than 90 days. A

  76. chemistry

    20 g NaOH are dissolved in 1 L H2O. What is the N of the NaOH solution

  77. university of hartford

    suppos the velocity is given by v=9t^4. Find the displacement as a function of time if s=6 when t=0

  78. Math

    This is my sample: 29,083 ; 25,314, 31,920 ; 30,750 ; 32,302 I need to find the mean and standard deviation of this sample?! How can i assure the life spans are normally distributed?

  79. chemistry

    select one acid, one base, and one salt and describe specifically how and where they are used in therapeutic processes.

  80. Calc

    Use the table of integral to evaluate: the integral of x^4 sinxdx. Please indicate the number of formula used.

  81. Pre-Calculus

    Evaluate. 1-|200+||-2|(-5)^3|| I get 49 as an answer

  82. Language arts

    Ok so I have to do a powerpoint presentation on the Holocaust. My topic is how Anne Frank's life represented the Jewish experience during the Holocaust and I need 3 websites. (If I find some I will update this post) :)

  83. chemistry

    why does the neutrality in the blood depends on the concentrations of [H+] and [OH-] rather than pH.

  84. Calculus

    Find the volume of the solid obtained by rotating the region bounded by y= x^2, y=0, and x=3 about the x-axis.

  85. Calculus

    Find the volume of the solid obtained by rotating the region bounded by y= x^(1/3), and y= x about the line y=1

  86. Calculus

    The region bounded by y= e^x, y=0, x= -1 and x=1 is rotated about the x-axis, find the volume generated.

  87. chemistry

    If the volume is 226 L at 1.7 atm, find the volume at 2.8 atm. Assume the temperature and amount of gas remain constant. Answer in units of L.

  88. Calculus

    A cable that weighs 3 lb/ft. is used to lift a golf cart which weighs 700 lbs up to the deck of a boat which is 300 ft above a loading dock. Find the work done.

  89. math

    48,778 ; 41,046 ; 29,083 ; 36, 394 ; 32,302 ; 42,787 ; 41,972 ; 37,229 ; 25,314 ; 31,920 ; 38,030 ; 38,445 ; 30, 750 ; 38,886 ; 36,770 ; 46,046 use five classes. is it reasonable to assume that the life spans are normally distributed? I don't get what am I

  90. Precal

    Find the limit if it exists. 1. Lim x--> 3 (square root of x+1) -2 over (x-3)

  91. Marketing

    I am creating a business which is an Ice cream shop. It asks me what types of promotion will I use for my business, and it lists 5 promotions. Personal selling, advertising, direct marketing, sales promotion, and public relations. I think I am going to go

  92. Spanish 3

    ¿Por qué viajan muchos peregrinos a Santiago de Compostela hoy en día? Parece un lugar agradable . También entiendo que los peregrinos van allí por razones religiosas.

  93. Calculus

    Find the average value of the function f(x)= 8/ (3+x)^2 on the interval [0,2]

  94. math

    A. determine the equation of the circle passing through points A(3;2) B(8;12) and C(-6;-2) B. a chord of the circle x^2+y^2=50 has a midpoint at (6;3). determine the equation of this chord.

  95. calculus

    Use table of integrals to evaluate the integral of x^4 sinxdx.

  96. math

    use L'Hospital's rule to evaluate: limit as x approaches to 0 of (1/sinx -1/x)

  97. calculus 1 (I need help)

    The portion of the ellipse x^2/9+y^2/4=1 with x greater than or equals to 0 is rotated about the y-axis to form a solid S. A hole of radius 1 is drilled through the center of S, along the y-axis. Find the exact volume of the part of S that remains. Show

  98. math

    Q - 8 = -9

  99. Chemistry

    Use the equation below to answer the following question. How many grams of calcium chloride are produced from 19.3 g of HCl? 2HCl + Ca(OH)2 à 2H2O + CaCl2 Give your answer in correct sig digs and correct label.

  100. math

    write 10 1/2% of 60

  101. math

    Suppose the matrix A has eigenvalues lambda_1 = -1, lambda_2 = 1, lambda_3 = 2, with corresponding eigenvectors v_1 = [0 5 3]^T, v_2 = [2 0 1]^T, v_3 = [1 -1 0]^T. If you diagonalize A as A = PDP^-1 with P = [2 2 0; p_21 p_22 2; p_31 p_32 p_33], D = [2 0

  102. Social Studies

    Why did the United States enter World War 1? A. It did not agree with British politics. B. It wanted land in Europe. C. It was attacked by Japan.*** D. It wanted the economic opportunities that the war could bring.

  103. english

    "I hope this song will help you to bring your country back to its stage it was and motivate to develop it more further. " Since the logic of the dialogue is not correct; write a short reply going against him. ( DEBATE )

  104. SS

    What is the source of many of the political conflicts in south asia a. overpopulation b. taxation c. religious rivalry d. water resources C?

  105. Chemistry

    10.6gram of hydrated zinc tetraoxosulphate (vi) on heating to constant mass gave 5.95g of the anhydrous form.Calculate the number of molecules(x) of water of crystalization in the hydrated salt.(zn=65,s=32,o=16,h=1)

  106. foundation of education

    Which types of student are most popular? Do you believe that popularity patterns have changed much in recent decards? Why?

  107. Physics

    A sled mass of 40 kg is pulled along a snow covered surface. The coefficient of static friction is 0.40 and the coefficient of sliding friction is 0.25 a) what force is needed to start the sled moving? b)what force is needed to start to keep the sled

  108. Social Studies

    What are the causes of the water pollution that threaten South Asia today? overpopulation, growing cities, damming of rivers, and the need for more irrigation burning down of forests, building of new factories, and more cars the use of major rivers in

  109. Math

    . At a track meet, 50 people ran the 100-meter dash. 2 people finished in 11 seconds, 5 people finished in 12 seconds, 8 people finished in 13 seconds, 10 people finished in 14 seconds, 21 people finished in 15 seconds, 2 people finished in 16 seconds, and

  110. algebra

    what is the slope of a line that passes through the points (-4,-3), (4,3)? what is the slope of a line that passes through the points (2,1), (6,3) write the answers as a fraction.

  111. Chemistry

    If 0.176 g of pure sodium hydroxide was dissolved in water and the solution titrated with 5.05 mL of hydrochloric acid solution to a phenolphthalein end point, calculate each of the following of the hydrochloric acid solution. (a) the molarity = .871 (b)

  112. Social Studies 9

    Describe the achievements of Joseph Brant. I can't find it

  113. English

    What are some issues that many Hispanic poets used in his poems ? Appoints two or more subjects, at least.

  114. social studies

    which statement best describes bollywood's way of making movies? a. bollywood films make use of modern technology to tell stories about twenty-first century india b. bollywood films draw from hindu epics to tell stories about heros,love, and adventure c.

  115. life orientation

    List and discuss any four factors that could threatenorlimitthe core functions ofthemedia

  116. Quant Reasoning

    Stereo Inc. sells a stereo system for $300 down and monthly payments of $80 for the next 3 years. If the interest rate is 4.25% per year, find: a) The cost of the stereo. Answer = $ b) The total amount of interest paid. Answer = $

  117. Algebra

    The following question is about specific geometric progression Find a_4 and S_4 for 100, −10, 1, . (Round your answer for S4 to three decimal places.) The _ represents subscript.

  118. Francais

    Remplacez les tirets par le, la , l' ou les 1. Georges? Il LE aime beaucoup 2. Les oeuf frais? On LES vend au marche 3. Mes grands-parents? Je LE visite ce week-end 4. Sa maison? Il LE loue 5. L'argent ? Je le depense facilement 6. Les disques classiques?

  119. Physics

    A weather balloon is released at an altitude of 500m. The force of gravity on the balloon is 21.1n. The lift force provided by the atmosphere is 18.7n. Which of the following is true about the balloon? a. The balloon rises at constant velocity. b. the net

  120. English

    True or false? An audience would give much praise to a pathetic speaker.

  121. Math

    i really don't understand. i tried figure out. i started with the first charges: sqrt[2(20)(100))/0.05} Suppose you have a choice of three suppliers for footballs. the first charges $100 per delivery but won't deliver more than 200 at a time; the second

  122. XD

    James, Karen, and Lou are hiking. Lou forgot to bring any water. James brought 2 gallons of water and Karen brought 1 3/4 gallons of water. The three of them agree to divide all the water equally among them. Lou gives $2 for the water he receives, which

  123. XD

    In a 24 km race, during which each runner maintains a constant speed throughout, Alice crosses the finish line while Becky is still 8 km from finishing and Caitlin is 12 km from finishing. When Becky crosses the finish line, Caitlin still has d kilometers

  124. physics

    Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 521 nm, determine the number of photons per second per square meter that reach

  125. intermediate algebra

    the radiator in Johns car contains 16 L of antifreeze. How much of this mixture should be drained and replaced with pure antifreeze so there will be a mixture of 50% antifreeze.

  126. Chem

    The combustion of hydrogen with oxygen is used to produce extremely high temperatures needed for certain types of welding procedures. What is the quantity of heat generated, in kj, when a 180g mixture containing equal parts oxygen and hydrogen gasses by

  127. Help plz on Calc

    The portion of the ellipse x^2/9+y^2/4=1 with x greater than or equals to 0 is rotated about the y-axis to form a solid S. A hole of radius 1 is drilled through the center of S, along the y-axis. Find the exact volume of the part of S that remains. Show

  128. Math

    A $10 bottle of detergent yields 10 loads of laundry. Allen tries this detergent & finds he can do only 8 loads of laundry from 1 bottle. What fraction of the advertised # of loads was he able to do?

  129. spanish 3

    I need some help with these true or false questions: 1. ¿Esta oración utiliza los pronombres correctamente?: Jaime da un regalo a su hermano. Jaime dáselo. TRUE** 2. ¿Esta oración untiliza los pronombres correctamente?: Yo compro un disco para ti. Yo

  130. spanish 3

    I need some help with these true or false questions: 1. ¿Es este el el tiempo de verbo correcto para el pasado?: Hoy yo voy a la escuela. Ayer yo iba a la escuela. FALSE** 2. ¿Es este el tiempo de verbo correcto para el pasado?: Cada domingo, yo doy un

  131. Life orientation

    Describe the human rights violation that is taking place in your community or in the neighbouring community. Give your own position on xenophobia