Questions Asked on
April 27, 2012

  1. chemistry

    1.0 M aqueous solutions of AgNO3 , Cu(NO3 )2 and Au(NO3 ) 3 are electrolyzed in the apparatus shown, so the same amount of electricity passes through each solution. If 0.10 moles of solid Cu are formed how many moles of Ag and Au are formed?

    asked by James
  2. chemistry 2

    A voltaic cell is constructed with an Ag/Ag+ half-cell and a Pb/Pb2+ half-cell. Measurement shows that thesilver electrode is positive. -Write balanced half-reactions and the overall spontaneous reaction.

    asked by anonymous
  3. chemistry

    an empty glass tube weights 37.3 g. when filled to the rim with water is weighs 54.1g. what is the volume of the glass tube?

    asked by RoseBud
  4. Calculus

    Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 5 seconds. The maximum rate of air flow into the lungs is about 0.5 L/s. This explains, in part, why the function

    asked by Elizabeth
  5. Chemistry

    Hydrogen atoms are excited to the stationary state designated by the principal quantum number, n= 4. What will be the number of lines(frequencies) emitted by the hydrogen atoms?

    asked by Wube
  6. physics

    A 50.0kg cyclist on a 10.0kg bicycle speeds up from 5.0m/s to 10.0m/s , the total kinetic energy before acceleratingis 750, and after acceleratingis 3000, how much work is done to increase the kinetic energy of the cyclist and the bicycle

    asked by Melissa
  7. chemistry

    an empty jar weighs 1.43 pounds. How much will it weigh when 1.00L of homgenized milk is poured into it? trhe density of homogenized milk is 1.03g/ml. (1 pound= 453.6g)

    asked by RoseBud
  8. chemistry

    what will be the final temperature of a system in which 150.0g of water at 5.0 degrees C are added to 1.00L of water at 90.5 degrees C?

    asked by RoseBud
  9. Maths

    Solve:- 5ax+6by=28 , 3ax+4by=18 using cross multiplication method

    asked by Ashley
  10. Consumer Math

    Find the annual amount of FICA at a 7.51% rate by computing his annual salary. Sam Takagi Weekly salary: $435.16 Not self-employed Find the annual amount of FICA by computing his annual salary. $169,938.68 $16,993.87 $1,699.39 2. Find the annual amount of

    asked by Emily
  11. Geometry

    The three angles of a triangle have measures 12x degree, 3x degree, and 7y degree, where 7y>60. If x and y are integers, what is the value of x?

    asked by Anonymous
  12. math URGENT!

    28. You are surveying students to find out their opinion of the quality of food served in the school cafeteria. You decide to poll only those students who buy hot lunch on a particular day. Is your sample random? Explain. 29. Ira wants to determine the

    asked by jksl
  13. Alg 2

    If there are 12 candidates in a city election. The winner will be the mayor and the runner up will be the vice mayor. How many different combinations of mayor and vice-mayor are possible? Would it be 12P2 = 132 ? o:

    asked by Lisa
  14. physics

    On July 15, 2004, NASA launched the Aura spacecraft to study the earth's climate and atmosphere. This satellite was injected into an orbit 705 {\rm km} above the earth's surface, and we shall assume a circular orbit. How many hours does it take this

    asked by Amber
  15. calculus

    In a certain city the temperature (in degrees Fahrenheit) t hours after 9 a.m. was approximated by the function T(t) = 50 + 14sin((pi*t)/12). Find the average temperature (in degrees Fahrenheit) during the period from 9 a.m. to 9 p.m. I got

    asked by Elizabeth
  16. chemistry

    what mass of water at 10.0 degrees C is needed to cool 500.0ml of tea from 25.0 degrees C to 18.3 degrees C? Density and specific heat of the tea are the same as water.

    asked by RoseBud
  17. science

    A relative density bottle has a mass of 40g when empty, 90g when filled with water and 80g when filled with oil. Calculate the relative density of the oil.

    asked by isaac
  18. statistics

    assume adults have an IQ score that are normally distrubted with a mean of 105 and standard deviation of 20 A) find the percentage of adults that have an IQ between 94 and 116 B) find the percentage of adults IQ exceeding 120 C)Determine the 1st, 2nd, and

    asked by VICTORIA
  19. Chemistry

    A heliox deep-sea diving mixture delivers an oxygen partial pressure of 0.20 atm when the total pressure is 13.0atm .What is the partial pressure of helium in this mixture?

    asked by Jessica
  20. dynamics

    at the bottom of a loop the speed of an airplane is 400 mph. this causes a normal acceleration of 9 g ft/sec^2, determine the radius of the loop

    asked by aaa
  21. Chemistry

    What are the possible values of the azimutal quantum number for an electron in the 4f subshell?

    asked by Wube
  22. Chemistry

    An ice cube at 0.00 degree celsius with a mass of 23.5 g is placed into 550.0 g of water, initially at 28.0 degree celsius, in an insulated container. Assuming that no heat is lost to the surroundings, what is the temperature of the entire water sample

    asked by Amir
  23. statistic

    a bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean of 175 and a standard deviation of 15. if an applicant is randomly selected, find the probability of a rating that is between 150 and 200

    asked by charmaine
  24. Chemistry

    which of thh following reactants would you add to an aqueous solution of ammonium sulfate in order to precipitate quantitatively all the sulfate? A. CaCl2 b. Al(NO3)3 c. Zn(C2H3)2)2 d. KBr

    asked by Rosebud
  25. chemistry

    For each of the following precipitation reactions, calculate how many grams of the first reactant are necessary to completely react with 17.5 of the second reactant.

    asked by Aaron
  26. physics

    A large rock that weighs 164.0 N is suspended from the lower end of a thin wire that is 3.00 m long. The density of the rock is 3200 kg/m^3. The mass of the wire is small enough that its effect on the tension in the wire can be neglected. The upper end of

    asked by anonymous
  27. algebra 2

    What are the co-vertices of the ellipse 3x^2+2y^2=72? thank you....

    asked by amy
  28. chemistry

    Ethylene glycol, C2H6O2, is used as antifreeze for automobile engines. If you want to produce 2.00 kg of ethylene glycol from the reaction of C2H4Cl2 and Na2CO3, what is the minimum amount of Na2CO3 that is needed? C2H4Cl2(l) + Na2CO3(s) + H2O(l)=C2H6O2(l)

    asked by Maggie
  29. physics

    A 6.0g pellet of lead at 32 degrees c gains 36.8 J of heat. What will be its final temperature

    asked by Melissa
  30. algebra 2

    Graph the equation. Identify the vertices, co-vertices, and foci of the ellipse. 64x^2+16y^2=1024 This is what i have so far vertices (0,8)(0,-8) foci(0,4√3),(0,-4√3)

    asked by sam
  31. geometry

    A shuttle bus for a festival stops at the parking lot every 18 minutes and stays at the lot for 2 minutes. If you go to the festival at a random time, what is the probability that the shuttle bus will be at the parking lot when you arrive?

    asked by Anonymous
  32. maths

    i will be greatful to you if you help in solving the below problems: 1.)Prove that log15=log5+log3 2.)Show that log10800=4log2+3log3+2log5 3.)show that log108/605=2log2+3log3-log5-2log11.

    asked by srikar
  33. Chemistry

    based on the following chemical equation HCN+O2 yields N2+CO2+H20 identify the limiting reactants and the mass of N2 produced when 100.0g of HCN react with 100.0g of O2. a. the limiting reactant is HCN and 25.9g of N2 are produced b. the limiting reactant

    asked by RoseBud
  34. STATS

    recent 10K run the finisher are norm dist with a mean of 55 min and stand dev of 13 A) determine the percentage of finishers with times between 45 and 75 min B) determine the percentage of finshers less than 80 min C) obtain the 30th percentile D) find the

    asked by RACHELLE
  35. Solving Trig equation

    Solve the trig equation exactly in the interval 0≤x≤2π. tan x + tan π/3 ------------------ = square root 3 1 - tan x tan π/3

    asked by Anonymous
  36. math

    write the following in compact form using factorials a. 38*37*36*35*34*33 b. 14!/19*18*17*16*15

    asked by Nathan
  37. algebra 2

    What is the equation of an ellipse with a vertex of (0, 3) and a co-vertex of (-2 , 0)? i think its 9x^2+4y^2=36...not sure

    asked by sam
  38. algebra

    Write the slope intercept equation for the line containing the given pair of points. (6,8) and (3,5)?

    asked by carol
  39. Chemistry

    Consider a process in which an ideal gas is compressed to one-sixth of its original volume at constant temperature. Calculate the entropy change per mole of gas. I know that the formula is chg.entropy= nRln(V2/V1), but how do I get the values for V2 and

    asked by Jematormal91
  40. statistics

    A sociologist is studying marriage customs in a rural community in Denmark to determine the age of the woman at the time of her first marriage. The sample standard deviation of these ages was 2.3 years. The sociologist wants to estimate the population mean

    asked by b
  41. Chemistry

    The reaction (nitrogen monoxide reacts with hydrogen gas to form nitrogen gas and water vapor) is believed to take place in three steps, the first of which is the fast reversable dimerization of NO to form N2O2, and the last of which is the reaction N2O +

    asked by Crystal
  42. math

    How do u simplify . Express final answer using positive exponents. 2^3= (B^4)^-3=

    asked by tae
  43. Chemistry

    The solubility of NH4CL is 50g/100g of water at 50°C. How many grams of NH4CL will dissolve in 20 g of water?

    asked by Ay3
  44. Intermediate Algebra

    Find the Absolute Value by solving this algebraic-equation? x-1/3=1/2x+1/6

    asked by Roger
  45. trig

    Consider the trigonometric function f(t) = -3+4cos(pi/3(t-3/2)) What is the amplitude/period of f(t)? What are the maximum and minimum values attained by f(t)?

    asked by Dave

    a particle moves on a circular path of 20 ft radius so that its arc distance from a fixed point of the path is given by s= 4 t^2-10t where a is in feet and t is in seconds. compute the total acceleration at the end of 2 sec.

    asked by aaa
  47. psychology

    I am sorry. I do not understand this question. It has been only an year since I came to America and I have hard time understanding teacher and textbook. THis is the question for my homework but I do not know the right answer to this. Thank you everyone.

    asked by Delhi
  48. biochemistry

    Why does a change in pH usually produce a change in the ability of an enzyme to act as a catalyst? A. When the pH changes, the enzyme may lose its native conformation and lose its ability to function as a catalyst. B. When the pH changes, enzymes are

    asked by krystal
  49. physical science

    two tuning fork are struck at the same time. one tuning fork has a frequency of20 hz while the second tuning fork has frequency of 226 hz. how beats will result?

    asked by dbbbsnhr
  50. life orintation

    identify and describe one environmental problem that causes ill health,crises,accidents,and disasters within your community or any other community within south africa or globally

    asked by peter
  51. math

    solve for x 4(2x-1)= 2x+35

    asked by joan
  52. statistics

    Fred’s car insurance premium is £448 compared to last year when it was only £375. What is the percentage increase?

    asked by Anonymous
  53. algebra 2

    find the product (2a+1) cubed

    asked by scott
  54. Chemistry

    1. What mass of carbon is required to produce 100kj of heat, when burned in air? Enthalpy change = -392kj. 2. What mass of methanol is required to produce 1000kj of heat, when burned in air?

    asked by Josie
  55. Calculus 2 correction

    I just wanted to see if my answer if correct the integral is: ∫(7x^3 + 2x - 3) / (x^2 + 2) when I do a polynomial division I get: ∫ 7x ((-12x - 3)/(x^2 + 2)) dx so then I use u = x^2 + 2 du = 2x dx 1/2 du = x dx = ∫7x - 12/2∫du/u - 3/1∫1/u =

    asked by Tom
  56. Chemistry


    asked by Joy
  57. English - ms. sue

    Ms. sue for the persasive essay on glass castle, you tell me to give examples in essay to prove thesis which be that her father be better parent. The teacher say there have to be 4 bodies. So the first one be introduction, second one and third one be

    asked by Mohammad
  58. geology

    Create a 12- to 15 slide Microsoft® PowerPoint® presentation for your chosen geologic feature. Address the following: · Describe the various geologic events that have occurred in the region around your feature. · Describe the geological features and

    asked by sweetbev
  59. math

    How tall is a man that casts a shadow at the same time a 40 ft. building casts a 60 ft shadow?

    asked by Anonymous
  60. math

    When a person is swinging the amplitude (the swings"s distance above it's rest position) increases with each pump. According to Scientific magazine the amplitude increases by adding a constant when the person pumps sitting down, and by multiplying by a

    asked by John
  61. economics

    The differing goals of the Fed and Congress represent which type of problem?

    asked by dijah
  62. Chemistry

    What physical properties will the ionic compound CaSO4 be expected to have?

    asked by Jesse
  63. MATH URGENT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    Tara is researching the stork population living in a bird reserve. On her first day, she captures and tags 37 birds. Two weeks later, she captures 48 birds and finds that 30 are not tagged. Estimate the actual number of storks in the bird reserve. 27. In a

    asked by Eric
  64. chemistry

    A voltaic cell is made with aluminum and zinc electrodes. (For Ag+(aq) + e- → Ag(s), E0 = 0.80 V and for Cu2+(aq) + 2e- → Cu(aq), E0 = 0.34 V)On the diagram below, draw and label: the salt bridge, the electrical connection between the two jars, the

    asked by Anonymous
  65. chemistry

    When setting up an electroplating system, how do you set up the terminals of the voltage source to the anode and cathode? Does oxidation or reduction happen at the cathode? What does this require? Based on your answer, to which terminal of the battery

    asked by Anonymous
  66. chemistry

    Determine the emf for the cell noted below. (For Co3+(aq) + e- → Co2+(aq), E0 = 1.80 V, and for Na+(aq) + e- → Na(s), E0 = -2.71 V.) Na(s) | Na+(aq) || Co3+(aq), Co2+(aq) | Co(s) What is being oxidized? What is being reduced? What has the more positive

    asked by Anonymous
  67. chemistry

    Several things stand in the way of hydrogen fuel cells becoming widely used. Is it easy or difficult to store enough hydrogen to fuel a car? Is the technology expensive or cheap? Is the infrastructure present?

    asked by Anonymous
  68. chemistry

    What is the general form of a common automobile battery? How many electrodes does a car battery use? Does it use an acidic aqueous electrolyte solution? Is the battery rechargeable? Is the battery voltaic or electrolytic when discharging? Is the battery

    asked by Anonymous
  69. chemistry

    Using the change-in-oxidation-number method, balance the redox reaction below. Show your work; partial credit will be given. NO2– + MnO4– → NO3– + Mn2+ Figure out which atoms’ oxidation numbers are changing, and by how much. Balance the equation

    asked by Anonymous
  70. chemistry

    Using the half-reaction method, balance the redox reaction below. Show your work; partial credit will be given. I- + Br2 → IO3- + Br- Write the reduction and oxidation half-reactions. Balance them for atoms. Balance each of the half-reactions for charge.

    asked by Anonymous
  71. Chemistry

    A fossil is found to have a C-14 level of 86% compared to living organisms. How old is the fossil?, (the half life of C14 is 5730 years).

    asked by Mima
  72. Simple & Compounding Interest

    I am SO STUCK on this problem... PLEASE HELP ASAP!!! Suppose Kevin and Jill both deposit $4000 into their personal accounts. If Kevin’s account earns 5% simple interest annually and Jill’s earns 5% interest compounded annually, how much will each

    asked by Need Help!!!
  73. Physics

    Pls sir, kindly send the solution to my email. thanks. 1)A boat propelled so as to travelled with a speed of 0.50m/s in still water, moves directly ( in straight line ) across a river that is 60m wides. The river flow with a speed of 0.30m/s. How long in

    asked by Abbey
  74. Chemsitry

    Hi I have done this problem like 15 times when I find the mole I get .8 for HCL and .23 for Naoh and the equilibrium conc i get is negative. then I plug it in and get it wrong. Can someone please help me? Complete the table below: Note: Make simplifying

    asked by someone
  75. algebra 2

    Write an equation of the ellipse with center at (0, 0), vertex at (4, 0), and co-vertex at (0, 2)

    asked by sam
  76. algebra 2

    Write an equation of the hyperbola with foci (0, -2) and (0, 2) and vertices of (0, -1) and (0, 1).

    asked by sam
  77. Algebra

    f(x)= -x^2 + 2x + 15 I search for the coordinates and keep coming up with (-3,5,0) Yes, I am a idiot. Can someone help please?

    asked by Alexis2
  78. algebra 2

    Write an equation of an ellipse with center at (0, 0), co-vertex at (-4 , 0), and focus at (0, 3). I think its... X^2/16+y^2/9=1

    asked by sam
  79. algebra 2

    Write an equation of the hyperbola with vertices at (–7, 0) and (7, 0) and foci at (–9, 0) and (9, 0)

    asked by sam
  80. Physics

    A pendulum consist of a particle P of mass m, attached to one end of a model string of length l=2.85m. The other end of the string is attached to a fixed point O and the particle moves in a vertical circle about the fixed point. The angle made by the

    asked by Anonymous
  81. Environmental Chemistry

    The Henry’s Law Constant for dimethyl sulfide is 0.14 mol/L-atm. Its atmospheric concentration is 0.001 ppb (i.e., 0.001µg/L). Calculate the dissolved concentration of dimethyl sulfide in water.

    asked by Helen
  82. algebra 2

    Graph the equation. Identify the vertices, foci, and asymptotes of the hyperbola. Y^2/16-x^2/36=1 I think....vertices (0,4),(0,-4) foci??? asymptotes y=+/- 2x/3

    asked by sam
  83. math

    In the glass atrium at the entrance to the city aquarium, a designer wants to suspend a 2400-N sculpture of a dolphin. It will be secured by three chains, each of length 4 m. The chains are anchored to the ceiling at three points, spaced 3 m apart, that

    asked by justin
  84. Life orientation

    Critically discuss 8 ways in which the environmental problem(teenage pregnancy)impacts on our community

    asked by Terry
  85. Algebra

    Bayside Insurance offers two health plans. Plan A pays $90 + 40%. Plan B pays $140 + 35%. Giselle would savfe with plan B if she had more than ---in bills.

    asked by Natalie
  86. math

    What's the length of the arc ab and the area of the sector aob

    asked by james
  87. physics

    A transparent hemisphere of refractive index 1.5 and radius of curvature 20 cm is placed flat side down on a piece of paper with a 4.0 mm tall letter G written on it such that G is in the center.What is the size of G when viewed directly from above

    asked by sand
  88. Physics

    a plastic light pipe has anindex of refraction 1.53.For total internal reflection, what is the minimum angle of incidence if the pipe was in the air

    asked by @@@TASHA@@@
  89. physics

    a circular wire loop of radius 5cm lies in the xy-plane in a magnetic field defined by B=-(4t^2+3t).determine the voltage across the resistor at time t=2s

    asked by musa
  90. Algebra 2

    If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s (where h and s are in ft, t is in seconds and v is in ft/sec) If a rock is dropped from the top of

    asked by Nancy
  91. Chemistry

    Calculate the mass of each compound containd in 60g of a 4.5%m/m CaCl2(aq)solution

    asked by Victoria
  92. Medical Coding 1

    Please help me with these questions to see if I'm right or close 1. Which of the following ICD-9-CM code groups is used to report the infant status after delivery of a birth event? A. V27.0–V27.9 B. V26.0–V26.9 C. V29.0–V29.9 D. V28.0–V28.9 I

    asked by Alisha M
  93. compound interest

    If I invest $30000 at 10% compound interest for eighteen years how much will i get

    asked by alan
  94. Chemistry

    the heat of fusion water is 335J/g,the heat of vaporization of water is 2.26kJ/g, the specific heat of water is 4.184J/deg/g. how many grams of ice at 0 degrees could be converted to steam at 100 degrees C by 9,574J

    asked by Randy
  95. calculus

    I need to prove that the following equation is an identity: (1 + tan(theta/2))/(1-tan(theta/2))=tan(theta)+sec(theta)

    asked by Rod
  96. geometry

    AB=5 BC=9 AC=8

    asked by Anonymous
  97. spanish/check please

    Va de compras con una amiga.Te dice que necesita comprar y tu' le das consejos usando palabras como (este,esta,y esto) ( Hint tell your friend to buy clothes) Necessito unos pantalones-------Compra (estos) pantalones Necessito una camiseta-----Compra

    asked by JOSEPH
  98. Chemistry

    In a 0.05M solution of a weak monoprotic acid,[H+]=.0018.What is its Ka?

    asked by Danny
  99. LIfe orientation

    Identify and describe one environmental problem that causes ill health, accident,crises,and disasters with in south africa or globally (5)

    asked by Bongani
  100. exp 105

    The coordinating conjunctions that can be used to combine two complete sentences with a comma are “for, and, nor, because, yet, so.” (

    asked by Anonymous
  101. chemistry

    2-octanol and 1-phenilethanol. which one more polarity?

    asked by trang
  102. algebra

    What is 3 radical 250 expressed in simplest radical form ?

    asked by yamileks rodriguez
  103. Math

    what is $10.5002 rounded to the nearest cent, dime, and dollar. My work: cent: $10.50 dime: $10.50 dollar: $2:00 Did I do good?

    asked by george
  104. algebra2

    If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s (where h and s are in ft, t is in seconds and v is in ft/sec) Solve for t when the object hits the

    asked by Nancy
  105. srac

    do you give grants to 17 year olds through hhs human service

    asked by toni
  106. Finance

    Calculate the weighted cost of equity for a firm with the following characteristics: (a) Last Dividend--$5.00, (b) Growth Rate—6%, (c) Price of Stock--$125.00 and (d) Weight of Equity Capital—40%

    asked by David
  107. computer science

    XYZ Corporation employs 40,00 people with their own associated IP addresses, and operates over 400 servers, including e-mail (SMTP and POP3), FTP, Web, and DHCP at two locations: one in Muncie, Indiana, the other about 20 miles away in Hartford City. Dual

    asked by Ginger
  108. Calculus

    I'm supposed to find the average value of the function over the given interval. f(x) = sin(nx), interval from 0 to pi/n, where n is a positive integer. I know the average value formula, and I know that the integral of that function would be (-1/n)cos(nx),

    asked by Anna
  109. Differential Calculus

    y = 1 + (x-1)^(1/2) Considering the interval (2,4), calculate delta(y) and dy. would delta(y) be: delta(y) = f(4) - f(2) = (1 + squr(3) ) - 2 = squr(3) - 1 and dy is 1/(2 squr(x-1)) dx Thank you

    asked by Jeremy
  110. consuer math

    Question 1: The cost of joining a gym is $195 plus $50 per month. Rewrite the equation to express cost as a function of time, identify the slope and the y-intercept.

    asked by alex
  111. chemistry

    you add 13.7g HCL to water and make 500 mL solution. what will the solutions osmotic pressure be?

    asked by Nicolette
  112. algebra

    The circular path of cars on a ferris wheel can be modeled with the equation x^2-14x+y^2-150y=-49, measured in feet. What is the maximum height above ground of the riders.

    asked by Dena
  113. English - ms. sue

    ms. sue for yesterday chapter questions on water for elephants i hve few more questions the main character say all i do is put time wait ing... that mean he feeling down and not want to live anymore, he give up?

    asked by Mohammad
  114. Trig Help!

    Question: Trying to find cos π/12, if cos π/6 = square root 3 over 2, how to find cos π/12 using DOUBLE angle formula? This is what I got so far.. cos 2(π/6) = cos (π/6 + π/6) = (cos π/6)(cos π/6) - (sin π/6)(sin π/6) = cos^2 π/6 - sin^2 π/6 Is

    asked by Anonymous
  115. statistics

    any state auto insurance company took a random sample of 370 insurance claims paid out during a 1-year period. the average claim was $750 with a standard deviation of $150. find .99 confidence interval for the mean claim payment.

    asked by b
  116. business statistics

    This select group has been asked to consider the Colorado City Convention and Visitors Bureau survey of 25 hotels in the local area. The survey is concerned with the current availability of rooms. The availability of the rooms was as follows: 90, 72, 75,

    asked by taabbie
  117. Art 101

    Describe how each artist(Da Vinci and Michelangelo) View drawing as part of the creative process.

    asked by Carla
  118. Algebra

    If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) a ball is thrown upward with initial

    asked by Billy
  119. algebra 2

    Write an equation in standard form for the hyperbola with center (0,0), vertex(4,0) , and focus (8,0). 1) x^2/64-x^2/16=1 2)x^2/16-y^2/64=1 3)y^2/48-x^2/16=1 4)x^2/16-y^2/48=1

    asked by sam
  120. spanish/check please

    Completa la oracion usando las palabras este,ese,aquella oaquellos.) (Hint:Complete the sentence using este, ese,aquella,o aquellos) 1. Mira el caballo que esta delante de mi.Mira( ....) caballo. answer:( ese) 2 ¿Ves la llama que está lejos de nosotros?

    asked by JOSEPH
  121. ECO/372

    what happens to the monry interrest rates and the economy if the federal reserves is not the seller of government bonds? I know the interest rates go down but not sure what else?

    asked by at
  122. algebra

    It took a contractor 1285 hours to manufacture their first unit of an item. If the contractor expects to acheive a 92% unit learning curve, how many hours would be required to manufacture units 51-100/

    asked by Mary
  123. databases

    Fernando Cilebra has always ben facinated by skateboards. Fernando has won several contests, both locally and nationally. His interest in skateboards led him to open Fernando's Shop in Denton, Maine. Fernando sells street, trick, and children's

    asked by Gloria
  124. geometry

    A cone is created from a paper circle with a 90° sector cut from it. The paper along the remaining circumference of the circle is the base of the cone. Find the radius of the base of the cone. Round to the nearest hundredth.

    asked by Alan
  125. Algebra 2

    A bug is placed on the road. t seconds after it is put down, the function is p(t) = -16tsquared + 64t, where p(t) is measure in feet. At what moment will the bug be 14 feet from where it began?

    asked by Marcia
  126. Algebra/Steve

    Hi, I am looking for the x coordinates only..f(x)= -x^2 + 2x + 15 Thanks..

    asked by Alexis2
  127. Chemistry

    A solution of .12 mol/L of phosphoric acid completely neutralizes .20L of a solution of sodium hydroxide with.a concentration of .15mol/L What is the neutralizing volume of the phosphoric acid?

    asked by Kelly
  128. business law

    at issue in the twenty-first century is the trade-off between the necessity of writers, musicians, artists, and movie studios to profit from their work and the free flow of ides for the public benefit. Move and music industry participants claim that

    asked by tam
  129. infinite geometric series

    7. ‡” 8on top(-1/2)^n-1 n=1 8.‡” 8 on top 3(0.4)^n-1 n=1

    asked by Algebra 2
  130. algebra 2

    A swimming pool in the shape of an ellipse is modeled by x^2/324+y^2/196=1, where x and y are measured in feet. Find the shortest distance (in feet) across the center of the pool? i think its 28 feet....

    asked by sam
  131. Algebra

    3. There are 12 red checkers and 3 black checkers in a bag. Checkers are selected one at a time, with replacement. Each time, the color of the checker is recorded. Find the probability of selecting a red checker exactly 7 times in 10 selections. Show your

    asked by Liz
  132. math

    A geometric series has first term 8 and third term 20 what does the fifth term equal? What does the third partial sum equal?

    asked by Kate
  133. math

    When a number is divided by 42 the remainder is 39 and when it is divided by 36 the remainder is 33.find the number.

    asked by Clovis
  134. physics

    (a) What is the frequency of a photon whose energy is 3.5 times the rest energy of an electron? (b) What would be the linear momentum of the photon?

    asked by joe
  135. Science

    I have a few questions if someone could please help with them: Which of the following is true: A.Relative dating tells us how long ago something existed B.Disconformities are less common but usually far more conspicuous because the strata on either side

    asked by Kelly
  136. Chemistry

    Consider a process in which an ideal gas is compressed to one-sixth of its original volume at constant temperature. Calculate the entropy change per mole of gas.

    asked by Jematormal91
  137. Evaluating Limits

    Evaluate lim x/((x+2)^2 - 4) as x-> 0 or state that the limit does not exist. My book said I can substitute 0 into the equation. I did that and came up with ____0_____ (0+2)^2 -4 which simplifies down to ___0___ which = _0_ which = _0_ = 0. 2^2 - 4 4-4 0

    asked by Tabby
  138. english

    In what ways does Peter Pan (the play) explore notions of masculinity and femininity for its time period? Based on examples from the text, what is expected of boys/men and girls/women?

    asked by Monica
  139. Algebra

    Give exact approximate solutions? HUH? to three decimal places. y^2-20y+100=64 In terms of i and use radicals if needed. :-) Thanks

    asked by Michelle27
  140. math

    how do you evaluate this expression 14.6+[(42-21.4)*35]

    asked by shion
  141. Chemistry

    Suppose that 50.0mL of 0.240M sulfric acid requires 36.0mL of KOH solution to reach its endpoint. What is the molarity of the KOH solution?

    asked by Leonarda
  142. Chemistry

    3.42 grams of Ba(OH)2 is placed in a flask, dissolved in water, and titrated with an HCI solution. It is found that 25.0mL of the HCI solution is required to just neutralize the Ba(OH)2. What is the molarity of the HCI solution?

    asked by Leonarda
  143. spanish/check please

    Va de compras con una amiga.Te dice que necesita comprar y tu' le das consejos usando palabras como (este,esta,y esto) ( Hint tell your friend to buy clothes) Necessito unos pantalones-------Compra (estos) pantalones Necessito una camiseta-----Compra

    asked by JOSEPH
  144. math

    how do you evaluate this expression 18.9-[(33.3~11.1)*6]

    asked by shion
  145. Math

    How do I simplify this? :l 4(x+y)]/(5x^2y^3) ÷ (-2x-2y)/10

    asked by Lea
  146. consumer math

    The cost of joining a gym is $195 plus $50 per month. Rewrite the equation to express cost as a function of time, identify the slope and the y-intercept.

    asked by alex
  147. math

    how do you evaluate this expression 18.9-[(33.3~11.1)*6]

    asked by shion
  148. Math

    prove the identity: sin^2 O/ 1-cos O = 1+cosO O= theta

    asked by amber
  149. math

    how do you evaluate this expressuion 18.9-[(33.3divied11.1)*6]

    asked by shion
  150. math

    how you evaluate this expression 3*[(18*5)divide3]

    asked by shion
  151. math

    how do you evaluate this expression 3*[(18*5)divide3]

    asked by shion
  152. MATH

    if I scored 72 out of a 100, what do i need to score to bring up may average to 80%

    asked by Phil
  153. Math-Funtions

    1)Expand and simplify. Express each equation in standard form. a) f(x) = -2(x-1)(x+4)(x+1)(x-3) b) f(x) = (x+2)(x+1)(x+4) c) f(x) = x(x-6) 2) For each function in question 1. state the degree of the polynomial and identify the type of function

    asked by sandra
  154. physics

    a farmer moves along the boundary of a square field of side 10 meter in 40 seconds. what will be the magnitude of displacement of the farmer at the end of 2 minutes and 20 seconds from his initial position?

    asked by afrin
  155. Math-Functions

    1)Expand and simplify. Express each equation in standard form. a) f(x) = -2(x-1)(x+4)(x+1)(x-3) b) f(x) = (x+2)(x+1)(x+4) c) f(x) = x(x-6) 2) For each function in question 1. state the degree of the polynomial and identify the type of function

    asked by sandra
  156. math

    evaluate 18.8-[(33.3^11.1)*6]

    asked by shion
  157. environment

    do you agree human should be allowed to change the nature?

    asked by Koia
  158. Geography

    What is the easternmost nation of southern Europe?

    asked by Anna
  159. environment

    how do people from the Pacific treat the environment?

    asked by Koia
  160. Physics

    500 J of heat are added to 59 g of water initially at 20°C. (a) How much energy is this in calories? (b) What is the final temperature of the water? I know that to find (a) I have to use the constant 4.19 J and divide it into the 500 J yielding 119.33

    asked by Mandi
  161. gcse geography

    Please could someone help me with this question. 5 arguments for wild farms and 5 argumets against wild farms. thankyou for taking the time to help me.:)

    asked by Kim
  162. Pre- Calculus

    An antenna is located at the top of a building 1000 ft tall. From a point on the same horizontal plane as the base of the building, the angles of elevation from the top and the bottom of the antenna are 65.8 degrees and 62.6 degrees respectively. How tall

    asked by Connie
  163. Ashford University

    I have (10) questions in History (HIS-204). 1. What is Leon Czolgosz most remembered for? (Points : 1) Anarchism Assassination Socialism Terrorism 2. At the end of the Spanish-American War, what defined the way that the United States attempted to exert its

    asked by Anonymous
  164. Reiny or Damon or Bobpursley

    Express the series 11 + 18 + 27 +...+ 171 using sigma notation. Usually you would take 27-18 and that's the step between numbers, right? (I think its the k-value?) But 27-18=9 and 18-11=7. Are we stepping by k+2 here? Like k, k+2 k+4, k+6...? Please help

    asked by Tabby
  165. Reiny Damon Bobpursley?

    Thanks for reading this! A triangular prism has vertices at A(2,-1,-1) B(2,1,4) C(2,2,-1) D(-1,-1,-1) E(-1,1,4), and F(-1,2,-1)? This question has two parts: 1 - Which image point has the coordinates (-3,2,1) after a translation using the vector I'm

    asked by Tabby
  166. Humanities

    If the protection itself were the sole basis for a society's morality, which of the following laws would that society want passed? If the protection itself were the sole basis for a society's morality, which of the following laws would that society want

    asked by yong
  167. Humanities

    Which of the following pairs believed that all people are driven by self-interest? A.Bentham and Machiavelli B.Bentham and Mill C.Socrates and Plato D.Kant and Sartre

    asked by yong
  168. science

    Create a 12- to 15 slide Microsoft® PowerPoint® presentation for your chosen geologic feature.

    asked by sweetbev
  169. chemistry

    am in need of help with my final project in Geology. I have to create a 12-15slide powerpoint presentation on Factors and Forces of Geological Features, The Barnett Shale. I have the final rubric Final Rubric: |Factors and Forces of Geological Features

    asked by sweetbev
  170. math

    The width of a rectangle is x inches long. The length of that rectangle is 5 inches less than Twice the width. If the perimeter measures 26 inches, what is the measure of the length and width of the rectangle.

    asked by marie
  171. geology

    Use the following table to identify five historical events influenced by the depletion of natural resources. Explain each event in at least 150 words. Event What Happened? Example: Easter Island This island, now called Rapa Nui, is most notable for giant

    asked by sweetbev
  172. com220

    What other strategies might you use? Provide a rationale for your choices.

    asked by denise
  173. physics

    A transparent hemisphere of refractive index 1.5 and radius of curvature 20 cm is placed flat side down on a piece of paper with a 4.0 mm tall letter G written on it such that G is in the center.What is the size of G when viewed directly from above

    asked by sand
  174. Social Studies

    Need to unscramble letters of a geography phrase saiwnsgiem it is two words _ _ _ _ _ _ _ _ _ _ Can you help figure?

    asked by Jenay
  175. Science

    what does it mean that nitrogen is a limiting nutrient in many marine ecosystems?

    asked by Brianna
  176. math

    how would you evaluate 7+2.5*3=28.5

    asked by shion
  177. veterinarians as prescribers

    Alteration of the physical form of a drug outside its label is

    asked by brad
  178. Statistics

    A study in Orlando, Florida claimed that the mean commute time for all employees working at Disney exceeds 40 minutes. This figure is higher than what was assumed in the past. The plan is to test this claim at a level of significance = 0.05 and a sample

    asked by Latoya
  179. History

    I need some information on China's modern genocides and crimes against humanity staying the 20th century.

    asked by Logan
  180. English

    Help me to write these answer question, Write an essay that illustrate the saying every cloud has a silver lining in 340 words

    asked by David
  181. biochemistry

    a. What is the net charge on valine at pH 1? b. at pH 7? c. at pH 14?

    asked by krystal
  182. chemistry

    what is the hcl of 2.00x 10 squared mL of 0.51

    asked by patricia
  183. biochemistry

    What is the net charge on Phe-Asp at each pH? a. pH 1 b. pH 7 c. pH 14

    asked by krystal
  184. math

    determine if these lines are parallel, perpendicular, or neither 2x+5y=8 and 5x+2y=2

    asked by Ashley