Questions Asked on
May 2, 2010

  1. college Chemistry

    What is thhe pH of 500mL of solution containing 0.0124 grams of Ca(OH)2?

    asked by jahil
  2. College Chemistry

    What is the approximate pH of a solution labeled 6 x 10^-5 M HBr?

    asked by jahil
  3. College Chemistry

    what is the approximate pH of a solution labeled 0.050 M HClO? I realized my mistake on my last post but this isnt a strong acid nor a strong base so how do i solve this?

    asked by jahil
  4. Physics

    a thimble is 32.0 cm from a spherical concave mirror. The focal point lenght of the mirror is 11.0 cm. What is the image position?

    asked by Luis
  5. chemistry

    SO2 (5.00 g) and CO2 (5.00 g) were placed in a 750.0 mL container at 50.0 °C. The partial pressure of CO2 in the container was __________ atm.

    asked by nick
  6. Chemistry - Bond Order

    What is the bond order of the diatomic molecule BN and is it paramagnetic or diamagnetic?

    asked by Coldier
  7. physics

    1. what happens to a narrow light beam that enters parallel to the principal axis on a spherical concave mirror? 2. what happens to a narrow light beam that passes through the focal point of a concave mirror before being reflected?

    asked by Karen
  8. CHemistry

    Arrange the following compounds in order of decreasing ease of elution from a column of silica gel: a) 2-octanol; b) 1,3-dichlorobenzene; c) tert-butylcyclohexane; d) benzoic acid I was wondering if this was the correct order of it: Tert-butylcyclohexane >

    asked by Johnny
  9. Chemistry

    Which of the following substances has the greatest solubility in water? A. Ca(OH)2, Ksp = 6.5 × 10-6 B. Ag2SO4, Ksp = 1.5 × 10-5 C. PbI2, Ksp = 7.9 × 10-9 D. Zn(IO3)2, Ksp = 3.9 × 10-6 E. BaF2, Ksp = 1.5 × 10-6

    asked by Marco
  10. math

    Electrical system are governed by Ohm's law, which states that V = IR, where V=voltate, I=current, and R=resistance. If the current in an electrical system is decreasing at a rate of 9 A/s while the voltage remains constant at 14 V, at what rate is the

    asked by christine
  11. Trig

    A railroad tunnel is shaped like semi-ellipse. The height of the tunnel at the center is 69 ft and the vertical clearance must be 23 ft at a point 16ft from the center. Find an equation for the ellipse.

    asked by Stacey grahaM
  12. math

    Show that if a rectangle has its base on the x-axis and two of its vertices on the curve y = e^-x^2 , then the rectangle will have the largest possible area when the two vertices are at the points of inflection of the curve.

    asked by Hou
  13. Chemistry

    Which one of the following pairs of 0.100 mol L-1 solutions, when mixed, will produce a buffer solution? A. 50. mL of aqueous CH3COOH and 25. mL of aqueous CH3COONa B. 50. mL of aqueous CH3COOH and 25. mL of aqueous HCl C. 50. mL of aqueous NaOH and 25. mL

    asked by Macky
  14. calculus

    Find the position function s(t) given acceleration a(t)=3t if v(2)=0 and s(2)=1.

    asked by yach
  15. math Please someone help!!

    a rectangular table is two times long as it is wide if the area is 98ft^2 what is the width and length of the table

    asked by marry
  16. spanish

    can you unscramble this spanish word: amiaramtdrs?

    asked by j.c.
  17. Chemistry

    What precautions must be taken when you introduce the mixture of compounds to be separated onto the absorbent column

    asked by James
  18. Calculus

    Emily and Clare kick a soccer ball at the same time. Emily kicks it with a force of 120 N at an angle of 60 degrees and Clare kicks it with a force of 200 N at an angle of 120 degrees. The angles are measured from a line between the centres of the two

    asked by Bobby
  19. Chemistry

    Calculate the freezing- and boiling-point changes for a solution containing 12.0 g of naphthalene (C10H8) in 50.0 g of benzene.

    asked by Mariah
  20. Chemistry 11th Grade

    Two oxides of lead were separately reduced to metallic lead by heating in a current of hydrogen and the following data obtained : (i) Mass of yellow oxide taken = 3.45g Loss in mass during reduction = 0.24g (ii) Mass of brown oxide taken = 1.227g Loss in

    asked by Akashdeep
  21. math

    the statue of liberty is 150 feet tall, and stands on a 150 foot pedestal. How far from the base should you stand to have the statue subtend the largest possible angle at your camera lens, assuming the camera is held 5 feet off the ground and the ground is

    asked by Chris
  22. physics

    By what factor will the rms speed of gas molecules increase if the temperature is increased from 0 degrees C to 100 degrees C? Cant figure out correct answer I've tried everything, please help!!!

    asked by Anonymous
  23. Chemistry

    Calculate the boiling points of freezing points of the following solutions in water. a) boiling point of a 2.25m solution of propylene glycol (a non-electrolyte) b)freezing point of a 1.0m solution of potassium iodide c)freezing point of a 1.0m solution of

    asked by Ralph
  24. probability Please check answer

    A bag contains 7 red marbles, 2 blue marbles, and 1 green marble. If a marble is selected at random, what is the probability of choosing a marble that is not blue? 7 red marbles plus 1 green marble = 8/10 = answer = 4/5

    asked by Bart
  25. science

    Granite comprising Stone Mountain crystallized from magma tens of kilometers within the Earth, but uplift and erosion has since laid this pluton bare. Assuming that erosion has only slightly modified the original shape of the more durable granite body,

    asked by Amanda
  26. Chemistry

    If you have 0.100 M Pyridine titrated with 0.100 M HCl, choose an appropriate indicator and explain?

    asked by Andrew
  27. Geometry

    In Triangle ABC, a=7, b=6, and c=8. find angle B to the nearest degree?

    asked by Sally
  28. STATISTICS

    BECAUSE OF THE ASSUMPTION THAT THE POPULATION VARIANCES ARE EQUAL, WHEN YOU DO A ANALYSIS OF VARIANCE.

    asked by WAYMOND
  29. statistics

    6. A sociologist interested in cultural differences compared women of two ethinic groups on a Role Approval Index (high scores mean high degrees of approval of one's social role). The results are as follows: Ethnic Group A: N = 15 M= 55 S2 = 6.5 Ethnic

    asked by Anonymous
  30. math

    Determine if the given regular figures form semi regular tessellation. Triangle,decagon,15-gon Yes or no

    asked by tracy
  31. Chemistry

    A buffer contains 5.00 M acetic acid and 5.00 M acetate anion. Gaseous HCl (0.010 mole) is added to 1.00 L of this buffer solution (the total volume does not change). For this buffer solution, the initial pH is_______and the final pH after the addition of

    asked by Ivana
  32. Calculus

    An airplane is flying at 550 km/h on a heading of 080 degrees: The wind is blowing at 60 km/h from a bearing of 120 degrees. Find the ground velocity of the airplane.

    asked by Ariza
  33. English

    1. He lived to be eighty. 2. He lived until he was eighty. (Does #1 mean #2?) 3. He awoke to find himself famous. 4. He awoke and found himself famous. (Are both the same?) 5. He grew up to be a famous musician. 6. He grew up and became a famous musician.

    asked by rfvv
  34. calculus

    Boyle's law states that if the temperature of a gas remains constant, then PV = c. Where P is the pressure, V is the volume, and c is a constant. Given a quantity of gas at constant temperature, if V is decreasing at a rate of 13 in.^3/s, at what rate is P

    asked by Hussain
  35. Chemistry

    Answer the following question about copper (II) sulfate pentahydrate: a)how much water (in g) is there in 10.0 g of the compound listed above? b)If you needed 2.50g of CuSO4 for a reaction but only had CuSO4 * 5H2O available, how many g would you need to

    asked by Jack
  36. Math SAT Sheet

    1.) Find the domain and range for: f(x)= 4x-20/ the square root of 36-x^2 2.) Solve the equation: log6 (x-11) + log6 (x-6) = 2 3.) Solve the inequality: x^2 - 2x - 3 is greater than 0

    asked by Frank
  37. Calculus

    A cruise ship's captain sets the ship's velocity to be 26 knots at a heading of 080 degrees. The current is flowing toward a bearing of 153 degrees at a speed of 8 knots. What is the ground velocity of the cruise ship?

    asked by Bobby
  38. Math

    Staley Watch Company reported the following income statement data for a 2-year period. 2008 2009 Sales $210,000 $250,000 Cost of goods sold Beginning inventory 32,000 44,000 Cost of goods purchased 173,000 202,000 Cost of goods available for sale 205,000

    asked by Angie
  39. social studies

    How did the geography help the romans prosper?

    asked by Jessica
  40. chemistry 1

    When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction How many grams of calcium carbonate are needed to produce 49.0 of carbon dioxide at STP?

    asked by safwan hakim
  41. Physics

    in many cars the passanger-side-rear-view mirror has a warning that reads "objects may be closer than they appear" is the mirror concave or convex? Explain

    asked by Karen
  42. English

    Can you help me improve my last questions? Thank you very much for your invaluable help. Anna answered one of them.

    asked by Franco
  43. Science

    A car is traveling at 15 m/sec. Ten minutes later it is traveling at 70 m/sec. What is the acceleration?

    asked by Jordan
  44. physics help!

    A tire is filled with air at 17 degreees C to a gauge pressure of 220 kPa. If the tire reaches a temperature of 39 degrees C, what fraction of the original air must be removed if the original pressure of 220 kPa is to be maintained? Please help step by

    asked by Anonymous
  45. Logistics

    supply chain management case analysis Dream Beauty Company questions and answers Can't find questions to this case analysis anywhere. Professor gives the case analysis ahead of time but doesn't give questions or answers and we have to read it and hope we

    asked by Ashley
  46. Chemistry

    A battery is constructed based on the oxidation of magnesium and the reduction of Cu^2+. The initial concentrations of Mg^2+ and Cu^2+ are 1.2*10^-4M and 1.5M, respectively, in 1.0-L half-cells. The initial voltage of the battery is 2.83V with the standard

    asked by Emma
  47. Chemistry

    To what Celsius temperature must 44.5 mL of methane gas at 43.0°C be changed so the volume will be 63.0 mL? Assume the pressure and the amount of gas are held constant.

    asked by Megan
  48. Chemistry

    A buffer is prepared by adding 300.0 mL of 2.0 M NaOH to 500.0 mL of 2.0 M CH3COOH. What is the pH of this buffer? Ka = 1.8 × 10-5

    asked by Anavia
  49. chemistry

    True or False? An equilibrium constant K_c=1x10^7 for a reaction indicates that the reaction favors product formation.

    asked by Sheila
  50. English

    Happiness: What is happiness? This is what a poet says: Happiness is a butterfly which when pursues is just beyond your grasp... but if you will sit down quietly, may light upon you. This is what I say: Happiness is the crisp autumn breeze Which when

    asked by Sara
  51. Algebra 2

    a) A population of 460 animals that increases at an annual rate of 15%. Write an exponential function to model. b) Write an exponential function to model. Predict the value of the function after 5 years(nearest whole number). A population of 430 animals

    asked by Alex
  52. math

    The spring runoff from melting snow from a certain region is being accumulated in a reservoir. The reservoir is 450 yards long; and its ross-section is an isosceles triangle 40 yards wide at the top and 20square root(3) yards high. Water is flowing into

    asked by Voh
  53. chemistry

    In the chemical plating experiment zinc powder is dissolved in a hot NaOH solution to form sodium zincate according to the following reacton: Zn(s) + 2NaOH(aq) Na2ZnO2(aq) + H2(g) Answer true or false for each of the following statements regarding the

    asked by chem help
  54. School Lunches

    I'm writing a letter to parents about their child's lunch. What can you mention in a "no-food sharing" policy, with the reasons why?

    asked by AL 87
  55. Chemistry

    An unknown compound analyzes to be 42.85% C, 7.20% H, and 49.95% N. A 0.915 g sample of the gas occupies 250. mL at 760. mm Hg and 100.°C. Type your answers using the format CH4 for CH4. Enter the elements in the order given. I have calculated the

    asked by Megan
  56. Chemistry

    Which of the following compounds will melt ice at the lowest temperature? Sucrose, sodium chloride, or magnesium chloride?

    asked by Jack
  57. literature

    answers to exam 778900 the novel

    asked by john
  58. calculus

    At what point on the parabola y = 1-x^2 does the tangent have the property that it cuts from the first quadrant a triangle of minimum area? Find the minimum area.

    asked by Brown
  59. Chemistry

    "Calculate the pH of NaCl". I know that NaCl is neutral...but I don't know how to show that it is neutral. The ka value for the Cl ion is "very large", so what do I do?

    asked by Stuck
  60. Chemistry

    In each of the following, determine how much solute (in g or mL) must be added to the correct quantity of water to make the given amount of solution at the correct concentration. a)KI to make 50.0mL of a 0.50 M solutioon b)12.0 M HCL to make 500 mL of a

    asked by Kim
  61. marketing

    what is the process of reducing consumer demand for a product to a level that the firm can reasonably supply? what form of marketing is this?

    asked by tina aklin
  62. Chemistry

    the following questions are about colligative properties: a)How much would the freezing point change in a 2.5 solution of phenol in benzene? b)how much would the boiling point change in a 1.m solution of magnesium chloride in ethanol? c)Does adding sugar

    asked by Kim
  63. Math

    Can someone assist me in the right direction with this question? Find an equation of the line containing the given pair of points. (-5,-6) (1,-3) The equation needs to be in slope intercept form. Thanks.

    asked by Sarah
  64. English

    1. She dicided to write a third book. 2. She decided to write the third book. (Which one is right? Are both grammatical? What is the difference between them?)

    asked by rfvv
  65. English

    1. We decided to go abroad. 2. We made up our mind to go abroad. 3. We made a decision to go abroad. 4. We made up our minds to go abroad. (Are they all interchangable? Do we have to use the plural form 'minds' or the singular form 'mind'?) 5. We

    asked by rfvv
  66. calculus

    If f''(x)=-4sin2x, f(0)=0 and f'(0)=2, find the value of f(pi/4).

    asked by skylor
  67. calculus

    Let g(x)= integraton (top 3x, bottom 2) e^t^4 dt. Find the value of g'(0).

    asked by Daniel
  68. calculus

    A small aircraft, on a heading of 225 degrees, is cruising at 150 km/h. It is encountering a wind blowing from a bearing of 315 degrees at 35 km/h. Determine the aircraft's ground velocity.

    asked by A
  69. ap chem

    NH3 + H20 NH4+ + OH- this is aqueous solution. In 0.0180 M nH3, THE [OH-] is 5.60 X 10^-4 M. it is assumed that the volumes are additive. Determine the value of the base ionization constant, kb, for NH3. i am not sure how to approach this problem. i don't

    asked by rav
  70. PHYSICS

    A sample of monatomic gas (ã = 5/3) is expanded adiabatically from an initial temperature, volume, and pressure of 230. °C, 7.00 litres, and 7.00 kPa, respectively, to a final volume of 10.0 litres. (a) What is the final pressure of the gas? (answer 3.86

    asked by Chris
  71. Chemistry

    Find the pH experimentaly .1 ml before and .1 ml after the equivalence point if the experimental equivalence point was found to be at 35 ml. In this titration, you are titrating 0.500 M NaOH with 0.250 M HCl.

    asked by Andrew
  72. statistics

    Compare the two sets and describe what you see. 1st set: 57 61 57 57 58 57 61 2nd set: 61 52 69 64 46 54 47

    asked by Faith
  73. Algebra II

    The perimeter of a rectangular yard is 270 feet. If its length is 25 feet greater than its width, what are the dimensions of the yard?

    asked by bev
  74. CHEMISTRY--URGENT

    HNO3 with pH 3 is mixed with 2 L KOH with pH 12. assuming volumes are additive what is the pH of the final solution? I have absolutely no idea how to do this. I do know the answer, though. I have a test tomorrow and I would really appreciate it if someone

    asked by Maggie
  75. Chemistry

    DrBob, if you're still on...what do I do for NaCl??

    asked by Stuck
  76. chemistry

    An aqueous solution of Na2SO4 has a molal concentration of 0.293 mol kg-1. Its density is 1.0350 g mL-1. Calculate the molar concentration of Na2SO4. ----- mol L-1 Calculate the mass percent of Na2SO4 in the solution. ------- % What is the mole fraction of

    asked by write2khin
  77. life science

    how have case studies been used to help develop our understanding of how the brain works?

    asked by alice
  78. HCR 230

    Write a 350- to 700-word response that familiarizes you with private payer plans and CDHP account types

    asked by Tiff
  79. MATH ANALYSIS

    I need help solving this problem algebraically, but I need to learn step by step!! Thanks so much cos 2x=cos x How do I do it?

    asked by anonymous
  80. Cody

    Write the following with rational, positive exponents. a. sqrt of 8 = 8^1/2 b. seventh root of 5^2 = 5^2/7 c. sqrt sqrt 6 = ??? d. fourth root of sqrt of 5^3 = ??? Can someone please check my work and help with "c and d"? Thanks.

    asked by Math (URGENT)
  81. Chemistry

    Consider a 980-mL container at 133 °C in which the pressure of nitrogen oxide is 0.394x106 Pa. a) What mass of nitrogen oxide (in g) is present in this container? b) How many molecules is this? (a)----g (b)-----molecules

    asked by write2khin
  82. Anthro Gr.11

    how does culture influence your behaviour. provide examples.

    asked by nini
  83. chemistry

    A student investigating the properties of solutions containing carbonate ions prepared a solution containing 7.493 g Na2CO3 in a flask of volume 250 mL. Some of the solution was transferred to a buret. What volume of solution should be dispensed from the

    asked by chemistrry help!
  84. Math

    3/4+1/2

    asked by Sabrina
  85. general psycology

    what is considered to be the normal average iq

    asked by Anonymous
  86. marketing

    what are two types of b2c marketing

    asked by tina aklin
  87. Math

    The rectangular coordinates of a point are given. Find two sets of polar coordinates for the point. (-3,-3)

    asked by Abbey(Please help)
  88. CHEMISTRY

    Complete the following nuclear reactions, which have been used to synthesize elements. This is one of the problems ^238_92U + ^12_6C --> __?__ + 6 ^1_0n What I am confused about is the 6 in front of the neutron. Do I multiply it by the 1 and the 0? So

    asked by Anonymous
  89. improper integral

    can any one explain how to evaluate this improper integral i.e. the function is not continuous at 0 neither at inf integration of [(e^(-sqrt(t)))/sqrt(t)]dt from 0 to infinity the integration part is easy but i want only how to evaluate it thanks

    asked by William
  90. Art

    Please help me unscramble these words:(foods) hdogtg hicps iclekp khecupt

    asked by Caity
  91. Math: please check

    Consider a bowl containing 36 different slips of paper. Ten of the slips of paper each contain one of 16) the digits from the set 0 through 9 and 26 slips each contain one of the 26 letters of the alphabet. If one slip is drawn at random, what is P(odd

    asked by Bart
  92. College psych - research class

    Hi all. I have a question about creating graphs and other data tables using Excel spreadsheets et al. It's actually for a specific kind of project where I'm trying to work on taking a theoretical sample of subjects and and I'm torn trying to figure out how

    asked by John
  93. chemistry lab

    1) What does a high Boltzmann Distribution value indicate? (please explain I already read wikepedia articles) 2) For fluoroacetic acid the highest Boltzmann Distribution is when the dihedral angle is at 0°. However, going from chloro- to bromo- and then

    asked by anonymous
  94. Accounting

    Jones Company had 100 units in beginning inventory at a total cost of $10,000.The company purchased 200 units at a total cost of $26,000. At the end of the year, Jones had 80 units in ending inventory. Instructions (a) Compute the cost of the ending

    asked by Angie
  95. lab chemistry please help!

    1. You recorded maximum electrostatic potential values for the ANTI and SYN conformers. What is this value a measure of? How does this value relate to acid strength? Does the trend seen for these values agree with the pKa value trend for both conformers?

    asked by anonymous
  96. Physics ptoblem

    At body temperature the latent heat of vaporization of water is Lv = 2.26 ¡Ñ 103 kJ kg−1. (a) A naked person with a surface area A = 1.55 m2 and a skin temperature £c = 37.3 ¢XC is in a sauna room at T = 82.0 ¢XC. The person's skin has an emissivity

    asked by kelly
  97. environmental science

    describes the water resource problem and how it came about. · provides a management and sustainment plan, in accordance with Appendix F, that might benefit both sides of the issue. · discusses the positive and negative aspects of the plan according to

    asked by Anonymous
  98. physics

    an electron and a proton are initially very far apart (effectively an infinite distance apart.) they are then brought together to form a hydrogen atom, in which the electron orbits the proton at an average distance of 5.29 x 10 -11 m. what is EPE final -

    asked by lara
  99. physics

    point a is located 0.25 m away from a charge of -2.1 x 10 -9 C. point b is located 0.50 m away from the charge. what is the electric potential difference Vb - Va between these two points?

    asked by kim
  100. math

    I have this question to work on, and I don't know where to start investigating the answer: The product of any two (whole) numbers each of which leave a remainder of 1 on dividing by 7, also leaves a remainder of 1 on dividing by 7. Why? I THINK that I can

    asked by charlie
  101. sicence

    If you place a metal ring in a region in which a magnetic field is rapidly alternating, the ring may become hot your touch, why? be as specific as you can

    asked by simon
  102. hca210

    How are health care administrators involved in determining the quality of care provided to patients?

    asked by Maria
  103. Math

    How many 3w by 6d bricks are needed to fill a 15 by 6ft area

    asked by Eric
  104. English

    Can you please help me rephrase these sentences taken from Letter 7 of Richardson's Pamelea, please? Thank you very much in advance. 1) Her master gave her two suits of fine Flanders laced head-clothes, three pairs of fine silk clothes, several ribbons and

    asked by Franco
  105. Grade 11 health

    This is an assignment, and it's a formal letter to parents about what they need to do when preparing their kid's lunch. Can somebody check it, please? I want some changes because it doesn't sound right. School Food Safety and Nutrition Program Dear Parent

    asked by AL 87
  106. English

    I forgot to include the following three sentences. Thank you vry much for your help! 10) In this letter emerges the conflict between low class and aristocracy, embodied by the son of Pamela’s mistress. 11) Pamela’s father suggests she should be careful

    asked by Franco
  107. Chemistry

    Is Lithium Thionyl Chloride a battery or it it a fuel cell

    asked by Laverne
  108. Trig

    Suppose you would like to cross a 204 ft wide river in a boat. Assume that the boat can travel 37 mph relative to the water and the current is flowing westbat a rate of 6mph. What bearing should be chosen so that the boat will land at a point exactly

    asked by Stacey grahaM
  109. chemistry

    What volume of solution should be dispensed from the buret to provide 3.718 mmol CO3 2-? answer in units of mL.

    asked by chemistrry help!
  110. algebra

    what is the solution of the following linear system? -5x - 5y = -6 -5/2x - 5/2y = -6 a) none b) (-2,2) c)(-,2,-2) d) infinite number of solutions and the answer i picked was a or d thanks :)

    asked by poo
  111. science

    how much chlorine gas in grams is obtained from the decomposition of 10.0g NaCl

    asked by jasmine
  112. algebra

    what is the solution of the following linear system? -4x - y = 5 -12x - 3y = 15 a) (-2,1) b) none c) (3,-2) d) infinite number of solutions

    asked by kid
  113. Biology

    Start by observing the living species around you. Ever wonder why a pollinator is attracted to a particular flower, or what would happen to predator species if a particular prey species is eliminated? If you were a scientist you could do an experiment to

    asked by Lisa
  114. college algebra

    help solve 8=2^5x * 4^x^2 logarithms

    asked by Cindy
  115. math analysis

    how do you solve sinx=cosx??

    asked by Itzel
  116. college algebra

    help solve 8=2^5x * 4^x^2 logarithms eight equals 2 to the 5x times 4 to the x squared in case I didn't write it correctly.

    asked by Cindy
  117. Math

    Please solve the equation for x: 8e^3x=24

    asked by Joe Schmo
  118. Physics

    would it be possible to view your body from head-to-toe, while standing in front of a plane mirror that is only as tall as you? this is in the chapter mirror on my physics books

    asked by Luis
  119. Chemistry

    How many moles of electrons are required to produce 23.8 g Cu from a CuSO4 solution?

    asked by Angel
  120. series

    hi, could any one explain how to find the interval of convergence of ln(1+x) series ? thanks

    asked by William
  121. TRIG

    Can someone please help me? Use identities to find the indicated value for each angle measure. sin θ = 12/13, cos θ > 0 Find cos (2θ).

    asked by Debbie
  122. 4th grade

    Who is the Seneca Leader who opposed th sale of any land to settlers in the Big Tree Treaty.

    asked by laura
  123. social studies

    What two inventions were developed while building the Erie Canal.

    asked by laura
  124. Math

    Multiply and Simplify: Can you please show me the steps on how you get the answer. Thank You 2/4n+6 times n^2+2n-3/n+1

    asked by Lauren
  125. Math

    Divide and Simplify: y^2-25/7 divided by 7y+35/49

    asked by Lauren
  126. Math

    True or False square root of 41 is a rational number. Explain

    asked by Sam
  127. physics

    the table below shows the values of the resistance, capcitive reactance and inductive reactance for five RCL circuits. in which circuit will the voltage lead the current? Resistance capacitive inductive reactance reactance a)50 ohm 288ohm 244ohm b)120 ohm

    asked by seema
  128. college physics

    A cubic box of volume 4.1×10^-2 m^3 is filled with air at atmospheric pressure at 20 degrees C. The box is closed and heated to 181 degrees C. What is the net force on each side of the box?

    asked by Anonymous
  129. math: is this done correctly

    There are 30 fish in a pond. We know that 13 of these fish are males, 4 of these males are salmon, and there are 8 salmon in the pond. What is the probability that a randomly chosen fish is a salmon, given that it is a male? I think they are just asking

    asked by bwb
  130. Finance

    • The acquisition cost is $35,000 paid at the time of installation. • It reduces the wait staff by one person: Figure $10 per hour, or 2020 hours per year + 18% benefits. • Money costs are 7% • The system may become obsolete in three years.

    asked by Anonymous
  131. physics

    what would the speed of an observer be if a red(4.688x10^14Hz) traffic light appeared green(5.555x10^14Hz) to the observer?

    asked by seema
  132. social studies

    Name two inventions that were developed while building the Erie Canal?

    asked by laura
  133. physics

    Unpolarized light with an average intensity of 750.0W.m^2 enters a polarizer with a vertical trasmission axis. the transmitted light then enters a second polarizer. the light that exits the second polarizer is found to have an average intensity of 125

    asked by seema
  134. math

    write a equivalent fraction of 3/9 and multiply or divide the numerator or denominator by the same number

    asked by Elijah
  135. human resources

    The way a company accounts for human resources is an example of which of the following financial statement limitations?

    asked by Diedra
  136. medical law and ethic

    A patient rolling up a sleeve to have a blood sample taken is an example of what?

    asked by Shun
  137. calculus

    pleaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasw help can you pleaaaaase help me find the area between y=cos(4x) and y=1-cos(4x) 0

    asked by aymal
  138. To SraJMcGin

    SraJMcGin, you are one good english tutor I see here right now, can you please help me with some of my English posts. Please. I'll posts them on here if you'd like. Thanks

    asked by Sara
  139. college physics

    If 61.9 L of oxygen at 17.7 degrees C and an absolute pressure of 1.55 atm are compressed to 46.4 L and at the same time the temperature is raised to 49.3 degrees C, what will the new pressure be?

    asked by Anonymous
  140. algebra

    find the slope and y-intercept of y=3.7x-2

    asked by Anonymous
  141. English-Please Help

    Can someone please have a moment to look at my other previous posts and correct them if they need to be corrected. Please halp me, I've been waiting for quite a long time. I'll appreciate all the help you could give me, thank you very much:-) My posts are

    asked by Sara
  142. art

    Summarize the use of space of Place de l’Europe on a Rainy Day in 150 to 200 words

    asked by Anonymous
  143. science

    I am doing a case study on MMR and MMR/Autism. The question I have been given is 'Does MMR cause autism?" Please can you suggest any websites etc. I need to find at least 5 sources to show for and against. Many thanks.

    asked by josie
  144. English/language/writting

    we have a speech do and we have to make an outline, so i did. my speech is on music so one of my ?'s on my outline is how many people (average) listen to pop music in the USA? can u help it's do tomorrow. thnx!!

    asked by Morgan
  145. math

    A town now has a population of 300,000 people and an annual growth rate of 4.5%. If this rate continues, in how many years will the population be more than 500,000 people?

    asked by Gio
  146. math

    what are all the coins? I know about the penny, dime, nickle, and quarter, but I'm not sure about the loonie and toonie. please name all the canadian coins.Thank You:)

    asked by shakti
  147. Science

    What are floods?

    asked by Disha
  148. Trig

    Use identities to find indicated values tan (theta)= (12/5), pi

    asked by Stacey grahaM
  149. physics

    A cubic box of volume 4.1×10^-2 m^3 is filled with air at atmospheric pressure at 20 degrees C. The box is closed and heated to 181 degrees C. What is the net force on each side of the box?

    asked by Anonymous
  150. Math

    3/y+2 over 7/y-4 can u please show me the steps on how you got the answer. Thank You

    asked by Scott
  151. Stats

    You are to imagine that you are part of a select marketing group. This group is to consider the Colorado City Convention and Vistitors Bureau survey of 25 hotels. The survey is concerned with the current availability of rooms. They are as follows: 90,

    asked by Jennifer
  152. Stats

    You are to imagine that you are part of a select marketing group. This group is to consider the Colorado City Convention and Vistitors Bureau survey of 25 hotels. The survey is concerned with the current availability of rooms. They are as follows: 90,

    asked by Jennifer
  153. Algebra1

    The area of a playground is 221 yd2. The width of the playground is 4 yd longer than its length. Find the length and width of the playground. (Hint: Include correct units in your final answer.) (3 points) pleas show me how you got the answer. Thank you:)

    asked by MW
  154. biology

    Can someone please help me with this question? Thanks! What organic molecules make up the structure that surrounds the DNA molecule?

    asked by Lydia
  155. Health/SCI302

    1. Compare and contrast how different electrolytes—sodium, potassium, and chloride—function in the body. 2. What effects might alcohol and caffeine have on hydration levels in the body?

    asked by Toni
  156. Calculus

    A force of 200 N is resolved into two vector components of 150 N and 80 N. Are these rectangular vector components? Justify your response. If they are not, determine the directions of the components.

    asked by Ariza
  157. statistics

    2. The new Twinkle bulb has a standard deviation hours. A random sample of 77 light bulbs is selected from inventory. The sample mean was found to be 492 hours. a. Find the margin of error E for a 90% confidence interval. Round your answer to the nearest

    asked by stefanie
  158. algebra 2 honors math

    what is the inverse of the function f(x)=2x2+2?

    asked by deja
  159. people

    Why don't you have Juan Seguin!!!!!!!!!

    asked by Max
  160. people

    Why don't you have Juan Seguin??????????

    asked by Max
  161. economics

    Suppose there are two goods. The demand for good 1 is q1=a-bp1+ep2 and the demand for good two is q2=a-bp2+ep1. a and b are strictly positive, |e|

    asked by Emma
  162. Calculus

    Resolve a 500-N force into two rectangular vector components such that the ratio of their magnitudes is 2:1. Calculate the angle between the greater component and the 500-N force.

    asked by Kayla
  163. College Chemistry

    For a certain first-order reaction the rate constan is 2.9 s-1. what is the fraction of the reactant remaining after 4 half lives?

    asked by jahil
  164. calc

    the tangent line to the graph of y=sin x at the point (2pi/3, (radical 3)/2) crosses the sine graph at the point where x=?

    asked by Lauren
  165. science

    what causes our floods?

    asked by Disha
  166. English

    Thank you very much for helping me. Can you please check these last two sentences, please? 1)Pamela’s father believes that a girl’s beauty should be evaluated on the basis of virtue and goodness . It should therefore not be confused with vanity or

    asked by Franco
  167. Algebra

    How can you mathematically prove that two lines are perpendicular?

    asked by Anonymous
  168. Algebra

    Determine which two equations represent perpendicular lines. (a) y = 3x – 6 (b) y = 1/3x + 6 (c) y = –1/3x + 6 (d) y = 1/3x – 6 Determine which two equations represent parallel lines. (a) y = –4x + 2 (b) y = 4x + 2 (c) y = 1/2x + 2 (d) y = –4x +

    asked by Anonymous
  169. calculus

    Two cars, one traveling north and one traveling west, collide at an intersection.The resulting momentum of the two cars together after the collision is 32 000 kg . m/s N30degreesW. Find the momentum of each car before the collision.

    asked by Abi
  170. Statistics

    I'm confused.Can someone tell me if I have done this correct.I'm trying to get the average using a weighted scale: TOTAL GRADES: WEIGHT 90% 5% 100% 15% 95% 15% 90% 5% 94.5% 60% I multiplied the total grade by the percent, then added the percent. But I get

    asked by Sue
  171. stats

    H0: pi=.60, alpha:.05 x:56 n:80 I really don't get where Alpha is involved, pls help. Thanks

    asked by barty
  172. trig

    Please help me! SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Verify that each equation is an identity. (sec α + tan α)^2 = 1 + sin α/1 - sin α

    asked by Lilli
  173. algebra 2

    Determine which two equations represent parallel lines. (a) y = –4x + 2 (b) y = 4x + 2 (c) y = 1/2x + 2 (d) y = –4x + 6

    asked by Anonymous
  174. english

    does this sentence make sesse. he ate a apple.

    asked by Emma
  175. algebra again

    How can you mathematically prove that two lines are perpendicular?

    asked by Anonymous
  176. statistics

    H0: pi=.60, alpha:.05 x:56 n:80 I really don't get where Alpha is involved, pls help. Thanks

    asked by barty
  177. Math

    I'm confused.Can someone tell me if I have done this correct.I'm trying to get the average using a weighted scale: TOTAL GRADES: WEIGHT 90% ---------- 5% 100% ---------15% 95% --------- 15% 90% -----------5% 94.5% --------60% I multiplied the total grade

    asked by Sue
  178. Number Theory

    How Do you expand (4x+3y+3z)^6?

    asked by Tay
  179. English-Edit

    Could someone please edit this for me, and point out all grammatical errors. Thank you very much in return My assignment is connected to this poem and is down below. I made some changes as well. :-) Mr. Henry Axhelm Math Period 2, Room 107 I teach five

    asked by Sara
  180. Number Theory

    Can someone help me with this question How many integers from 1 to 10000 inclusive, are multiples of 2 and 5?

    asked by Tay
  181. algebra

    Two questions actually. Please only respond with step-by-step answers. Feel free to change the numbers, I just need to know how to do it... 1.) Factor Completely: 4a^2 + 81 - 36a 2.) In a right triangle, find the length of the side not given. b= 2 c= sqrt.

    asked by Jenny
  182. Contemporary World History

    Why did it take until 1932 for Saudi Arabia to obtain its independence?

    asked by Charles
  183. machanics

    can u tell me what formula i should be using to answer this question? If a stone falls past a bird on a ledge moving at 4 m/s, how fast will the stone be movingjust before it hits the ground below 9 seconds later? A. 92.2 m/s B. 48.2 m/s C. 352.8 m/s D. 36

    asked by me
  184. algebra

    if 3/5 of a number exceeds its 2/7 by 44. find the number

    asked by sheldon
  185. math

    is 67% a rational or irrational number

    asked by nikki
  186. business math

    You invest $10,000 in Rapid Growth Funds, which appreciate by 3% per year, with yields reinvested quarterly. By how much will your investment have grown after 8 years?

    asked by Anonymous
  187. Social Studies

    Outline the various steps in the exploration of: (a) the interior of North America; and (b) the Pacific coast

    asked by Nelli
  188. Social Studies

    Outline the various steps in the exploration of: (a) the interior of North America; and (b) the Pacific coast

    asked by Nelli
  189. Chemistry

    If you dissolve 30.0 g of HF in 100mL of water, what is the concentration of H+ ions in this solution? (Can you figure out what the H+ concentration would be using the Ka value?) Ka=6.3*10^-4

    asked by Lucy
  190. grammar

    why are great numbers of students choosing to pursue their college degrees using their homw computers. Benjamin Franklin Said; A penny saved is a penny earned". This principle applies to the american and foreign online student. Today students choose to

    asked by kelly
  191. Chemistry

    How much 0.10 M NaOH (in mL) is required to neutralize 8.00 mL of the 0.10 M HC2H3O2?

    asked by John
  192. Chemistry

    is lithium thionyl chloride batteries rechargeable or disposable

    asked by Anonymous
  193. College Mathematics

    what is the solution for this problem,create three sets, set A, B, and set C by going through the items in your wallet or purse. Set A will be a list of all of these items. Create Set B, from the items in Set A that you think are essential. Create Set C,

    asked by Terrie
  194. geometry

    The Great Pyramid of Giza was built around the year 2560 BC. It was originally 481 ft high with a square base measuring 751 ft on each side. Its slant height was 611ft. Find the lateral surface area of the Great Pyramid. Round your answer to four

    asked by nicole
  195. 5th grade

    explain how you know that 5.5 is to the right of 5 1/4 on the number line

    asked by lynnae
  196. Social Studies

    I'm doing an ABC book for Medieval terms, and I have to draw a picture for each term. What could I draw for the Orthodox Church?

    asked by lea
  197. Algebra1

    The area of a playground is 221 yd2. The width of the playground is 4 yd longer than its length. Find the length and width of the playground. (Hint: Include correct units in your final answer.)

    asked by Anonymous
  198. physics

    If 3.68 m^3 of a gas initially at STP is placed under a pressure of 3.61 atm, the temperature of the gas rises to 34.2 degrees C. What is the volume? Need step by step help.

    asked by Anonymous
  199. trig

    Perform the indicated operation and simplify tan^2(theta)-3sin(theta)tan(theta)sec(theta)

    asked by Stacey Graham
  200. english

    does this sentence makes sens she flied over the mountaintop.

    asked by Emma
  201. To Writeacher

    Writeacher, I tried to change some sentences, and tried to add conjunctions in some, but I don't know if they seem to make sense.

    asked by Sara
  202. aed204

    • Create a 12- to 15-slide Microsoft® PowerPoint® presentation addressing the following points: o Explain ways to debunk three of the five gender misconceptions listed above based on the results of the peer discussion and your own University Library

    asked by scooby
  203. Trig

    How do I solve this problem? tan (30° + x)

    asked by Abby
  204. Chemistry

    An unknown gas has a density of 2.36g/L at 298K and 110 kPa. Calculate its molar mass.

    asked by Amy
  205. earth science

    the first manned mission to the moon was

    asked by Anonymous
  206. spanish

    can you unscramble amiaramtdrs?

    asked by j.c.
  207. Chemistry

    Calculate the density of carbon dioxide gas at 253K and 648 torr.

    asked by Anonymous
  208. spanish

    can you unscramble amiaramtdrs?

    asked by j.c.
  209. Algebra

    How to simplify: ((m^(-2/3))^(-1/6)

    asked by Anonymous
  210. physics

    When people sleep, their metabolic rate is about 2.6 times 10^-4/(s*kg). How many Calories does a 75 -kg person metabolize while getting a good night's sleep of 8.0 hr?

    asked by ashley
  211. psychology

    all of the following are true of gestalt therapy except

    asked by patrick
  212. geometry

    Classify the triangle as right, acute, or obtuse if the measures of its sides are 28, 46, and 53.

    asked by Matthew
  213. chemisty

    what is the name of this substance K2Cro4

    asked by ann
  214. Social Studies

    Outline the various steps in the exploration of: (a) the interior of North America; and (b) the Pacific coast

    asked by Nelli
  215. Math: please check

    There are 30 fish in a pond. We know that 13 of these fish are males, 4 of these males are salmon, and there are 8 salmon in the pond. What is the probability that a randomly chosen fish is a salmon, given that it is a male? I think they are just asking

    asked by Bart
  216. physics

    what would the speed of an observer be if a red(4.688x10^14Hz) traffic light appeared green(5.555x10^14Hz) to the observer? a) 2.219x10^8 m/s b) 4.445x10^8 m/s c) 5.548x10^7 m/s d) 8.438x10^7 m/s e) 2.890x10^6 m/s

    asked by seema
  217. Math

    Write an equivalent fraction for 3/9 and multiply or divide the numerator and the denominator by the same number

    asked by Elijah
  218. math

    what is a mode

    asked by seth
  219. physics

    When you drop a marble does all of it's potential energy turn into kinetic energy or just some of it?

    asked by Nicole
  220. Math: Is my answer correct?

    I am not sure how to do this, just guesssing. A couple has a 2/3 probability of passing on brown eyes to their children. If they have four children, what is the probability that none of the children will have brown eyes? A) 8/27 B) 1/27 C) 1/81 D) 16/81

    asked by bwb
  221. 10th grade

    2y^2*3xy^3 divided by 3x^2y^4

    asked by Shay Brown
  222. trig

    how do i set this problem up? Find tan (s + t) given that sin s = 1/4, with s in quadrant 2, and sin t = -1/2, with t in quadrant 4.

    asked by Dave
  223. begining algebra

    A cyclist traveling at a constant speed completes 3/5 Of a trip in 1 1/2h. In how many additional hours will the cyclist complete the entire trip?

    asked by me
  224. trig

    Use identities to find indicated values tan (theta)= (12/5), pi

    asked by Stacey Graham
  225. English

    I wonder if you could check the following questions and help me rephrase a few more sentences I’m not sure of. Thanks a lot in advance! 1) What historical period did the English Renaissance cover and what was it characterized by? Explain its (?)

    asked by Franco
  226. geometry-PLEASE CHECK AND HELP!!

    1. Refer to the following line m: b. Name two rays on m that have endpoint B. d. Find a simpler name for the intersection of rays BA and AC the line m has points a b and c going on across like that on the line would the answer be ba and bc? what would the

    asked by jessica
  227. Calculus

    Determine the resultant of the vector sum: 10 N at 045 degrees and then 8N at 068 degrees.

    asked by Ariza
  228. chemistry

    how many drops of 0.5M NaOH are needed to neutralize 10 drops of 1.0M HCl? What would be the pH of the neutral solution?

    asked by kristy
  229. Chemistry

    A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. Explain the chemical process

    asked by Monica
  230. English

    I forgot to include a few more sentences I would like you to check, too. 1) Pamela is embarassed at his giving her presents though she thinks there is no harm in what he said to her. She is going to put aside (?) vanity. Being a virtuous girl, she is not

    asked by Franco
  231. algebra

    write an equation of the line containing the given point and parrallel to the given line (6,-4)8x-3y=2

    asked by delores
  232. Math

    Divide and Simplify: y^2-25/7 divided by 7y+35/49

    asked by Lauren
  233. chemistry

    what volume would 8g of He at.951 atm and 25c occupy?

    asked by dan
  234. college economics

    Suppose there are two goods. The demand for good 1 is q1=a-bp1+ep2 and the demand for good two is q2=a-bp2+ep1. a and b are strictly positive, |e|

    asked by Emma
  235. math

    Alex must wrap two boxes. Both boxes are right rectangular prisms. The smaller box has a length of 12 inches. The larger box is similar to the first and has a length of 48 inches. Find the ratio of the amount of paper needed to wrap the large box to the

    asked by Hannah
  236. math-PLEASE HELP

    Answer the following questions to determine why Euler’s formula continues to hold for the polyhedron formed by cutting corners off of an octahedron, : a. For an octahedron V = , ____,F = ____, and E = _____. b. When you slice off one corner of the

    asked by KiKi
  237. algebra-Am I right so far

    Use the quadratic formula to determine the x-intercepts (if any)f(x)=2x^2=2 am I right so far? f(x)ax^2+bx+c y=ax^2+bx+c y=2x^2+2 y=0=>2x^2+2=0 =>2x^2+2=0 ax^2=2,bx=2,c=0 x=b=sqrtb^2+4ac over 2a x=(2)+sqrt(2)^24(2)(0)over2(2) x=sqrt4+4over 2

    asked by dani
  238. Chemistry

    NH3(g) + O2(g) NO2(g) + H2O(g) Consider the above unbalanced equation. What volume of NH3 at 950. mm Hg and 33.5°C is needed to react with 190. mL of O2 at 485 mm Hg and 143°C? =? mL

    asked by Megan
  239. SCI/275

    I was just wondering if anyone can help me I am having a hard time with the assignment. Like I want to know what is APA format. And can I get an example of APA format because I don't know how to do it. Also what is cition format. PLEASE

    asked by kasey
  240. alegebra

    a cellular phone company offers a contract for which the cost C, in dollars, of t minutes of telephoning is given C=0.25(t-500)+80.95, where it is assumed that t>=500 minutes. What times will keep cost between $123.45 and $146.95?

    asked by elaine
  241. geometry-PLEASE HELP

    1. Refer to the following line m: b. Name two rays on m that have endpoint B. d. Find a simpler name for the intersection of rays BA and AC the line m has points a b and c going on across like that on the line would the answer be ba and bc? what would the

    asked by jessica
  242. geometry-PLEASE HELP!

    In the figure, l is parallel to m, and m( 1) 5 60°. Find each of the following: b. m( 6) l is paralled to m. this is how the numbers are listed 2 1 3 4 6 5 7 8

    asked by jessica
  243. math

    In the formula for the volume of a pyramid, the height h is the distance measured along one face of the pyramid to the base. Is this statement false?

    asked by heather
  244. Physics

    What is a mirror ( reflective surface and back) made out of?

    asked by Emily
  245. English

    1. Are you finished cleaning? 2. Are you finished with cleaning? (Which one is correct?)

    asked by rfvv
  246. Logical, ethical and emotional appeal

    Question 12 Which of the following visual arguments contains an ethical appeal? none of the above 1 a bar chart of 2003 housing construction sales per state an advertisement for corn seed that shows a farmer and his family standing next to a tractor with

    asked by christopher
  247. Chemistry

    To what Celsius temperature must 44.5 mL of methane gas at 43.0°C be changed so the volume will be 63.0 mL? Assume the pressure and the amount of gas are held constant. I have already tried T1V1=T2V2

    asked by Megan
  248. Chicago Manual (CM) and Council of Science Editors

    Question 1 5 points Save Which of the following fields uses Chicago Manual of Style (CM) documentation? psychology history education biology Question 2 What information goes in the parentheses when using CM style numbered notes? the publishing information

    asked by christopher
  249. logarithms

    evaluate each log. Ln e^3 logbase(1/1000) expand each log. logbase5 radical41/43 logbase7 8xy^4/3z^3 logbase5 4(7radicalxy^z)

    asked by help!
  250. social science

    article summary on Social Perception and Interpersonal Behavior: On the Self-fulfilling Nature of Social Stereotypes

    asked by Debbie
  251. Chemistry

    Can somebody explain how to do this? I am stuck. I've tried solving for H+ concentration. I got .00024M and subtracted it from [OH-]. Then I solved for pOH and used that to get pH but still got the wrong answer. Somone plz explain this to me.

    asked by John
  252. Pshychology

    article summary on Social Perception and Interpersonal Behavior: On the Self-fulfilling Nature of Social Stereotypes by Snyder, Decker & Berscheid

    asked by Debbie
  253. Chemistry

    What is the pH of the solution created by combining 2.40 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HC2H3O2(aq)? Can somebody explain how to do this? I am stuck. I've tried solving for H+ concentration. I got .00024M and subtracted it from [OH-].

    asked by John
  254. math

    one hundred feet directly overhead, a plane and a dirigible start flying due east. If the plane travels three times faster than the dirigible, what is the greatest angle of sight between the two vehicles from your position? Assume the plane passes from

    asked by Yen
  255. chemistry

    A bottle containing a standard solution of KMnO4 is found to have brown stains on the inside. Why will this KMnO4 be of no further use for quantitative experiments?

    asked by red
  256. Chemistry

    How do you solve for the experimental pKa when doing a titration?

    asked by Andrew
  257. physics problem

    At body temperature the latent heat of vaporization of water is Lv = 2.26e3 kJ/kg. (a) A naked person with a surface area A = 1.55 m2 and a skin temperature = 37.3 degrees is in a sauna room at T = 82.0 degrees. The person's skin has an emissivity e =

    asked by kelly
  258. spanish

    what does te gusta mi calor perro mean?

    asked by Anonymous
  259. math

    Can someone please help me I can't figure this out Find the center and radius of the circle. (x - 4)2 + (y + 6)2 = 16

    asked by Alex
  260. Chemistry

    A)250 g of LiBr is dissolved in 200g of water 100 degrees C. The solution is then cooled to 20 degrees C. How much precipitate (if any) is formed? B) 42 g of KCl is dissolved in 100g of water at 50 degrees C. The solution is then cooled to 20 degrees C.

    asked by Jack
  261. English

    To My Valentine More than a catbird hates a cat, Or a criminal hates a clue, Or the Axis hates the United States, That's how much I love you. I love you more than a duck can swim, And more than a grapefruit squirts, I love you more than a gin rummy is a

    asked by Sara