Questions Asked on
October 12, 2013

  1. science

    I am doing a titration lab and need help with a problem. (i used .100M H2SO4)(I used 10.0 ml of Ba(OH)2 solution and added 50.0 ml of distilled water making 60.0 ml total.) 1. Use the titration results to calculate the moles of H2SO4 that were used to

    asked by Charles
  2. math models

    If $3800 is invested in a savings account for which interest is compounded quarterly, and if the $3800 turns into $4300 in 2 years, what is the interest rate of the savings account?

    asked by pamela
  3. CHEMISTRY.....AND THIS IS IMPORTANT

    2. If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25.0 L of octane vapor, C8H18? b. what volume of each product is produced? 25L C8H18 x (25 mol O2/2 mol C8H18) = 312.5 L O2 (if it were pure O2). Then

    asked by Anonymous
  4. math

    The annual budget projection for a large manufacturing firm includes: Division A $24,345,500 Division B $13,927,750 Division C $752,000 Division D $695,800 Estimate the total budget in millions of dollars.

    asked by kit
  5. Physics Urgent please help

    Consider an ideal spring that has an unstretched length l_0 = 3.5 m. Assume the spring has a constant k = 36 N/m. Suppose the spring is attached to a mass m = 8 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a

    asked by akha
  6. science

    on a winter day the temperature drops from -15c too -25C overnight. if a pan sitting outside contains 0.50 kg of ice, how much heat is removed from the ice for the temperature change?

    asked by Anonymous
  7. math

    A painter leans a 15 foot ladder against the side of a house. The top of the ladder touches the house at a height that is 3 feet more than the distance from the house to the bottom of the ladder. How far is the bottom of the ladder from the house?

    asked by ashley
  8. College probability and statistics

    The current license plates in New York State consist of three letters followed by four digits. ( i ) How many possible distinct license plates can there be? ( ii ) How many possible distinct license plates could there be if the letters O and I and the

    asked by Melissa
  9. Physics

    can someone help i'm stuck on two questions??? 23. On a velocity-time graph, when is the object not moving? when the slope is a straight line rising to the right when the slope is a straight line falling to the right when the slope is a line curving upward

    asked by Mary Ann
  10. STAT

    The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. 1)How many students would you expect to have weight between 162 pounds and 178 pounds? 2)What is

    asked by Jacky
  11. Mathematics

    Show that cos (θ-40) = sin (θ+50). Hence, or otherwise, solve the equation cos(θ-40) = sin(θ+50), giving all solutions between 0° and 360°.

    asked by WesleyCrusher
  12. physical

    A bicycle and its rider together has a mass of 95 kg. What power output of the rider is required to maintain a constant speed of 4.8 m/s (about 10.7 mph) up a 5.0% grade (a road that rises 5.0 m for every 100 m along the pavement)? Assume that frictional

    asked by laila
  13. STAT

    Assume that women’s heights are normally distributed with a mean given by µ = 64.6 inches and standard deviation given by σ = 2.2 inches. What area under the normal curve corresponds to the probability that a woman’s height is between 63.7 inches and

    asked by Jacky
  14. Pre Algebra

    The area of a square postage stamp is 81/100 in. squared. What is the side length of the stamp? What is the formula of the area of a square?

    asked by Steve
  15. physics

    An electron moving parallel to the x axis has an initial speed of 3.66 ✕ 106 m/s at the origin. Its speed is reduced to 1.40 ✕ 105 m/s at the point x = 2.00 cm. Calculate the potential difference between the origin and that point. ΔV =

    asked by smita
  16. Psychology/ Ms Sue

    Are my answers correct Ms Sue? 1. One of the characteristic features of school-age children is that they are more likely than younger children to try to conform to peer standards in such matters as clothing and language? True 2. School age children have a

    asked by Lisa
  17. physics

    An oil drop ‘B’ has charge 1.6 × 10−19 C and mass 1.6 × 10−14 kg. If the drop is in equilibrium position, let 10 k be the potential diff. between the plates. [The distance between the plates is 100 mm] Then what is the value of k.

    asked by preet
  18. Math

    Lactose (MW:342 amu) makes up the vast majority of the carbohydrate. Calculate the molarity of lactose in buttermilk and compare it to that of protein.

    asked by Abi
  19. Math Probabilities

    A survey of TV viewing habits of 50 men and 50 women found the following information: Of the 50 men, 20 prefer watching baseball and 30 prefer football. Of the 50 women, 25 prefer watching baseball and 25 prefer football. Construct a data table for this

    asked by Alex
  20. Physics

    A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30° above the horizontal. If the ground is level, what is the maximum height reached by the projectile? (A) 5 m (B) 10 m (C) 500 m (D) 1,000 m (E)

    asked by Mehrin Ali
  21. STAT

    The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. How many students would you expect to have weight between 162 pounds and 178 pounds? What is the

    asked by Jacky
  22. Chemistry

    The rate constants for a reaction are found to be k(-35 C) = 1.0 x 10-3 s-1 k(-25 C) = 2.0 x 10-3 s-1 At what temperature (in degrees C) will the rate constant be 3.79 x 10-3 s-1?

    asked by ss01
  23. Probability

    A survey of TV viewing habits of 50 men and 50 women found the following information: Of the 50 men, 20 prefer watching baseball and 30 prefer football. Of the 50 women, 25 prefer watching baseball and 25 prefer football. Construct a data table for this

    asked by Alex
  24. Math

    state the amplitude, period, frequency, phase shift and vertical shift of each function, Then graph two periods of the function of: 1) y=3 sin(x-pie/4) 2) y=0.25cosx+3

    asked by Sydney
  25. chemistry

    Aluminium is manufactured by electrolysis(electrolytic decomposition) of bauxite, Al2O3. How much aluminium can be obtained from 1kg of pure bauxite? --you have 1 mol of Al2O3 n 1 kg....I still don't get it.

    asked by LC- reply to DrBob222
  26. English

    Hi this a rebus, can you answer it? TEEXAMRM

    asked by Tim
  27. math

    A sample of 148 of our statistics students rated their level of admiration for Hillary Rodham Clinton on a scale of 1 to 7. The mean rating was 4.06, and the standard deviation was 1.70. (For this exercise, treat this sample as the entire population of

    asked by eid2013
  28. CHEMISTRY...IMPORTANT

    2. If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25.0 L of octane vapor, C8H18? b. what volume of each product is produced? 25L C8H18 x (25 mol O2/2 mol C8H18) = 312.5 L O2 (if it were pure O2). Then

    asked by Anonymous
  29. chemistry

    Aluminium is manufactured by electrolysis(electrolytic decomposition) of bauxite, Al2O3. How much aluminium can be obtained from 1kg of pure bauxite?

    asked by LC
  30. math

    Our statistics students, as noted in Exercise 6.32, were asked to rate their admiration of Hillary Rodham Clinton on a scale of 1 to 7. They also were asked to rate their admiration of Jennifer Lopez and Venus Williams on a scale of 1 to 7. As noted

    asked by eid2013
  31. econ600

    As vice president of sales for a rapidly growing company, you are grappling with the question of expanding the size of your direct sales force (from its current level of 60 national salespeople). You are considering hiring from 5 to 10 additional

    asked by rabiah
  32. Math

    A shopper asked for 50 cents worth of apples. The shopper was surprised when she received five more than the previous week. Then she noticed that the price had dropped 10 cents per dozen. What was the new price per dozen?

    asked by Chris
  33. Quantum Physics

    We will carry out some steps of the quantum factoring algorithm for N=91 (a) What is the period k of the periodic superposition set up by the quantum factoring algorithm if it chooses x=8? I.e. what is the period of f(j)=8j(mod91) (b) Using your answer to

    asked by ss01
  34. managerial accounting

    Which of the following costs is an example of a cost that remains the same in total as the number of units produced changes?

    asked by leweis
  35. Survey Math

    A survey of 240 10th grade students in a local High School found that there were 140 girls and 100 boys in the grade. Of the 140 girls, 100 preferred gym class while 40 preferred art class. Of the 100 boys, 40 preferred gym class while 60 preferred art

    asked by Alex
  36. STAT

    The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. How many students would you expect to have weight between 162 pounds and 178 pounds?

    asked by Jacky
  37. Math

    Rose has a square garden with an area of 49 square feet. She wants to put a fence around her garden. How much fencing does she need to purchase?

    asked by Brad
  38. biology

    is trypsin inhibitor competitive or noncompetitive

    asked by Cristian
  39. English

    Hi this is a rebus can you answer it? ECNALG

    asked by Tim
  40. physics

    Calculate the speed of an electron that is accelerated through the potential difference of 123 V.

    asked by smita
  41. maths

    The Number Two Plumbing Co. charges $45 per hour plus a fixed service call charge of $65. Write an equation that will allow you to compute the total bill for any number of hours, x, that it takes to complete a job. A. C = 45x + 65 B. C = 65x + 45 C. 65x +

    asked by mdan
  42. biochemistry

    ) Anthranilate fluoresces blue under ultraviolet light. Under normal conditions, the levels of anthranilate in bacterial cells are low and the cells do not visibly fluoresce. However, if anthranilate accumulates because a relevant enzyme is defective or

    asked by Anonymous
  43. math

    how many lines of symmetry does a pentagon have?

    asked by Steve
  44. physics

    a javelin thrower wished to obtain a record of throwing 100 m on a flat level ground. if he hurls the javelin at 45 degrees from the horizontal, what initial speed must the javelin have?

    asked by Joe
  45. Chemistry

    Determine the minimum potential that must be applied to a proton so that, on interaction with a hydrogen atom, it can excite the ground state electron to a state of n=3 please tell steps in brief

    asked by ss01
  46. Quantum Physics

    Suppose you are given an endless supply of qubits in the state 12√|00⟩+eiϕ2√|10⟩. To estimate the phase angle ϕ, you run Fourier sampling (i.e. Hadamard on each qubit followed by a standard basis measurement) on this state repeatedly. After

    asked by ss01
  47. Chemistry

    Which substance ( HBr or HF ) has the higher boiling point? Its HF but chose one of the most appropriate reason. 1. Both substances are nonpolar but the higher boiling includes hydrogen bonding 2. Both substances are nonpolar but the higher boiling is more

    asked by ss01
  48. math

    6.22 A study of the Consideration of Future Consequences(CFC) scale found a mean score of 3.51, with a standard deviation of 0.61, for the 664 students in the sample(Petrocelli, 2003). For the sake of this exercise, let’s assume that this particular

    asked by eid2013
  49. CHEMISTRY

    18cm^3 of 1.0M H2SO4 just reacted with 24cm^3 of 1.5M NaOH to form sodium sulfate & water. Calculate the amounts in moles of sulfuric acid & sodium hydroxide reacting & write an equation for the reaction.

    asked by Janey
  50. Quotes

    I'm doing this essay, and I would really like a few names on women who have gone to war and a couple of their quotes. Thanks

    asked by Kelsi
  51. STAT

    A researcher is examining the relationship between color preference and gender. A sample of 30 men and 30 women is obtained and each person is asked to identify his/her preference between two choices of paint colors for a new student lunge. For this

    asked by Jacky
  52. Chemistry

    Element L has an average atomic mass of 54.2488 amu and is composed of two isotopes. The first has a mass of 55.2036 amu and makes up 41.030% of a standard sample. What is the mass of the second isotope? I under how to get average atomic mass but not sure

    asked by Star
  53. MATH

    IN LOCAL TOWNS 4/5 OF THE VOTING AGE POPULATION IS REGISTRED TO VOTE 11/16 OF REGISTRED VOTERS IN ELECTION FOR MAYOR WHAT FRACTION OF THE VOTING AGE POPATION VOTED.

    asked by ROSHANDA PLUMMER
  54. Chemistry

    Assume for fluorine a relative electronegativity of xp=4.0, determine xcarbon. [Given: BEC-C=347 kJ/mol; BEF-F=155 kJ/mol; BEC-F=429 kJ/mol.

    asked by ss01
  55. English

    Hi this is a rebus, can you answer it? KNEE LIGHT

    asked by Tim
  56. Chemistry

    Which substance ( HI or Xe ) has the higher boiling point? Its HI but chose one of the most appropriate reason. 1. Both substances are nonpolar but the higher boiling includes hydrogen bonding 2. Both substances are nonpolar but the higher boiling is more

    asked by ss01
  57. Physics

    A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30° above the horizontal. If the ground is level, what is the maximum height reached by the projectile? (A) 5 m (B) 10 m (C) 500 m (D) 1,000 m (E)

    asked by Mehrin Ali
  58. Physics

    While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 61-kg person develops a power of 75 W during a race, how fast is the person running?

    asked by Anonymous
  59. maths

    Write the equation of the line passing through (0, –5) and (0, 1). A. x = 0 B. y = 0 C. y = x + 0 D. y = 6x My answer is B , am i correct

    asked by mdan
  60. Math

    The probability of pulling a heart or a red card from a deck of cards is?

    asked by Alex
  61. Algebra 2

    For the first time customers, a bank will open an account with $25 included. This bank also charges a monthly $2.95 service fee on the account. Write an equation that shows the balance B after m months, assuming no other activity is made on the account.

    asked by Kelsey
  62. Algebra

    8(v-8)-2v=-28

    asked by Tracy
  63. math

    every number greater than 2 can be written as the sum of two prime numbers. 22=3+19 or 22=11+11 write the even number from 80 to 96 adbthe sum of two primes in atleast one way.

    asked by Anonymous
  64. 7th Grade Science

    Hi, I understand the question but every vocab. word I think this is it's just not coming out right when I'm putting it all together. Question:To pass a trait on to the next generation (offspring) an organism does what? My answer is heredity, but to me when

    asked by Anonymous
  65. Chem104

    Calculate the specific heat \((\rm{J/g \; ^\circ C})\) for a 18.5-\(\rm g\) sample of tin that absorbs 183 \({\rm J}\) when temperature increases from 35.0 \(^\circ \rm C\) to 78.6 \(^\circ \rm C\).

    asked by Thobile
  66. Criminal justice

    What would be the hypothetical example of modern day burglary?

    asked by Amy
  67. Chemistry

    What is the pressure of the gas in a manometer if the height in between is 71mm and the atmospheric pressure is 761mmHg?

    asked by Chelsea
  68. Physical Science

    You are running a race and you speed up from 3 m/s to 5 m/s in 4 seconds. a. What is your change in speed? b. What is your acceleration?

    asked by unknown
  69. Physical Science

    The Earth moves in a nearly perfect circle around the Sun. Assume the speed stays constant. Is the Earth accelerating or not?

    asked by unknown
  70. physics

    A. A particle is traveling without friction up and down hills and valleys. If its initial potential energy is 6 J and its initial kinetic energy is 78 J, what is its total energy, E? E: J B. If at a later point its potential energy is -14 J, what is its

    asked by carol
  71. math

    Give three reasons why z scores are useful.

    asked by eid2013
  72. biology

    movement of water molecules across the cell membranes from hypertonic to hypotonic solution . whether it is osmosis or diffusion?. please clarify.

    asked by ramesh reddy
  73. maths2

    Test the equation for symmetry with respect to the x-axis, the y-axis, and the origin. x2 + y2 + x2y2 = 4 A. Symmetric with respect to the x-axis B. Symmetric with respect to the y-axis C. Symmetric with respect to the origin D. Symmetric with respect to

    asked by mdan
  74. maths

    they say bongani buys 1 litre of milk and drinks a quarter of it and dey wnt to knw wht fraction of the litre of milk is left,and dey say bongani offers another 3eighths of the leftover milk to his sister bongiwe n dey wnt to knw wht fraction of de litter

    asked by lesego
  75. algebra

    (x-0.2)(x+0.2)

    asked by Anonymous
  76. Biology of Environment

    Im having hard time differentiating b/w inductive and deductive reasoning. In inductive you find patterns, then you reach conclusion, in deductive you reach conclusion based on previous known facts, but i still not quite understand. I also not get the

    asked by Mohammad
  77. math

    a steamship has length of 8783/4 feet it's width at widest point is 991/2 feet how much grater is it's length than it's width

    asked by roshanda
  78. english 28

    I am writing a persuasive essay on americanization and I cant think of a thesis statement

    asked by rebecca jones
  79. math

    point a (8, -10)is reflected over the y axis. What are the coordinates of A prime?

    asked by Steve
  80. math

    Is a triangle with sides of 25,20, 15 a right triangle?

    asked by Steve
  81. Quantum Physics

    Suppose you are given an endless supply of qubits in the state (1/√2)|00>+(e^iϕ/√2)|10>. To estimate the phase angle ϕ, you run Fourier sampling (i.e. Hadamard on each qubit followed by a standard basis measurement) on this state repeatedly. After

    asked by None
  82. Language arts

    because proctor did not know the six commandment then

    asked by rrrrrr
  83. Math, Factoring

    Factor: 121x^2+110x+25

    asked by Oliver
  84. English

    He was reading about diamonds when his father entered his room. (Was he reading a book, or was he reading passage about diamonds on the Internet?)

    asked by rfvv
  85. math

    if the coefficient of x,x*x,x*x*x in the binomial expansion (1/2+x) whole raise to 2n are in AP. Show that 2nsquare- 9n +7 is equal to zero?

    asked by sandra
  86. Physics-Help Please!

    a 25gram bullet is fired upward through a .36kg block. the block goes up 17cm in the air and the bullet goes up 24m into the air. What is the initial velocity of the bullet?

    asked by Sara
  87. Math- ASAP

    Could you please help me on this problem, i'm kinda stuck on it and can't find the same base. These are exponents (9^2x-1) = 6^x Thanks for helping me! -ST

    asked by ST
  88. physics

    If you accelerate due to gravity (free fall), your acceleration is -9.8 m/s2. In some fields, particularly aviation, this is referred to as 1 g of acceleration. If you were accelerating at 2.5 g, what would be your average acceleration? If you started from

    asked by iyzi
  89. STAT

    Given a sample size of 18, with sample mean 660.3 and sample standard deviation 95.9, we are to perform the following hypothesis testing: Null Hypothesis H0 : µ = 700 Research Hypothesis H1 : µ ≠ 700 •What is the test statistics? •At a 0.05

    asked by Jacky
  90. STAT

    The score on a test are normally distributed with a mean of 75 and a standard deviation of 6. If the professor wishes to give A’s to the top 4%, what would be the cutoff score be for A’s?

    asked by Jacky
  91. algebra

    Multiply (x+3)(x-3)

    asked by Anonymous
  92. History

    can someone clarify this statement for me.. President Lincoln was a reluctant, censor closing newspapers and jailing "copperhead" editors who sympathized with the South, giving credence to the notion that war sometimes necessitates compromises of free

    asked by Blaze
  93. Chemistry

    What volume of a liquid having a density of 4.55 g/cm3 is needed to supply 10.47 grams of that liquid? Answer in cm3.

    asked by Andy
  94. Greek Mythology

    I'm doing a mini report on Athena, goddess of war, and if you have any links to help me accomplish this it would be very much appreciated. :)

    asked by unknown
  95. algebra 1

    solve the equation -2x+1=5-2x can you please show me some videos of how i can solve them

    asked by loli
  96. Logic

    Having trouble with these two 1. 1 ~J 2 (B ⊃ M) ⊃ (~J ⊃ B) 3 ~J ⊃ (B ⊃ M) / B 2. 1 ~L 2 V v (A v L) 3 (V v A) ⊃ ~V / A

    asked by Rick
  97. Physical Science

    Suppose you are moving left (negative) with a velocity of -10 m/s? What happens to your speed if you have a negative acceleration? Do you speed up or slow down?

    asked by unknown
  98. English

    1. You are out of breadth a lot. 2. You are very out of breadth. 3. You are much out of breadth. 4. How aout of breadth you are! (Which one is grammatical? Which one is similar to #4? What other expressions can we us instead of 'out of breadth.?)

    asked by rfvv
  99. physics

    The mass of an unloaded car is 800 kg. The body of the car will sink 6 cm after getting in 5 persons of total mass of 500 kg. How much is the time of period of vibration of the unloaded car and loaded with passengers?

    asked by Anonymous
  100. English

    The stolen necklace is insured for five million dollars. (What is the meaning of the role of 'for' in this sentence? What else can we use instead of 'for' ?)

    asked by rfvv
  101. Chemistry

    What are the equations for these two equations? Not net ionic equations. a) Nickel (II) chloride and iron b) Sodium and water

    asked by Matt
  102. English

    Hi this is a rebus question, can you answer it? ECNALG

    asked by Tim
  103. English

    1. So the necklace on his desk had to be the real diamond necklace. 2. So the necklace on his desk must have been the real diamond necklace. (Does #1 mean #2? What is the difference between them?) 3. He must be strong. 4. He has to be strong. (Are both

    asked by rfvv
  104. Physics

    A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30° above the horizontal. If the ground is level, what is the maximum height reached by the projectile? (A) 5 m (B) 10 m (C) 500 m (D) 1,000 m (E)

    asked by Mehrin Ali
  105. Maths

    For 2 sets X={1,2,3,4},Y={−15,0,30}, f is a surjective function from X to Y. If f(1)=−15 and f(2)=f(4)=0, what is f(3) ?

    asked by CHRIS
  106. science

    I'm doing a project on chocolate I need help how to start the project

    asked by britney
  107. science

    A decrease in “food miles” will most likely increase the environmental impact of any given food. (Points : 1) True False

    asked by Anonymous
  108. Card Probability

    The probability of pulling an ace or king from a deck of cards is?

    asked by Alex
  109. SAT MATH

    if x^2 - y^2 = 77 and x + y=11 what is the value of x?

    asked by Paula
  110. physics

    for the hydrulic lift shown,what must be the radio of the diameter of the vessel at the car to the diameter of the vessel where the force F,is applied so that a 1.52x10^3 gr car can be lifted with a force F,of just 0.125kN?

    asked by Anonymous
  111. STAT

    Lucinda used ANOVA to test if there were statistically significant differences between the five conditions of her independent variable. There were 8 participants in each condition. Her obtained F-test (df between = 4, df within = 30) was F = 10.897/3.72 =

    asked by Jacky
  112. STAT

    A certain personality index postulated by Professor Bailey is normally distributed, with a mean of 0.4 and a variance of 0.0004. What is the probability that the Professor Bailey’s personality index of a randomly selected person will exceed 0.44?

    asked by Jacky
  113. STAT

    The Cox family has 4 boys. •What is the probability of a 4-child family having 4 boys? •What is the probability that the next child of the Cox family will be a boy, given that they have already 4 boys in a row?

    asked by Jacky
  114. religion/theology

    i have to make a prayer video and i don't know what to make it about, please help! thank you

    asked by allie
  115. gc chemistry

    What affects peak shape in gc? I know peak area is proportional to the amount of a species and tailing occurs due to adsorption of polar species. Also fronting can occur if too much sample is added but these are the only things i can think of that would

    asked by Instrumental
  116. Biology of environment

    What does dynamic equlibrium population growth mean?

    asked by Mohammad
  117. algebra

    Evaluate the polynomial for x=3 and x=-3 4x^3-1/9x^4

    asked by Anonymous
  118. algebra

    multiply (-1/2y^2)-(3/5y^8

    asked by Anonymous
  119. algebra

    multiply -8x(6x^2-4x+1)

    asked by Anonymous
  120. algebra

    (a+1((a+1)

    asked by Anonymous
  121. maths

    bongani buys 1 litre of milk and drinks a quarter of it. what fraction of the litre of milk is left? bongani offers another 3 eighths of the leftover milk to his sister bongiwe what fraction of the litre of milk is left?

    asked by lesego
  122. schul projekt

    hallo,ich brauche hilfe beim projekt. ich muss reisekataloge über islas canarias -spaniens insel im atlantik recherchieren. könnt ihr mir helfen und schreib auch die internet adresse wo ihr es herraus gefunden hat danke schön

    asked by priyanka