Questions Asked on
March 26, 2016


    Express tan theta in terms of cosec theta

    asked by MaThS
  2. Chemistry

    Calculate the empirical formula of Tylenol: C, 63.56%; H, 6.00%; N, 9.27%; O, 21.17%

    asked by Jamie
  3. trigonometry

    A tree is broken over by the wind. It forms a right angled triangle with the ground. If the broken part makes an angle of 60° with the ground and the top of the tree is now 20m from its base, how tall WAS the tree?

    asked by MaThS
  4. science

    you are given one litre each of 0.5 M HCL and 0.2 M HCL. How should they be mixed so as to give maximum volume of 0.4 M HCL.

    asked by mehreen
  5. math

    A factory finds out that on the average 20% of bolts produced by the given machine will be defective.if 10 bolts are selected at random from the day's production of this machine,find the probability that 1.exactly 2 will be defective. 2. 2 or more will be

    asked by farahan
  6. science help PLS

    A home gets its water from a private well. Which of the following would be the best way for the homeowner to obtain a water-quality report? A.Hire a local contractor to test the home's water supply B.Record observations made by smelling and tasting the tap

    asked by Oscar
  7. Calculus

    A smokestack deposits soot on the ground with a concentration inversely proportional to the square of the distance from the stack. With two smokestacks d miles apart, the concentration of the combined deposits on the line joining them, at a distance x from

    asked by Leanna
  8. Geography

    Whereas reapportionment adjusts the amount of political representation give to a certain geographical area, redistricting adjusts A) country, state and/or county boundaries. B) population size. C) the gerrymander. D) Federal lands. E) the geographical

    asked by Elizabeth
  9. calculus2

    When the half-life of uranium U232 92 for 74 years . What is the percentage remaining after 10 years ?

    asked by drJon
  10. Economics

    In perfectly competitive market,given cost function: C=1/3q3-5q2+30q+10 and market clearing price be 6,obtain profit maximising level of output

    asked by Katelynn
  11. English

    1. My favorite food is noodle. 2. My favorite food is a noodle. 3. My favorite food is noodles. (Which one is right?) 4. My favorite food is ramen. 5. I ate two ramens yesterday. 6. I bought three ramens at a supermarket. (Are they all grammatical? Can we

    asked by rfvv
  12. Geometry

    A plane is located at C on the diagram. There are two towers located at A and B. The distance between the towers is 7,600 feet, and the angles of elevation are given. a. Find BC, the distance from Tower 2 to the plane, to the nearest foot. b. Find CD, the

    asked by SkatingDJ
  13. Math

    A right rectangular prism is packed with identical cubes. The dimensions of the prism are given in terms of the number of cubes needed to fill the prism. length is 16 cubes wide th is 9 cubes height is 23 cubes. The side length of each cube is 1/4 inch.

    asked by Joana
  14. contempory math

    use inductive reasoning to predict the next three number in the patterns 3,4,7,11,18,29

    asked by Anonymous
  15. Algebra 1

    Solve the equation by graphing the related function. x^2-9=0 I have no idea how to do this. Please help!

    asked by Nicolette
  16. math

    Find all solutions to the equation tan(t)=1/tan (t) in the interval 0

    asked by alicia otto
  17. Science

    determine the pH of each of the following solutions: 0.0812M HCl pH 3.11*10^-4 M HI pH 8.65*10^-8 M KOH pH 0.00212M Ca(OH)2 pH

    asked by Mattie
  18. Pre Calculus

    The revenue and cost equations for a product are R=x (50-0.002x) and C= 12x+ 150000. Where R and C are measured in dollars and x represents the number of units sold. How many units must be sold to get a profit of at least 1,650,000

    asked by Destiney
  19. Chemistry

    At a certain temperature, the reaction has Kc = 5 x 108. If a reaction mixture at equilibrium contains 0.26 M of H2 and 0.087 M of Cl2, what is the concentration of HCl?

    asked by Anonymous
  20. Science

    Which of the following structures is present in both prokaryotic and eukaryotic cells? A. Golgi apparatus B. Cell membrane C. Endoplasmic reticulum D. Chloroplast I think B

    asked by AMGCSTRNBSN
  21. physics

    a handbag weighing 162N is carried by the students each holding the handle of the bag next to him. If each handle is inclined at 60° to the vertical, find the force on each students arm

    asked by jay
  22. calculas

    A buoy oscillates in simple harmonic motion y = A cos(ωt) as waves move past it. The buoy moves a total of 2.7 feet (vertically) from its low point to its high point. It returns to its high point every 18 seconds. (a) Write an equation describing the

    asked by Sagar
  23. math

    The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Cause Deaths

    asked by Chistopher
  24. math

    The coordinates of the vertices of a quadrilateral are given below . (2, 3) (8, 3) (8, 11) (11, 7) What is the area, in square units, of the quadrilateral?

    asked by Lakshmi
  25. Algebra

    Two High Schools ordered AP Chemistry text book from the same book store. A New Hampshire school has ordered 80 copies, while a Vermont school ordered only 55 copies. The store has 70 books in its warehouses in Massachusetts and 100 books in the other

    asked by Anish Panda
  26. physics 1

    A 3.50 kg ball with a velocity of 10.00 m/s collides with a stationary ball with a mass of 5.00 kg. After the collision, the first ball travels at a 42.6 degree angle from its original path, while the second ball travels at a -26.7 degree angle from the

    asked by i
  27. Chemistry

    Under certain conditions, nitrogen gas reacts with oxygen gas to form nitrogen monoxide gas. How many total electrons are transferred for each molecule of nitrogen or oxygen?

    asked by Kiana
  28. Music

    Orchestration refers to The use of dynamics

    asked by dosvh
  29. Algebra

    A train covered the distance of 400 km between A and B at a certain speed. On the way back it covered 2/5 of the distance at that same speed and then it decreased its speed by 20 km/hour. Find the speed of the train at the end of its journey from B back to

    asked by Anish Panda
  30. calc 2

    Use Euler's method with step size 0.5 to compute the approximate y-values y1, y2, y3 and y4 of the solution of the initial-value problem y' = y − 3x, y(4) = 0.

    asked by TayB
  31. Chemistry

    At a certain temperature, the reaction has Kc = 5 x 108. If a reaction mixture at equilibrium contains 0.26 M of H2 and 0.087 M of Cl2, what is the concentration of HCl?

    asked by Em
  32. Math

    Points J and K, plotted on the coordinate grid, are two vertices of rectangle JKLM. Rectangle JKLM has an area of 7 square units. Point J is located at (2, 1) and point K is located at (-5,1) each vertex of the rectangle is located at a point that has

    asked by Emily
  33. physics

    An electron is traveling at 1% the speed of light. what is its kinetic energy in joules? (Speed of light= 3x 10 to the exponent of 8 m/s) a. 4.000 x 10-18 (exponent of -18) b. 4.098 x 10 (exponent of -18) c. 4.098 x 10 (exponent of 10) d. 4.000 x 10

    asked by pub
  34. Science

    In a certain plant, red flower color(R) is dominant over white(R). if a plant heterozygous for red flower color and one with white flower are crossed, which of the following would be the expected proportion of individual in the next generation? A. 4/4 red

    asked by AMGCSTRNBSN
  35. Science

    Which of the following statements best explains the relationship between the mitochondria and the plasma membrane? A. The mitochondria makes proteins that become a part of the plasma membrane. B. The mitochondria makes a gas that the plasma membrane uses.

    asked by AMGCSTRNBSN
  36. Science

    An individual suffers severe blunt trauma to the thoracic cavity. Which of the following organs are at greatest risk from this injury? A. Heart and lungs B. Liver and stomach C. Brain and spinal cord D. Large and small intestines I think A

    asked by AMGCSTRNBSN
  37. Science

    Which of the following tissues would send a message to the brain indicating that someone has touched something hot? A. Epithelial tissue B. Nervous tissue C. Muscle tissue D. Connective tissue I think a

    asked by AMGCSTRNBSN
  38. Science

    Which of the following is the pH when the concentrations of hydrogen ions and hydroxide ions in an aqueous solution are equal? A. 14 B. 7 C. 1 D. 0 I think 1

    asked by AMGCSTRNBSN
  39. Statistics

    An IQ is measured with scores that range from 0-200. The means is 100, the standard deviation is 15. Suppose you choose an SRS of 9. What is the probability that the sample will have an average IQ between 105 and 115?

    asked by Jessie
  40. Science

    Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules I think A

    asked by AMGCSTRNBSN
  41. Physics

    train moving with speed 72 km h−1 emits a whistle of frequency 600 Hz. A person is standing stationary on the platform. Calculate the frequency heard by the person if the train (i) approaches and (ii) recedes away from the listener.

    asked by Komal
  42. math

    A standard deck of has 52 cards, and contains 13 cards of each of the four suits: diamonds, spades, hearts, and clubs. What is the probability that you choose a spade, given that you have already chosen a diamond (and have not replaced it)?

    asked by Fallon
  43. calculas

    consider the following. Function y = cos 3x point (pi/4, -square root of 2/2) (a) Find an equation of the tangent line to the graph of f at the given point. (Let x be the independent variable and y be the dependent variable.)

    asked by Sagar
  44. mathematics-cubic equation

    . solve the cubic equation 2x^3-11x^2+18x-8=0 show workings #thanks

    asked by P1
  45. math

    A factory finds out that on the average 20% of bolts produced by the given machine will be defective.if 10 bolts are selected at random from the day's production of this machine,find the probability that 1.exactly 2 will be defective. (this question is

    asked by farahan
  46. Physics

    A pan filled with hot food cools from 94°C to 86°C in 2minutes when the room temperaturs is at 20°C .How long will it take to cool from 71°C to 69°C ?

    asked by Eddie
  47. College Physics

    At what temperature is the root-mean-square speed of nitrogen molecules equal to the root-mean-square speed of hydrogen molecules at 126 oC? (Hint: The molar mass of hydrogen atoms is 1.008 g/mol and of nitrogen atoms is 14.007 g/mol. The molar mass of H2

    asked by Desperate Student
  48. physics

    A force of 80N acts on a body initially at rest and moves 72m in 6s. If the force is removed after 6s calculate how far the body moves after 6s

    asked by jay
  49. Geography

    Are the borders of India (suuch as China, Nepal, Bangladesh, and Burma) related to culture (ethnic boundary) or more related towards physical features? I'm not sure how I can tell

    asked by Anonymous
  50. math

    At the end of Summer, Puss discovers that his radiator antifreeze solution has dropped below the safe level. If the radiator contains 4 gallons of a 25% antifreeze solution, how many gallons of pure antifreeze must he add to bring it up to a desired 50%

    asked by Anonymous
  51. Chemistry

    What is the salt most likely to be formed at the junction of the Fe2+ions and SiO4+

    asked by Eliza
  52. Chemistry

    What is the pH of a solution obtained by adding 15 g deK2SO4em 150 ml NaHSO4 with Molarity of 0, 2 m. HSO4 Ka = 1, 3.10^-2

    asked by Arya
  53. physics

    A 1,500-kg car stands on a square platform, and a 25-kg boy stands on another square platform. These platforms are the two caps of a large oil-filled container. What must be the ratio of the platform sides (large/small) for the boy to gently lift the car?

    asked by Dylan
  54. physics

    Freshwater (𝜌 = 1,020 kg/m3) is flowing in a horizontal pipe whose cross section widens from 9.0 cm2 to 13.0 cm2. The water speed at the wide section of the pipe is 1.25 m/s. What pressure difference (absolute value) is there between narrow and wide

    asked by Morgan
  55. physics

    Two equally long 12-cm diameter pipelines have the same pressure difference between ends. One carries a ‘Type A’ oil (𝜂 = 0.091 Pa s) and the other a ‘Type B’ oil (𝜂 = 0.064 Pa s). If ‘Type A’ oil flows at 0.14 m3/s, at

    asked by David
  56. math

    find all solution to the equation 3 cos(x+4)=1. in the interval of 0

    asked by alicia otto
  57. English

    I have to write a point form outline for a short story... i need to start with a flashblack but not sure how? the topic: Your main character is an easy going 74-year old woman. The story begins in a doctors surgery. Your character is determined to get to

    asked by Rose
  58. Simple Geography

    The provisions of the United Nations Conference of the Law of the Sea (UNCLOS) give coastal countries navigational and economic sovereignty over which of the following zones? A) 200-nautical-mile exclusive economic zone B) Export processing zone (EPZ) C)

    asked by Elizabeth
  59. english

    from the passage we learn that these rare species are specifically located in the Okawvango Delta in the north of Botswana. They also disliked by farmers as they are very harmful and could physically injure them eventually these species are shot this is

    asked by hello
  60. Statistics

    why using the t statistic may be an appropriate alternative to using a z-score

    asked by Ninoska
  61. math

    i am a 3 digit number the sum of my digits is 10 my first digit and my last digit are the same one of my factors is 7 what number am i? A 181 B 262 C 343 D 505 CHOOSE ONLY ONE!!

    asked by jennifer
  62. English

    How can you write a great conclusion?

    asked by Boberto
  63. Chemistry

    0.573 g of calcium chloride reacts with excess of 0.5 M Na3PO4 to form .523 g of isolated calcium phosphate precipitate. Determine theoretical yield, actual yield, and percent yield for this reaction.

    asked by Kiana
  64. Physics

    Particle 1 of mass 3m initially moving with a speed v0 in the positive x-direction collides with particle 2 of mass m moving in the opposite direction with an unknown speed v.After collision,particle 1 moves along the negative y-direction with speed v0/2

    asked by Divya
  65. Engish

    Despite brawls caused by drunken fans, it is virtually impossible to eliminate alcohol from baseball stadiums. A major reason is that the key sponsors of baseball games are beer manufacturers such as Coors, Miller, and Busch. This is a Cause and Effect is

    asked by jennifer
  66. Physics

    In Europe, the standard voltage is 230 V (rms), AC, and 50 cycles/s. Suppose you take your 5.00 W electric razor to Rome and plug it into the receptacle (with an adapter to fit the receptacle but not to change the voltage). (The standard voltage in the

    asked by Alyssa
  67. English

    I need help for Habit 4 Think Win-Win summary please help

    asked by Anonymous

    4. REVIEW: Let f(x) = 2^x and g(x) = √(x − 7). Find and simplify completely. a. )( f(3+h)-f(3) )/8h b.) (g ◦ f)(5) / (f ◦ f)(3)

    asked by JB
  69. English

    What are the similarities and differences between having 1 vendor and multiple vendors in a school cafeteria.

    asked by Anonymous
  70. Statistics

    Use the following information to answer the following questions. IQ is measured with scores that range from 0-200. Thea mean is 100 and the standard deviation in the population is 15. What is the probability that a randomly chosen person has an IQ of 115?

    asked by Jessie
  71. Applied Physicd

    An object moving with a constant accleration travels distance of 20m and 24m respectively in 3rd and 4th second of its motion. Find the initial velocity and the accleration of an object

    asked by Anonymous
  72. Applied Physics

    An object moving with a constant accleration travels distance of 20m and 24m respectively in 3rd and 4th second of its motion. Find the initial velocity and the accleration of an object

    asked by Anonymous
  73. precal

    If = 38° and y = 42 cm, what is the value of z to the nearest tenth of a centimeter?

    asked by jay
  74. Physics

    The steady-state amplitude of a weakly damped forced oscillator is given by 2 2 2 2 2 2/1 0 0 [( ) 4 ] ( ) ω −ω + ω ω = b f a Depict it as a function of frequency and obtain expression for resonance frequency. Also obtain expression for peak value of

    asked by Komal
  75. Physics

    sound wave of frequency 166 Hz travels with a speed 332 ms−1 along positive x-axis in air. Each point of the medium moves up and down through 5.0 mm. Write down the equation of the wave and calculate the (i) wavelength, and (ii) wave number. How far are

    asked by Komal
  76. Physics

    The activity of a sample of 31Si (T1/2 = 9.43×103 s) is 7.88×105 decays per second. What is the mass of sample present?

    asked by Peter
  77. Math


    asked by Sanjay
  78. Physics help me guys

    An aricraft carrier has a mass of 8.6*10^7 kg and can cruise at 80 km/h. a) What is the work required to stop it? B) If only half of the work required to stop it is done, what is its final speed in km/h For a) I found 2.123*10^10 which is the right answer

    asked by LEXIMAHO
  79. Physics

    At the start of your throw of a 5.6-kg bowling ball, your arm is straight behind you and horizontal (Figure 1) . Your arm is 0.64 m long, has a rotational inertia of 0.48 kg⋅m2 and has a mass of 3.5 kg with its center of mass 0.28 m from your shoulder

    asked by Cosmo
  80. Math

    What is the probability of choosing a red or blue gum ball from a bag that contains 14 red, nine blue, and 12 green gumballs.

    asked by Gina
  81. maths

    Construct a table of values for -4_

    asked by Haisy Omai Gama

    I did a lab on the colorimetric determination of iron concentration and I'm not sure how to convert fe conc into ppm. For example, how would i convert 0.6 ug/ml to ppm?

    asked by aly
  83. maths

    Construct a table of values for -4_

    asked by Haisy Omai Gama
  84. Math

    Ann is x years old and her sister is 2 years older. If the product of their ages 80. Form an equation in x and solve to find the age of each. ______________________________________ I got up to, x + 2x = 80 x + 2x - 80 = 0 and now im confused... this is for

    asked by Luna
  85. English

    What do you mean by that? What do you mean "lunch is on me"? ===================== There are a lot of meanings of 'by.' What is the meaning of 'by' in the two sentences?

    asked by rfvv
  86. economic

    The cost and consequence of providing the subsidies and welfare

    asked by innocent
  87. maths

    A Shopkeeper bought a cassette for Rs40 and sold it for Rs55. (a) what was his profit? (b) Express the profit as a percentage of.the cost price.

    asked by sonali
  88. math

    A store owner receives 12 computers:nine are model A and the rest are model B.if two computers are sold at random,find the probability that one of each model is sold

    asked by farahan
  89. English

    1. I'm very glad to hear that because I love bulgogi! 2. I'm very glad to hear that because I love Bulgogi! ----------------- Do we have to use 'bulgogi' or 'Bulgogi'? (bulgogi:A Korean dish made from sliced beef that has been marinated in soy sauce,

    asked by rfvv
  90. math

    An insurance sales representative selects three policies to review.the group of policies he can select from contains eight life policies,five automobile policies and two homeowner's policies.find the probability of selecting: I.all life policies. II.both

    asked by farahan
  91. math

    A council consists of 10 members.four are NDC,three are NPP and three are from other parties.if a committee of three is to be selected,find the probabilities following: of each party. II.Two NPP and one from other parties. from other parties

    asked by farahan
  92. physics

    the age of jane and john add up to 25years.8years ago jane was twice as old as old are they now?

    asked by lucy
  93. mathematics

    the age of jane and john add up to 25years.8years ago jane was twice as old as old are they now?

    asked by lucy
  94. math

    Phil is making a number cube out of cardboard . He traces one face of the number cube onto a coordinate grid . The coordinates of two opposite vertices of the face are (4, 8) and (12, 16) . What is the surface area, in square units, of Phil’s entire

    asked by Lakshmi
  95. Math

    A bus travels 400 Miles in 8 hours how many miles will the bus travel in 2 days

    asked by Kris
  96. chemistry

    Explain using dilution formula how to prepare 0.2M hcl acid from 37% concentrated hcl acid

    asked by precious
  97. Geography

    14. Which of the following would NOT be an example of a core country? * Canada Sweden Japan Spain Iceland E?

    asked by Anonymous
  98. College Physics

    If a certain amount of ideal gas occupies a volume 9.5 m3 with a pressure of 3.1 atm and temperature 5.4 oC on earth, what would be its volume on another planet, where the temperature is 5.3oC and the pressure is 7.4 atm ? The answer is in unit of m3

    asked by Desperate Student
  99. College Physics

    A welder using a tank of volume 1¡Ñ10−2m3 fills it with oxygen (with a molar mass of 32.0g/mol ) at a gauge pressure of 1.4¡Ñ105Pa and temperature of 37.0∘C. Find the initial mass of oxygen. R=8.314m3PaK-1mol-1. The answer¡¦s unit is g.

    asked by Desperate Student
  100. Physics

    A man is 2m50cm standing in front of a vertical mirror at a distance of 3cm,if the mirror is rotated from is initial velocity through and angle of 50degree? 1.determine the size of the image of the man? far from the man is the image? 3.what is the

    asked by Nobility
  101. physics

    why is it cold in winter and hot in summer basing on physics knowledge

    asked by lucy
  102. physics

    state or law which explains why a ship can easily sink than overturn?

    asked by lucy
  103. Science

    determine the pH of each of the following solutions: 0.0812M HCl pH 3.11*10^-4 M HI pH 8.65*10^-8 M KOH pH 0.00212M Ca(OH)2 pH

    asked by Mattie
  104. physics

    explain the physics principle why the size of tree stem decreases upwards?

    asked by lucy
  105. physics

    explain the physics concept to why a ship sounds when moving in water?

    asked by lucy
  106. Geography

    For my project, it asks me to find 4 political maps of India from 1850, 1920, 1947, and 2010. After that, it asks me to write an essay explaining the historical map analysis. How do I do that from political maps?

    asked by Anonymous
  107. Chemistry

    Balance the following redox reaction occurring in an acidic solution: ClO4^-+Br2=Cl^-+BrO3^- I get the two half reactions balanced as: 6e^-+(8H^+)+ClO4^-=Cl^-+4H2O and 6H2O+Br2=2BrO3^-+(12H^+)+10e^- Then I multiply the top equation by 5 and the bottom

    asked by Carol
  108. chem

    A gas has a pressure of 5.7ATM at 100.0 C what is the pressure at 20.0 C? (assume voulme is unchanged)

    asked by olivia
  109. English

    In act IV,Scene 1 of Romeo and Juliet, two days before her scheduled wedding to Paris Juliet tells Friar Lawrence all the things you would rather do than marry Paris. which of the following lines from her monologue foreshadow the outcome of the play? A."O,

    asked by GummyBears16