Questions Asked on
November 22, 2013

  1. Water Treatment

    Wastewater from a small town is treated in a trickling filter which is preceeded by a screen, sand-removal and primary clarification. The maximum hydraulic capacity, or peak flow, of the treatment plant is 1,500 m3/h. The dry weather flow (Qdwf) amounts

    asked by Mara *** Please, help me*
  2. music help

    what does neumes and color lines show?

    asked by mary ann
  3. Math plz help me!!! URGENT!!

    1. Write the ratio in the simplest form. 16:24 (1 point) 1:2 4:3 3:4 2:3 2. Solve the following proportion. (1 point) p = 2 p = 8 p = 12 p = 24 3. A recipe calls for 2 cups of sugar to make 2 dozen cookies. Use the proportion to calculate how much sugar is

    asked by jhubijn
  4. Math

    how many solutions does the equation sin(5x)=1/2 have on the interval [0,2pi]?

    asked by Lizzie
  5. Chemistry

    What is the lattice energy of NaI? Use the given information below. Heat of formation for NaI = -288.0 kJ/mol Heat of sublimation for Na = 107.3 kJ/mol Ionization energy for Na = 496.0 kJ/mol Bond dissociation energy for I2 = 149 kJ/mol Electron affinity

    asked by Andy
  6. statistics

    Assume that thermometer readings are normally distributed with a mean of 0.0 and a standard deviation of 1,00. the thermometer is randomly selected and tested. For the case below, draw a sketch , and find the probability of the reading The given values in

    asked by judy
  7. math

    Many people are trying to reduce their carbon footprint. Amrita’s carbon footprint this year was 85% of last year’s footprint. If her carbon footprint this year is 34 tonnes,what was her carbon footprint last year? PLZ NEED HELP

    asked by jhon
  8. Geometry

    The two vertices that form the base of an isosceles triangle are (-5, 3) and (2, 3). What are the coordinates of the other vertex?

    asked by Mary
  9. math

    Help?Simplify each expression.1. 3w – 10w a. 13w b. –7w c. –7 d. 7w 2. y + 1.2y +1.2z a. 2.4yz b. 1.3y + 1.2z c. 1.2y2 + 1.2z d. 2.2y + 1.2z 3. 6r + r – 5r a. 2r b. 1r + r c. 0r d. 7r – 5r 4. 5x + 2(x + 6) a. 7x + 6 b. 7x2 + 12 c. 7x + 12 d. 7x

    asked by Anonymous
  10. Algebra

    Use the matrix tool to solve the system of equations. Choose the correct ordered pair. -3x + 5y = 19 5x - 5y = -5

    asked by AA`
  11. Pre-Calc Help!!!

    Prove the identity. (show your work please) tan(x − π/4)= (tan x − 1)/(tan x + 1) Thank you!

    asked by Anonymous
  12. math

    A model rocket is launched with an initial velocity of 160 ft/s. The height, h, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 160t. How many seconds after launch will the rocket be 350 ft above the ground? Round to the nearest

    asked by sydney
  13. Algebra 2

    What are the solutions of the quadratic equation? 2x^2 – 16x + 32 = 0 How do I solve this, I'm kinda new to quadratics and there confusing >.>

    asked by Bailee Morris
  14. 5th grade math

    Hannah and Francine have $120. Hannah and Peter have $230. Peter has 6 times as much money as Francine. How much money does Hannah have?

    asked by Marsha
  15. Psychology

    4 The big Five in personality theories refers to which of the following? a. a set of functional traits such as neuroticism and openness to experiences. b. the group of personality theorists who criticized Freud's theory as too sexual. c. The effect of

    asked by Steven
  16. cal

    Find the largest open intervals where the function is concave upward. f(x)= x/x^2+1

    asked by tony
  17. science

    Some constellations such as Ursa Minor, are visible in the sky year round other constellations appear for only part of the year.Explain why this happens.

    asked by victoria
  18. science

    How does a stars life begin ?

    asked by victoria
  19. science

    The half-life of uranium-235 is 713 million years. Suppose a fossil originally had 26 grams of uranium-235. A geologist had the fossil tested and found that it now has only 3.25 grams of uranium-235. Approximately how old is the fossil?

    asked by jim
  20. math

    Jennifer is setting the dinner table. She needs to set the table for 4 people, and each person needs to have an identical place setting to the other 3. She has 6 red place mats,6 green place mats, and 8 blue place mats as well as 4 maroon napkins, 3 orange

    asked by Tomas
  21. Science

    What is the order of the electromagnetic spectrum from highest to lowest energy. I got Radio, Microwave, Infrared, Visible light, Ultraviolet light, X-ray, and Gamma ray. Am I correct? If not, please help me so I can put it in the right order.

    asked by Nicole
  22. Math

    How many 2 ounce hot dogs would make a pound?

    asked by Pietro
  23. psychology

    This is an assignment" Why study psychology?". Please help me.

    asked by Anonymous
  24. physics

    Two liters of nitrogen combine with 6 L of hydrogen to form 4 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia?

    asked by Ashley
  25. math

    A printer holds 500 sheets of paper. After printing it held 210 sheets. Which equation can be used to find how many sheets were printed?

    asked by Anonymous
  26. math

    Question 50.50. Let C = 2.32 N + 34180 represent the cost (C) of raising a child to 18 years of age, on an income (N). If the cost is $120,000, what is the income? A. 37,382 B.36,991 c.36,521 35,856

    asked by bradie
  27. Math

    Find an equation of the line that passes through the points (1,6)&(2,4).

    asked by Francis Rhoen
  28. Math help please

    1. The ordered pairs (0, 1), (1, 4), (2, 16), (3, 64), and (4, 256) represent a function. What is a rule that represents this function? y = 4^x y = 4x y = x^4 y = x + 4 2. Consider the relationship between the height of a tree and time. Time would be

    asked by Charlotte
  29. chemistry-Help

    Glucose can be classified as an aldohexose. Name the following monosaccharide to indicate its carbonyl group and the number of carbon atoms. HO-CH2-C(=o)-C(H2O)-C(H2O)-CH2-OH

    asked by prity
  30. Psychology

    1 In Psychology, the study of personality focuses on: a. change. b. stability. c. external factors. d. learning factors.

    asked by Steven
  31. Physics electric potential energy difference

    A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two

    asked by Carl
  32. chemistry

    What are the values of [H3O+] and [OH−] for a solution with pH = 3.86?

    asked by Bella
  33. Please help!- Physics

    3. You travel from New Orleans, Louisiana, with the following vectors: • New Orleans à Point A: q = 180°, Δd = 483 km • Point A à Point B: q = 106°, Δd = 347 km • Point B à Point C: q = 106°, Δd = 347 km Remember: east = 0°, north = 90°,

    asked by GG
  34. Geometry

    The coordinates of the endpoints of the hypotenuse of a right triangle are (7, 5) and (3, 1). Find the other vertex. There are two possible solutions.

    asked by Samantha
  35. science

    A 5.0 kg bowling ball is rolling down the lane at 4.0 m/s. What is the kinetic energy of the bowling ball? a. 40 J b. 50 J c. 80 J d. 100 J

    asked by like
  36. Math

    Find the area between x = 9.5 and x = 23 under a normal distribution curve with μ = 20 and σ = 4 .

    asked by Jake
  37. Math

    Without adding ,write the following in standard form 70+400+2+3000+80000=

    asked by Pietro
  38. algebra 1

    can somebody help me please!

    asked by nicki
  39. algerbra 2

    This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

    asked by malik
  40. math

    Andy had 20% fewer marbles than Henry.When Andy gave 80 marbles to Henry, the number of marbles he had left was half of what Henry had. How many marbles did Andy have in the beginning?

    asked by Please Help! :)
  41. Social Studies

    I am so sorry about posting again but I still don't understand the social impact the airplane made at the time when it was invented...

    asked by Katy
  42. physics

    Suppose that the range of output frequencies is from 47.4 Hz to 14.8 kHz for a pipe organ. Take 343 m/s for the speed of sound. (a) What is the length (in units of m) of the longest pipe open at both ends and producing sound at its fundamental frequency?

    asked by anne
  43. algebra 1

    Material cost equation : 30x + 2y = 200 Profit equation : 100x + 5y = 400 B. Explain your inequalities and explain why x

    asked by malik
  44. TCCD

    Thirty five percent of adult americans are regular voters. A random sample of 250 adults in a medium size college town were surveyed, and it was...Estimate the true proportion of regular voters with 90% confidence and comment on the results.

    asked by AB
  45. English

    1. It is neither hot nor warm. (In this sentence, what does 'nor' mean? Does 'nor' mean 'and - not'?) 2. I don't like pears. - Me neither. - The same to me. - I don't like pears, either. - I don't like them, either. (Are the answers all grammatical?)

    asked by rfvv
  46. English

    1. I like chestnuts. - So do I. - Me too. - I like chestnuts, too. - Me, too. (Are the answers all the same? Do we have to put 'comma' before 'too'?)

    asked by rfvv
  47. general

    Please help me, whoever, telling me about how to write an assignment _ i.e. teachers' assignments for their students. Thanks so much for your answers.

    asked by Cambodian student
  48. Algebra

    What is the solution of the linear-quadratic system of equations? {y = x^2 + 5x - 3 {y - x = 2 So confused about how to do this any help is appreciated.

    asked by Samantha Taylor Greenfield
  49. physics

    The pressure in each of your car tires is 1.80 105 Pa. The mass of your car is 1660 kg. Assuming that each of your tires bears one-quarter of the total load, what is the contact area of each tire with the road?

    asked by Ashley
  50. science

    what is a convex mirror? what happens when a diverging beam incident on a convex mirror?

    asked by amulya
  51. electricity and magnetism

    A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2? What is the magnitude of the torque

    asked by Jason
  52. electromagnets

    A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two

    asked by Jason
  53. chemistry

    Acids and Bases: What would be the pH of a solution made by adding 16.9 grams of hydrochloric acid to 2.50 L of water?

    asked by Marinas
  54. Math

    The larger of two numbers is twice the smaller number. The sum of their reciprocals is 1. Find the larger number.

    asked by Francis Rhoen
  55. Math

    Write a unit rate 250 miles for 20 miles

    asked by Vanessa
  56. Chemistry

    In the titration of 20.00 mL of 0.175 M NaOH, calculate the number of milliliters of 0.200 M HCl that must be added to reach a pH of 12,55. I know the answer is 11,9 mL but I don't know how to calculate it.

    asked by Helga
  57. cal

    Find f"(x) for the function. f(x)= x^2+√x

    asked by mat
  58. Computers (internet)

    What does it mean by "How common or acceptable is plagiarism in our school community?

    asked by Nicole
  59. Science

    What does it mean, when it says "for visible light (ROYGBIV) which has the shortest wavelength? which has the longest? place all other colors in order based on their wavelength from shortest to longest.

    asked by Samantha
  60. Science

    Felipe made a toy boat out of clay, but it kept sinking in water. He changed the boat's design by making it slightly wider than before. Why did Felipe's newly designed boat float on water? A. He decreased the density by increasing the volume. B. He

    asked by Billy Jean Not Mah Lover
  61. pyschology

    Define what prototype is and give four examples of prototype for the category of 'clothing' I know a prototype is a typical member of a particular category, but i Don't know what would be examples for prototype in terms of clothing... Would be it: tshirt,

    asked by ray
  62. Calculus Area between curves

    Evaluate the definite integral: sqrt(8-2x) lower limit=-7 upper limit=0 I got -(1/3)(8-2x)^(3/2) and it was wrong. Please Help! Thanks in advance!

    asked by Kelly
  63. Science

    Calculate the % composition of H2S. Then determine the number of grams of sulfur present in 339.79 g of H2S. *I don't know how to set up the equation after I find the % composition to find the grams of sulfur. Please help!

    asked by Cassie
  64. Science

    How did Lamarck and Darwin differ in their thinking about species? A. Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism's environment. B. Darwin thought that change could

    asked by Anonymous
  65. pre-algebra

    The zero factor property; Can you help with this problem? W^2 + 4w^2 -4w=16

    asked by Barbara Passmore
  66. Geography HELP

    HOw do I explain how you would make a scale map of a room in your home.

    asked by Max
  67. science

    From the cosmic background radiation, what can scientists infer that the universe was like after the big bang ? a) very small b) hot c) the same average temperature as it is today d) cooler then it is today

    asked by victoria
  68. criminal justice

    How does prosecutorial discretion affect the overstating of laws on average sentencing?

    asked by patiance
  69. science

    which of the following possibly outcomes regarding the universe do scientists think is most likely ? a) the universe will continue to expand b) the universe has completed its expansion c) the universe will start shrinking soon d) the universe is already

    asked by victoria
  70. math

    for a store contest 4 out of every 65 people who visit the store will receive a freee dvd if 455 people visit the store how many dvds were given away

    asked by alexis
  71. math

    Please show all of your work in the space below. Please present and organized and complete solution. A garden will be made up of a parallelogram, a rectangle and a triangle. The garden must have an area of 500m square. Draw two possible gardens. Determine

    asked by jhon
  72. English II - Concluding an essay!!!

    Hi, I really need help concluding my essay on Othello. My thesis is: The worldly Emilia and Bianca create a strong contrast against the virtuous and innocent Desdemona, reinforcing the tragedy of her death and Othello's crime. What I have for my conclusion

    asked by Isabelle
  73. Business

    Why do you think there have been so many accounting scandals in recent years?

    asked by Matt
  74. history

    In the election of 1860, the _______ won the electoral votes of all the free states, except a fraction of the New Jersey votes.

    asked by Anonymous
  75. pre-algebra

    Difference and sum of cubes; please help me solve this problem; 8t^3 + y^3

    asked by Barbara Passmore
  76. contemporary math

    Question 1. 1. Natureland Garden Center buys lawn mowers that list for $679.95 less a 30% trade discount. What is the dollar amount of the trade discount? (Points

    asked by loretta
  77. law

    Why did Congress repeal the mandatory federal sentences for drug offenses in 1970?

    asked by joanna
  78. stastistics

    With n=13 and p=0.7, find the binomial probability P(9)by using a binomial probability table. If np> and nq>5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial,if np

    asked by angela
  79. FIN370

    Dharma Supply has earnings before interest and taxes (EBIT) of $500,000, interest expenses of $300,000, and faces a corporate tax rate of 35%.

    asked by Ernest
  80. English

    How does the boy feel? 1. He feels bored. 2. He feels boring. (Are both answers correct?)

    asked by rfvv
  81. magnetism help

    A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region

    asked by Carl
  82. algebra 1

    Marissa is a photographer. She sells framed photographs for $100 each and greeting cards for $5 each. The materials for each framed photograph cost $30, and the materials for each greeting card cost $2. Marissa can sell up to 8 framed photographs and 40

    asked by malik
  83. math(help)

    please help me im completely clueless------------------------------1.Of the students in Rosalie’s dance class, 29 out of 59 have participated in dance class before. About how many of her students have participated in dance class before? A.0 B.1/2 C.1 D.2

    asked by matt
  84. Chemistry

    how many oxygen molecules are in 9.1 liters of oxygen gas?

    asked by Saddie
  85. English

    1. This is Mike in the picture. (What does 'in the picture' modify in this sentence?)

    asked by rfvv
  86. Math

    Find the area between x = 9.5 and x = 23 under a normal distribution curve with μ = 20 and σ = 4 .

    asked by Jake
  87. chemistry

    Calculate the % composition of H2S. Then determine the number of grams of sulfur present in 339.79 g of H2S. *I don't know how to set up the equation after I find the % composition to find the grams of sulfur. Please help! Thanks, Bella :)

    asked by Bella
  88. Chemistry

    Calculate the % composition of H2S. Then determine the number of grams of sulfur present in 339.79 g of H2S. *I don't know how to set up the equation after I find the % composition to find the grams of sulfur. Please help! Thanks, Bella :)

    asked by Bella
  89. math

    if the manufacture from the question above charge a 4 1/2 late fee, how much would city cellular owe if they did not pay the balance by the net date?

    asked by marian
  90. Science

    How did Lamarck and Darwin differ in their thinking about species? A. Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism's environment. B. Darwin thought that change could

    asked by Anonymous
  91. Chem year one

    what is the balanced net ionic equation for the oxidation of hydrogen peroxide by permanganate ion and find out how many moles of hydrogen peroxide react with one mole of permanganate ion. would the answer be: 2MnO4^- + 6h^+ + 5H2O2 ---> 2Mn^2+ + 8H2O +

    asked by kay
  92. chemistry

    Please I need help in knowing how to solve this. I know I need to take the antilog of something but don't know what.What is the values of [H3O+] for a solution with [OH−]=1×10−5M?

    asked by chelsea
  93. language arts

    We saw the months of wicked weather, As day to painful night did turn, Waiting, huddled close together For the frozen sun’s return. Our nights were almost endless torture. Our food was gone. Our fuel was low. We came in search of grand adventure But

    asked by Kelsey
  94. pyhsis

    A man walks half of his trip by 40km/hr and ride a bicycle the rest of his trip by 60km/hr. What is his average speed

    asked by susu holic
  95. Help Please!!!- Physics

    A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting

    asked by Jacob
  96. Health (Ms. Sue)

    Summarize how genes are involved in hereditary diseases. A: Genes are involved in hereditary diseases as defective genes inherited by one or both parents is one of the causes of hereditary disease?

    asked by Anonymous
  97. Language Arts

    Hello, can someone please check my answers? :) 1. How would you describe to others a person with ambition? (1 point) someone who withdraws from his family someone who strives for success*** someone who buys anything he wants someone who moves frequently 2.

    asked by Britney
  98. physics

    Black hole in X-Ray Binary. (2.75/11.0 points) An X-ray binary consists of 2 stars with masses (the accreting compact object) and (the donor). The orbits are circular with radii and centered on the center of mass. (a) Find the orbital period of the binary

    asked by juanpro
  99. physics

    A spacecraft of mass is first brought into an orbit around the earth. The earth (together with the spacecraft) orbits the sun in a near circular orbit with radius ( is the mean distance between the earth and the sun; it is about 150 million km). (a) What

    asked by juanpro
  100. cal

    Find the integral. ∫ -10 x sin x^2 dx

    asked by mat
  101. Linguistics/English

    Hi, I need more help. I need to know if I diagrammed these sentences correctly. Edith drew some orange flowers on the side of the house. Edith......Flowers (drew,some,orange).......(On)......Side (the)...(Of)....House (the) Final:Noun, Noun, (preposition),

    asked by Student
  102. Math

    x 6, -13.4 True or false

    asked by KGK
  103. Math

    Is ordered pair a solution to the equation? y = -5;(-3,1)

    asked by KGK
  104. science

    Please help!!!! Explain how mutations in DNA may affect the traits of an individual

    asked by paige
  105. Math

    True or false Some rational numbers are integers. The radius of a circle and its circumference. Direct or inverse f(x) 0.08x^3 + 0.6x + 2.8 Rational function, another polynomial function Quadratic function

    asked by KGK
  106. physics

    A skier of mass 77.7 kg, starting from rest, slides down a slope at an angle $\theta$ of 35.7° with the horizontal. The coefficient of kinetic friction is 0.08. What is the net work, i.e. net gain in kinetic energy, (in J) done on the skier in the first

    asked by JAYZ
  107. help ??????????????????

    With respect to treating an acute myocardial infarction: Identify a drug or treatment which has the effects listed 1)Activates plasminogen to lyse the thrombus. a)Aspirin b)Warfarin c)Nitrate d)Morphine e)Tenectaplase f)oxygen 2)Helps to keep ischaemic

    asked by centya
  108. 7 grade L.arts

    1. Which of the following is not a good example of specific word choice? (1 point) A.They were stranded on the island. B.They were left on the island. C.They were ditched on the island. 2. The climax of the story's plot occurs when (1 point) A. Mr.

    asked by hiiii
  109. physics

    Black hole in X-Ray Binary. (2.75/11.0 points) An X-ray binary consists of 2 stars with masses (the accreting compact object) and (the donor). The orbits are circular with radii and centered on the center of mass. (a) Find the orbital period of the binary

    asked by juanpro
  110. Chemistry

    In a double-stranded DNA molecule, the percentage of Guanine can never be more than ___%. Why?

    asked by Alan
  111. Business Mng

    Data Protection Act a) How can an individual find out what information is stored about them? b) How can an individual ensure that any incorrect information stored is altered?

    asked by Ewelina
  112. math

    x >-13, -13 True or false x -> 6, -13.4 True or false

    asked by KGK
  113. painting

    how can you paint

    asked by katie
  114. Science~!

    Sodium is a metal and chlorine is a poisonous gas. Neither is safe to eat. However, when sodium and chlorine combine, it produces edible table salt. What can be concluded? (1 point) Table salt has similar physical properties of both reactants.*** Table

    asked by Gabby
  115. Math

    Some rational numbers are integers. True or false The radius of a circle and its circumference. Direct or inverse f(x) 0.08x^3 + 0.6x + 2.8 Rational function, another polynomial function Quadratic function.

    asked by KGK
  116. math(help)

    please help me i feel clueless. --------------------- write the sum or difference in simplest form. 1.on monday,cathy read 1/6 of her book,and on tuesday she read 2/6 of the book.how much has she read? A.1/6 B.1/5 C.1/3 D.1/2 -------------------------

    asked by matt
  117. Physics

    A fire truck attaches two fire hoses to a hydrant to fight a fire. Each hose has a diameter of 20 cm. The underground water pipe going to the hydrant has a diameter of 100 cm. In the underground pipe, the water has a speed of 2.0 m/s.

    asked by K
  118. Science

    How did Lamarck and Darwin differ in their thinking about species? A. Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism's environment. B. Darwin thought that change could

    asked by Anonymous
  119. algebra 1

    This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

    asked by nicki
  120. Science

    What is a frequency of a wavelength?

    asked by Nicole
  121. Social Studies (History)

    What was a result of the laissez-fair economic policies followed by the Federal Government between the Civil War and 1900?

    asked by Samantha
  122. math

    The graph below shows the rate of natural gas usage (in therms per day) in one household for a 30 - day period. Estimate the total number of therms used during this period. Use left endpoints and rectangles with widths of 3 days. View graph at: postimg.o r

    asked by math
  123. algebra 1

    . Marissa is a photographer. She sells framed photographs for $100 each and greeting cards for $5 each. The materials for each framed photograph cost $30, and the materials for each greeting card cost $2. Marissa can sell up to 8 framed photographs and 40

    asked by nicki
  124. Science

    What kind of electromagnetic radiation could be used to "see" molecules? A cold virus? Explain your reasoning please.

    asked by Nicole
  125. Math

    Write a number sentence using all of the given numbers and symbolos 6,9,7,5,3,=,+,+,-

    asked by Pietro