Questions Asked on
November 25, 2015

  1. Ciencias

    ocasionalmente los hospitales tienen brote de infecciones por la bacteria estafilococos la cual reciste el tratamiento con antibiótico que una vez fuera efectivo. ¿cual es la explicación más aceptable para esta situación?

    asked by Lucy
  2. math

    The marginal cost of production (in Rs) is 3 + x/3000 + e^(-0.03x), where x denotes the number of units. The cost of producing 100th unit is:

    asked by asad
  3. Science

    Why the átomo never seen before

    asked by Lucy
  4. Chemistry

    1.)An ammonia/ammonium buffer solution contains 0.35 M NH3 and 0.72 M NH4+. The Kb value of ammonia is 1.8×10−5. Calculate the pH of this buffer. 2.) Nitrous acid has a Ka of 4.5×10−4. What is the pH of a buffer solution containing 0.15 M HNO2 and

    asked by LuigiR
  5. English

    Agnostic: Religous:: Salesperson:Persuasive Secretary: telephone Hermit:social corn: crop For each item, figure out the relationship between these two words? Can you help explain this to me

    asked by jennifer
  6. Maths

    The temperature is shown at 6:00am. It is rising at one degree every thirty minutes. At this rate, it will be 20 degrees at what time?

    asked by Claudia
  7. English

    Can you explain to me how to do this Each item below starts with a pair of words in CAPITAL LETTERS. For each item, figure out the relationship between these two words. Then decide which choice of the choices (A, B, C, or D) expresses a similar

    asked by jennifer
  8. English

    can u guys help me add some adverbs (6 or 10) to this story that i summarized thanks in advance!! (^_^): Black, cloudy night-time hung over the backdrop of the house. The grey, ramshackle walls of the house looked worn and forbidding, and the dilapidated

    asked by brett
  9. math

    15/box is a fraction that lies between 1/7 and 1/8. what is the missing whole number in the box?

    asked by kima
  10. math

    A company produces x units of output at a total cost of 1/3 x^3 – 18x^2 + 160x. Output at which average cost is equal to marginal cost is:

    asked by honey
  11. Maths

    Mr Gosh purchased wrist watches worth Rs 60000. He sold one-third of them at a profit of 20% and remaining at a loss of 5%. Calculate his overall profit or loss percentage.

    asked by Anuja
  12. chemistry

    explain how you would obtain solid lead carbonate from a mixture of lead carbonate and sodium carbonate powder

    asked by diane
  13. Physics

    How does using the concept of resonance determine the speed of sound an in experiment? In other words, I'm wondering how the concept of resonance works

    asked by Emma
  14. Physics

    In this sound interferometer, sound waves enter at A and travel to C via paths ABC and ADC. the intensity of the sound can be determined by the microphone placed at C. The length of the path ADC can be changed by a sliding tube. The frequency is fixed at a

    asked by Claudia
  15. math

    seven years ago, Mary was 6 times as old as Cora, In 1 year, she will be only twice as old as Cora. Find their present ages

    asked by Nyx
  16. math

    Jade's age now is the same as Timmy's five years hence. Timmy's age six years ago was half Jade's age now. Find the present age of each.

    asked by Nyx
  17. Mathematics

    A number is 8 more than another number. The product of these two numbers is 20. Find the numbers.

    asked by Carah
  18. physics

    formular for looking maximum speed reached

    asked by mohamed
  19. PHYSICS

    a 72N force accelerates mass m, by 5.0 m/s^2 the same force acts on another mass m2 and imparts to it an acceleration of 20.0 m/s^2. what acceleration will the same force impart to the two masses when they are joined?

    asked by Camz
  20. electron theory and ohms law

    what voltage must be applied to a 6.4-ohm lamp filament to develop 20 amperes of current?

    asked by roland
  21. Physical

    At t = 0 s time a stone is thrown from the top of a cliff above a lake. Another stone is thrown down from the same point , 1.6 s later , with a initial velocity of 32.0 m / s. The two stones hit the water in one instant. Determine the cliff height.

    asked by Michel
  22. electron theory and ohm law

    if the 5-ohm heater in problem 15 is placed with a 15-ohm heater, what current will the 15-ohm heater draw from the same power supply?

    asked by roland
  23. math

    Air is pumped into a spherical balloon at the rate of 20cm^3/s^-1.find the rate of change of radius of the balloon when the radius is 6cm

    asked by charles
  24. derivrtives

    Find the derivative of d^2Y/dx^2 of y=e^2t and x=cost^2 and leave your answer in terms of x and y

    asked by charles
  25. physics

    water and glass with refractive index of 1.5 are interfaced.if the incident ray are from the water makes an angle 60 degrees with the normal.find the direction of the reflected and refracted rays(given that refractive index of glass to water=1.33)

    asked by joe
  26. physics

    Shows three boxes connected by cords, one of which wraps over a pulley having negligible friction on its axle and negligible mass. The mass of the boxes are mA = 5 kg, mB = 2 kg, and mC = 3kg. When the system is released from rest, Calculate (a) the

    asked by Jay
  27. calculas

    airplanes fly from left to right along the path y=1+(1/x)and can shoot their bullets in the tangent direction at creatures placed along the x-axis at x=1,2,3,4 and 5.determine whether a creature will be hit if the player shoots when the plane is at p(1,2)

    asked by khalid
  28. Physics

    Draw areal velocity versus time graph for Mars.

    asked by Akshay
  29. Math

    I am the product of 135 and decreased by 500. who am I?

    asked by marcus
  30. Algebra

    A page of print containing 144 square centimeters of printed region has a margin of 4 and 1/2 centimeters at the top and bottom and a matgin of 2 centimeters at the sides. What are the dimensions of the oage if the width across the page is four units of

    asked by Arnee
  31. Algebra

    A rectangular box is to be made from a piece of cardboard 6 cm wide and 14 cm long by cutting out squares of the same size from the four corners and turning up the sides. If the volume of the box is to be 40 cm^3, what should the length of the side of the

    asked by Arnee
  32. Education

    How are the “image of the child” and the “image of the teacher connected"?

    asked by Travis
  33. algebra

    The length of a rectangle is 5cm more than twice the width. The perimeter of the rectangle is 34 cm. Find the dimensions of the rectangle.

    asked by ehdz
  34. algebra

    The length of a rectangle is 5cm more than twice the width. The perimeter of the rectangle is 66 cm. Find the dimensions of the rectangle.

    asked by ehdz
  35. Physics

    a 0.15 kg sample of Alloy is heated 540°C. it is then quickly placed in 400 g of H2O at 10°C which is contain in a 200 g aluminum cup. the final temperature of the mixture is 20. 5 °C. calculate the specific heat of alloy.

    asked by Gelo
  36. Jenna

    Write the correct form of ipse as it would be translated in the sentence. 1) The Roman boys themselves were accompanied to school by a paedagogus 2) I saw the girls themselves in the Forum Romanum. 3) I give heartiest accolades to Caesar himself. 4) By the

    asked by Latin II
  37. french

    Could you translate this question so I know what its asking? Tu trouves dix euros. Qu est-ce que tu as?

    asked by jordan
  38. English

    Do you agree or disagree with the statement children should begin studying a foreign languages as soon as they start school

    asked by Grammar
  39. English

    In "The Secret Life of Walter Mitty" the wife's character is most developed by A. expostion. B. her thoughts. C. Walter's words. D. her dialogue with Walter.**** Thank you

    asked by BUBBLES
  40. English

    We are reading the short story Superstitions out of the book "GreatBooks Roundtable". I am being test on a few questions and need some help! After her conversation with her mother, Frances most likely feels what? a) informed b) frightened c) comforted d)

    asked by Victoria
  41. HEALTH PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    1. The functions of the respiratory system are (select all that apply) A. to pump blood to your body B. to deliver oxygen to the body C. to remove carbon dioxide from the body D. to absorb nutrients 2. The dome-shaped muscle that lies below the lungs and

    asked by goldensparklegirl222
  42. help fast fast

    analyze how islam spread among southeast asia trade routes

    asked by shynice
  43. Mat 300/statistics

    In how many ways can a committee consisting of 2 faculty members and 3 students be for there are 11 faculty members and 14 students eligible to serve on the committee?

    asked by Cindy
  44. Chemistry

    A sample of air was passed through an electrical discharge causing the following reaction N2(g) + O2(g)->2NO(g) . Assuming that 1.00 mole of air (78% N2, 21% O2) was originally present at 1.00 atm, determine the partial pressure (in atm) of NO at

    asked by Anonymous
  45. Physics

    Three charges are located along the x axis as shown in the drawing. The mass of the -1.2 uC is 4.0×10^-9 kg. Determine the magnitude and direction of the acceleration of the -1.2 uC charge when it is allowed to move if the other two charges remain fixed.

    asked by John
  46. Calculus 1

    Use a graph to give a rough estimate of the area of the region that lies beneath the given curve. Then find the exact area. y = cube root(x) , 0 ≤ x ≤ 27

    asked by TayB
  47. Calculus 1

    Use a graph to give a rough estimate of the area of the region that lies beneath the given curve. Then find the exact area. y = x^−3, 2 ≤ x ≤ 5

    asked by TayB
  48. Ashworth

    Why are many fad diets considered unhealthy?

    asked by melisa
  49. English/ Could you please verify my answer

    1) WHICH OF THE FOLLOWING IS A COMPOUND SENTENCE? a) Butterflies and hummingbirds feed on the nectar of flowering plants. b) Because fraud is so common is some corporations, regulatory agencies are overworked. c) Because Viceroy butterflies migrate over

    asked by Basti
  50. Physics

    In a container of negligible mass, 0.100 kg of steam at 110°C and atmospheric pressure is added to 1.00 kg of water at 20.0°C. (a) If no heat is lost to the surroundings, what is the final temperature of the system? (b) At the final temperature, how many

    asked by Margret
  51. maths

    Help me on these questions! 1. The teacher's bill for €15 worth of copies and 8 English workbooks was €35. What did each workbook cost? 2. Patrick spent 30% of his money on a football and 60% of it on football boots. If Patrick had €3 left, how much

    asked by liam
  52. maths

    Helpp mee!!! I'm really stuck so I need help. Teresa has three times as much money as Rita. Between them they have €10. How much has Teresa?

    asked by hazel
  53. entrepreneurship 1

    My own bakery, but I don't know what to put for demographics, pyschographics, or buying pattern? Demographics: women 15-48 years(we accept everyone but i believe this is my topic consumer),...... pyschographics: family oriented, someone who cares about

    asked by anonymous
  54. Geometry 1 question

    A(-3,3) ---> A' is a glide reflection where the translation is (x,y) (x+5,y), and the line of reflection is y=1. What are the coordinates of A'? (2,-3) (-3,5) (5,1) (2,5) ---> is an arrow. I am not good on glide reflections and I'm very stuck on this one:(

    asked by SkatingDJ
  55. which of these actions would most help a worker im

    which of these actions would most help a worker improve their productivity? A: Finding a new job in a different field. B: Taking a training course related to her job. ****** C: Buying a laptop computer for home use. D: asking her employer to give her a

    asked by Ashley
  56. Geometry

    A dilation has center (0, 0, 0). Find the image of the point (-1, -2, 0) for the scale factor of 3. Please help? Thanks

    asked by SkatingDJ
  57. Pre Calculas

    If you deposit $5,000 in an account that pays 5% interest compounded annually, how much money will you have in your account at the end of 15 years? Write an exponential function that represents this situation. I got 1,500,000 but im not sure if i did it

    asked by Ryan
  58. Algebra

    Steve made a business trip of 254 miles. He averaged 57 MPH for the first part and 56 MPH for the second part. If the trip took 4.5 hours, how long did he travel at each rate?

    asked by Matt
  59. Statistics

    3. For the following data set, the dependent variable {response) is the first variable. Choose the independent variables {predictors) as you judge appropriate. Use a spreadsheet or a statistical package (e.g., SPSS or SYSTAT or MIN1TAB) to perform the

    asked by Shikha
  60. Social Studies

    What does this graph suggest about the costs and benefits of balancing the budget? I have a bar graph that shows the following data: The title of the graph is "How Americans Want to Balance the Budget". Only with spending cuts: 20% Mostly with spending

    asked by Ashley
  61. Pre Calculas

    Need help Give an example of an exponential function that goes through the point (0,4) .

    asked by Reese
  62. differential equations

    Convert x''+ sin(x) = 0 into a first order system of equations. (x'' refers to the second derivative of x). I tried: y1 = sin(x) y2 = x' {y1' = cosx {y2' = -sinx Not sure if I did it right.

    asked by Sarah
  63. Physics

    What is the mass of a copper wire that will give a wire, 0.20mm in diameter, a resistance of 400 ohms can you please show me the formulas

    asked by John
  64. Chemistry

    Write the formulas of the compounds formed by NH4+ with the following anions: CN-, ClO3-, SO42-, H2PO4-

    asked by Kim
  65. Health (STD's)

    Explain successful methods to prevent, detect, and treat communicable diseases. You don't have to give me the answer all I need is some good websites.

    asked by Anonymous
  66. english

    (1) Jack had been without a car since Monday. (2) The car needed a new battery, and Jack was broke. (3) Although he was embarrassed, Jack called his mother. (4) He felt he had no choice. (5) Fortunately, his mom was happy to help out. (6) She said she had

    asked by lucy
  67. chemistry

    how many molecules are present in a 750 ml of C6H12O6

    asked by Anonymous
  68. Math

    True or false: If a is any positive real number, the graph of y=a^x will go through the point (0,1). True or false: x^3+2x^2 is an exponential equation because it contains exponents. I got true for both of them is that right?

    asked by Sam
  69. math

    32 men can do a piece of work in 18 days. In how many days will 72 men do it? For 30 buffaloes, the fodder in a certain stock is sufficient for 8 days. For how many buffaloes the fodder is sufficient for 12 days? Pls help me

    asked by jyoti
  70. math

    Indicate the correct answer for the function. If (x)= x^3 - 3x^2 + 3x + 7, then f(x) is: a) Maximum b) Minimum c) Neither maximum or minimum d) not possible

    asked by Ahmad Faraz
  71. math/ pre algebra

    Lydia rode 243 miles in a three day bike trip. On the first day, Lydia rode 67 miles. On the second day, she rode 92 miles. How many miles per hour did she average on the third day if she rode for 7 hours?

    asked by neftali
  72. math

    Mary works in a factory that produces 1,000 telephones each day. When 30 telephones were sampled, it was found that 9 were defective. Estimate how many telephones are defective each day.

    asked by Anonymous
  73. Math 250

    Locating a car from the 102nd floor observation deck of the empire state building, an observer spots his car at an angle of depression of 5 degrees. if the observation deck is 1250 feet high, how far is his car from the building?

    asked by Eseta
  74. ENGLISH Correcting #5,6,8 & 9

    5)Both Ada and Phil are evaluating their thesis statement, topic sentences, and evidence. If Ada finds that her essay doesn't have a thesis statement identifying the topic of the essay, Ada will reread the essay and decide what the main point of the essay.

    asked by Basti
  75. physics

    Explain two different reasons why fibreglass is used to fill the space between the concrete block and the metal casing.

    asked by Fernando Guo
  76. English

    Do you agree or disagree with the following statement children should begin stadying a foreign languages as soon as they start school.Why? Why not?

    asked by kristen
  77. SCIENCE PLZ HELP

    1. Compare the natural greenhouse effect with the human-induced process

    asked by coolguy456
  78. Chemistry

    Automotive airbags inflate when sodium azide, NaN3, rapidly decomposes to its constituent elements according to the chemical equation, 2 NaN3 -> 2 Na + 3 N2. How many grams of nitrogen are produced when 1000 milligrams of sodium azide decomposes?

    asked by Sarah
  79. saint joshef

    Given a planar electromagnetic wave in vacuum whose B-field is denoted by Bx = 0, Bz = 0, B_y = 66.7 × ?10?^(-8) sin 4?p?10?^6 (z-3×?10?^8 t) Write an expression for the E-field. What are wavelength, speed and direction of motion of the disturbance?

    asked by pankaj
  80. science

    A man throws over a cliff and hears it strike at the bottom in 8 second. The temperature is 25 C. what are the two times ; the time that the stone travels and the time that sound travels ? what is the height of the cliff in meters?

    asked by mohamed
  81. math

    Write an equation of the line that passes through each pair of points (0,0) and (7,7)

    asked by Cristal
  82. maths

    Helpp mee!!! I'm really stuck so I need help. Teresa has three times as much money as Rita. Between them they have €10. How much has Teresa?

    asked by hazel
  83. SCIENCE PLZ HELP

    2. What are the greenhouse gases? Which one is the biggest concern?

    asked by coolguy456
  84. Physics

    How does using the concept of resonance determine the speed of sound an in experiment? In other words, I'm wondering how the concept of resonance works

    asked by Emma
  85. Physics

    The asteroid EROS has a mass of 7.4x10+15kg. A 103kg astronaut stands on the surface, 33km from the centre of the asteroid. What weight does she experience ? Give your answer in Newtons. Take the Gravitational constnat, G, to be 6.67x10-11.

    asked by Bill Nye
  86. coding

    three quadrant hemorrhoidectomy icd 9

    asked by jackie
  87. english

    what is quotation marks?

    asked by misty
  88. Social Studies

    social studies

    asked by Kaai97
  89. Math

    The table below represents the velocity of a car as a function of time: Time (hour) x Velocity (miles/hours) y 0 50 1 52 2 54 3 56 Part A: What is the y-intercept of the function, and what does this tell you about the car? (4 points) Part B: Calculate the

    asked by Kyle
  90. math

    A Company has introduced a new product whose annual demand will depend on price charged. The demand of the product is represented by the function q = 100,000 – 200p, (where p = price and q = quantity demanded annually). Studies indicate that total cost

    asked by Haroon Gondal
  91. math

    A company determines that the marginal cost of producing x units of a particular commodity during a one-day operation is 16x – 1,591, where the production cost is in rupees. The selling price of a commodity is fixed at Rs.9 per unit and the fixed cost is

    asked by zaib ali
  92. math

    The total cost C(x) of a firm is C(x) = 0.0005x^3 – 0.7x^2 – 30x + 3,000, where x is the output. The value of x; for which MVC = AVC is: (where VC denotes the variable cost, MVC denotes marginal variable cost and AVC denotes average variable cost

    asked by moon
  93. math

    Maximum or minimum values of the function f(x) = (1 – x)^2 e^x is: i need solution (a) Minimum value at x = –1; maximum value x = 1 (b) Minimum value at x = 1; maximum value x = –2 (c) Minimum value at x = 1; maximum value x = –1 (d) None of these

    asked by asad
  94. Trigg

    This one is throwing me off, I don't get how to do a identity equaling to -.3 Cos2x=-.3

    asked by katelyn
  95. math

    The cost of producing x units of balloons is given by C(x) =140 + 0.125x + 0.0005x^2. If the revenue function is determined by R(x) = 3x, maximum profit is:

    asked by almas
  96. wordly wise

    circle the letter or letters of each correct answer. which of the following can suffer from CONGESTION? A city streets B a theater lobby C a car D the passages in one's nose it can have more than one correct answer

    asked by misty
  97. Math

    Part A: Max rented a motorbike at $465 for 5 days. If he rents the same motorbike for a week, he has to pay a total rent of $625. Write an equation in the standard form to represent the total rent (y) that Max has to pay for renting the motorbike for x

    asked by Karen
  98. Algebra 1 Honors

    A taxi cab charges $2.50 for the first mile and $0.35 for each quarter mile after that. Johns taxi ride to he airport was 15.75 miles. What was his fare?

    asked by Shawn
  99. Physics

    Alex is exploring a cave that has a slight incline and is iced over, forcing her to use ice cleats to explore it. After climbing 50 m into the cave, she finds what she is looking for and she takes out her ice pick and hammer to begin removing the stones.

    asked by cocol
  100. precal

    Help please! sin4x=3cos^3xsinx-4sin^3xcosx

    asked by kaitlyn
  101. precal

    3sin3x+2=4

    asked by jennifer
  102. science help PLS

    What is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? As air pressure in an area increases, the density of the gas particles in that area decreases. As air pressure in an area increases,

    asked by Oscar
  103. Behavioral Stat. Help!

    Conducting a post hoc test is similar to conducting multiple t-tests. As a result, it would seem natural to want to bypass the ANOVA and just use repeated t-tests. Explain why this approach is not necessarily a good idea and why an ANOVA followed by a post

    asked by slomomo
  104. Algebra

    A square has an area of 49 square units. Find the sode length and perimeter of the square.

    asked by Kay
  105. Algebra 1 Honors

    The volume of a cylinder is 157 cubic inches. The base of the cylinder has a diameter of 5 inches. What is the height of the cylinder? Round to the nearest tenth of an inch.

    asked by Anonymous
  106. Algebra

    A square has an area of 49 square units. Find the side length and perimeter of the square.

    asked by Anonymous
  107. english

    Define verb tense. Write a sentence that has a simple present tense verb. Rewrite it, changing the verb to simple past tense, simple future tense, each of the perfect tenses, and each of the progressive tenses.

    asked by jo
  108. physics

    How does the concept of resonance work?

    asked by Emma
  109. ENGLISH

    1. Joseph ate dessert before he ate dinner. --> Are the capitalized words a phrase or a clause? Answer: Clause. 2. She left early in the morning. --> Are the capitalized words a phrase or a clause? Answer: Phase. IS THIS CORRECT?

    asked by jo
  110. english

    An imperative sentence is to a command as a declarative sentence is to a/an A. statement. B. wish. C. question. D. exclamation. my answer is D

    asked by lucy
  111. English

    What is an example of Aristophanes' satire of society (other than of women)?

    asked by Anonymous
  112. Statiatics

    Need help please. Determine whether each experiment is a binomial experiment or can be reduced to a binomial experiment. If so, describe a trial, determine the random variable, and state n, p and q. a) You roll a die 15 times and find the sum of all the

    asked by Josh
  113. just checking(:

    For the equation -4y = 8x, what is the constant of variation? a) -4 b) -2 c) 1 d) 2 Is it b) 2?

    asked by Linear Functions
  114. physics

    A typical red blood cell has a mass of 3.0 10-16 kg. A blood sample placed in a centrifuge is subjected to a force of 4.6 10-11 N when the centrifuge is operated at 138 rev/s. What is the diameter of the centrifuge?

    asked by Yaacov
  115. Statistics

    One last one. A poll at Steve's high school was taken to see if students are in favor of spending class money to expand the junior-senior parking lot. Steve surveyed 6 random students from the population. 85% favored the expansion, while 15% opposed it. a)

    asked by Josh
  116. math

    Use the rated acute angle to state an equivalent expression sin 350

    asked by mila
  117. Chem

    Using the same unbalanced chemical reaction, what is the theorectical yeild of CO2 if 16.0g of methane reacts with excess oxygen: CH4(g)+ O2 (g)→ CO2 (g)+ H2O(g)

    asked by Debra
  118. Science

    what are some scientific experiments ideas My teacher told me I could do a scientific experiment following the scientific method.

    asked by June
  119. Algebra

    If (c) were f(k)=-4/k+7, what value of k would be excluded from the domain?

    asked by Tasha
  120. Geometry

    A(-3,3) ---> A' is a glide reflection where the translation is (x,y) (x+5,y), and the line of reflection is y=1. What are the coordinates of A'? (2,-3) (-3,5) (5,1) (2,5) ---> is an arrow. I am not good on glide reflections and I'm very stuck on this one:(

    asked by SkatingDJ
  121. Science

    The town of Seaside needs to build a new power plant. The old coal burning plant produces too much pollution and is no longer safe. The mayor decides that he will do some research on alternative forms of energy like nuclear power plants and solar power

    asked by Mark
  122. law

    Which of the following is NOT an argument in support of plea bargaining?

    asked by ki
  123. Algebra

    The number of bacteria in a certain population increases according to a continuous exponential growth model, with a growth rate parameter of 3.7% per hour. How many hours does it take for the size of the sample to double? Note: This is a continuous

    asked by Kanise
  124. chemistry

    How many grams of bismuth (III) chloride can be produced from 575 mL of chlorine gas at STP when reacting with excess bismuth metal?

    asked by nicholas
  125. Algebra

    Mr. Wright has a class of 15 students. He can spend $23 on each student to buy math supplies for the year. He first buys all of his students calculators, which costs a total of $69.45. After buying the calculators, how much does he have left to spend on

    asked by Caleb
  126. English

    1. This summer, what did Hajun do? He went camping with his friend John¡¯s family. 2. Where did they go? They went to Yosemite National Park. 3. What is Yosemite famous for? It is famous for its natural wonders. 4. On July 20, what did they do? They

    asked by rfvv
  127. Algebra

    Year Number of Graduates (in millions) 2009 15.4 2010 15.9 2011 16.3 2012 16 2013 15.7 a. Code the years using t = 1 for 2009 and fit a quadratic function to the data with the regression program on your calculator. equation is

    asked by john
  128. English

    1. I am too tired to focus on the teaching. I am too tired to do the laundry. I am too tired to mop the floor. I am too tired to iron my uniform. I am too tired to clean the living room. I am too tired to arrange the things in the living room. 2. I am too

    asked by rfvv
  129. Language Arts HELP NEED !!!!!!!

    1)In all together now, Barbara Jordan's main purpose is to a)persuade readers that a tolerant society is best created by working on a small scale. b)inform readers of the civil rights movement in the United States. c)praise the work of the leaders of the

    asked by itxhel
  130. 1Physics

    One end of a spring is attached to the ceiling. The unstretched length of the spring is 10.0 cm. A 2.0 kg mass is hung from the other end of the spring. It is slowly lowered until it comes to rest. At this point the spring is 15 cm long. (a) What is the

    asked by Anonymous
  131. Math

    A box containing 5 red balls and 3 green balls weighs 43 g. When the box contains 3 red balls and 5 red balls it weighs 37g. When it contains one ball of each it weighs 19g. What is the mass of the box and of each ball.

    asked by Zeisha Khan
  132. Pre-Calculus HELP!

    Explain how the transformations of the functions f(x)=15sin(x) and f(x)=sin(x)+15 differ. I see that f(x)=sin(x)+15 experiences a vertical shift, but I am not sure about the transformation that f(x)=15sin(x) experiences. Thank you for your help!

    asked by Ellie
  133. Math

    The mean for Eric's class is $148. The mean for Natalia's class is $152. Natalia's sales total $150. If Natalia moves to Eric's class, the mean for each class increases. Explain why.

    asked by Riwa
  134. math

    in a class there are 28 boys and 14 girls.what fraction of the pupils are girls.

    asked by Anonymous
  135. maths

    a bag contains three labelled A,R,C and a box contains 4 cards 1,2,3,5. if cards are picked from the bag and from the box, find the probability of picking on A and a prime number

    asked by christina
  136. math

    32 men can do a piece of work in 18 days. In how many days will 72 men do it? For 30 buffaloes, the fodder in a certain stock is sufficient for 8 days. For how many buffaloes the fodder is sufficient for 12 days? Pls help me

    asked by jyoti
  137. calc

    Find the velocity, v(t), for an object moving along the x-axis if the acceleration, a(t), is a(t) = 2t + sin(t) and v(0) = 4

    asked by ANONYMOUS
  138. English

    Is your house close to your work? ============ What is the part of speech of 'close' here? An adjective or an adverb?

    asked by rfvv
  139. Chemistry - Energy Phase Changes

    Calculate the quantity of heat gained or lost in the following change: 0.44 mol of water evaporates at 100 degrees Celsius - So what I did was: 1 mol -> 6.01 kJ 0.44 mol -> x x = 2.64 kJ of energy gained But apparently this is incorrect? Could somebody

    asked by Kid
  140. English

    1. The house is close to the river. 2. The house is near the river. 3. the house is by the river. 4. The house is next to the river. ====== Are they all the same and grammatical? Do we have some more similar expressions?

    asked by rfvv
  141. Geometry

    Find the length of a segment that has endpoints h(2, -3) and j(12, 7) 20 10 square root 2 4 square root 2 40 Please help? Thx

    asked by SkatingDJ
  142. calc

    A pitcher throws a baseball straight into the air with a velocity of 72 feet/sec. If acceleration due to gravity is -32 ft/sec2, how many seconds after it leaves the pitcher's hand will it take the ball to reach its highest point? Assume the position at

    asked by ANONYMOUS
  143. English

    1. It was close to 1:15 a.m. 2. It was near 1:15 a.m. 3. It was about 1:15 a.m. 4. It was around 1:15 a.m. 5. It was roughly 1:15 a.m. 6. It was approximately 1:15 a.m. ================= Are they all grammatical and do they have the same meaning?

    asked by rfvv
  144. Heat and Heat Transfer

    Two calorimeters each contain 1.4L of water and have a temperature of 26°C In the first calorimeter, you burn a sample of candle wax and determine that 108.2kJ of energy is released. In the second calorimeter, you have to burn 5.4g of candle wax to raise

    asked by Kid
  145. physics

    A scuba tank, when fully submerged, displaces 15.7 L of seawater. The tank itself has a mass of 13.9 kg and, when "full," contains 3.20 kg of air. The density of seawater is 1025 kg/m3. Assume that only its weight and the buoyant force act on the tank.

    asked by arshi
  146. math

    Bill swam 4 kilometers against the current in the same amount of time it took him to swim 12 kilometers with the current. The rate of the current was 2 kilometers per hour. How fast would Bill swim if there were no current?

    asked by mik
  147. calculus

    integrate (e^t + e^-t)²

    asked by ligas
  148. physics

    Engine oil (η = 0.20 Pa⋅s) passes through a fine 2.60-mm-diameter tube that is 8.60 cm long. What pressure difference is needed to maintain a flow rate of 7.8 mL/min ? So what i did was (7.8Ee-3 /60) = π P (1.3e-3) ^4 /(8* 0.086*0.2) I get 1.99E5 but

    asked by arshi
  149. ps 215

    Given km insects angle jkl prove angle 2=angle 3

    asked by amand
  150. batangas state university

    Find cos theta, given that sin theta=3/5 and theta is in quadrant II

    asked by jeanela
  151. Statistics need help

    Need help please on these questions: 1. A poll at Steve's high school was taken to see if students are in favor of spending class money to expand the junior-senior parking lot. Steve surveyed 6 random students from the population. 85% favored the

    asked by Josh