Questions Asked on
October 24, 2010

  1. Mathematics for Liberal Arts

    Each round of the game costs $1 to play. A round consists of you choosing a number from 1 to 10 and then picking a card at random from a standard deck of cards. I fyou pick a card with the number you chose, you win $5. If you don't, you lose your dollar.

    asked by Sasha
  2. chemistry

    For the reaction C3H8+5CO2=3CO2+4H2O How many grams of O2 react with 8.80grams of C3H8? I think the ans is 32.0gO2

    asked by Lillian
  3. chemistry

    For the reaction C3H8+5CO2=3CO2+4H2O How many moles of c3h8 are needed to make 3.6 grams of c3h8? I think the ans is 44.8molesc3h8

    asked by Lillian
  4. algebra

    While shopping, Jill spent six times as much as Nan. If they spent a total of $112, how much did each person spend?

    asked by Dave
  5. fiance

    suppose the interest rate is 8% APR with monthly compounding. What is the present value of an annuity that pays $90 every 6 months for 5 years?

    asked by si
  6. chemistry

    For the reaction C3H8+5CO2=3CO2+4H2O How many grams of co2 will be produced by buring 0.15 moles of c3h8?i thoink the ans is 16.2gco2

    asked by Lillian
  7. math

    the chippa soccer association calculates its profit from gate taking match according to this formular p=5n-55 Where p is profit in rand an n is the number of people in the stadium a.calculate the profit when the number of people in the stadium is 250 b.if

    asked by nathy
  8. college

    The Everton college store paid $1941 for order of 51 calculator's, cost the store $57.The othe the store $57 eadch. How many of each type of calculator was ordered?

    asked by Jackie
  9. e-commerce

    I want to prepare a questionnaire for e-commerce project to find if there is a need for e-tutoring program. Please help me to find a sample of questions to the parent, student and teachers.

    asked by Huda
  10. Chemistry

    When an electron makes a transition from the n=3 to the n=2 hydrogen atom bohr orbit, the energy difference between these two orbits (3.0x10^-19 J) is given off in a photon of light. The relationship ... between the energy of a photon and its wavelength is

    asked by Wyatt
  11. Statistic

    I am getting problems with my calculations. For the first part of the question I got 68 when I try another calculation I got 1. One of the method used was Degree of freedom =(r-1)(c-1). TABLE 12-7 The director of transportation of a large company is

    asked by doug
  12. Statistic

    TABLE 12-11 Parents complain that children read too few storybooks and watch too much television nowadays. A survey of 1,000 children reveals the following information on average time spent watching TV and average time spent reading storybooks Average time

    asked by GN
  13. Physics

    The boy on the tower of height h = 10 m throws a ball a distance of x = 68 m, as shown. At what speed, in m/s, is the ball thrown?

    asked by Nina
  14. Statistic

    TABLE 12-6 The dean of a college is interested in the proportion of graduates from his college who have a job offer on graduation day. He is particularly interested in seeing if there is a difference in this proportion for accounting and economics majors.

    asked by NDW
  15. physics

    A golfer imparts a speed of 24.6 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air?

    asked by kya
  16. physics

    A merry go round makes 2 revolutions every 2 s. A child is sitting 1.80 m from the center. Calculate a)The period of the merry go round b)the speed of the child in his position c) the centripetal acceleration of the child d) the net horizontal force on the

    asked by Carmen
  17. Managerial Finance & Accounting

    P12-14 Strategic Capital Investment Decisions Smith Electronics manufactures portable CD players. Lillian Perez, the VP of operations at Smith Electronics, is considering a major capital investment decision. It would cost $2,500,000 to put new, highly

    asked by Anonymous
  18. Statistic

    TABLE 12-3 A computer used by a 24-hour banking service is supposed to randomly assign each transaction to one of 5 memory locations. A check at the end of a day's transactions gave the counts shown in the table to each of the 5 memory locations, along

    asked by WMD
  19. physic

    golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.5 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 60¡ã above the horizontal.

    asked by kya
  20. Statistic

    If we use the ÷2 method of analysis to test for the differences among 4 proportions, the degrees of freedom are equal to: A) 3 B) 4 C) 5 D) 1

    asked by Anonymous
  21. physic

    .Question part Points Submissions 1 ¨C/1 0/2 Total ¨C/1 ...A volleyball is spiked so that it has an initial velocity of 18 m/s directed downward at an angle of 50¡ã below the horizontal. What is the horizontal component of the ball's velocity when the

    asked by kya
  22. physics

    The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women's

    asked by myx
  23. physics

    A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 57.6¡ã above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 25.5 m away. The rocket attains its launch speed in a negligibly short period of

    asked by myx
  24. college algebra

    Slopes are all around you! Take a look around where you are right now. You can calculate the slope of any object. For this assignment, find an object in your house, workplace, car, etc. and calculate its slope in inches. You will need a ruler for this

    asked by lasheena
  25. Physics

    A baseball is seen to pass upward by a window 24 m above the street with a vertical speed of 8 m/s. The ball was thrown from the street. (a) What was its initial speed? (b) What altitude does it reach? (c) How long after it was thrown did it pass the

    asked by Jen
  26. science

    Ca3(PO4)2 + 2H2SO4 = 2CASO4 + Ca(H2PO4)2 How many moles of CaSO4 can be produced by the reaction of 0.39 moles of Ca3(PO4)2 with excess H2 SO4?

    asked by neil
  27. chemistry

    for the reaction, NaOH+HCl yield H20 + NaCl how is the rule that tells us Na goes with Cl and OH with H? Why does NaCl does not dissociate

    asked by flame
  28. Financial

    Scenario investment # 1 TA Holding is considering investing in project A, whether to invest in new product with a product life of four years. The cost of the fixed asset investment would be RM3,000,000 in total, with RM1,500,000 payable at once and the

    asked by Mr Lau
  29. chemistry

    According to the following reaction, how many grams of sulfur trioxide will be formed upon the complete reaction of 21.2 grams of oxygen gas with excess sulfur dioxide? sulfur dioxide (g) + oxygen (g) sulfur trioxide (g)

    asked by nik
  30. Physics

    A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to six times her weight as she goes through the dip. If r = 20.0 m, how fast

    asked by madeline
  31. science

    given that the energy released per fissin of Uranium-235 nucleus is 200Mev, calculate the number of fissions and amount of energy available if 50g of Uranium-235 is completely fissioned

    asked by Anonymous
  32. Criminal Law

    Can someone please help me. need help with a story about Murder-to-Hire. that includes:solicitation,conspiracy, criminal attempt and it must include individuals who acts as principals,accomplices,accessories before the fact and accessories after the fact.

    asked by catherine
  33. Math

    Solve for Y: 96y-432=84y+192

    asked by Sabina
  34. adult education

    identify the three domains of development. Describe why it is important to consider each domain in the study of adult education?

    asked by Linda
  35. Social St

    How to write a argumentative essay on Plymouth,Massachusetts 1620 ? What can be some topics????

    asked by Sumaiya
  36. English

    Is the following sentence correct? Please provide us with the requisite information on the product.

    asked by ann
  37. chemistry

    to calculate Ea i solved for slope and i got -7.6111x10^3 so i did this for Ea: 7.61x10^3 x 8.314/mole= 63.3 KJ/Mol but someone told me im missing the number 2.30? that i have to mulitply (2.30)(8.314)(7.61x10^3)=? which is right?

    asked by ben
  38. science

    state the chemical reagent that is used to demonstrate that expired air contains carbon dioxide

    asked by michelle
  39. chemistry

    Determine the ratio of cations to anions for the following ionic compounds a. potassium, a salt substance b. calcium floride, used in steel industry c. aluminum oxide, known as corundum in the crystalline form d. calcium oxide, used to remove sulfur

    asked by Jess
  40. English

    Which sentence is correct? 1) Please provide the shelf life information on the following biscuits: - or 2) Please provide the shelf life information of the following biscuits: -

    asked by ann
  41. 4th grade

    Marty has 6 more pogs than Jen. After he gives 10 pogs to Jen, how many more pogs will Jen have than Marty?

    asked by McK
  42. physics

    an object of 3 kg is dropped from 2m above the ground. it takes a time interval of tE to reach the ground of the earth. if it is dropped on the moon, how long does it take to reach the ground? the a dure to g on the moon is 1/6 of that on the earth.

    asked by kylie
  43. economics

    What is the present value of $10,000 paid out at the beginning of each of the next two years using an interest rate of 10%?

    asked by Therese
  44. US History

    Need help answering this: 'During the 1890s local storekeepers protested rural free delivery by the Post Office because they feared competition from mail-order businesses that offered a greater variety of goods at lower prices. Describe the challenges

    asked by mysterychicken
  45. Applied statistics for business and economics

    Only 0.02% of credit card holders of a company report the loss or theft of their credit cards each month. The company has 15,000 credit cards in the city of Memphis. Use the Poisson probability tables to answer the following questions. What is the

    asked by Todd
  46. HS physics

    A drawing shows a device that can be used to measure the speed of a bullet. The device consists of two rotating disks, separated by a distance of d = 0.790 m, and rotating with an angular speed of 65.0 rad/s. The bullet first passes through the left disk

    asked by Sarah
  47. physics

    An electric drill starts from rest and rotates with a constant angular acceleration. After the drill has rotated through a certain angle, the magnitude of the centripetal acceleration of a point on the drill is twice the magnitude of the tangential

    asked by Jordan
  48. Engl 227

    What does it mean to use a "process-oriented approach" in writing?

    asked by larry
  49. life science

    1. Botany is the study of _________. 2. What bird is like a drink of water?

    asked by Birdy
  50. Earth science

    What is a relief map?

    asked by Birdy
  51. Helth science

    True or False: Laid end to end, the blood vessels in your body would circle the Earth two and a half times. 2. The _________ is made up of cardiac muscle.

    asked by Birdy
  52. physics

    Question part Points Submissions 1 0/1 1/5 Total 0/1 ...If a truck traveling 38.0 km/h uniformly accelerates up to 55.0 km/h, what's its average speed in the process?

    asked by Anonymous
  53. Physical science

    What does a plane do when it piches?

    asked by Birdy
  54. physics

    During a swing the head of a golf club is in contact with the ball for about 0.5 ms and the ball goes from zero to 69 m/s. Assuming the acceleration is constant, determine its value.

    asked by Anonymous
  55. chemistry

    to calculate Ea i solved for slope and i got -7.6111x10^3 so i did this for Ea: 7.61x10^3 x 8.314/mole= 63.3 KJ/Mol but someone told me im missing the number 2.30? that i have to mulitply (2.30)(8.314)(7.61x10^3)=? which is right?

    asked by ben
  56. life/health science

    What bird is like a drink of water? Giardiasis is a type of diarrhea that's also called a) beagle fever b) beaver fever c) Bieber fever * I think the last ? is a??????

    asked by Birdy
  57. Finance

    Wachowicz Corporation issued 15-year, noncallable, 7.5% annual coupon bonds at their par value of $1,000 one year ago. Today, the market interest rate on these bonds is 5.5%. What is the current price of the bonds, given that they now have 14 years to

    asked by Anonymous
  58. 9th grade

    What is the definition of a crossroads for trade?

    asked by Connor
  59. Statistic

    Using this TABLE 12-6 for the following questions: The dean of a college is interested in the proportion of graduates from his college who have a job offer on graduation day. He is particularly interested in seeing if there is a difference in this

    asked by Anonymous
  60. college

    Why do economists refer to the economy as "fully employed" even when there is measured unemployment as high as 4.5% -5% ?

    asked by Anonymous
  61. Social Studies

    What were the things that the Natives Americans thought the plymouths???????

    asked by Sumaiya
  62. Algebra ( Check +Help please)

    11/w=33/w+24 Basically it's made to look like a proporiton, ratio + ratio. And I know that 33w= 11(w+24) But I don't know what to do from there could somebody explain to me? Thank you!

    asked by Allyson
  63. global studies

    How does geography affect the history of a nation?

    asked by Connor
  64. social studies

    -Lyndon B. Johnson Former President Lyndon felt that the most important first step in the war against poverty is? A) full employment B) efficiency in government C) our natural defense D) private and public economics

    asked by Anonymous
  65. Mathematics for Liberal Arts

    Using a standar deck of 52 cards, what is the probability of drawing four cards of the same number(eg.four aces, 4 kings, four 2s, four 3s,etc?

    asked by Sasha
  66. Economics

    Why might exploiting a comparative advantage increase real incomes? I just need two reasons

    asked by Lucy
  67. preap physics

    what is the voloocity snd acceleration of a golfer who drves her ball from in a down the fairway in a high arching shot when the ball is at its hieghest point if its flight.

    asked by michael
  68. Auditing

    Would a public accounting firm be held liable to a third party (creditor) who extended money because on reliance of erroneous financial statements? The specific example features a junior member of the accounting firm intentionally misrepresenting the

    asked by Horatio
  69. Physics

    suppose that the net external force exerted on the car is 350 N parallel to the ground, and the mass of the car is 1800 kg. What is its acceleration?

    asked by Lisa
  70. english!!

    circle the context clue that shows the menaing of the word in italic type, then write a synonym for the meaning you infer on the lines provided. ¡ö jennifer wanted to travel abroad to a foreign land._____________________ ¡ö Stop brooding! Moping and

    asked by aj
  71. Social St

    What were some hardships that the Plymouths faced and how did the Natives help them with those issues???

    asked by Sumaiya
  72. math grade 10

    why is a stick of gum like a sneeze?

    asked by maman
  73. Physics

    A stone is tied to a string (length = 0.450 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

    asked by Jennifer
  74. social studies

    How did geography shape Canada between 1815 and 1840?

    asked by pkd
  75. Reading

    I am currently reading Chapter 7 of "Lord of the Flies", and one of my study questions from chapter 6, I failed to find in chapter 6.. How was this a good meeting for Ralph? How does he get the attention of the meeting away from Jack? Do the boys want to

    asked by Goober
  76. english 9th grade

    What are some symbols in 'a journey to the center of the earth' by jules verne

    asked by Haley
  77. math

    Approximately how much is a 10 mile high stack of pennies worth?

    asked by marg
  78. precalc

    find the zeros of the function: f(x)=x^3+2x^2-109x-110 I think I need to factor but everytime I do, it doesn't look right.

    asked by kate
  79. Social St

    What did the pilgrams faced during there journey ?????

    asked by illy
  80. Physics

    A fighter pilot dives his plane toward the ground at 345 m/s. He pulls out of the dive on a vertical circle. What is the minimum radius of the circle, so that the normal force exerted on the pilot by his seat never exceeds three times his weight?

    asked by Adam
  81. Physics

    If 2.0 J of work is done in raising 180 g apple how is it lifted? Please if you answer, do it step by step. Thanks in advance.

    asked by Daniel
  82. Physics

    suppose that the net external force exerted on the car is 350 N parallel to the ground, and the mass of the car is 1800 kg. What is its acceleration?

    asked by Lisa
  83. Chemistry

    5. The elements are related by properties in groups.- F? 7. In Earth's environment, hydrogen is a metal.- T? Thanks -MC

    asked by mysterychicken
  84. Chemistry

    What is the dominant intermolecular forces for C2H5OC2H5 (diethyl ether)? Is it dispersion and polar?

    asked by Anonymous
  85. Physics

    A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

    asked by Ingrid
  86. health safety nutrition

    Explain the importance of the feeding relationship between young infants and teachers and how teachers promote this

    asked by Anonymous
  87. grammar

    I need help identifying gerund or gerund phrase, and then what is the subject, predicate noun, direct object, object of a preposition for the following sentences: Even the clock's ticking annoyed her. Jenny tried reading for awhile

    asked by Devinee
  88. physics

    A volleyball is spiked so that it has an initial velocity of 18 m/s directed downward at an angle of 50¡ã below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

    asked by hy
  89. St. Andrews

    An airplane traveling 1011 m above the ocean at 145 km/h is going to drop a box of supplies to shipwrecked victims below. (a) How many seconds before the plane is directly overhead should the box be dropped? 1 s (b) What is the horizontal distance between

    asked by CArl
  90. Chemistry

    Lake Vida is an enormous hypersaline lake that lies under 19 m of ice in the Dry Valleys region of Antartica. The freezing point of the water is approximately -17 C owing to the fact that it is many times as salty as typical saltwater (assume all of the

    asked by Konan
  91. Chemistry

    Lake Vida is an enormous hypersaline lake that lies under 19 m of ice in the Dry Valleys region of Antartica. The freezing point of the water is approximately -17 C owing to the fact that it is many times as salty as typical saltwater (assume all of the

    asked by Konan
  92. physics

    A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 64.7¡ã above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 25.0 m away. The rocket attains its launch speed in a negligibly short period of

    asked by hy
  93. 4th grade math

    how can thinking about 90 tens help you with 1901-297?

    asked by charlee
  94. ECONOMICS

    Q2) Given a firm’s demand function, P = 24 - 0.5Q and the average cost function, AC = Q2 – 8Q + 36 + 3/Q, calculate the level of output Q which: a) maximizes total revenue b) maximizes profits

    asked by Anonymous
  95. Spanish

    How do you say she is teaching in the class room in spanish?

    asked by Raven
  96. Economics

    Why do France, USA, CHINA AND INDIA HAVE COMPARATIVE ADVVANTAGE IN TOURISM?

    asked by Brogan
  97. calculus

    xe^(4x) List all the critical numbers:

    asked by Denzel
  98. Social St.

    The Native Americans life in the new world????

    asked by Sumaiya
  99. chemistry

    how quickly must a 54.7 g tennis ball travel i order to have a de Broglie wavelength that is equal to a photon of green light?

    asked by Megan
  100. psych

    Describe and compare the uses and limitations of naturalistic, laboratory, and participant observation, case studies, tests, surveys and interviews, correlational studies and experiments.

    asked by elana
  101. psych

    Discuss ethical issues in psychology, including the use of animal subjects, confidentiality, informed consent, and the use of deception in research. Describe how psychologists' values influence their work.

    asked by elana
  102. psych

    15. Discuss the following hypothetical pieces of research and point out the problems with the research design which prevent you from drawing the stated conclusions.  In addition, suggest at least two factors other than the one mentioned in the conclusion

    asked by elana
  103. physics

    A large open tank is filled with water to a depth of 15 m. A spout located 10.0 m above the bottom of the tank is then opened as shown in the drawing. What is the volume flow rate from the spout? Assume that the radius of the spout is 2 cm.

    asked by darin
  104. math

    Approximately how much is a 10 mile high stack of pennies worth?

    asked by marg
  105. Physics

    A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

    asked by Adam
  106. physics

    A bicycle wheel has a diameter of 64.2 cm and a mass of 1.79 kg. Assume that the wheel is a hoop with all of the mass concentrated on the outside radius. The bicycle is placed on a stationary stand and a resistive force of 115 N is applied tangent to the

    asked by A
  107. physics

    How much work did the movers do (horizontally) pushing a 180- crate 10.6 across a rough floor without acceleration, if the effective coefficient of friction was 0.50?

    asked by Anonymous
  108. physics!!!!!! (The questions are actually short)

    CAn an object be increasing its speed with negative acceleration-----explain why or why not give an example of when both velocity and acceleration are neg. can the magnitude of a vector ever equal or be less than one of its components? If you are riding a

    asked by Kavi
  109. physics vs. Chem

    Doesnt physics seem to be harder than chem? Anyone?

    asked by Kavi
  110. Physics

    A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 52(angle sign here) downward from the horizontal. Find the work done by the shopper on the cart as the shopper moves along a 50.0 m length of aisle. Someone tell me if

    asked by Edwin
  111. geography

    how thick is the bedrock in the inetrior plains and why is it so thick

    asked by anne
  112. AP Chemistry

    What volume of 6.48 M HNO3 is required to prepare 301 mL of a 1.2 M HNO3 solution? Answer in units of mL.

    asked by Anonymous
  113. Human Geography

    How do I calculate the physiological density of Namibia? I can't find it!! HELP!! :)

    asked by Haley
  114. Social St.

    What were the Native Americans side of the story in 1620?

    asked by Sumaiya
  115. Global Issues

    Hi, I have an essay that I have to write for this class and the topics is: The richer states (countries) have the responsibility to provide for the world's poorer states. And I am on the pro side of this. (Just because I thought it'd be easier to write

    asked by y912f
  116. Social St.

    what were the native americans reactions when they saw the pilgrams

    asked by Sumaiya
  117. Physics

    A helicopter is ascending vertically with a speed of 9.00 m/s. At a height of 90 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?

    asked by Jen
  118. trig

    suppose sin(x)=5/6, and x is in the first quadrant. Determine cos(x), sin(2x), and cos(2x).

    asked by jj reddick
  119. Physics

    write on (i) Cloud chamber (ii) pressurized water reactor (iii) breeder reactor

    asked by Robert
  120. chemistry

    to calculate Ea i solved for slope and i got -7.6111x10^3 so i did this for Ea: 7.61x10^3 x 8.314/mole= 63.3 KJ/Mol but someone told me im missing the number 2.30? that i have to mulitply (2.30)(8.314)(7.61x10^3)=? which is right? to get the original -7.6

    asked by ben
  121. social studies

    how might a change in climate bring about a change in the personality of a region?

    asked by momo
  122. science

    what is the meaning of lysosmes. How is it used in a cell.

    asked by cody
  123. Economics

    Can someone help me with this question..Pleaseeee!! Suppose a government moves to reduce a budget deficit. Using the long-run model of the economy developed in Chapter 3, graphically illustrate the impact of reducing a government's budget deficit by

    asked by Steph
  124. calculus

    2x*sqrt(3x^2+4)

    asked by Zel
  125. Physics

    Two people start at the same place and walk around a circular lake in opposite directions. One walks with an angular speed of 1.10 10-3 rad/s, while the other has an angular speed of 3.90 10-3 rad/s. How long will it be before they meet?

    asked by Dawn
  126. calculus

    2x*sqrt(3x^2+4) Find all critical numbers:

    asked by Zel
  127. multimeter

    When an AC voltage is being measured across a 15 Ù resistor which is carrying a current of 12 amps, the selector switch should be set to the AC voltage position of

    asked by kristin
  128. economics

    economics - bobpursley, Sunday, October 24, 2010 at 12:06pm present value= 10,000/(1+i)+10000/(1+i)^2 I do not understand the answer!!!!!

    asked by Therese
  129. math

    At 9:00 pm the outside temperature was 20 celcius, by midnight the temperature had dropped x degrees. Which of the following represents the midnight temperature? 20 + x 20-x 20 20x

    asked by carolyn
  130. math

    Which of the following is the complete solution for the equation (x-8) (x+6)=0 1. 8 only 2. 6 only 3. 8 and -6

    asked by carolyn
  131. chemistry class

    A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) → B(g). The following data are obtained for (A) as the reaction proceeds: Time (s) 1 10 20 30 40 Moles of A 0.124 0.110 0.088 0.073 0.054 1) The average

    asked by tere
  132. 12th grade

    A perchloric acid solution is composed of 168.75 g of perchloric acid and 81.25 mL of pure water. What is the percent by mass of the perchloric acid solution? The density of water is 1.000 g/mL. When I did this part I got 67.5% But, I am having trouble

    asked by Helpplease
  133. statistics

    how to test whether these samples represent populations that are different from the general population

    asked by nicole
  134. 4th grade math

    write 1, 2, 3, 4, 5, 6, 7, 8 or 9 in each box. write a number sentence that has the greatest sum _,_ _ _ + _ _ _ write a number sentence that has the least sum _,_ _ _ + _ _ _

    asked by charlee
  135. calculus

    how do you do price elasticity when you have the equation p^3 x^3=9. and x=2

    asked by Crystal
  136. reading

    my granddaughter is in the 3rd grade and she needs help in reading

    asked by cheryl
  137. question

    are 5th grade students allowed to ask questions??????

    asked by Julie
  138. MKT 421

    Individual Assignment: Environmental Factors · Resources: University Library, Internet · Select an organization with which you are familiar that conducts both domestic and global marketing. · Write a 1,050- to 1,400-word paper in which you identify the

    asked by Charlotte
  139. physics

    As Newton showed, gravity is a force that acts along the line separating two bodies and causes the two bodies to be attracted to each other (i.e. it is a central force). In this problem, assume that the planetary orbits about the Sun are circular. a. Does

    asked by zeph
  140. Calc

    Find h'(2), given that f(2)= -3, g(2)= 4, f'(2)= -2, and g'(2)= 7 a) h(x)= 5f(x) - 4g(x) b) h(x)= f(x)g(x) c) h(x)= f(x)/g(x) d) h(x)= g(x)/1 + f(x) I have no idea how to plug these in. If someone could please show me how to go about one, I'm sure the rest

    asked by Chelsea
  141. Chemistry

    11. Semiconductors (metalloids) have properties of both metals and nonmetals.-T? 13. Covalent bonding occurs when electrons are transferred from one atom to another.- F? 17. Bonding involves all the electrons in an atom.- T? 20. Nonpolar bonds form when

    asked by mysterychicken
  142. physics

    A hockey puck sliding on a frozen lake comes to rest after traveling 265 m. If its initial velocity is 4.2 m/s, what is its acceleration (assumed constant)? Answer in units of m/s2.

    asked by Lauren
  143. STAT

    a given normal distribution with u=70 and o=6. a- what is the probability of a randomly drawing a sample of n=9 with a mean graeter than 32? b- what is the probability of a randomly drawing a score that falls between 20 and 35?

    asked by IEN
  144. reading

    she is having problem with comprehension and I do help her a lot but she is still having problems with it ,on every fri, her teacher gives the class a reading test to prepare them for the fcat test . they are practices ,but they also count on her grade

    asked by cheryl
  145. Physics

    A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

    asked by Ashley
  146. calculus

    Find the points on the curve y= (cos x)/(2 + sin x) at which the tangent is horizontal. I am not sure, but would I find the derivative first: y'= [(2 + sin x)(-sin x) - (cos x)(cos x)]/(2 + sin x)^2 But then I don't know what to do or if that is even

    asked by CMM
  147. Ap Chemistry

    A perchloric acid solution is composed of 168.75 g of perchloric acid and 81.25 mL of pure water. What is the percent by mass of the perchloric acid solution? The density of water is 1.000 g/mL. When I did this part I got 67.5% But, I am having trouble

    asked by Helpplease
  148. Health Science

    The __________ is made up of cardiac muscle. a) stomach b) lungs c) heart

    asked by Bridgett
  149. Physics (Checking answe)

    Sorry for re-posting but I need to know if I did it right, please help, I worked out the problem I just want to know if I did it right. A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 52(angle sign here) downward from

    asked by Edwin
  150. chemistry

    To what final volume should you dilute 50.5ml of a 4.75 M KI solution so that 27.5ml of the diluted solution contains 3.10g of KI

    asked by help
  151. Physical Science

    What does a plane do when it pitches?

    asked by Bridgett
  152. Life Science

    What bird is like a drink of water?

    asked by Bridgett
  153. Math

    How can you add 0 - 100 without using a calculator or going 1+2+3+4 and on?

    asked by Bridgett
  154. Biology

    What is an adrenalin receptor? For a bio project at school i have to write the gene name, the # of amino acids, the # of peptides, the tissue signal, the role, the interactions, the active site/substrate, the disease/cures/inhibitors. i've googled

    asked by anonymous
  155. Quantitative Methods

    Read the “JET Copies” Case Problem on pages 678-679 of the text of the Quantitative Methods Book. Using simulation estimate the loss of revenue due to copier breakdown for one year, as follows: 1. In Excel, use a suitable method for generating the

    asked by Anonymous
  156. Chemistry

    Calculate the cell potential for a cell based on the reaction Cu(s) + 2Ag+(aq) -> Cu2+(aq) + 2Ag(s) when the concentrations are as follows: [Ag+]= 0.53 M, [Cu2+] = 0.9 M. (The temperature is 25◦C and E0 = 0.4624 V.) Answer in V.

    asked by Alex
  157. english

    what is the difference between direct and indirect references?

    asked by andrea
  158. music

    What is the meaning of the song maria from west side story? What is the meaning of the song sandy from grease

    asked by Courtney
  159. U.S History

    Question: Although they had many new weapons, Civil war generals relied on old battlefield strategies. How might such weapons and tactics affect the outcomes of battles?

    asked by Ah
  160. Statistics

    Is there a rule to figure out if this is a true or false statement? A sample size of 900 is not large enough to conclude that the sampling distribution of p is a normal distribution, when the estimate of the population proportion is .995.

    asked by none
  161. Life Science (Desperate)

    What bird is like a drink of water? ***Is it a swan?***

    asked by Bridgett
  162. math

    Write in miles per hour. Round to the nearest tenth. 3.7 mi/min

    asked by Anonymous
  163. Physics

    A mechanic pushes a 3.6 multiplied by 103 kg car from rest to a speed of v, doing 4600 J of work in the process. During this time, the car moves 27.0 m. Neglecting friction between car and road, find each of the following. (a) the speed v m/s (b) the

    asked by sally
  164. math

    2/3 of 5/6 of x = 3/4 of 4/5 of y

    asked by Jenny
  165. Chem Class

    The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2 (A) (M): 0.273 (B) (M): 1.526 Initial Rate (M/s): 2.83 3 (A) (M): 0.819 (B) (M): 0.763 Initial Rate (M/s):

    asked by jack ross
  166. chem

    What are the IUPAC names of the following alkane. CH3CHCH3 I CH3CH2CH2CHCH2CHCH3 I CH3 i thought it was 2-methyl-4-propylheptane but aparently that is wrong. does anyone know the answer?

    asked by rebekah
  167. math

    A math teacher calculates grades as follows:Grade=[2 test averages+quiz average/3] After 3 tests and 2 quizzes your test average is 83 and your quiz average is 89. You took your fourth test today and noticed that your overall average grade has dropped to

    asked by Danica
  168. English-Article

    This is for my magazine on the Hunger Games, I did an article on Sponsers which Katniss and Peeta got the most. Katniss Everdeen is the main character in this book and Peeta is a boy from her same district. Their names were drawn from this glass jar and so

    asked by Sara
  169. eng

    After a taste of the morning coffee that his wife had made, Paul asks, "Did you do something different with the coffee this morning? It tastes a little bit different." "Look," snaps his wife, "if you don't like the taste of my coffee, you can just make it

    asked by rog
  170. social studies

    Do you think Lincoln was right to relieve McClellan of his command after the Battle of Antietam?

    asked by ........
  171. Math

    2/3 of 5/6 of xis the same as 3/4 of 4/5 of y. What is the value of x/y as a fraction in lowest terms?

    asked by Jenny
  172. chem class

    The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2 (A) (M): 0.273 (B) (M): 1.526 Initial Rate (M/s): 2.83 3 (A) (M): 0.819 (B) (M): 0.763 Initial Rate (M/s):

    asked by jack ross
  173. Physics

    Yep its me again... sorry for re-posting this question but I am quite desperate here and I need to have this question answered, sorry if that sounds rude. IF 2.0 J of work is done raising g apple how far is it lifted? I know W= Fd hence I divided instead

    asked by Edwin
  174. chemistry

    calculate the work done when 50.0g of tin dissolves in excess acid at 1.00 atm and 25 degrees c.

    asked by veronica
  175. English

    Can you help me paraphrase the poem "A Dirge" by P.B. Shelley? Thank you very much! 1)A dirge is a song that is sung at a funeral. The poet piles one image of nature upon another to describe the grief he feels. (It is normally assumed that in this poem

    asked by Franco
  176. U.S History

    How was the war in the East different from the war in the West?

    asked by ah
  177. Physics

    The height of a certain waterfall is 33.2 m. When the water reaches the bottom of the falls, its speed is 25.8 m/s. Neglecting air resistance, what is the speed of the water at the top of the falls?

    asked by Xavier
  178. Physics

    A roller coaster (340. kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long

    asked by Xavier
  179. Physics

    A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 35.0 m/s. The bat does Wnc = 65.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above

    asked by Xavier
  180. Physics

    In an action-adventure movie, the hero lifts the 89-kg villain straight upward through a distance of 2.0 m in 0.47 s at a constant speed. What power does the hero produce while doing this?

    asked by Xavier
  181. Physics

    For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. Each time the heart beats, blood is pushed

    asked by Xavier
  182. Physics

    The lead female character in the movie Diamonds Are Forever is standing at the edge of an offshore oil rig. As she fires the gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.005 kg, and its velocity is +726 m/s. Her

    asked by Xavier
  183. Physics

    Adolf and Ed are wearing harnesses and are hanging from the ceiling by means of ropes attached to them. They are face to face and push off against one another. Adolf has a mass of 117 kg, and Ed has a mass of 77 kg. Following the push, Adolf swings upward

    asked by Xavier
  184. Physics

    A cue ball (mass = 0.150 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.45 N·s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second

    asked by Xavier
  185. chem

    Give the general formula for any dialkene; that is, a straight-chain hydrocarbon with two double bonds along the chain. (Type your answer using the format CnHn+1 for CnHn+1.) I know just alkene would be CnH2n but im not sure how to make it with the

    asked by rebekah
  186. Physics

    A 0.030-kg bullet is fired straight up at a falling wooden block that has a mass of 5.0 kg. The bullet has a speed of 700 m/s when it strikes the block. The block originally was dropped from rest from the top of a building and had been falling for a time t

    asked by Xavier
  187. Physics

    A two-stage rocket moves in space at a constant velocity of 4650 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1240-kg upper stage is 5640 m/s in the same

    asked by Xavier
  188. Physics

    A 60.5-kg person, running horizontally with a velocity of +3.76 m/s, jumps onto a 10.4-kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. m/s (b) The

    asked by Xavier
  189. Physics

    A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction

    asked by Eden
  190. phy

    a 25 kg rod has a box hanging from it and is suspended from the ceiling by the string. The entire system isin equilibrium. Calculate the tesnion in the string and calculate the mass of the box

    asked by ami
  191. Physics

    The U.S army's parachuting team, the Golden Knights, are on a routine jumping mission over a deserted beach. On a jump, a 65 kg Knight lands on the beach with a speed of 4.0 m/s, making a .20 m deep indentation in the sand. With what average force did the

    asked by c
  192. history

    During the Great Depression did FDR help the economy? Can't decide, since he did try

    asked by Amy
  193. healthcare

    What is the most important role or function for a health care manager in motivational theory?

    asked by sam
  194. 9th grade, science

    How to reverse a mixture of copper sulphate and distilled water? I know its a physical change but have no clue on how to reverse it!

    asked by Javal
  195. english

    4. Which of the following sentences contains “passive voice?” (Points : 1) The airplane was wrecked by the wind. The wind wrecked the airplane. The cat chased the mouse. The bird flew after the balloon. a, b, c

    asked by cc
  196. chemistry

    A 100.0 mL portion of 0.250 M calium nitrate solution is mixed with 400.0 mL of .100M nitric acid solution. What is the final concentration of the nitrate ion?

    asked by alex
  197. chemistry

    50 ml of.10 M HNO3 is added to 50 ml of .2M CaCl2. Calculate amount of precipitate formed?

    asked by thomas richards
  198. college

    find (FxG)(X) and (GxF)(X) when f(x)=5x^2-1 and g(x)=2/x

    asked by lexi
  199. ap chem

    What volume of 5M HF will 4g Ca react completely according to the reaction Ca+2HF-->O+CaF2+H2

    asked by josh sears
  200. Physics

    Now assume that the pitcher in Part D throws a 0.145-kg baseball parallel to the ground with a speed of 32 m/s in the +x direction. The batter then hits the ball so it goes directly back to the pitcher along the same straight line. What is the ball's

    asked by Eden
  201. algebra

    find (FxG)(X) and (GxF)(X) when f(x)=5x^2-1 and g(x)=2/x

    asked by lexi
  202. english

    Can someone please show me an example of alliteration and small definition?

    asked by angel
  203. phsyics

    A compact disk, which has a diameter of 12.0 cm, speeds up uniformly from zero to 2.50 rev/s in 2.10 s. What is the tangential acceleration of a point on the outer rim of the disk at the moment when its angular speed is the following values? (a) 2.00 rev/s

    asked by mary
  204. math Please check

    Write an equation for a parabola with vertex(-2,4) and passing through (-1,8)? y=a(x+2)^2+4 8=a(1)+4 4=a

    asked by Sandi
  205. college

    Organic chemistry question. I need help with a couple of questions on organic groups. What are some products that contain: Alkynes, Aromatic (benzene), Ethers, Aldehydes, Ketones, and Acids. I also need to know some of the harmfull effects that each one of

    asked by Tom
  206. Science

    Example of a physical change that has a colour change?

    asked by Javal
  207. physics

    A large 22 cm marble rolls from rest down an incline. Its center has a linear acceleration of 2.5 m/s^2...What is the angle of the incline? It's angular accel is 22.7 rad/s^2 (if that helps and IF I'm correct!).

    asked by Anonymous
  208. Chemistry

    What minimum number of moles of NH4Cl must be added to 1.0 liter of solution that is 0.10 M in Mg(NO3)2 and 1.0 M in NH3 to prevent precipitation of Mg(No3)2?

    asked by Ana
  209. Chemistry

    A mass of 0.2 kg is attached to a spring of negligible mass. I the mass executes simple harmonic motion with a period of 0.5 s, what will be the spring constant/ Can I use the following formula to solve this problem k = (4pi square x mass) / T square

    asked by Jay
  210. english

    I would then choose... The airplane was wrecked by the wind.

    asked by cc
  211. Physics

    Two identical cars are traveling at the same speed. One is heading due east and the other due north, as the drawing show. What is true regarding the kinetic energies and momenta of the cars?

    asked by david
  212. chemistry

    A 100.0 mL portion of 0.250 M calium nitrate solution is mixed with 400.0 mL of .100M nitric acid solution. What is the final concentration of the nitrate ion? BOB PURSLEY PLEASE EXPLAIN MORE THOROUGHLY HOW YOU GOT THE NITRATE ION TO BE .5M

    asked by alex
  213. Physics

    A disk with a mass of 18 kg, a diameter of 50 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force,

    asked by Donny
  214. Physics

    A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction

    asked by Eden
  215. physiscs

    mass of 0.2 kg is attached to a spring of negligible mass. I the mass executes simple harmonic motion with a period of 0.5 s, what will be the spring constant/ Can I use the following formula to solve this problem k = (4pi square x mass) / T square

    asked by Jay
  216. science

    a piece of furniture that weighs 500 newtons is pushed along the ground for a distance of 10 meters then lifted 2 meters above the ground into a truck. how much work is done if the force required to push the furniture is 150 newtons?

    asked by elizabeth
  217. art history

    who was Unraed in midieval times

    asked by Anonymous
  218. English

    "Your prompt action in providing the information by tomorrow would be appreciated." Is the above sentence correct?

    asked by ann
  219. physics

    A military helicopter on a training mission is flying horizontally at a speed of 70.0 m/s and accidentally drops a bomb (fortunately not armed) at an elevation of 320 m. You can ignore air resistance. (a) How much time is required for the bomb to reach the

    asked by Anonymous
  220. Science

    Are any of the bellow chemical changes reversible? If yes, then how? Mixture of Lear Nitrate and Potassium Iodide Mixture of Copper Sulphate Solution and Iron Mixture of Copper Sulphate Solution and Sodium Carbonate Mixture of Dilute Hydrochloric Acid and

    asked by Javal
  221. chemistry

    In a titration, 3.4 g of an acid (HX) requires 21.5 mL of 0.85 M NaOH(aq) for complete reaction. What is the molar mass of the acid? Answer in units of g/mol. im not really sure how to even start... but i calculated the moles of NaOH which i got to be .018

    asked by Lulu
  222. geometry

    d is between ce=6x cd=4x+8 de=7 units find ce

    asked by jessie
  223. Math

    this pattern represents the square numbers 1,4,9,16,25,36 diagram to explain square numbers. pls. help

    asked by Carol
  224. math

    -2(x+3)=-24

    asked by rose
  225. Physics

    Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. A friend throws Olaf a ball of mass 0.400 kg that is traveling horizontally at 10.4 m/s. Olaf's

    asked by Eden
  226. physics.

    A jogger runs 59 m due west, then changes direction and runs 83 m due north. What is the distance the jogger travels?

    asked by Haley
  227. trig

    prove this (1+cosx)/(1-cosx)=(1+secx)/(secx-1)

    asked by jj reddick
  228. chem-repost

    I ddin't know if anybody would look far down to page to help me answer my question but this is what was said so far. Posted by rebekah on Sunday, October 24, 2010 at 4:48pm. Give the general formula for any dialkene; that is, a straight-chain hydrocarbon

    asked by rebekah
  229. Physics

    Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. A friend throws Olaf a ball of mass 0.400 kg that is traveling horizontally at 10.4 m/s. Olaf's

    asked by Nikohl
  230. physics

    4. An ice skater pulls three small children, one behind the other, with masses 25kg, 31 kg and 35kg. Assume that the ice is smooth enough to be considered frictionless, determine: a) the total force applied to the train of children if they reach a speed of

    asked by Sandy
  231. math

    I'm in 5th grade pls. help. Amanda has a collection of X, Y and Z. Every X is a Y. One half the Z's are Y's. There are 3 times as many Y's as X's. Amanda has 50 Z's and 40 X's. No Z is an X. How many Y's does Amanda have that are neither X's nor Z's?

    asked by Carol
  232. Physics

    A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

    asked by Ashley
  233. Univesity of Phoenix

    With which of the motivation theories do you agree most? With which of the theories do you agree least? Explain your position.

    asked by Wanda
  234. PHYSICS

    A driver of a 7400 N car passes a sign stating "Bridge Out 30 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume

    asked by spencer
  235. Stats-BOB PURSLEY Help, do you know this?

    Is there a rule to figure out if this is a true or false statement? A sample size of 900 is not large enough to conclude that the sampling distribution of p is a normal distribution, when the estimate of the population proportion is .995.

    asked by help
  236. Chemistry

    Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 95.0oC and a mass of 67.0 g is dropped into a beaker of water containing 100 g at a temp. of 30.0oC. If the

    asked by christine
  237. physics.

    The x component of a certain vector is -86.0 units and the y component is +75.0 units. What is the magnitude of the vector?

    asked by Haley
  238. College Chemistry

    elements in which group form -2 ions

    asked by Sally
  239. math

    a bike shop has 8 red, 5 blue, 12 black, and 9 white bikes. write an expression that shows how many more black bikes than red bikes there are.

    asked by pam
  240. Physics

    A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction

    asked by Eden
  241. Physics

    The knot at the junction is in equilibrium under the influence of four forces acting on it. The F force acts from above on the left at an angle of with the horizontal. The 6 N force acts from above on the right at an angle of 47◦ with the horizontal. The

    asked by Kaitlyn
  242. AP chemistry

    We have an aqueous solution that contains 22% (by mass) of a hypothetical solute Z. The formula weight of the solute Z is 173 g/mol. The density of the solution is observed to be 1.4 g/mL. What is the molarity of Z in this solution? Answer in units of

    asked by Anonymous
  243. chemistry

    For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 44.8molesc3h8

    asked by Lillian
  244. Cultural Anthropology

    How has this social institution of Family affected the culture of "North America," of "Asia," and/or "Europe

    asked by Randall
  245. Ochem Lab

    why is it important to spot samples directly on the marks made on the TLC plate? This is for Thin Layer Chromotography. Is this important so that the solvents move directly up the plate and can be identifies easily? Thanks

    asked by Adam
  246. help

    arrange in ascending order 7/22, 2/5, 10/24 what is the prime factorization of 87750 in exponent form

    asked by Anonymous
  247. lab

    show me how to answer a question like this A chemical solution contains 40% grain. How much grain is in 35.5ml of a solution

    asked by Anonymous
  248. economics

    if ad1 and as1 are the before curves and ad2 and as2 are the after curves how is this graph set up

    asked by misty
  249. Chemistry

    How much Ba(OH)2 is needed to neutralize 3.2 moles of H2SO4 and 4.5 moles of HCl mixed together in 755 mL of water?

    asked by Lindsay
  250. English

    I need to identify the gerund or gerund phrase and identify it as a subject, a predicate noun, a direct object, or an object of a preposition. Or identify the sentence as one with no gerund. I need help with the following sentences. 1. It was time for

    asked by Sandi
  251. Chemistry

    Calculate the [H3O+] of the following polyprotic acid solution: 0.145 M H3C6H5O3?

    asked by Anonymous
  252. Chemistry

    In an excess of NH3(aq), Cu2+ ion forms a deep blue complex ion, Cu(NH3)4^2+ (Kf=5.6x10^11). Calculate the concentration of Cu2+ in a solution adding 5.0x10^-3 mol of CuSO4 to .5 L of .4 M NH3

    asked by Bam
  253. AP Chemistry

    When 23.5 moles of calcium acetate are dissolved in enough water to make 825.9 milliliters of solution, what is the molarity of acetate ions? Answer in units of M.

    asked by Anonymous
  254. physics

    the change of velocity of an automobile during a 5.0-s period is 20m/s in the due easterly direction. What is the magnitude and direction of its average acceleration

    asked by Kevin Chen
  255. physics

    The x component of a certain vector is -86.0 units and the y component is +75.0 units. The magnitude of the vector is 114 m. What is the angle between the direction of the vector and the positive direction of x? Use the convention that positive angles are

    asked by Sydney
  256. College Chem

    How many calories of energy are needed to vaporize a 20.2 g sample of liquid ethanol at its normal boiling point of 78 oC?

    asked by Sam
  257. math

    prime factorization of 87750 in exponent form how do I start with this

    asked by Anonymous
  258. Mathematics for Liberal Arts

    Using a standar deck of 52 cards, what is the probability of drawing four cards of the same number(eg.four aces, 4 kings, four 2s, four 3s,etc)?

    asked by Sasha
  259. astronomy

    Fill in the blank: The Earth may have gained its water and volatile gases from collisions with _______ .

    asked by Ally
  260. College Chemistry

    Of KCl and NaCl, which has a higher lattice energy? What is lattice energy? Lost. Please help.

    asked by Sally
  261. Pre-Calculus Algebra

    A building is 2 ft from a 9-ft fence that surrounds the property. Worker wants to wash window in the building 13 ft from the ground. He wants to place ladder over fence so it rests against the building. He decides he should place the ladder 8 ft from the

    asked by anonymous
  262. Journalism

    We are currently studying censorship. At my school, a recent incident occured, and I want your opinion of whether it qualifies as censorship. An editorial was written about an occurence at my school, which resulted in disciplinary action. One line in the

    asked by Brandon
  263. Physics

    A bullet is fired horizontally from a height of 78.4m and hits the ground 2400 m away. With what velocity does the bullet leave the ground?

    asked by Steve smith
  264. History

    who is the KKK?

    asked by Rebecca
  265. physics

    A boy standing on top of a hill throws a stone horizontally. The stone hits the ground at the foot of the hill 2.5 s later. How high is the hill ?

    asked by Steve smith
  266. social studies

    why is the south in more danger from hurricanes than the Midwest or the Northeast?

    asked by tony
  267. science

    Is Saturn's orbit more elliptical and it's tilt larger than Jupiter's?

    asked by jenna
  268. physics

    A package in an airplane moving horizontally at 150m/s is dropped when the altitude is 490m. (a) How long does it take the package to fall to the ground ? (b)How far forward from the spot over which it was dropped does the package land ? (c) What kind of

    asked by Anonymous
  269. Chemistry

    At 25 C, the pressure and volume of a gas are 1.2 atm and 33 L. What is the volume of the gas at STP?

    asked by Meri
  270. statistics

    The caffeine content of a cup of home-brewed coffee is a normally distributed random variable with a mean of 115 mg with a standard deviation of 20 mg. (a) What is the probability that a randomly chosen cup of home-brewed coffee will have more than 130 mg

    asked by Alejandra
  271. English-Article on the Hunger Games

    This is for my magazine on the Hunger Games, I did an article on Sponsers which Katniss and Peeta got the most. Katniss Everdeen is the main character in this book and Peeta is a boy from her same district. Their names were drawn from this glass jar and so

    asked by Sara
  272. AP Physics

    An object has a mass of 80 kg on earth. the acceleration of gravity on Mars is about 1/4 of the acceleration of gravity on Earth. What is the weight of the object on Mars?

    asked by Betsy
  273. 8th grade

    mr. macho ate 125 hotdogs over a five day peroid each day he ate seven more hotdogs than the previous day. how many hot dogs did he eat on the first day.

    asked by bill
  274. chemistry class

    i posted this question a few minutes ago i tried to solve it on my own can someone check if my work is okay? The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2

    asked by jack ross
  275. social studies

    why is the Northeast coast so crowded with cities?

    asked by Beth
  276. social studies

    Why are there so many national parks in the West?

    asked by Trent
  277. Philosophy

    Choose the pair of words/phrases among the choices that exhibits the same logical relationship as the words/phrases in the following pair. building : blueprint (Points : 1) ship : sea cake : recipe bridge : island guitar : song

    asked by Dean
  278. chemistry

    what is the difference between specific heat and heat capcacity?

    asked by amber
  279. Physics

    A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

    asked by PLEASE HELP
  280. Biology

    In detail can someone please explain to me how cooking eggs makes them safe to eat in connection with enzymes Thank you

    asked by carly
  281. weather of Oct. 23, 2010

    what is the moonrise and moonset of October 23, 2010?

    asked by Anonymous
  282. government

    How would you reply to a political cynic?

    asked by jj reddick
  283. 9th grade

    How long was Ibn Battuta's journey from Andalusia and Morocco

    asked by Shanqua
  284. american studies

    henry hudson

    asked by bob
  285. social studies

    What arguments might be made for banning or allowing drilling for oil?

    asked by Holly
  286. 9th grade

    In the odyssey, what is book 16, 17, 21, 22, and 23 about in a short summary? Also explain the conflict. Some Traits of an epic hero also. Please help!!!

    asked by k
  287. AP chemistry

    A solution of sodium hydroxide is standard- ized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.894 g; buret reading before titration 0.13 mL;

    asked by Anonymous
  288. Biology

    In detail can someone please explain to me how cooking eggs makes them safe to eat in connection with enzymes Thank you I understand that enzymes are killed because of the heat as it is a factor in destroying the enzymes activity but how does this explain

    asked by carly
  289. us history

    True or False: The three-fifths compromise called for three fifths of a states LANDLESS CITIZENS to be counted as population.

    asked by Jen
  290. us history

    True or False: The constitution assigns responsibility for carrying out laws to the JUDICIAL branch.

    asked by Jen
  291. chemistry

    At what temperature does the rms speed of Cl2 molecules equal 401 m/s?

    asked by caroline
  292. chemistry

    Raoul Pictet, the Swiss physicist who first liquefied oxygen, attempted to liquefy hydrogen. He heated potassium formate, KCHO2, with KOH in a closed 2.50 L vessel. KCHO2(s) + KOH(s) → K2CO3(s) + H2(g) If 50.1 g of potassium formate reacts in a 2.50-L

    asked by caroline
  293. chemistry

    A sample of a breathing mixture for divers contained 34.3% helium, He; 51.7% nitrogen, N2; and 14.0% oxygen, O2 (by mass). What is the density of this mixture at 22°C and 748 mmHg?

    asked by caroline
  294. chemistry

    A mixture contained zinc sulfide, ZnS, and lead sulfide, PbS. A sample of the mixture weighing 6.12 g was reacted with an excess of hydrochloric acid. The reactions are given below. ZnS(s) + 2 HCl(aq) → ZnCl2(aq) + H2S(g) PbS(s) + 2 HCl(aq) → PbCl2(aq)

    asked by caroline
  295. chemistry

    Calculate the [H3O+] of the following polyprotic acid solution: 0.145 M H3C6H5O3?

    asked by Anonymous
  296. chemistry

    Glauber's salt undergoes a phase transition according to the following equation: Na2SO4*10H2O(s)--> Na2SO4*10H2O(l) DH = 74.4 kJ/mol Calculate the mass (g) of Glauber's salt (use the masses to two decimal places found in the front of your text) needed to

    asked by karen
  297. 5th grade

    What Is The Simple Subject Of This Sentence? The Eerie, High Pitched Whistling Got Louder And Louder As We Neared The Empty House.

    asked by Kam
  298. Chemistry

    If 4.0 g of hydrogen and 10.0 g of oxygen are mixed according to the equation 2 H2 + 02 = 2 H20, which is the limiting reagent? 1. none, they are evenly mixed 2. oxygen 3. hydrogen 4. water

    asked by Mike
  299. Early Childhood Education

    Support evidence of this accustion: "relationships" promotes positive relationships among all children and adults to encourage each childs sense of individual worth and belonging as a part of a community and to foster child ability to contribute as a

    asked by LaTrese
  300. geometry

    How would you figure this question out? :The measures of two sides of a triangle are 8 and 11. Use an inequality to express the range of the third side, m.

    asked by jordan
  301. Algerbra

    The range of the function y=3x-2 is 1, 7, 13, 16 , and 19. Which number is in the domain of the function ?

    asked by Lynn
  302. business-location

    Ready Mix Concrete Company is planning on developing new markets in a growing community. It had recently acquired large orders in three locations: downtown, at a mall, and in a suburb. The destinations and loads to be delivered are the following: Delivery

    asked by Claire
  303. science

    what is the name for (NH4)2C2H3O2

    asked by morgan
  304. chemistry

    I really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l)

    asked by christine
  305. college chemistry

    Use the thermochemical equations shown below to determine the enthalpy (kJ) for the reaction: H2SO3(l)=>H2S(g) + 3/2O2(g) H2SO3(l)=>H2O(l) +SO2(g) DH=62KJ SO2(g)=>S(s) + O2(g) DH=297KJ H2S(g) + 1/2O2(g)=>S(s) + H2O(l) DH=-155KJ

    asked by sara
  306. physics

    a child on a merry go round at 1.5 m is moving ______ times faster than child at .5 m

    asked by bear
  307. physics

    From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. h is 0.54 m and

    asked by Gabbi
  308. chemistry

    For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 44.8molesc3h8

    asked by Lillian
  309. physics

    a merry go round wheel rotates with an angular speed of 2 rad/s. consider two children on the wheel, one standing .5 m and the other 1.5 m away from the center of the wheel. the chid at 1.5 m distance is moving__________ times faster than the child at .5 m

    asked by bear
  310. physics

    A 1600 kg car travels at a speed of 10.5 m/s. What is its kinetic energy? Assume that air resistance is negligible.

    asked by Derek
  311. Calculus

    Differentiate. y= u(a cos u + b cot u) I am not sure if this correct. I was not sure whether to leave the variables as are or where the negatives should be placed? (u)*(- a sin u - b csc^2 u) + (a cos u + b cot u)*(1)

    asked by CMM
  312. high school

    A passenger in a helicopter traveling upwards at 27 m/s accidentally drops a package out the window. If it takes 17 seconds to reach the ground, how high to the nearest meter was the helicopter when the package was dropped?

    asked by Anonymous
  313. AP Physics

    A stone is tied to a string (length = 0.450 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

    asked by PLEASE HELP
  314. Chemistry

    You have a .200M solution of NaCl. if you pipette 2.00 mL of the solution into a 25mL volumetric flask and dilute it to the mark, then what is the molarity of the new solution

    asked by mikey
  315. HELP

    Discuss why the media is more than juste entertainment

    asked by maribel
  316. 6th grade

    What type(s) of friction oppose the motion of a fast-moving car on a road?

    asked by Mari
  317. biology

    how is it that some Archaebacteria live in the hot springs of Yellowstone Park at temperatures as high as 73C

    asked by sam
  318. biology

    How would you design an experiment to determine the osmolarity (amount of water) in an egg?

    asked by Jannet
  319. Physics

    Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following

    asked by Kyle
  320. Physics

    Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following

    asked by Kyle
  321. Statistics

    In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the same way.

    asked by Ben
  322. Calc

    Find h'(2), given that f(2)= -3, g(2)= 4, f'(2)= -2, and g'(2)= 7 d) h(x)= g(x)/(1 + f(x)) What would the formula be? Normally it is (f/g)'= (gf' - fg')/g^2 But in this case, it is (g/f)'

    asked by Chelsea
  323. Physics

    Two cars travel westward along a straight highway, one at a constant velocity of 85 km/hr, and the other at a constant velocity of 115 km/hr. a) Sketch the velocity vs. time graph for both cars and paste your sketch in the space below. b) Assuming both

    asked by grace
  324. pre-algebra

    it takes 1 cup of liqiud fertilizer to make 7 1/2 gallons of spray. How much liquid is needed to make 80 gallons of spray?

    asked by Nick
  325. English

    Make an advertisement on medicine. All in one Tynenol. Relieves you from headache, stomach pain, chest pain, etc. Get it now. how can i make my advertisement seem more powerful?

    asked by Teressa
  326. college

    HCL+NaOH=Ch3OOH+NaOH

    asked by RC
  327. Statistics

    n a hospital 24 operating rooms were sampled. The mean noise level was 41.6 decibels and the standard deviation was 7.5. What is the 95% confidence interval of the true mean of the noise levels in the operating rooms? If possible, can you list the steps

    asked by Tony
  328. pre-algebra

    what is 6 divided by 1 5/16?

    asked by Nick
  329. algebra

    -144y/-24 simplified = 6 is this correct?

    asked by Mari
  330. Physics

    A. Use the relation 2 m m m GM g R ƒ­ to find the acceleration due to gravity on the surface of the Moon. You can use the following data: Mass of the Moon m M = 7.35 ¡Ñ 1022 kg. Radius of the Moon m R = 1.74 ¡Ñ 106 m. B. How does this value compare

    asked by Anonymous
  331. chemistry

    The reaction CH3- N≡C → CH3- C≡N is a first-order reaction. At 230.3°C, k = 6.29 x 10^-4 s^- 1. If [CH3 -N≡ is 1.00 x 10^-3 initially, C] [CH3-N ≡ C] is __________ after 1.000 x 10^3 s. A) 5.33 x 10^-4 B) 1.00 x 10^-6 C) 4.27 x 10^-3 D) 2.34 x

    asked by jes
  332. grade 9 algebra

    8x-5y-x=9-y

    asked by matt
  333. pre-algebra

    simplify: (-8)(x/-2) i know that -8/-2=4, but does it come out as 4x or 4=x?

    asked by Taylor
  334. physical science

    A chair lift holding a 100 kg man rises 5 meters in height in 10 second time period. Ignore the weight of the chair and related machinery and answer the following: What is the weight (force exerted by his mass) of the man, in Newtons?

    asked by love
  335. Statistics

    For a sample group of 22, the mean is 86 with a standard deviation of 5. What is the 90% confidence interval of the true mean of the sample? Can you please explain the steps you used to get the answer. Thanks.

    asked by Anon
  336. pre-algebra

    can I simplify -4w/4

    asked by Taylor
  337. math

    Jamal is fencing a rectangular field that measures 37 ft by 27 ft. How much fencing should he buy?

    asked by Angie
  338. Science

    How are the nucleus, genetic material, chromosomes, genes, DNA, and base pairs interrelated?

    asked by Summer
  339. LINEAR ALGEBRA

    How to prove or disprove (a)if A has a zeronentryonthe diagonal then A is not invertible (b)if Ais not invertible then for every matrix B, AB is not invertible (c)if A is a nonzero 2X2 matrix such that A^2+A=0, then A is invertible

    asked by LEON
  340. Liberal arts math

    1) A lottery draws six numbers from 42 possibilities, without regard to order. What is the total number of possible results of the drawing. In the lottery from the before, what is the probability that you pick the winnin number? In the Lottery from number

    asked by Jamie
  341. Physics

    For some reason I keep getting this problem wrong. Please Help! A helicopter is ascending vertically with a speed of 9.00 m/s. At a height of 90 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the

    asked by Rose
  342. chemistry

    how many grams of sodium chloride do you need to prepare 250 mL of a 5.00% sodium chloride solution?

    asked by Anonymous
  343. chemistryyy

    what are metallic bonds?

    asked by Anonymous
  344. chemistry 101

    how much energy is released when 10 g of steam at 100 degrees celsius is condensed and cooled to body temperature?

    asked by katie
  345. Physics

    The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 114 kgand radius R = 80 cm.The engine rotates the wheel at 540 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad

    asked by Donny
  346. physics

    An east-west oriented conducting bar 2.0 m long moves north at 20 m/s through a magnetic field of 0.017 T, directed downward. What is the strength and direction of the electric field generated in the bar?

    asked by angela
  347. English

    1. I have helped an old lady carry a big bag. 2. I have helped an elderly person cross a street. 3. I helped a foreigner find a subway station. 4. I have helped an Englishman go to a police station. 5. I have helped a stranger find a bookstore. 6. I have

    asked by rfvv
  348. College Physics

    A multiple loop configuration is rotating at 60 Hz in a magnetic field of 0.12 T. The coil has an area of 0.0052 m2. How many coil loops are required to produce a maximum voltage difference of 170 V?

    asked by charlie
  349. College Physics

    A mass of 0.4 kg, hanging from a spring with a spring constant of 80 N/m, is set into an up-and-down simple harmonic motion. What is the velocity of the mass when at its maximum displacement of 0.1 m?

    asked by charlie
  350. English

    1. I liked the work very much because I could help orphans who needed love. 2. I liked the work very much because I could help children who had no father and mother. 3. I liked the work very much because I could help orphans who needed care. 4. I liked the

    asked by rfvv
  351. chemistry

    how many mL of the above 5.00% solution are needed to make 100 mL of physiologic saline (.90 sodium chloride)?

    asked by Anonymous
  352. chemistry

    How many grams of calcium nitrate, Ca(NO3)2, are needed to make 100 mL of a .5 M solution?

    asked by Anonymous
  353. English

    The famous words of president Bill Clinton after realizing how school uniforms would positively affect our public schools That sentence is a fragment, how can I fix it? Thanks!

    asked by Sarah
  354. Physics

    what is calculus

    asked by TaNisha
  355. Algebra

    I'm soo confused on how to solve this prboblem. x+5/8x-3 = 11/2

    asked by Angel
  356. English

    Neither the Senator nor the Representative could defent their position

    asked by Alayasia
  357. Statistics

    find the 90% confidence interval for the variance and standard deviation of a sample of 16 and a standard deviation of 2.1 Assume the variable is normally distributed.

    asked by Anon
  358. Geometry

    Please write a paragraph proof for this statement. 30: Point Y is the midpoint of segment XZ. Z is the midpoint of segment YW. PRove that segment or line XY is congruent to segment or line ZW.

    asked by Shamaree
  359. college

    How can American consumers influence decision makers on fiscal policies? Explain and discuss if and how this has changed over the past 5 years. Post your response on the Discussion Board. Comment on other postings.

    asked by Sabrina Candler
  360. college

    I need help on how to figure out what is the tax rate for 5.8% on 107,700.00 for social security

    asked by norma casarez
  361. Geometry

    Please write a paragraph proof for this statement. Point Y is the midpoint of segment XZ. Z is the midpoint of segment YW. PRove that segment or line XY is congruent to segment or line ZW.

    asked by Shamaree
  362. Algebra

    I need help. 6/x-3 + 2x/x^2-9 = 1/x+3

    asked by Angela
  363. English

    What patriotism means to me? any good ideas on what to say?

    asked by Ashley
  364. college english

    I need help figuring out what this poem means. Thanks Analysis of a Sound in the Middle of the Night by Nicole Brossard time free-falling in my arms, I await night the midpoint of midnight life stretches out palm tree silence unrecognizable in the folds of

    asked by Alyssa
  365. french

    Does this make sense? Is there anything I should change to make it betetr, or sentences to add to it? Thank-you very much! Bonjour! Je m’appelle Kiki et je suis la fille de votre cousine, Viv! J’habite en Nouvelle Zélande et j’apprends le français

    asked by Kiki
  366. chem

    I need to know how to write an equation showing how a buffer containing ammonia and ammonium chloride neutralizes added acid of HNO3.

    asked by moe
  367. Chemistry (geometric)

    Calculate the number of cations anions, and formula units per cell unit of the following : rock-salt structure, and flourite....I have no idea how to do the second one but for the first one I got 13, 14, and 13.5 respectively. Also, what are the

    asked by Sarah
  368. English

    1.When Miss Darcy arriveed, everyone had gone home 2 What were the names of the men on the committee?

    asked by Alayasia
  369. Calc

    If f(x)= sec x, find f"(Pi/4) I am not sure how to take the 2nd derivative? f'(x)= sec x tan x f"(x)=??? Is it f"(x)= (sec x tan x)(sec^2x)??? Please Help!

    asked by CMM
  370. algebra

    Describe two laws of exponents and provide an example illustrating each law. Explain how to simplify your expression. How do the laws work with rational exponents? Provide the class with a third expression to simplify that includes rational (fractional)

    asked by Anonymous
  371. CHEMISTRY

    really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l)

    asked by christine
  372. geomertyy .

    when all four strings are parallel the the pole, how can you be sure the pole is vertical .

    asked by maddy .
  373. Chemistry

    How do you work this one problem? Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of

    asked by christine
  374. trig

    suppose sin(x)=4/5 and cos(y)=-12/13, and x and y are in the second quadrant. determine the value of each expression: sin(x+y), cos(x-y), cos2x, sin2y.

    asked by jj reddick
  375. chemistry

    how in the world do you do this problem? Use the thermochemical equations shown below to determine the enthalpy (kJ) for the reaction: H2SO3(l)=>H2S(g) + 3/2O2(g) H2SO3(l)=>H2O(l) +SO2(g) DH=62KJ SO2(g)=>S(s) + O2(g) DH=297KJ H2S(g) +1/2O2(g)=>S(s) +

    asked by anonymous
  376. physics

    A blue puck with a mass of 3.90×10−2 , sliding with a speed of 0.170 on a frictionless, horizontal air table, makes a perfectly elastic, head-on collision with a red puck with mass , initially at rest. After the collision, the velocity of the blue puck

    asked by Anonymous
  377. chemistry

    Calculate the change in internal energy for a system that absorbs 242 J of heat and does 193 J of work on the surroundings...

    asked by kellie
  378. chem

    What would happen to the specific heat if some of the warm metal shot were lost during the transfer to the calorimeter? Answer a. It would not affect the calculated value of specific heat b. It would cause the calculated value of specific heat to be

    asked by kellie
  379. phsics

    A block is at rest on an inclined plane whose elevation can be varied. The coefficient of static friction is μs= 0.4, and the coefficient of kinetic friction is μk = 0.16. The angle of elevation θ is increased slowly from the horizontal. At what value

    asked by help
  380. Physics

    The record number of boat lifts, including the boat and its ten crew members was achieved by Sami Heinonen and Juha Räsänen of Sweden in 2000. They lifted a total mass of 653.2 kg approximately 4 in. off the ground a total of 24 times. Estimate the total

    asked by Britney Spears
  381. chemistry URGENT!

    Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist slips and spills the contents of the dewer, 25L, onto the floor. Since the boiling point of liquid nitrogen at 1atm is 77.4 K, all

    asked by mia
  382. pe-algebra

    w(x)+w(x+1)+w(w+3)=38

    asked by Anonymous