Questions Asked on
November 30, 2009

  1. Physics

    In a hydroelectric dam, water falls 26.0 m and then spins a turbine to generate electricity. What is ∆U of 1.0 kg of water? Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must

    asked by Zach
  2. Calc

    The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function below, where I is the light intensity (measured in thousands of foot-candles). P = (120 I) / (I^2 + I + 1) For what light intensity

    asked by Aaron
  3. MATH

    Jones Company had 100 units in beginning inventory at a total cost of $10,000.The company purchased 200 units at a total cost of $26,000. At the end of the year, Jones had 80 units in ending inventory. Compute the cost of the ending inventory and the cost

    asked by ABBY
  4. Statistics

    A car manufacturer is interested in conducting a study to estimate the mean stopping distance for a new type of brakes when used in a car that is traveling at 60 miles per hour. These new brakes will be installed on cars of the same model and the stopping

    asked by Bob
  5. Physics

    A 120 g ball moving to the right at 4.2 m/s catches up and collides with a 450 g ball that is moving to the right at 1.2 m/s. If the collision is perfectly elastic, what are the speed and direction of each ball after the collision?

    asked by Zach
  6. Org. Chem.

    We did an experiment with the synthesis of n-butyl bromide, using n-butyl alcohol, NaBr, and H2SO4. The question is: Aqueous sodium bicarbonate was used to wash the crude n-butyl bromide. A) What was the purpose of this wash? Give Equations. I know it was

    asked by CMM
  7. physics

    Two air-track carts are sliding to the right at 1.0 m/s and held together by a string. The spring between them has a spring constant of 140 N/m and is compressed 4.5 cm. The carts slide past a flame that burns through the string holding them together.

    asked by Zach
  8. Chemistry

    Sodium Chloride is the LEAST soluble in which of the following liquids? a. H2O b. CCl4 c. HF d. CH3OH e. CH3OOH I know NaCl is a polar molecule...and a dipole-dipole IMF bond? My guess is b because it's nonpolar and I think it's a London Dispersion IMF. Is

    asked by Nikki
  9. physics

    Water flows steadily from an open tank into a pipe. The elevation of the top of the tank is 10.2 m, and the elevation at the pipe is 3.90 m. The initial cross-sectional area of the pipe is 6.40×10^−2 m; and at where the water is discharged from the

    asked by AE
  10. physics

    A lobsterman's buoy is a solid wooden cylinder of radius r and mass M. It is weighted on one end so that it floats upright in calm sea water, having density . A passing shark tugs on the slack rope mooring the buoy to a lobster trap, pulling the buoy

    asked by Keith
  11. Calc

    An oil refinery is located on the north bank of a straight river that is 2 km wide. A pipeline is to be constructed from the refinery to storage tanks located on the south bank of the river 3 km east of the refinery. The cost of laying pipe is $300,000 per

    asked by Aaron
  12. space/astronomy

    Rank the objects based on the strength of the gravitational force that would be felt by a spacecraft traveling at a distance of 10 AU from the center of each of the objects, from weakest to strongest. 1)red giant mass: 1Msun radius: 100Rsun 2)sun 3)white

    asked by zack
  13. physics

    One end of a light spring with force constant 300 N/m is attached to a vertical wall. A light string is tied to the other end of the horizontal spring. The string changes from horizontal to vertical as it passes over a solid pulley of diameter 6.00 cm. The

    asked by caroline
  14. physics

    The New River Gorge bridge in West Virginia is a 518 m long steel arch. How much will its length change between temperature extremes -19°C and 39°C? (answer in cm)

    asked by Julie
  15. Org. Chem.

    We did an experiment on the synthesis of n-butyl bromide using n-butyl alcohol and H2SO4. Why does the alkyl halide layer switch from the top layer to the bottom layer at the point where water is used to extract the organic layer? Please Help.

    asked by CMM
  16. physics

    The mass of a carbon atom is 2 x 10 ^ -26. What is the kinetic energy of a carbon atom moving with a speed of 500 m/s? I got 2.5 x 10^-21 which is correct. The second question states: Two carbon atoms are joined by a spring-like carbon-carbon bond. The

    asked by Julia
  17. 7th grade

    Site #3: What in the World - Mystery Photos (from National Geographic) Try at least four different challenges in the “What in the World” category and record your results in the chart. You will need to fill in the chart with the title of the game and

    asked by amit
  18. physics

    A spherical steel ball bearing has a diameter of 2.540 cm at 23°C. (a) What is the diameter when its temperature is raised to 106°C? (b) What temperature change is required to increase its volume by 0.8%?

    asked by Kim
  19. Physics

    A 60-cm-long, 500 g bar rotates in a horizontal plane on an axle that passes through the center of the bar. Compressed air is fed in through the axle, passes through a small hole down the length of the bar, and escapes as air jets from holes at the ends of

    asked by Zach
  20. Fundamentals of Electricity

    The box-like Gaussian surface of Fig. 1 encloses a net charge of +24.0ε0 C and lies in an electric field given by N/C, with x and z in meters and b a constant. The bottom face is in the xz plane; the top face is in the horizontal plane passing through y2

    asked by jojo
  21. Calculus

    Can anyone help me with these two optimization problems? A boat leaves a dock at 9:00 P.M. and travels due south at a speed of 20 km/h. Another boat has been heading due east at 15 km/h and reaches the same dock at 10:00 P.M. How many minutes after 9:00

    asked by Steve
  22. physics

    A box of weight 2N accelerates down a rough plane that is inclined at an angle 30 degrees above the horizontal. The normal force acting on the box has a magnitude 1.7 N, the coefficient of kinetic friction between the box and the plane is O.30, and

    asked by Ashley
  23. Physics

    A 0.15 kg baseball is thrown towards a batter with a velocity of 40 m/s. The batter hits the ball and returns it directly back with a velocity of 60 m/s. What is the change in momentum of the ball?

    asked by Tom
  24. Physics

    The transverse standing wave on a string fixed at both ends is vibrating at its fundamental frequency of 250 Hz. What would be the fundamental frequency on a piece of the same string that is twice as long and has four times the tension?

    asked by Daniel
  25. physics

    What is the pressure change in water going from a 3.0- cm-diameter pipe to a 1.8- cm-diameter pipe if the velocity in the smaller pipe is 3.0 m/s? Im using the equation pv2^2(A2^2-A1^2)/2A1^2 and get (1000)(3)^2(1.8^2-3^20/(2(3)^2) and get -2880 Pa but I'm

    asked by Andy
  26. Physics

    A bicycle is turned upside down while its owner repairs a flat tire. A friend spins the other wheel and observes that drops of water fly off tangentially from point A. She measures the heights reached by drops moving vertically (see figure). A drop that

    asked by Ed
  27. Socials

    What effect did the highland clearances and the Irish potato famine have on canada? Do ayou know anyone of Irish or Scottish ancestry? How and when did their family come ot canada? Pretend you are a scottish or Irish farmer who must immigrate. Write a

    asked by Sara
  28. physic

    HI!can anyone help me please, just on part b.Thank you so much. A spherical steel ball bearing has a diameter of 2.540 cm at 23°C. (a) What is the diameter when its temperature is raised to 94°C? ___ cm (b) What temperature change is required to increase

    asked by Chan
  29. Language Arts

    I writing a topic sentence for a paragraph about "Annabel Lee" by Edgar Allen Poe, and I need to include imagery in it. Can you help me?

    asked by Sanchez
  30. Chemistry

    Exothermic reactions are favored because they release heat to the environment. Would an exothermic reaction be more favored or less favored if it were carried out within a superheated chamber? I don't understand what "favored" means, so I don't understand

    asked by Mary
  31. physcs

    A string is wrapped around a uniform solid cylinder of radius 3.10 cm, as shown in the figure. The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block has mass 16.3 kg, and the cylinder has mass 11.2 kg.

    asked by asefa
  32. Physics

    The transverse standing wave on a string fixed at both ends is vibrating at its fundamental frequency of 250 Hz. What would be the fundamental frequency on a piece of the same string that is twice as long and has four times the tension? I know the equation

    asked by Lydia
  33. math

    still don't get it.....Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six and have just one cookie left

    asked by Katherine
  34. 4th grade

    You need 1/2 cup of sugar to make a three-layer cake. How much sugar would you need for a one-layer cake? Can you help me...thank you

    asked by Mia
  35. Maths

    Solve the differential equation: d2y/dx2 - 2 dy/dx + y = 3sinhx The answer should be: y(x) = e^x (Ax+ B) + ( 3^8 )(2[x^2][e^x] - [e^-x] ) Can someone please show me how to work it out?

    asked by Claire
  36. algebra

    Helen has 1/5 of her prorfolio in U.S. stocks, 1/8 of her porfolio in European stocks, and 1/10 of her porfolio in Japanese stocks. The remainder is invested in muicipal bonds. What fraction of her porfolio is invested in municipal bonds? What percent is

    asked by Diversification
  37. Physics

    A string has a linear density of 6.7 x 10-3 kg/m and is under a tension of 210 N. The string is 1.6 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c)

    asked by Lydia
  38. Social Studies

    What was Jefferson's laissez-faire policy? Can you Give an example of it.

    asked by Francis
  39. English

    1. My favorite book is " the Autobiography of Benjamin Franklin." I love is because I can learn a lot of lessons about living in the world wisely. 2. My favorite book is "the Bible." I love it because I can know the truth about how to live in the world. 3.

    asked by rfvv
  40. physics

    The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. The density of seawater is 1025 kg/m3. (a) If an underwater vehicle were to explore such a depth, what force would the water exert on the

    asked by need help!
  41. math

    Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six and have just one cookie left over in each case.If

    asked by Katherine
  42. physics

    On a cold winter day when the temperature is -20 degrees celsius, what is the amount of heat needed to warm internal body temp(37) the .5 L of air exchanged with each breath? Specific heat of air is 1020 J/(kg K) and that 1.0L air has a mass of 1.3g.

    asked by Joe
  43. HCA220

    I answered several question for an assignment and I need help to understand how I got it wrong. The assignment dwelt medical terms. The following three were marked wrong. Please help! Use the word bank below to build the medical word that corresponds to

    asked by Dan
  44. trig

    (sec(x) / (sec(x)-1)) - (sec(x) / (sex(x)+1)) = 2cot(x)csc(x)

    asked by Sarah
  45. math-probability

    The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?

    asked by GG
  46. Physics

    A 5.50 kg cat leaps from the floor to the top of a 94.0-cm-high table. If the cat pushes against the floor for 0.220 s to accomplish this feat, what was her average power output during the pushoff period?

    asked by Zach
  47. Physics

    Measured along the surface of the water, a rectangular swimming pool has a length of 15.9 m. Along this length, the flat bottom of the pool slopes downward at an angle of 16.9 ° below the horizontal, from one end to the other. By how much does the

    asked by Daniel
  48. French

    I have to think of things, facts, or people I know. I have to write a paragraph about them. Write at least eight sentences, four of which must be in the Passé Composé.Can you check the paragraph and see if its correct and see if i put it in Passé

    asked by Keyanna
  49. Algebra

    The formula R= -0.75t +385 can be used to predict the world record in the 1500-m run t years after 1930. Determine (in terms of an inequality) those years for which the world record will be less than 3.7 min. Solve for t

    asked by matt
  50. Physics

    The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. The density of seawater is 1025 kg/m3. (a) If an underwater vehicle were to explore such a depth, what force would the water exert on the

    asked by Daniel
  51. math

    8. In an interview of 50 math majors, 12 liked calculus and geometry 18 liked calculus but not algebra 4 liked calculus, algebra, and geometry 25 liked calculus 15 liked geometry 10 liked algebra but neither calculus nor geometry 2 liked geometry and

    asked by poo
  52. physics

    find the length of a pendulum that oscillates with a frequency of 1.0 Hz

    asked by abbigail
  53. math

    or this one tracey has 4,300 in his savings account. the money in the account earns 4.6% intrest each year assuming he makes no deposits, how much money will he have in his account atthe end of the year? i don't know how to figure that

    asked by Chris00
  54. algebra

    A cruise ship is traveling in the Atlantic Ocean at a constant rate of 40 mi/h and is traveling 2 mi east for every 5 mi north. An oil tanker is 350 mi due north of the cruise ship and is traveling 1 mi east for every 1 mi south. a. How far is each ship

    asked by Anonymous
  55. physics

    The mass of a carbon atom is 2 x 10 ^ -26. What is the kinetic energy of a carbon atom moving with a speed of 500 m/s? What is the formula I would need?

    asked by Julia
  56. math

    ok i got the multiples of 7 so what do i do next ...Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six

    asked by Katherine
  57. 4th grade

    At one table, some of the students shared 3 pizzas. Each pizza was cut into 8 slices. After the students shared the pizza equally, there were 3 slices left over. How many students shared the pizza? How many slices of pizza did each student eat?

    asked by micaela
  58. Final-Chemistry

    I have finals coming up in a week and a half. I know I should have started studying earlier, but I just had an exam in my chem class and was focused on getting the information for that exam mastered before I started studying for the final. Now, I'm

    asked by Katherine
  59. math

    Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six and have just one cookie left over in each case.If

    asked by Katherine
  60. chemisty

    2C2H2(g)+5O2(g)=4CO2(g)+2H2O(g) If 50.0 mols of carbon dioxide were produced, how many mols of acetylene (C2H2) were used?

    asked by michela
  61. French

    In this assignment, answer the questions below in complete sentences, with logical responses. But I don't know some of these questions. So can you see if I did these correctly in French. **Qu'est-ce que tu as bu hier? French:J'ai eu un peu de jus d'orange

    asked by Keyanna
  62. Math

    Write an equation in standard form for the line whose slope is undefined that passes through (5,-3) Please help me solve, my answer is 5x-3y=0... It was marked wrong and i can not seem to figure it out.

    asked by Gaby
  63. physics

    An ideal gas in a container is at a temperature of 76.3°C. What is the average translational kinetic energy of a gas molecule in the container? _________J

    asked by Kim
  64. us history

    the president can check congress through?? a lobbying b overriding c vetoing

    asked by test tomorrowHELP
  65. to the last one

    how do i figure the equation 1/3 times 9??

    asked by Chris00
  66. 4th grade

    What is the product of the ten one-digit numbers?

    asked by Linda
  67. science

    What is the label reaction of Na2O+H20->2NaOH ?

    asked by jen
  68. 4th grade

    Estimate the answers: a) 3 10/11 + 2 1/101 = Choose 4,5,6,or 7 b) 5 2/47 - 2 1/35 = Choose 2,3,4, or 5 c) 6 17/19 x 7 3/290 = Choose 42,49,63 or 213 I need to choose the best answer to this problems. Please help me with this. Thanks

    asked by Ili
  69. Math

    Write an equation in a standard form of the line that passes through (3,1) and has a y-intercept of-2 . My book does not have problems like this so PLEASE help me!!!!!!!!!

    asked by Lilly
  70. social studies

    what political party did saddam hussein lead in iraq

    asked by nina
  71. 5th grade

    42 students equally divided into "n" teams . write an expression for the number of students on each team.

    asked by Anonymous
  72. Math

    Petra bought gasoline when the odometer read 15,345.4 .After the next filling, the odometer read 15665.6 .It took 13,4 gal to fill the tank. How many miles did she drive. How many miles per gallon did the car get.

    asked by Gail
  73. chemistry

    Calculate deltaG from deltaH and deltaS. Use the table of standard thermodynamic data. calculate deltaG at 0 degrees C for CH3CH2CH3 + 5O2 --> 3CO2 + H2O. CH3CH2CH3 + 5O2 --> 3CO2 + 4H2O I've balanced the equation so far, I know that deltaG = delatH -

    asked by Bob
  74. 4th grade

    The 93 nature camp students ate lunch at the lodge. They sat at an even number of tables. There were 5 students sitting at one table, and an equal number of students sitting at each of the other tables. How many students were sitting at each of the other

    asked by gianina
  75. Physics

    Standing waves are set up on two strings fixed at each end, as shown in the drawing. The two strings have the same tension and mass per unit length, but they differ in length by 0.55 cm. The waves on the shorter string propagate with a speed of 41.8 m/s,

    asked by Daniel
  76. Algebra 2

    I need to know how to solve quadratic equations by factoring. Can you so a step by step explanation to this sample problem? 2 x -12x-28

    asked by Joanna
  77. Economics

    It is assumed that the toothpaste market is perfectly competitive and the current price of a case of toothpaste is $42.00. CPI has estimated its marginal cost function to bas follows: MC=.006Q. The Board would like to know how many cases of toothpaste

    asked by sHARRON
  78. algebra 2

    how do you graph quadratic functions

    asked by converse
  79. History

    Compare the different diplomacy styles of Presidents Roosevelt, Taft, and Wilson.

    asked by Abby
  80. Literature

    I need help writing a free verse poem on a newspaper article I read about a cat being stuck in a vending machine for three days. Can I please get some links that can help me start off? Free verse poems are really easy to write, but I'm not sure how to

    asked by mysterychicken
  81. Elementary Math

    Which of the following sets are functions from the set of first components to the set of second components? (a) {(b, a), (d, c), (a, e), (g, f)} (b) {(a, b), (b, a), (c, c), (a, c)} (c) {(b, a), (c, a), (b, b), (c, b)}

    asked by Shanta
  82. U.S history

    The book of essays explaining and supporting the constitution was called?? a -The federalist Papers b-The Antifederalist c-The Spirit of Laws thank you

    asked by test tomorrowHELP
  83. French

    I have to write sentences in passé composé, using the subject and verb shown below. The first one in each group is done already showing how its supposed to be done. Can you check them to see if there correct. 1.) je/aller/en ville Je suis allée en

    asked by Keyanna
  84. math

    i still don't get it ...Our class planned a holiday party for disadvantaged kids.Some of us baked cookies for the party.On the day of the party,we found we could divide the cookies into packets of two, three, four, five, or six and have just one cookie

    asked by Katherine
  85. math

    there are 12 people at a party. each person shakes hands with each of th other guests. how many hadshakes will there be in all

    asked by anu
  86. Algebra - word problem

    A red ball and a green ball are simultaneously tossed into the air. The red ball is given an initial velocity of 96 feet per second, and its height, t seconds after it is tossed is (-16t^2 + 96t) feet. The green ball is given an initial velocity of 80 feet

    asked by lindy
  87. algebra 2

    how do you solve quadratic equations by finding square roots i have no clue how to do this. I have fallen behind in my math class because my teacher is horrible. I need to learn this to understand everything in the section in the section. I beg someboody

    asked by HELP ME
  88. accounting

    using the equation A=L+OE how would you balance this problem: You buy acompany for $200,000 - Assets are land $50,000, building $130,000, equip $20,000. Took 70,000 from personal bank account to invest in business. Made a down payment of $40,000 and

    asked by sue
  89. chemistry

    Why is a weaker base a better leaving group? Can someone please explain that? I understand that the more stable the leaving group is after it has left, that means the more able it was to accept an electron pair prior to leaving, but I don't understand the

    asked by Kay
  90. Biology

    In poultry, black color is due to a dominant factor (B). The recessive color is red (b). A red male bird is mated to a black female. They produce many offspring, half of which are black and half red. What are the genotypes of the parents?

    asked by Katelynn
  91. computers

    explain how computers are classified

    asked by Anonymous
  92. Socials

    Did the industrial revolution improve conditions for women? No, the industrial revolution did not improve living conditions for women. The women had to work very hard, for long hours to receive payment. They often had to work in dangerous conditions. Even

    asked by Sara
  93. Socials

    This is a table: table 5-1: 1845 Census ______________________________________ Total population 223 054 ______________________________________ People living in cellars 40 000 ______________________________________ People living in crowded apartments 60 000

    asked by Sara
  94. Physics Meteorite

    A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls

    asked by Andy
  95. Physics

    A 46.5-cm diameter disk rotates with a constant angular acceleration of 2.4 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this

    asked by Ed
  96. Statistics (Probability)

    I have a q

    asked by Joe
  97. college

    name one Customer Relationship Management characteristic in share of customer

    asked by lisa
  98. Physics

    A string has a linear density of 6.7 x 10-3 kg/m and is under a tension of 210 N. The string is 1.6 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c)

    asked by Daniel
  99. Advanced Functions

    How bright a star appears can depend on how much light the star actually emits and how far away it is. The stellar magnitude scale can be adjusted to account for distance as follows: M2-M1 = log (b1 / b2) Here, M refers to a star's absolute magnitude, that

    asked by -
  100. Math

    If a shot is fired directly upward at 1200 feet per second from a ground elevation of 8oo feet above sea level, how high would it go above the ground level? Thanks, Gerry

    asked by Gerry
  101. problem solving math

    In the farm pet club pet show, 44 pets are entered. There are 3 times as many dogs as cats and half as many ferrets as dogs. How many of each are there?

    asked by marissa
  102. math

    thank you! this one is hard. four tellers are in a contest to see who can help thepersonal bankers schedule the most meetings with customers. aaron has 52 customer meetings tha clyde and cathy has 25% more than aaron. they want me to list the tellers from

    asked by Chris00
  103. history

    what is the most important contributions of physics to industry

    asked by marcel
  104. Math

    How bright a star appears can depend on how much light the star actually emits and how far away it is. The stellar magnitude scale can be adjusted to account for distance as follows: M2-M1 = log (b1 / b2) Here, M refers to a star's absolute magnitude, that

    asked by Anonymous
  105. math

    draw a picture of a trapezoid. how many degrees in tital, are inside a trapezoid

    asked by anu
  106. Algebra

    A metal stays solid at Fahrenheit temp below 1868.5 Determine (in terms of an inequality) those Celsisu temp, for which the metal stays solid. Use the formula F=9/5c+32

    asked by matt
  107. math

    62.5% in fractin and decimal: ?

    asked by anu
  108. last math ques!

    this is the last one 45 people cashed checks at bank A on Monday. Of these 80% of these already had accounts at bank A. one-third of the people who did not already have an account opened, opened an account Monday. how many people opened an account monday?

    asked by Chris00
  109. Physics

    A transverse wave on a string is described by the following equation. y(x, t) = (0.35 m) sin[(1.25 rad/m)x + (81.2 rad/s)t] Consider the element of the string at x = 0. (a) What is the time interval between the first two instants when this element has a

    asked by Mac
  110. h

    I was also quite taken aback that I was no longer frightened by the story that the book described Is this correct?

    asked by grammar
  111. math

    Write improper fraction as a mixed number or a whole number: 13/12

    asked by Angela
  112. USINGWINDOW XP VISTA

    In window Vista, which process allows you to display two documents side by side

    asked by TINA
  113. math

    i don't know ms. sue i did not get the question

    asked by anu
  114. Socials

    Make an organizer with the headings Clothing, Housing, Transportation, Earning a Living, and Education. List the factors that made a person upper class, middle class, or working class in Britain during the 18th and 19th centuries. Can someone please tell

    asked by Sara
  115. Density

    If the actual density is 1.2686 g/mL and the determined density by experiment was 1.0275 g/mL, is it reasonable to conclude the obtained product was fairly pure. I am writing a lab report and these were my results and interpretation, but I am not sure if

    asked by CMM
  116. microecon

    Our professor gave us a exercise to do for fun where he said to derive profit=PQ(P,A)-C(Q(A))-A (note Q is a function of A both for revenue and cost) the answer I came up with is profit= Pdq/da -Cqfq/da-1 =Pdq/da -(d+c/dq)(dq/da) Im not sure if I am right

    asked by sonia
  117. Social studies

    Which american indians refused to move away from their homeland after the government orderd them to leave.

    asked by Billy
  118. MATH

    ROUND 427,685 TO THE NEAREST THOUSAND

    asked by RHONDA
  119. class rank

    what does the class rank 1 out of 120 mean?

    asked by james
  120. adult education

    the following in your paper: o Include how you applied concepts to formulate your decision o Include appropriate quantitative concepts and your application to find resulting data to reduce uncertainty in this decision. o Identify each outcome from your

    asked by Bernice
  121. English

    Hamlet: I need to look at the passages from Acts IV and V and assess their impact within the context of the whole play. I have already done so and it's giving me these questions using a passage. I need some help, please. :) Passage 1: " Now, whether it be

    asked by Greg
  122. math

    Find decimal and fractional notation for the percent notation in each sentence. Be sure to simplify fractions. They are based on a 2,000 calorie day. 1 ounce provides 9% of the mdv of fat

    asked by gina
  123. grammar

    The field school was an amazing and eye-opening experience in which I was able to travel to an area I had never visited before and learned about a culture I hadn’t known about.

    asked by Helen
  124. chemistry

    aluminum reacts with sulfric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be form if 250 g H2SO4 completely reacted with aluminum?

    asked by S
  125. math

    Consider the set of northwestern states or provinces {Montana, Washington, Idaho, Oregon, Alaska, British Columbia, Alberta}. If a person chooses one element, show that in three yes or no questions, we can determine the element.

    asked by jamecia
  126. Social Studies

    What is yam? Is it sweet potato or potato? What is the difference between yam and sweet potato?

    asked by rfvv
  127. French

    Could you check these also thanks: Directions: Donnez des réponses personnelles. 1. Tu vas souvent au cinéma? Answer: Oui, je vais souvent au cinéma. 2. Qu'est-ce que tu aimes comme films? Answer: J'aime un film d'horreur. 3. Quel est ton acteur

    asked by Maria
  128. Physics

    i spent so much time putting this equation together, but now I'm so confused solving for T 110 g x 4.816 J/g/C x (T-17)+31g x 0.385J/g/C x (T-300)=0 Can you help me

    asked by Ana
  129. algebra 2

    how do you solve quadratic equations by factoring?

    asked by converse
  130. physics

    how do you calculate the frequency of a 2.500 m long pendulum in Quito, Ecuador, where g= 9.780 m/s^2

    asked by abbigail
  131. English (quotes)

    hi! uhmm i am working on quotes right now. i have to identify who the speaker is and then state the significance of the quote to the play (shakespeare) i was just wondering if somebody could give me some points on how to write significance? thanks!

    asked by Dawn
  132. us history

    what was america's first constitution called? a american constitution b articles of coonfederation c republic plan

    asked by test tomorrowHELP
  133. Math

    How do you estimate the quotient of 193 divided by 6

    asked by Chris
  134. math

    m/7 = 8/5

    asked by anu
  135. math

    ok sam has a savings account that increased in value over a twelve month period from 8765.00 to 9006.04. he made no deposits or withdreals in that time. what percent intrest did he receive for the 12 month period? HOw to i figure that out??

    asked by Chris00
  136. h

    The discoveries of the tombs and mummies must have been breathtaking for those lucky few that found them. "that" or "who"?

    asked by grammar
  137. Algebra

    I don't know how to solve 12x(2)-15x=0 using the quadratic equation ax+bx+c=0 with this question I am unsure of what a, b and c are supposed to be, therefore I do not know how to solve this! Please help!

    asked by Liz
  138. Science

    A student heats 4.00 g of a blue compound, which reacts completely to produce 2.56 g of a white compound and an unknown amount of colorless gas. What is the mass of the gas? Answer?_________ Work area: Reactant (s) = Product (s)

    asked by Tanner
  139. science

    A component synthesized by photosynthetic producerrs on which all aerobic consumers depend is what

    asked by hope
  140. Algebra

    Could you please check my work? 3/(x-7)=2/(2x+1) 3(2x+1)=2(x-7) 6x+3=2x+-14 x=-4.25 I appreciate it.

    asked by Nathan
  141. Math

    One card is selected at random from an ordinary set of 52 cards. Find the probability of each of the following events: b. A spade and a 5 are drawn. d. A jack is not drawn.


    asked by connie
  142. algebra

    Why does the inequality sign change when both sides are multiplied or divided by a negative number? Does this happen with equations? Why or why not? Write an inequality for your classmates to solve. In your inequality, use both the multiplication and

    asked by Anonymous
  143. algebra

    Pick a country of your choice that is experiencing population growth. Using the Library, web resources, and/or other materials to find the most recent population count of the country you have chosen and the population growth rate of that country. Use that

    asked by stephanie
  144. 12th grade AP Politics

    What are some of the illegal ways to add amendments to the Constitution? Why are these ways prefered rather than the legal methods? Please help...I found the legal ways but don't know the illegal one. I have searched google but they don't have any answer.

    asked by Anonymous
  145. AP Chemistry

    okay, so i'm working on a specific heat lab right now. I have one question that I am really stuck on... Here it is: Why should the metal be dry before dropping it into the calorimeter? ... is it because it affects the heat of the cube or it affects the

    asked by Jane
  146. Ex English

    Hello, I've been given a project in School, and I'm wondering if you guys could help me pick a topic, here is the prompt. On a separate page for each letter, you will need a topic for each letter to fall under I must have atleast 2 other topic too fall

    asked by Marry
  147. Chem. To Dr. Bob from Earlier Question or anyone

    Dr. Bob, earlier you gave me the equation H2SO4 + NaHCO3 -> H2O + CO2 + Na2CO3 to balance. However, the S is not in the products, so it can't be balanced.

    asked by CMM
  148. english

    which sources are reliable and which are not?

    asked by mary
  149. AP Chemistry

    okay, so i'm working on a specific heat lab right now. I have one question that I am really stuck on... Here it is: Why should the metal be dry before dropping it into the calorimeter? ... is it because it affects the heat of the cube or it affects the

    asked by Jane
  150. physics

    using the work-kinetic energy theorem: .5mvo^2 + Fo/c = .5 mv1^2 where v1 is the velocity at x max I got the following but it is not formatted proprerly. Where am I wrong? .5vo^2 +Fo/c*m = .5v1^2 vo^2 + 2Fo/c*m = v1^2 sqrt (vo^2 + 2Fo/c*m) = v1

    asked by Julia
  151. 4th grade

    There were 93 students going to a nature camp. After equal groups of fewer than 10 students were formed for hiking, 2 students were left over. How many equal groups were formed?

    asked by Ili
  152. 4 grade

    During a hike, Sally and Dave collected 160 acorns. Sally collected 3 times as many acorns as Dave. How many acorns did Dave collect?

    asked by linda
  153. grammar

    Sometimes it took days until I could pull out the artifact that had staring me in the face, and not doing so beforehand had taken much patience and self control. Is the grammar correct?

    asked by Helen
  154. English

    can u help me unscramble this word Dolurf

    asked by mike
  155. Physics

    A race car starts from rest on a circular track of radius 507 m. The car's speed increases at the constant rate of 0.790 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, find the following. (a) the speed of

    asked by Ed
  156. help quick!!!

    a ladder leans against a awall.The top of the ladder is 8 feet above the ground. If the botttom of the ladder is then moved 2 feet farther from the wall, the ladder will lie on the ground with its toptouching the wall. How long is the ladder?

    asked by Ryan
  157. 7th grade science

    How are biotic factors changed in an ecosystem that has flooded ?

    asked by Carmel
  158. social studies

    why can't i find these mutiple meaning words

    asked by taylor smith
  159. social studies

    why can't i find these mutiple meaning words

    asked by taylor smith
  160. Health

    Can getting wisdom teeth removed increase your susceptibility to the flu?

    asked by Nathan
  161. Science

    What are the challenges of managing your chosen terrestrial resource issue? What human activities contribute to the problem?

    asked by Sonja
  162. Creative Writing

    So, for my assignment on extending the definition of family, I will develop the definition by telling what family means to me. I am starting this essay right now, if there's any suggestions or commments that will help me please let me know. I want to take

    asked by y912f
  163. Environmental Science

    identify a viewpoint given in the video that highlights the importance of biodiversity. Do you believe that every species is connected to one another as expressed in the video? Why or why not?

    asked by Anonymous
  164. Math

    Please help me find the pattern 212 , 106 , 135 , 67 , ___ , 47

    asked by Carmel
  165. Statistics

    How can predictions be made from correlations?

    asked by Linda
  166. physics 11

    for a project we're required to create a thermose from household products. What ideas can we use to create an insulator. Any other ideas to keep the heat inside the thermos. Thank-you

    asked by need help
  167. algebra 2

    how do you simplify (3x+5i)/(2i)

    asked by bryce
  168. To Ms. Sue

    Ms. Sue can you please have a moment to look at my previous post, thanks

    asked by Sara
  169. Hamlet

    Something is rotten in the state of Denmark. (I.iv.90) Using two different literary devices, prove or refute the quotation above.

    asked by -
  170. French

    Could you check these thanks: Directions: Vrai ou Faux? 1. Un film doublé a des sous-titres. Answer: vrai 2. Un film en version originale est toujours en français. Answer: faux 3. Au cinéma, il y plusieures séances le week-end. Answer: Faux 4. On peut

    asked by Maria
  171. art

    what is a music self portrait

    asked by christian
  172. math

    1000 divided by 75

    asked by amber
  173. physics

    A transverse wave on a string is described by the following equation. y(x, t) = (0.35 m) sin[(1.25 rad/m)x + (92.8 rad/s)t] Consider the element of the string at x = 0. (a) What is the time interval between the first two instants when this element has a

    asked by Jake
  174. 5th grade

    what is 2cm 72mm plus 69mm

    asked by melissa
  175. french

    what is french polynesia ??????

    asked by Anonymous
  176. Economics

    While sitting in your office one evening, you begin to think about some of the key microeconomic messages you want to communicate to the Board. (Key concepts include, but are not limited to, supply and demand, pricing, competition, costs & production, and

    asked by sHARRON
  177. algebra

    this is not algebra. I just need to know how to find a percentage of something.

    asked by Chris00
  178. math

    the price for a stock has decreased from $24.50 per share to 18.60 per share. what percentage is the decrease? how do i figure this question out please?

    asked by Chris00
  179. gr.12 bio

    how did natural selection influence the degree and rate of evolutionary change?

    asked by kat
  180. language

    Ronald has a goldfish. His goldfish weights 12 lbs. If Ronald feeds the gold fish 2 ounces of food every hour and the fish gains 2 ounces each hour,how many pounds would ronalds goldfish weight in 5 days?How many lbs of food does the goldfish eat in a

    asked by Emily
  181. Social Studies

    Compared with college students in the 1960s, college students today are a. more liberal on some issues, more conservative on others. b. more conservative on most issues. c. more liberal on most issues. d. about as liberal on more issues. e. much more

    asked by Cb
  182. 4th grade

    Explain how you could show five less than a number using an expression

    asked by Anonymous
  183. Marketing

    Name one CRM characteristic found in share of customer

    asked by lisa
  184. math

    but mrs sue can do the first 2 numbers so that i can finish cause i don't get it

    asked by Katherine
  185. spanish

    correct verb form of leer when used as que __ ana?

    asked by Anonymous
  186. research

    The research process has a number of components and each is a separate, independent activity?

    asked by Anonymous
  187. Science

    What are some of the problems when designing a new single cell

    asked by Tia
  188. Literature

    Is my prose poem alright? Every morning, my father goes to work and us to school because we have the liberty to do that. Everywhere, all types of people are working as one and having a fine time. Back in the day, some people weren't allowed to work and the

    asked by mysterychicken
  189. physics Bob Pursley plz help

    A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls

    asked by Andy
  190. MTH 213-Elementary Math

    (a) Illustrate a one-to-one correspondence between the following sets: N = {1, 2, 3, 4,. . . , n,. . .} F = {4, 9, 14, 19, 24,. . .} (b) In your correspondence, what element of F corresponds to 57? Explain why. (c) In your correspondence, what element of F

    asked by Ta
  191. gr.12 bio

    how did natural selection influence the degree and rate of evolutionary change?

    asked by kat
  192. math

    16. Which of the following sets are functions from the set of first components to the set of second components? (a) {(b, a), (d, c), (a, e), (g, f)} (b) {(a, b), (b, a), (c, c), (a, c)} (c) {(b, a), (c, a), (b, b), (c, b)}

    asked by jamecia
  193. social studies

    what word means to occupy the mind excessively

    asked by john
  194. Algebra

    Please help me find the AOS for this... y= -5xsquared - 10x

    asked by Austin
  195. English

    Can you please just check the grammar in this for me. Thank you Nella Larsen theme is to teach the readers that sometimes it is best to deny ones racial heritage rather than to accept it or identify with it. When it comes to certain situations when race is

    asked by Madison
  196. math

    two canadians board a bus. one canadian is the farther of the other canadian's son. how is this possible

    asked by anu
  197. algebra 2

    how do you solve quadratic equations by finding square roots

    asked by converse
  198. math

    7. Classify each of the following as true or false. If false, tell why or give an example showing that it is not true. (a) For all sets A and B, A – B = B – A (b) For all sets A,   A (c) For all sets A, A  A   (d) The set {r, s, t,. . .,

    asked by poo
  199. social syudies

    Why can't the united states make as much money as they want?

    asked by kenny
  200. Algebra

    Any and all help would be greatly appreciated. I'm trying to help my niece and I'm afraid that it is not possible. The volume of a cubic container is x^3 cubic inches. The height of the container was decreased and the length was increased so that the

    asked by Ronald
  201. MTH 213-Elementary Math

    Let U = {u, n, i, t, e} A = {n, i, t} B = {n, e} C = {u, n, i, t, e} D = {u, e} Find each of the following:

    asked by Ta
  202. Imaginary Number i

    I'm have a few questions about i: -How come sometimes you solve to get rid of it, other times you leave the it? For example, 4(-2+3i) becomes -8+12i, while other times (3+2i)(3-2i) yields 13 (the i is turned into negative one). How do you know when to keep

    asked by Rosalie
  203. Algebra

    Please help me find the AXIS OF SYMMETRY for this... y= -5xsquared-10x

    asked by Austin
  204. government

    Whatis the historical explanation of the 7th amendment?

    asked by kelly
  205. spanish

    correct for of ser or estar for... mi papa __________ maestro.

    asked by courtney
  206. math

    how can you get a ping pong ball out of a hole that is 2metres deep? the diameter of the hole is 10 mm greater than the diameter of the ball.

    asked by anu
  207. math

    following sequence: 1,4,9,16,......

    asked by anu
  208. physics!!!!

    A spaceship passes Earth at a speed such that γ = 112. A creature aboard the vessel does the Mongoian greeting dance that takes it 21 s (on its clock -- bought on a previous visit -- which is why it reads in seconds) to perform. How long will the

    asked by Jordan
  209. Chemistry

    The titration of a sample of a weak acid with an equivalent weight of 108 grams requires 38.2 mL of 0.100 M NaOH. What is the sample mass in mg?

    asked by Telly
  210. math

    Explain how you can show five less than a number using an expression

    asked by Kim
  211. AP Chemistry

    One last question.... Which of these two metals (Aluminum or Copper) would be a better choice to make silverware out of? Specific heat of: Al = .901 Cu = .39 my guess was the aluminum, because it would take longer for it to get hot, since it requires more

    asked by Jane
  212. Chemistry

    What volume in mL of .100 M NaOH would be required to titrate a 297 mg sample of a weak acid with an equivalent weight of 126 grams?

    asked by Telly
  213. financial literacy

    what are the 5 most important parts of a school budget?

    asked by annia
  214. math

    why is this man a fraud? ihold it before your eyes! said the man exactly. this stuff right here in this test tube! you can see it! in seconds. mere seconds, it will dissolve any matter that touches it!

    asked by anu
  215. h

    The destruction of the great city, then its clumsy discovery of the ruins in the 19th century, enthralled me. Is the grammar correct? anyway I could change the wording to make it flow better?

    asked by grammar
  216. Algebra

    Do I have this right? A first degree polynomial crosses the x axis A second degree polynomial touches the y axis without crosisng A third degree polynomial flattens against the y axis.

    asked by Nicki
  217. Thanks everyone!

    oh durr thanks!! hehe

    asked by Chris00
  218. math

    i don't know ms sue

    asked by anu
  219. science

    Explain why water is an important solvent in the environment.

    asked by Maggie
  220. Math

    If you have 200 blocks and want to stack them in a solid shape, how many shapes can you stack them?

    asked by Lauren
  221. science

    where does the energy source come from, is it easy to obtain, etc?

    asked by susan
  222. algebra 2

    how do you solve quadratic equations by finding square roots i have no clue how to do this. I have fallen behind in my math class because my teacher is horrible. I need to learn this to understand everything in the section in the section. I beg someboody

    asked by HELP ME
  223. hca/240

    provide an overview of obesity in 2000 words

    asked by tamara
  224. math

    what phony means

    asked by anu
  225. economics

    can one determine that a project was successful by the customers reaction?

    asked by lisa
  226. Chemistry

    One last question.... Which of these two metals (Aluminum or Copper) would be a better choice to make silverware out of? Specific heat of: Al = .901 Cu = .39 my guess was the aluminum, because it would take longer for it to get hot, since it requires more

    asked by Jane
  227. math

    nooooooooo

    asked by anu
  228. Statistics

    A researcher is trying to find out which cereal is the favorite among five year old children in a certain community. A few cereals are mentioned over and over again and some cereals are barely mentioned. In reporting which cereal was the favorite, would

    asked by Linda
  229. English

    1. Which genre Shrek is? 2. Which genre is Shrek? (Which one is correct?) 3. That is a girls' middle school. 4. That is girls' middle school. (Which one is correct?) 5. Introduce your favorite book, and write what's the story about. 6. Introduce your

    asked by rfvv
  230. Statistics

    What are some examples of how data can be misconstrued if we are not careful to report it in the same way that we collect it?

    asked by Linda
  231. math

    write the quotient 3 to the tenth power divided by 3 to the third power

    asked by jessic
  232. English

    1. It's about father's love to children. 2. It's about Father's love to children. 3. It's about Fathers' love to children. 4. It's about a father's love to children. 5. It's about the father's love to children. (Which ones are grammatical?)

    asked by rfvv
  233. Math

    In 2001, credit card companies mailed 5 billion credit card applications to 262 million people. On average, how many applications were mailed to each person? Express your answer to the nearest whole application.

    asked by Noah
  234. Science

    What chemicals are in curds? thanks

    asked by Rebekah
  235. Social Studies quick question

    James Watt invented the steam engine in what year, and where? Are these right In the 1760s he invented the steam engine in Britain

    asked by Maria
  236. English CRT 250

    your child is trying to prove that she did not steal chocolate chip cookies from the cookie jar, so she makes this argument: “There are no chocolate stains on my hands, so I couldn’t have stolen the cookies.”

    asked by diane
  237. math

    may be i get the answer the glass is transparent

    asked by anu
  238. history

    was General Douglas Haig a good or bad general? i think he was a bad general because he was only interested in winning the battle of the somme and not the lives of the soldiers.

    asked by freddie
  239. english

    How to get started writing a thesis paragraphs with these 3 reasons: 1.you are old enough and can take care of yourself. 2.with mobile phones,it's possible to keep in touch with them on a regular basis,which would not be too stressful and worrisome. 3.if

    asked by tiffany
  240. Algebra

    Can you explain how to find the solution of 3x^2-2x+5, using the quadratic formula? I got it down to (2 +/- sq. root of -56)/6. But my book then reduces that to (2 +/- 2 times the sq. root of 14i)/6. But I think in place of the 2 and the sq. root of 14 it

    asked by Leyla
  241. Math

    the sum of 2 whole number is 72 and the difference is 48

    asked by M.J Montgomery
  242. biology

    4. Which of the following species is extinct? 1 American bald eagle 2 bison (buffalo) 3 passenger pigeon 4 giant panda

    asked by ana
  243. Careers

    Are there any careers where business and social sciences overlap? I can't decide between what I wanna do. I enjoy both.

    asked by Lena
  244. french

    how do you change a normal sentence in french to an inverted sentence? Example: change "Est-ce que nous parlons anglais?" to an inverted sentence

    asked by robert
  245. macro economics

    How do i construct an income effect graph and a substitute graph

    asked by joy
  246. organic chemistry

    Two students are running C-13 nmr, one student has pare-xylene and the other has meta-xylene. Explain how they will be able to distinguish the two spectra.

    asked by brooke
  247. Helen

    But it is your highly regarded Anthropology program that caught my attention. It is with the help of that department that my passion for history and Archeology will flourish, and my dream of becoming an archeologist will be made real. Is the grammar okay?

    asked by grammar
  248. calc

    a) Suppose f(x) is defined on 0 ≤x≤1 by the following rule: f(x) is the first digit in the decimal expansion for x. For example, f(1/2) = 5 and f(0.719) = 7. Sketch the graph of y = f(x) on the unit interval with appropriate scales for x and for y. Use

    asked by Mark
  249. math

    csc(6a+ð/8)=sec(2a-ð/8) Find values of A.

    asked by Tiger
  250. Pre-Algebra B

    Find the area of a circle whose radius is 12.7 cm

    asked by Elizabeth
  251. Math

    Please help me find the pattern 212 , 106 , 135 , 67 , ___ , 47.5

    asked by Casee
  252. 4th grade

    what year was the world created?

    asked by jasmine
  253. math

    write 2 different improper fractions that equal to 4 2/3.

    asked by carla
  254. MATH

    rewrite in distributive property 2(a+4)

    asked by KARINA
  255. history

    Please verify: the workers that were generally better off in America than Europe before 1860 would have been the skilled workers? The most important iron manufacturing center in the South was the Atlanta Iron Foundry? Utopian societies emerged in the

    asked by lm