Calculus (Answer Check)

88,703 results, page 71

  1. AP Calculus AB

    lim |x-3|/x-3 x-->3^- A) 0 B) -1 C) 1
  2. calculus

    d/dx (16-3x- 1/2x^2)= ? I got dy/dx= -3 - x
  3. math,correction

    Multiply. (x+2)(x-2) my answer is: x^2-4 Factor completely. 3(x-2)^2-3(x-2)-6 MY answer: 3(x-4)(x-1) Factor 9x(x-7y)-6(x-7y) My answer is: (9x-6)(x-7y) Divide: (x^3+2x^2+x+12)/(x+3) My anwer is: x^2-x+4 Looks OK!
  4. statistics

    Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...
  5. Statistics

    Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...
  6. physics

    A mover pushes a couch a distance of 4 m to the top of a ramp into the back of a truck using 500 N of force. A) What is the work input of the mover? B) What is the mover’s power if the task takes 10s? C) If the mass of the couch is 100 kg and the back of the truck is 1.5 m ...
  7. Chem Check Please!!!

    1) Calculate the cell potential, at 25 C, based upon the overall reaction Zn2+(aq) + 2 Fe2+(aq) -> Zn(s) + 2 Fe3+(aq) if [Zn2+] = 1.50 x 10^-4 M, [Fe3+] = 0.0200 M, and [Fe2+] = 0.0100 M. The standard reduction potentials are as follows: Zn2+(aq) + 2 e– -> Zn(s...
  8. Child Care

    Which of the following statements about children and computers is incorrect? A. To be effective, a child's computer learning experiences must be planned and supervised. B. At a day care center, computer time should be scheduled like any other activity. C. During children's ...
  9. English

    Let's review the previous lesson. What did we learn last time? There is fast food on almost every street corner in New York City. Can you answer my question? What do carts in New York City sell? They sell drinks, hotdogs, and pretzels. Good job. OK, open your books to page 66...
  10. History Plz help i changed the answers

    Ms. Sue, Reniy , Writeteacher . I changed my answers now can you check if they are correct? Please guys i really need a good grade 2. What role did nativism play in federal policy? A. Concern for immigrants' children led to increased public education funding. *** My Answer B. ...
  11. Chemistry - Periodic Table+IE(check+help)

    The following data lists the ionization energies for a given atom: IE1 = 738Kj/mol; IE2 = 1451Kj/mol; IE3 = 7733Kj/mol. Predict the valence electron configuration for this atom, and explain your reasoning. i do not understand this question but i will give it a try, please ...
  12. Chemistry - Periodic Table+IE(check+help)

    The following data lists the ionization energies for a given atom: IE1 = 738Kj/mol; IE2 = 1451Kj/mol; IE3 = 7733Kj/mol. Predict the valence electron configuration for this atom, and explain your reasoning. i do not understand this question but i will give it a try, please ...
  13. Math

    Please help me with this ASAP! I need help with this just checking my answers thanks 1. There are 14 blue marbles, 8red marbles, and 12 green marbles in a jar. What is the ratio of the total number of marbles to the number of red marbles? A. 24:8 B. 34:8 (my answer) C. 8:34 D...
  14. Physics

    A flat thin non-conducting ring has an inner radius R1 and an outer radius R2 . The disk is uniformly charged with charge per unit area σ(>0) . (a) What is the electric field at the center, P , of the ring? Express your answer in terms of the following variables, if ...
  15. Science 8th grade please check (revised answer

    Mr. Jones went to his doctor because for the past few days he has been having frequent burning uriation. The doctor preformed a urialysis. This was done by have the patient void into a collection container. The urine was cloudy and yellow in color. There was an unusual ammonia...
  16. bio (CHECK ANSWERS)

    Modern fishing practices threaten biodiversity primarily through the? A)accidental capture of unwanted species B)physical destruction of marine habitats. C)removal of community food supplies D)chemical poisoning of the water I think the answer is c but not sure 2. Which of the...
  17. Grammar Answer Check

    Follow the directions in parentheses to write four sentences with gerunds. 1. (Use the gerund singing as a predicate nominative.) A: My favorite activity is singing. 2. (Use the gerund dancing as a subject.) A: The girl's dancing forced us to our feet. 3. (Use the gerund ...
  18. Calculus

    Hi! My question is: Given that f is a function defined by f(x) = (2x - 2) / (x^2 +x - 2) a) For what values of x is f(x) discontinuous? b) At each point of discontinuity found in part a, determine whether f(x) has a limit and, if so give the value of the limit. c) write the ...
  19. Calculus 1A

    I am trying to find: dy/dx for y = sec(tan x) I have the answer, but I have no idea how to get there. I know that the derivative of sec x = sec x tan x and that the derivative of tan x is sec^2 x. But sec doesn't have an x, so ...?
  20. college pre-calculus

    simplify: square root (4/3)-square root (3/4) A. 2-sqaure root(3)/2 square root (3) B. square root (7/12) C. square root (3)/6 D. 2/square root (3) which answer? this is what i got square root (16/12)- square root (9/12)= square root (7/12)
  21. calculus

    Evaluate these limits. (Enter answer as a decimal. Enter INF if the limit is +∞; -INF if the limit is −∞; and DNE if the limit is neither ±∞ and does not exist.) (a) limx→04+x−−−−−√−2x= - sin responder (b...
  22. algebra...urgent help

    A bag soccer balls contains 8 balls with black design and 7 balls with red design with no other types of soccer balls. Coach graves reaches into the bag and randomly pulls out two soccer balls. please check my answer a) explain these events are either dependent or independent...
  23. English

    Writeacher, I need your help to check a few things. Thank you. 1) At the first time Clare didn't say if she was free, but the next day she confirmed she was able to go to the cinema. (Can you check this sentence for me?) 2) I would like to enrol at the faculty of Engineering. ...
  24. US history

    Indicate below the type of government each colony had in the year 1750. 1 NEW HAMPSHIRE; ROYAL 2 MASSACHUSETTS; ROYAL 3 CONNECTICUT; SELF-GOVERNING 4 RHODE ISLAND;SELF-GOVERNING 5 NEW YORK; SELF-GOVERNING 6 NEW JERSEY;ROYAL 7 PENNSYLVANIA;PROPRIETARY 8 DELAWARE; PROPRIETARY 9 ...
  25. Math

    Use absolute value to determine the distance between the two numbers. -3.5 and 4 1/4 |-3.5- 1 1/4| |-3.5- 9/4| |-3.5/1 - 9/4| |-14/4 - 9/4| |-23/4| 23/4 5.75 I got 5.75 as my answer. But why does my answer key show 7.75 units? I'm not sure what I did wrong. I've double checked...
  26. math

    logan isn't 2 years older than Lindsey. Five years ago the sum of their ages was 30. Find Lindsey current age. X-5+2x-5=30. -1 + 0= 30. I don't think this right I tried I can't get the right answer. According to the common core the answer is supposed to be 19. Please help I ...
  27. project

    my is elderly people things to start a presentation goes like this ............. 'cities needs to provide services to all residents but espially to eldery people' because there population increases in future! city need 55 plus buildings to live and pavllion. they should make ...
  28. s.s project

    my is elderly people things to start a presentation goes like this ............. 'cities needs to provide services to all residents but espially to eldery people' because there population increases in future! city need 55 plus buildings to live and pavllion. they should make ...
  29. math

    Resource allocation podunk institute of technology’s math deaprtment offers two cources: finite math and applied calculus.each section of finite math has 60 studnets, and each section of applied calculus has 50. The department is allowed to offer a total of up to 110 ...
  30. English

    This is a thank you letter to a company. Please check it and let me know what you think. If I need to change something or its just fine. Check for any errors. Thank you very much for taking the time to meet with me on April 14 regarding the position of Administrative Assistant...
  31. chemistry

    A 0.4671g sample containing sodium bicarbonate was titirated with hcl requiring 40.72ml. The acid was standardized by titrating 0.1876g of sodium carbonate FW 106mg/mmol requiring 37.86ml of the acid. Find the percentage of nahc03 fw 84mg/mmol in the sample. My own calculation...
  32. AP Chemistry

    Could you please check my work and let me know if my answer is correct? I don't have a solutions guide and I want to make sure I'm really comprehending the material. Calculate the # of grams of barium flouride that will dissolve in 2.50 L of pure water at 25 degrees C. Assume ...
  33. Calculus the derivative

    The height in feet of a free falling object t seconds after release is s(t)=-16t^2+ v_0t+s_0, where s_0 is the height(in feet) at which the object is realsed, and v_0 is the initial velocity (in feet per second). Suppose the coin is dropped from a height of 1454 feet. D. At ...
  34. Algebra

    Why is first equation is x negative and in equations 2,3 & 4 answers are not negative and also sign changes? 1)Equation: x+y>1 Answer: y=-x+1 2)Equation: x-y>5 Answer: y<x-5 3)Equation: 3x-y<2 Answer: y>3x-2 Sign is greater than or equal to in the following ...
  35. English

    Hi! All Watched Over By Machines Of Loving Grace I like to think (and the sooner the better!) of a cybernetic meadow where mammals and computers live together in mutually programming harmony like pure water touching clear sky. I like to think (right now, please!) of a ...
  36. Please check my answers English

    Read the following sentences from "When Greek Meets Greek." Fraser scratch his head. "I know of a landlord up the road who vow that ain't ever taking anybody who come from the West Indies. But he don't mind taking Indians. He wouldn't know the difference when he see you is a ...
  37. BIology

    Reptiles have some specific adaptations that make them well suited to their environment. In your own words, discuss some of these adaptations by answering the following questions. Each answer should be constructed in one or two well-developed paragraphs. a. What is the ...
  38. Science AZ

    Define what is meant by the terms initiative and referendum as they are used in the Arizona Constitution. Please check the Government definition of "initiative" in this online dictionary. http://dictionary.reference.com/browse/initiative Then click the "referendum" link in the...
  39. chemistry

    Suppose you are asked to find the area of a rectangle that is 2.1-cm \rm cm wide by 5.6-cm \rm cm long. Your calculator answer would be 11.76 cm 2 \rm cm^2 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not round your answer to...
  40. chemistry - hess's law (check + help)

    31. Carbon monoxide reacts with hydrogen gas to produce a mixture of methane, carbon dioxide, and water. (This mixture is known as substitute natural gas.) 4CO(g) + 8H2(g) → 3CH4(g) + CO2(g) + 2H2O(_) Use the following thermochemical equations to determine the enthalpy ...
  41. Physics please check

    Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final -T initial) (2531J - 1101J) = 3/2(3.0mol)(8.31)(T final - 345K) ...
  42. Reading

    Cellular Plan 1 550 minutes for $89/month Includes unlimited long distance, nights & weekends, & 500 text messages. Cellular Plan 2 600 minutes for $90/month Includes unlimited nights & weekends, & unlimited text messaging. Cellular Plan 3 900 minutes for $90/month Includes ...
  43. English

    Check my answers please?? Match the litter of the author with his or her description. Not all letters will be used. A. William Bradford B. Captain John Smith C. Anne Bradstreet D. Okaudah Equiano E. Thomas Paine F. Thomas Jeffereson 1. I wrote an account of my voyage across ...
  44. Probability (Please check revised answer)

    X, is assumed to be a random variable by placing letters of the word “YACHT” in a hat. If these letters are withdrawn then it gets replaced. A value of 1 is given when a vowel is retrieved, and a value of 2 is given when a consonant is retrieved while a value of 3 is given...
  45. Calculus (Momentum and Force)

    The change in the momentum of an object (Ä p) is given by the force, F, acting on the object multiplied by the time interval that the force was acting: Ä p = F Ät . If the force (in newtons) acting on a particular object is given by F(t)=cost , what’s the total change in ...
  46. vocab

    continue vocab 2- bound A tied B released C confirmed D restrained answer B 3- loathed A detested B loved C hated D despised answer B 4 strive A attempt B try C give up D fight for answer C
  47. Dimensional Analysis

    eLydi wrote 4 1/2 pages of her science report in one hour. What was her writing rate in pages per minute? My answer: ( ihavetwo, tell me which is right, if any are?) answer 1: 0.075 answer 2: 13.33
  48. math

    Can someone help me answer this question? It's combining like terms, my teacher said that the first term is right but the rest is wrong. Question~~ 2x^2y–5xy–7xy–8x^2y+9xy^2 –xy^2 My answer ~~ 2x^2+-8x^2 (2-8)x^2 -6x^2 y+y+y+y (1+1+1+1)y 4y -5x+-7x+9x+-x (-5-7+9-1)x -...
  49. English

    Look at the things in the picture. What can you see there? Answer the questions looking at the picture. What are you going to do? I'm going to go for a hike. I am going to write three postcards and send them to my friends. I am going to listen to music with the MP3 player. ...
  50. Spanish

    Can you double check if I followed the directions correctly this time too and the answers were correct. Give the correct form of the appropriate verb, saber or conocer, which would be used in writing the following sentences in Spanish.Be sure the verb is written in the correct...
  51. math(check answers please)

    hi please check my math answers i only have 2 for now i just wanted to make sure i had the right idea. sarah is making her own halloween costume.The costume requires 2 5/8 yards of materials.Write the number of yards needed for sarahs halloween costume as an improper fraction...
  52. Algebra-help

    Jordan decides to start a garden care service. He plans to charge $20 for the first hour and $10 for each additional hour that he spends working on a garden. He works 5 days a week and takes care of one different garden each day. How many hours will he need to work if he wants...
  53. Calculus

    Posted by hey on Monday, August 10, 2015 at 11:28pm. A man 5.5 ft tall walks away from a lamp post 10 ft high at the rate of 8 ft/s. (a.) How fast does his shadow lengthen? (b.) how fast does the tip of the shadow move? Calculus - Reiny, Monday, August 10, 2015 at 11:43pm make...
  54. calculus

    Suppose R is the rectangle 1<=x<=4, |y|<=2 and evaluate the double integral ∫R∫f(x,y)dA, where f(x,y)= y/(1+3x^4)^(1/2). I first decided to integrate with respect to y first (which I think I can choose to do) I am a little confused at this part though ...
  55. SCIENCE(CHECK ANSWER)

    how does the use of a golf club make it easier to move a golf ball from its starting position to a hole 250 yards away? A.the golf club reduces the distance over which the input force is applied B.the golf club reduces the input force needed.(I PICKED THIS) C.the golf club ...
  56. poetry question

    Hello for this poem for this question which one is correct: "The child is father of the man." What does this mean? The best fathers are immature. If one can't be a father he can never have a child. Our attitudes and beliefs as children stay with us throughout life. Fathers ...
  57. 8th History DBQ - Pls check my answer, thx!!!

    Document 7: W. E. B. Du Bois publicly embraced the cause of woman suffrage after he moved north in 1907. The signs of awakening womanhood in the world to-day are legion. The best novelists are women. Some of the keenest essayists and graceful writers of verse are women. Women ...
  58. Calculus

    True or false: a) if f(x) is continuous at a, then the limit of f(x) as x approaches a exists b) if the limit of f(x) as x approaches a exists, then f(x) is continuous at a My answer: a) false b) true
  59. Calculus

    I did an experiment where I had to measure how fast water flowed out of a container at different times and with different volumes (from 0mL-1000mL in increments of 50). I also had to record the values into a table and graph them. (I got an exponential function). I got a slope ...
  60. Chemistry

    The overall cell reaction occurring in an alkaline battery is: Zn(s) + MnO2(s) + H2O(l) ---> ZnO(s) + Mn(OH)2(s) a) How many moles of electrons flow per mole of reaction?...answer: 2. Mol e-Note: b) If 6.09g of zinc is oxidized, how many grams of manganese dioxide and of ...
  61. Physics

    I'm comparing the "g-force" of a rocket and a race car. My answer for the race car corresponds to the answer in the book but my answer for the rocket is off by 1. The book says I need to add 1 G because the rocket is going upward. So, instead of my answer of .87 G, the correct...
  62. Math

    Sanjay takes a pre-ap multiple choice test of 25 questions in which he earns 10 points for every correct answer, but loses 2 points for every incorrect answer. Sanjay answered all 25 questions and scored 202 points. How many did he answer correctly? how many did he answer ...
  63. American Government

    Check my answers please 1. Which of the following describe the role of an entrepreneur in a capitalist economic system? (I need to select 2) A. Someone who combines the factors of production into a business B. Someone who decides how much regulation the economy needs C. ...
  64. chemistry

    Under the appropriate conditions, NO forms NO2 and N2O: 3NO(g) <--> N2O(g) + NO2(g) Use the values for delta G naught for the following reactions to calculate the value of Kp for the above reaction at 500.0 C 2NO(g) + O2(g) <--> 2NO(g) delta g=-69.7 kJ 2N2O(g) <...
  65. Physics - inverse square law (check + help)

    Two identical objects have charges from +6.0*10^-6 and -2.0*10^-6, respectively. When placed a distance d apart, their force of attraction is 2,0N. If the objects are touched together, then they moved to a distance of separation of 2d, what will be the new force between them? ...
  66. Physics - inverse square law(check)

    Two identical objects have charges from +6.0*10^-6 and -2.0*10^-6, respectively. When placed a distance d apart, their force of attraction is 2,0N. If the objects are touched together, then they moved to a distance of separation of 2d, what will be the new force between them? ...
  67. Algebra 1

    solve for x and check you result -4(2x-3)=-8+5
  68. Math (Check

    Subtract and Simplify 2/3 - 1/5 = 1/2
  69. algebra

    Can you check these problems? 3x+13=96 x=6 -8-7x=-120 x=8
  70. Math Help PLEASE

    Divide and Check 4x^9-6x^4+6x^2/2x^2
  71. math

    hi, can someone check these answers for me 1.8-13=-5 2.-4-10=-4 3.5-24=-19 4.7-(-3)=10 5.-2-(-6)=4 6.-18-(-7)=-11 thanks
  72. social studies

    what are check and balances?
  73. math

    solve and check results 3x + 7(x-2)-13=12-3x
  74. math

    Solve,graph,and check 12<6x+b
  75. algebra

    x^+5x-6=0 x^+5x-6=(x+2)(x-3) (x+2)(x-3)=0 x+2=0 or x-3=0 x=-2, or x=-3 check this please let me know if right.
  76. college algebra

    x/2-x/x-4=-4/x-4=-4x^2/2 check this please
  77. college algebra

    3/t-3=5/t+4 3(t+4)(t-3)(5) check this problem
  78. math

    Y^2-4y+3/y^2-9*4y+12/y2-2y+1= 16y^4+36/2y^5+8 check this please
  79. UOP

    necessary to perform a check?
  80. algebra check

    add or subtract, -8-3 -8-3= -8+(-3) 3+8= -11
  81. algebra

    Solve algebraically and check x^2 + 4y^2 = 4 x = 2y - 2
  82. equation

    Solve algebraically and check y = x^2 - 3 x + y = -1
  83. math

    solve the equation and check 1.9(5-x)=1.7(3-x)
  84. algebra

    solve the equation and check -(9x-4)-(2x-6)+7=-8(x-9)-(6x+2)+4
  85. math

    solve the equation and check 1/5(y+3)+3=1/10(7y-4)-5
  86. math

    solve the equation and check -(9x-4)-(2x-6)+7=-8(x-9)-(6x+2)+4
  87. Math - derivative of f(x) (check)

    f(x) - x/(x-1) then f'(x) = -1/(x-1)^2 is that correct?
  88. math 050

    Solve and check 2/3=x/42
  89. Math

    estimate a 15% tip on a $42.65 check
  90. math- check me

    f(x)=3 -4|-11+x| -4|-11+3| -4|8| Do I divide or multiply?
  91. intermediate algebraDivide

    divide and check t^2 - 13 --------- t - 4
  92. algebra

    can you check if im right? -7 + 9 i got 2 -23 - 12 -23 + -12 = -35 8 - (-5) 8 + 5 = 13 -12 + 7 = -4 5 - 14 5 + (-14) = -9 12 + (-8) = 4 8 - 13 8 + (-13) = -5 -5 - 16 -5 + -16 = -21 13 - 17 13 + -17 = -4 -26 + (-14) = -40 -26 + 13 = -13 |-2| + 5 2 + 5 = 7 |-32| + |5| - 25 32 + ...
  93. algebra compare <>=

    can you check if im right? -7 = 7 |-3|= |3| |-9| > -4 8 > -15
  94. algebra

    can you check if right? 3 [(18-3) + 4 (5 +7)] i got 93
  95. Math

    Please check- I got 10 4(9-2)/2^2+3
  96. math

    can you check: 3/5 a = 3 i got : a = 5 is that right?
  97. Algebra

    Divide and check: (3x^2-2x-13)divided by (x-2)
  98. For Reiny

    If you could go back and check my reply to you. thanks
  99. Algebra. .

    Can you check 2/3 k = 60 I got:: 3 2 k = 60 * 3 = 90 ________________ 2 3 1 2 = 2 K = 90/2 K = 45
  100. algebra

    where should l go and check my answers
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