Calculus (Answer Check)

89,119 results, page 48
  1. HS Calculus

    Let f(x) = 2/3-x a) find the slope of the tangent to the graph of f at a general point x0 using the definition of the dervative. b) use the result in part a to find the slope of the tangent at x0=1. I am very confused. My answer for (a) 1/ 6-6x-x^2 (b) -1
  2. physics.

    please check my answers. when a lamp is plugged into a 120 V socket, each coulomb of charge that flows in the circuit is raised to a potential engergy of 120 joules? which offers more resistance to water flow, a wide pipe or narrow pipe? I got wide as my
  3. Math Project..Please help me..

    1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as old as his brother will be. Find their present ages. a. If x = the brother’s age now, write an expression for Samuel’s present age in terms of x. b. Write an expression for the
  4. Math PLEASE HELP

    Please finish these questions so I can check my answers. All my answers are at the bottom. Adding and subtracting mixed numbers. Please finish these questions. The answer must be reduced to lowest terms! 1. 3 2/5 + 6 1/5= 2. 4 2/5 + 1/10= 3. 2 3/12 + 2
  5. math

    please check my answer. each test is worth 100 points. the following test have been taken and earned 91, 90, 93. for a total of 360 points to earn an A, what grade should be made on the final test to earn an A
  6. math

    can you help ; i need to write and solve for each situation. check the solution. school: between 7:30am and 8:00am the number of students in a school increased by 73. there were 152 students in the school at 8:00 am. How many students were in school at
  7. Physics- drwls please help

    (a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States in one year
  8. Literacy

    Please check my work, thank you. Question 1 – 4: Access the Library of Congress library Catalog. Then, find the information to answer the question. 1. What year was the oldest copy of Ralph Ellison’s Going to the Territory published? A. 1952 B. 1986 C.
  9. Chemistry(Please check)

    1) Where in the phase diagram of a compound do all phases exist together? a) at the sublimation point b) at the boiling point c) at the melting point d) at the critical point e) at the triple point I chose answer E, the triple point. Is this correct?
  10. chemistry-check answer

    I was wondering if someone can tell me if I did this right: The gas constant (R) has many different unit formulations. Convert the value of 8.314 (m3-Pa)/(K-mol) into units of (L-mmHg)/(K-mol). This is what I did: (8.314 m3-Pa/K-mol)*(1 atm/101325 Pa)*(760
  11. Dog Hunting Training

    Please check my answer thanks :) True or False The Rhodesian Ridgeback in not considered a versatile hunting breed ( however Pointer Weimaraner and Bruttany are versatile hunting breeds) I said that is True
  12. french

    Can you please check these thanks. Part 1: Complétez 1-2. On peut acheter des tickets de métro au --------- ou au -----------. Answer 1: guichet Answer 2: un distributeur automatique 3. Il faut -------- son ticket dans le tourniquet. Answer: valider 4.
  13. cultural diversity

    1. Native Americans are ambivalent about early intervention programs for children with disabilities because they: A. Have a high tolerance for human imperfection. B.have their own tribal healing ceremonies and rituals. C. Believe programs of that type
  14. dog behavior

    please check my answer thanks Which of the following is an example of an explanatory fiction? A. worry and sadness are the cause of most serious behavior problems B. Dogs fear some places and things because they are not famillar with them C. Dogs are
  15. Government

    Can someone please check my answer for me I'm having trouble on my government practice test. Which of the following is an example of checks and balances? A) Congress can override a presidential veto by two-thirds veto in each house. B) The legislative and
  16. Check 2 of my world history answers??

    star* by my answer 2. All of the following are considered causes of the Great Depression EXCEPT Problems in Agriculture** Uneven distribution of wealth Lack of stock available 7. Hoover believed in which of the following strategies to end the Great
  17. History

    British troops were out moving across the back bay. In Concord and Lexington, trained militiamen were waiting to respond. Where and approximately when is this? Check this site for your answer. Note: the Back Bay is in Boston.
  18. math

    Can someone please check my answers and help me with the last question! 1. Solve sin2xcos2x = 4sin2x on the interval [0, 2pi] 0, pi, 2pi? 2. Exact value of sin(pi/12) - sin(5pi/12) root3/4? 3. Using factorial notation, 0! = 1 False? 4. Find the area of the
  19. Social Studies

    What were the effects of the interstate highway system? 1.it caused decline in air 2.it connected surban areas to metropolitan areas 3.highway constructions projects created jobs 4.it enabled people to drive longer distances at faster speeds my best answer
  20. Science 7R - HW Qs. Check!

    16. Coaches advise athletes to warm up or exercise a few minutes before beginning a sports activity. Explain why warming up is important. My Answer - Warming up helps reduce our risk of injury and the aches and pains that come with exercise. It also
  21. physics

    While blowing its horn of frequency 477 Hz, a car accelerates at 0.94 m/s2. The car starts from rest by your side and moves away. How many seconds does it take for the frequency you hear to decrease by 5%? Hint: Do not forget to include the time it will
  22. chemistry

    I was way off on the other problem. But I see how you got the answer. Last one...thanks i'm learning more here thn class What is the sum of the coefficients (including “1”) of the following reaction? Sodium sulfate + calcium hydroxide ??? Write the
  23. Management Accounting

    well i try to solve this problem but it look so complicated I need to cash buget what's the problem? check the problem i don't get it check the problem i don't get it
  24. English

    1. You can check prices for bicycles on the Internet. 2. You can check prices about bicycles on the Internet. -------------- Can we use 'for' and 'about' in the sentence? Which preposition is commonly used? Can we use some other expressions for 'for?
  25. English

    I really need someone to check my answers so please check. 1.) Hurry down the hall for your next meeting. Phrase: down the hall for your next meeting Verb: hurry Subject:(you)
  26. @please check my answers

    I've removed the entire test you posted. If you post the 4 or 5 you have most doubts about, someone here might check them for you. Do not post entire tests. They will be removed.
  27. Electrolytic Cells

    Hey...can u check my two answers for a and b and can u help on the rest? 8. An electrolytic cell consisting of an aqueous solution of NaCl is set up. Answer the following. a. What is the strongest oxidizing agent present? My answer: Na; sodium b. What is
  28. Calculus

    The radius of a 12 inch right circular cylinder is measured to be 4 inches, but with a possible error of ±0.2 inch. What is the resulting possible error in the volume of the cylinder? Include units in your answer. V = πr²h = 16πr² dV/dr = 32πr dV =
  29. Calculus

    Hi there I am having some troubles trying to do my calculus homework and I really need help trying to do this problem from my homework: Set up the problem and do not solve: The mass of the solid bounded by the surfaces 2x^2 + 2y^2= 9, z=0, z=3 with density
  30. Math ~ Check 1 Answer ~

    Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between one set of values. two sets of values******* three sets of values. four sets of values
  31. Math (please check my answer!!)

    What other information is needed to prove that the two triangles congruent by SAS? Picture description: there are two triangles showing line LT = line MQ and L=M A. <T = <Q B. <G = <N C. Line GT = line NQ << D. Line LG = line MN
  32. Help me please

    Find a number that is decreased by 12 when you form half of the number, explain how you got your answer. It reads to me that n/2 + 12 = n multiply each side by two... n+24=2n subtract n from both sides n-n+24 = 2n-n 24=n check it. Take one half of 24, or
  33. Math

    In one hour, Ed used 2/5 of time to complete his homework and 1/4 of the time to check his email. How much time did he spend completing homework and checking email? Write answer as a fraction
  34. Long and synthetic division

    please check my answers and help me with the last one please, I cant get it to come out right. Divide using long division or synthetic division. 2.(x^2 + 13x + 40)/ (x + 5) I got x + 8 5. 3m^3+7m^2-16m+16/ m+4 i got 3m^2-5m+4 7.(21x^3 - 7)/(3x - 1)(this
  35. Math

    Yvette earned $66.00 for 8 hours of work. Lizbeth earned $68.80 working the same amount of time. How much more per hour did Lizbeth earn than Yvette earned? a. $0.35 b. $0.45 c. $2.80 d. $8.25 Answer-c Please check the above.
  36. True or False health insurance

    please check my answer thanks True or False A type of insurance that was designed to meet the needs of senior citizes is called medicare I say it's true
  37. Calculus

    I am trying to solve a sigma/summation notation problem: n = 99, i = 4 and each term in the sequence is determined by (1/i) - (1/(i+1)). Since n = 99, I think it's safe to assume my professor does not want me to actually go through the process of subbing
  38. english

    what is the complements and is it predicate nominative or predicate adjective? 1.Does the lemonade taste too sour? 2.The window washers on the fifteenth floor appeared tiny. 3. Why does he always look so serious? 4. Our candidate for the city council was
  39. Calculus(answer needed immediatly,thanks)

    A paper cup has the shape of a cone with height 8cm and radius 3cm at the top. Water is being poured into the cup at the rate of 2cm3/s. How fast is the water level rising when the water is 6cm deep?
  40. calculus

    I have a couple of questions that I'm not sure how to do! 1) Given f(x) = (x^2 - 2x + 1) for x does not equal 1 and (k) for x = 1 Determine the value of k for which f is continuous for all real x. a) 0 b) 1 c)2 d)3 e)none of the above i think the anser is
  41. Calculus Help Please!!!

    Two carts, A and B, are connected by a rope 39 ft long that passes over a pulley P (see the figure). The point Q is on the floor h = 12 ft directly beneath P and between the carts. Cart A is being pulled away from Q at a speed of 3.5 ft/s. How fast is cart
  42. Calculus

    The number of Internet host computers (computers connected directly to the Internet, for networks, bulletin boards, or online services) has been growing at the rate of f(x) = xe^(0.1x) million per year, where x is the number of years since 1990. Find the
  43. French

    Could you please check any grammar errors thanks. (My answers are based on my thoughts) 1a. Ta soeur, elle est plus petite ou plus grande que toi? 1b.Tu es plus grand(e) ou plus petit(e) qu'elle? Answer 1a: Ma soeur est plus grande que moi. Answer 1b: Je
  44. Math

    A football coach divides 42 players and 12 coaches into groups. Each group will have the same number of players and coaches. What is the greatest number of groups that can be formed? a. 12 groups b. 6 groups c. 2 groups d. 4 groups My answer is 6 groups
  45. please check my answer

    Consider the following equations. N2H4(l) + O2(g) N2(g) + 2 H2O(l) ÄH = -622.2 kJ H2(g) + 1/2 O2(g) H2O(l) ÄH = -258.5 kJ H2(g) + O2(g) H2O2(l) ÄH = -187.8 kJ Use this information to calculate the enthalpy change for the reaction shown below. N2H4(l) +
  46. math

    is there a way to do this problem or do i have to just guess and check. because by guessing and checking, i can't find the right answer Name a function with the following characteristics: note: f prime means the first deriviative f is continuous over the
  47. Physics;Help!!!!!!

    There is apparently no one online who can help with physics questions right now. Please check back later to see if a physics teacher has addressed your question. Multiple posts won't get faster answers. Thanks. =) The question is in the first question
  48. math

    is there a way to do this problem or do i have to just guess and check. because by guessing and checking, i can't find the right answer Name a function with the following characteristics: note: f prime means the first deriviative f is continuous over the
  49. precalculus

    will someone please check my work? find two sets of parametric equations for the given rectangular equation x+y^2=4 x=-y^2+4 y=-t^2 x=-t^2+4 x=-t^3 y=-t^3+4 Find a polar equation of an ellipse with its focus at the pole an eccentricity of e=1/4 and
  50. Check my answer?

    An indorser's implied contract to pay a subsequent holder in the event that an instrument is dishonored is known as an indorser's? A. duty B. accommodation C. primary liability D. secondary liability I chose Secondary liability
  51. precalculus

    Can you check my answers? find two sets of parametric equations for the given rectangular equation x+y^2=4 x=-y^2+4 y=-t^2 x=-t^2+4 x=-t^3 y=-t^3+4 Find a polar equation of an ellipse with its focus at the pole an eccentricity of e=1/4 and directrix at
  52. French

    Could you please check these answers thanks for your time. Directions (Give with my own answers) 1. Tu prends ton petit déjeuner à la maison ou à la cafétéria de l' école? Answer: Je prends mon petit déjeuner à la cafétéria de l' école. 2.
  53. Calculus

    Consider a differentiable function f having domain all positive real numbers, and for which it is known that f'(x)=(4-x)x^-3 for x>0. A. Find the x-coordinate of the critical point of f. Determine whether the point is a relative maximum, a relative
  54. Calculus II

    With Taylor/Maclaurin polynomials Use the Remainder Estimation Theorem to find an interval containing x = 0 over which f(x) can be approximated by p(x) to three decimal-place accuracy throughout the interval. f(x) = sin x p(x) = x - 1/6 * x^3 The book
  55. english

    can someone check these over. I have to pick out the sentence that is wrong. 1. wrong use of the word divinity a. Christian divinity students study Hebrew.... b. Dagon, the chief divinity of the Philistines, was represented as a half human half fish. c.
  56. Calculus

    f(x)= x/(1+x)^2 a) find the intervals on which f is increasing or decreasing. Is it ....f is decreasing on the intervals (- infinity, -1) and (1, infinity)...f is increasing on the interval (-1, 1)....... b)find the local min and max values of f.. For
  57. Math calculus

    The altitude of a triangle is increasing at a rate of 1000 centimeters/minute while the area of the triangle is increasing at a rate of 1500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 7000 centimeters
  58. Physics- check answer please

    A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond b) light travelling from diamond into air c) light travelling from water into diamond d) light travelling from diamond into water Would the answer be a)?
  59. SOCIAL STUDIES Check answer

    Which of the following is a reason for the start of the war of 1812? A) congress placed an embargo on US shipping B) the XYZ affair caused tensions with Britain C) the US was in dispute with Great Britain over the Northwest Territories***** D) Great
  60. U.S. History

    please check this answer 1. A major goal of the encomienda system was to a. force Native Americans to work for Spanish colonist b. drive Native Europeans off their land c. help Europeans adapt to Native American culture d. prevent the development of social
  61. Chemistry(Please check)

    identify the functional group and indicate polar bonds by assigning partial positive and negative charges. 1) The structure CH3OCH3 is drawn out and I know that this is an ether because the O is bonded to two carbons but I am not sure how to assign the
  62. dog behavior

    please check answer thanks Modeling is a training technique that involves A. providing one dog as an example for another dog to follow B. giving positive reinforcement for correct behavior C. using dependent and independent variables in an experiment D.
  63. STATISTICS

    A statistics practitioner formulated the following hypothesis: H0 : ¦Ì = 200 against H1 : ¦Ì < 200 and learned that x = 190 n = 9 and ¦Ò = 50. The p-value of the test is (1) 0.6 (2) 0.2743 (3) 0.7743 (4) −0.2743 (5) Cannot be found with
  64. math,algebra,correction

    x = (-5 +/-ã85)/10 do you mean -0.5 or -5 is this right? solve by using the quadratic formula: 5x^2+5x=3 i get: x= -0.5 (+/-)((sqrt(85)/(5)) check up on your proper use of the formula I got x = (-5 +/-√85)/10 which, if you want to separate it into
  65. History

    What is the main reason some people believe there should not be any limits on presidential terms? A. There should be a monarch instead of a president. B. The people should decide how long a president can serve in a democracy.<<<<< C.
  66. Math

    John wants to hire an editor to check his thesis paper. The editor charges a flat rate of $50 and $2 per page. Write a polynomial to describe the cost. Find the cost of editing 75 pages. Calculations: Answer: Polynomial:
  67. Please check my answer(Social Studies)

    In the Mayflower compact, why do the pilgrims "all due submission and obedience"? To show that they will remain sevants of God To show that they will follow the colony's rule•• To show that they will elect a colonial leader To show that they will
  68. Poem: Hanging fire by Audre Lorde

    Could you check these answers thanks. 1. Did you feel more or less sympathy with the girl speaking in "Hanging Fire," than with the one speaking in "Young," explain your answer. Answer: I felt more sympathy with the girl in "Hanging Fire," because she's
  69. Science 8 - Check Answers

    Please Check Answers. 4. When a fan is turned on, it changes electrical energy into ______ energy. A. motion * B. magnetic C. gravitational D. electromagnet 5. An experiment discovered that a particular material was a poor conductor of electricity. This
  70. chemistry

    Which of the following is the formation reaction for CaO(s) ? can you check my answer(the one that has star next to it) A. Ca(s) + 1/2O2(g)= CaO(s). B. CaO(s)= Ca(s) + 1/2O2(g) C. Ca2+(aq) + O2–(aq)= CaO(s) D. 2 Ca(s) + O2(g)= 2CaO(s) (*) E. 2 CaO(s)= 2
  71. Math

    To make green paint,Jeff's art teacher instructed him to mix blue and yellow paint. To make the desired shade of green, the ratio of blue paint to yellow paint is 3:4. What does this ratio mean? My Answer: It means comparing part to part (comparing how
  72. Calculus

    The maker of an automobile advertises that it takes 11 seconds to accelerate from 15 kilometers per hour to 90 kilometers per hour. Assuming constant acceleration, compute the following. What is the distance the car travels during the 11 seconds (Round
  73. Calculus (math)

    The velocity function (in meters per second) for a particle moving along a line is given by v(t)=t3−5t2. Find the displacement and the distance traveled by the particle during the time interval [-1,6]. Distance traveled = ?? I got 2089/12m as answer
  74. Calculus

    Evaluate the Riemann sum for (x) = x3 − 6x, for 0 ≤ x ≤ 3 with six subintervals, taking the sample points, xi, to be the right endpoint of each interval. Give three decimal places in your answer and explain, using a graph of f(x), what
  75. chemistry

    someone can check my answer for me? and b) Shape and Bond Angle answer would be great too! :) a) NF3 Structure = 26 electrons, Shape = trigonal pyramidal, Bond Angle = 105.5. b) TeCI2 Structure = 30 electrons, Shape = ? Bond Angle = ? c) CCI4 Structure =
  76. Calculus

    The slope of the tangent line to a curve at any point (x, y) on the curve is x/y. What is the equation of the curve if (4, 1) is a point on the curve? x2 − y2 = 15 x2 + y2 = 15 x + y = 15 <- my answer xy = 15
  77. Pre-Calculus

    Verify: 1/(1-sintheta) * 1/(1+sintheta) = sec^2theta sec^2theta is the answer, it would be great if someone can do the steps for me. thank you.
  78. calculus

    Solve for x: S(0 to x) (t^3-2t+3)dt=4 I got a different answer from the back of the book. The back of the book said that x=1.63052 or x=3.09131. How am I suppose to solve this using a calculator?
  79. Calculus III

    I'm supposed to find the expression 'y', when (x^2+100)y'=23 When y(10sqrt(3))=0 Also, I have to find the indefite integral of xsqrt(19x-7), using integration tables in the back of the book "Calculus of a Single Variable, 8th Edition." Tables are in
  80. math

    Lydia is comparing two checking accounts, one has a monthly fee of $10 and a per-­check fee of $0.10, and the other has a monthly fee of $5 and a per­-check fee of $0.25. What is the minimum number of checks Lydia needs to write for the first bank to be
  81. French

    Could you please check these thanks. Directions: Respond saying yes 1. Tu vois des choses que tu aimes dans la vitrine? Answer: Oui, je vois des choses que j'aimes dans la vitrine. 2. Tu crois qu'on peut entrer dans la boutique? Answer: Oui, crois qu'on
  82. Math Check

    Let’s say you have a bedroom drawer that contains about 2 red socks, 4 white socks, and 8 blue socks. Without looking in the drawer, you pick out a sock, take it back, and then pick out a second sock. What could the probability be if the first sock is
  83. Chem Check Please!!!

    A voltaic cell is constructed that uses the following reaction and operates at 298 K: 2 Al(s) + 3 Mn2+(aq) 2 Al3+(aq) + 3 Mn(s). What is the potential, E, of this cell when [Mn2+] = 0.10 M and [Al3+] = 1.5 M? Answer: The EMF of this cell under standard
  84. math(check my answers)

    SOLVE THE FOLLOWING EQAUTION BY COMPLETING THE SQUARE: 3. xsquared - 8x - 10 = 0 xsqaured -8x=10 xsquared-8x+(8/2)sqaured=10+(8/2)sqaured xsquared-8x+16=26 Answer: xsqaured-8x+16=26 WHAT DID I DO WRONG?
  85. Health Law

    please check my answer thanks :) Sue says that her claim is based on the fundamental law of nation what does that mean(what source is Sue relying on) I think Sue is relying on the constiution
  86. math (please check answer)

    10. You have six $1 bills, eight $5 bills, two $10 bills , and four $20 bills in your wallet. You select a bill at random. Without replacing the bill, you choose a second bill. What is P($1, then $10)? A. 77/190 B. 3/100 C. 3/95*****? D. 2/5
  87. Math

    1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as old as his brother will be. Find their present ages. a. If x = the brother’s age now, write an expression for Samuel’s present age in terms of x. b. Write an expression for the
  88. Calculus

    My book says to do the following problem via computer and via hand: Calculate the definite Integral of e^-x * cos x dx over (0, +infinity) My TI-89 calculator gets 1 (it gets the same thing when I replace infinity with 999). when I do this by hand, I get:
  89. Calculus

    The curved section can be modelled by the parabola y=3x-3/4x^2 Use calculus to find the maximum height of the curved parabolic section. How do I do this step by step?
  90. calculus(work)

    a rectangular water tank has a length 20 ft, width 10 ft , and depth 15 ft . if the tank is full , how much work does it take to pump all the water out (using calculus)?
  91. Geometry

    Help? check Line segment AB intersects line segment ED in the middle at the point C If DC=6+x and CE=2x+1, what is the lenth of ED? A. 5 B. 11 C. 22 D. 10 Answer: C Line segment AB intersects line segment ED in the middle at the point C If DC=6+x and
  92. Geometry

    Help? check Line segment AB intersects line segment ED in the middle at the point C If DC=6+x and CE=2x+1, what is the lenth of ED? A. 5 B. 11 C. 22 D. 10 Answer: C Line segment AB intersects line segment ED in the middle at the point C If DC=6+x and
  93. Geometry

    Help? check Line segment AB intersects line segment ED in the middle at the point C If DC=6+x and CE=2x+1, what is the lenth of ED? A. 5 B. 11 C. 22 D. 10 Answer: C Line segment AB intersects line segment ED in the middle at the point C If DC=6+x and
  94. English

    1. Did you know? + Where did he go? => Did you know where he went? 2. Did you think? + Why was he late? => Did you think why he was late? => Why did you think he was late? - I thought he was late because he got up/gotten up late. 3. Did he know? +
  95. Calculus

    Find the minimum value of the following function: h(x)= x-(12(x+1)^(1/3) -12) on the interval [0, 26] Honestly, I have found by graphing that the minimum value is at the coordinate point (9,-3), but I need to do this in a way that uses a more
  96. History

    Can someone please check my history questions? 1) Republicans were responsible for the passage of the Thirteenth Amendment, which effectively nullified the Three-fifths Compromise. Why was this an issue of concern for Republicans? A) because it meant that
  97. maths-check my answer

    change the subject of the formula make x the Subject of the formula y = 1/2 x + 1 -2 from both sides y-2 = 1/2 x ÷ by 1/2 from both sides y-2/1/2 = x
  98. Algebra

    1. (2x-6)/(21) divided by (5x-15)/(12) 2. Solve (x)/(x-9)-4=(9)/(x-9)..I got -6, is that correct? 3. Add. Express your answer in simplest form...(4)/(s)+(6)/(s^2).. 4. Add. Express your answer in simplest form...(x^2)/(x+4)+(8x+16)/(x+4) Lets check you
  99. calculus

    1.Find the following for the function f(x)=(x+6)^2(x-2)^2 a. what are the x and y-intercepts? B. Does the graph cross or touch the x-axis? c. Does the graph cross or touch the x-axis at the larger x-intercept? 2. Which of the following best describes how
  100. science- please check my work.

    Aspirin (C9H8O4) is produced from salicylic acid (C7H6O3), and acetic anhydride (C4H6O3): C7H6O3 + C4H6O3 ¨ C9H8O4 + HC2H3O2 How much salicylic acid is required to produce 2.0 102 kg of aspirin, assuming that all of the salicylic acid is converted to