Calculus (Answer Check)

89,119 results, page 32

    Can somebody please check my work. I got part a right, but my answer for part b is wrong. (a) Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 25.6 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is
  2. calculus

    Consider the given function. f(x) = 3 sin(6x) text(, ) 0<=x<=(3pi)/2 (a) Find the Riemann sum with six terms, taking the sample points to be right endpoints. (Give your answer correct to six decimal places.) R6 = (b) Repeat part (a) with midpoints as
  3. calculus

    Consider the given function. f(x) = 3 sin(6x) text(, ) 0<=x<=(3pi)/2 (a) Find the Riemann sum with six terms, taking the sample points to be right endpoints. (Give your answer correct to six decimal places.) R6 = (b) Repeat part (a) with midpoints as
  4. Calculus

    Answer the following questions for the function f(x) = sin^2(x/3) defined on the interval [ -9.424778, 2.356194]. Rememer that you can enter pi for \pi as part of your answer. a.) f(x) is concave down on the interval . b.) A global minimum for this
  5. Science -Check Answers-

    1. A kitchen ceiling light has five light bulbs on it. When one of the lights goes out, the other four bulbs stay lit. This is an example of a series circuit. True OR False My Answer: True 2. Adding a _______________ to an electric circuit would increase
  6. Chemistry

    Icebergs in the North Atlantic present hazards to shipping, causing the length of shipping routes to increase by about 30 percent during the iceberg season. Attempts to destroy icebergs include planting explosives, bombing, torpedoing, shelling, ramming,
  7. Science - Please Check My Four Answers

    Please help me with the following questions: 1. Which is usually the best way to present or communicate inferred data? A. in a bar graph B. in a data table C. in a simple diagram D. in a written paragraph I know the answer isn't C or D(I got C wrong), but
  8. english

    Could someone check my work? Ms. Sue thank you for checking for me!! A commercial critizing oil drilling shows images of oil-soaked birds and sea otters that are suffering. This commercial is using pathos (answer) ethos logos A commercial for toothbrush
  9. Calculus

    A common inhabitant of human intestines is the bacterium Escherichia coli. A cell of this bacterium in a nutrient-broth medium divides into two cells every 20 minutes. The initial population of a culture is 69 cells. (a) Find the relative growth rate.
  10. French

    Could you please check these and help me with #s 10, 14, 15, 17, and 18. I'm sorry but I just don't understand these. I read the textbook but still nothing. Thanks for all the help:))) Directions: Use the clues to help you figure out the missing word. 1.
  11. Calculus Finals Review sheet!! Explanation needed

    Here is a graph of the derivative y' of a continuous, differentiable function. For approximately what values of x between −5 and 5 does the original function y have inflection points? Find limit as x approaches 3.5 [[x-2]]/x (Remember that
  12. chemistry

    Predict the precipitate that forms: HCl + AgNO3 --> ??? i don't know what the answer is but i think it is Cing04 AgCl. You need to learn the solubility rules. If you don't have a web site I can give you one. hey watz up can you help me with a question
  13. Math

    Please double check my answer. On three consecutive passes, a football team gains 7 yards, loses 22 yards, and gains 49 yards. What number represents the total net yardage? My answer: The total net yardage is 34 yards.
  14. Calculus

    An airplane flies at an altitude of 5 miles toward a point directly over an observer. The speed of the plane is 600 mi/hr. Find the rate at which the angle of elevation is changing when the angle is 30 degrees. I found the answer to be 60 radians/hr by
  15. Math Help please Check my answer

    You have $59.95 in your wallet and want to buy some new CDs. If the CDs are $11.99 each, what number of CDs, x, can you buy? Write and solve an inequality. My answer: 11.99x ≤ 59.95 11.99x/11.99 ≤ 59.95/11.99 x ≤ 5
  16. Calculus: Derivatives

    I'm having trouble understanding what derivatives in calculus (instantaneous speed) is. Can someone please explain it to me, or provide some easy links to learn from? Thanks!

    what is the derivative of ln(x-1)? If you are studying the calculus of logarithms your question surprises me, since that is one of the most basic ones in that topic. in general if y = ln("anything") then y' = 1/"anything" * derivative of "anything" just
  18. Calculus I Theorem

    I factored and simplified dy/dx of 192x^5 + 96x^3 + 12x all the way down to x^2 = u = (-1/2) and (-1/6). How does the result illustrates part 1 of the Calculus Fundamental Theorem?
  19. Calculus

    Determine the convergence or divergence of the series. Indicate the test that was used and justify your answer. Sigma (lower index n = 1; upper index infinity) [(-1)^n*3^n]/(n*2^n)
  20. calculus

    Find the arc length of the graph of the function over the indicated interval. (Round your answer to three decimal places.) y = ln (sin(x)) ,[π/4,3π/4]
  21. calculus

    Find the average rate of change of the function over the given interval. You must reduce and simplify your answer, if possible. a. f(x)=cot x, [pi/6, pi/2] b. f(theta)= -2 + cos (theta), [-pi, 0]
  22. calculus 2

    Consider the solid obtained by rotating the region bounded by the given curves about the line x = -3. y = x^2 , x = y^2 Find the volume V of this solid. I keep finding the wrong answer.
  23. Calculus

    The function defined below satisfies Rolle's Theorem on the given interval. Find the value of c in the interval (0,1) where f'(c)=0. f(x) = x3 - 2x2 + x, [0, 1] Round your answer to two decimal places.
  24. Calculus

    Use Simpson's Rule with n=10 to estimate the arc length of the curve. Compare your answer with the value of the integral produced by your calculator. x = y + y^(1/2), 1 ≤ y ≤2
  25. Calculus

    What kind of discontinuity is this: F(x)= (2x^2 - 5x -3)/(x-3) if x does not equal 3 6 if x=3 It is a pieces use function. I thought it was removable but my answer key says it is a jump discontinuity. This is from an exam review and I want to get it right.
  26. Calculus

    Estimate the area of the region under the curve y = ln(x) for 1 ≤ x ≤ 4. Use the left hand rule with n = 50. Give your answer to four decimal places.
  27. math 160(buss calculus)

    my homework is due in 1 hour Let x = 1 and Δx = 0.01. Find Δy. (Round your answer to five decimal places.) f(x) = x/x^2 + 5
  28. college calculus

    find a and b so that f(x)=x^2+ax+b has a local min at (6,-5) i found the derivative: f'=2x+a then i found a 0=2x+a 0=2(6)+a 0=12+a a=-12 but i can't seem to get the correct value for b. i plugged -5 into the original function, but my book says the answer
  29. Calculus 1

    Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) f(x) = x^(5)e^(-6x)
  30. calculus

    Estimate the area of the region under the curve y = ln(x) for 1 ≤ x ≤ 5. Use the left-hand rule with n = 50. (Round your answer to four decimal places.)
  31. calculus

    The given curve is rotated about the y-axis. Find the area of the resulting surface. y = 1/4x^2 − 1/2ln x, 4 ≤ x ≤ 5 The answer is supposed to be 64/3*pi
  32. Calculus

    A mineral deposit along a strip of length 8 cm has density s(x)=0.07x(8−x) g/cm for 0≤x≤8. Calculate the total mass of the deposit. Your answer must include units.
  33. calculus

    x^2 + y^2 = 25 3x + y = 15 Find the two points of intersection. I don't just want the answer, if you could tell me how to find it, it would save my life. The sqaure root is making it really hard for me to understand.
  34. calculus

    Estimate the area of the region under the curve y = ln(x) for 1 ≤ x ≤ 4. Use the left hand rule with n = 50. Give your answer to four decimal places.
  35. Calculus

    Solve : sec^2(x)= ã3*tanx + 1 on [0,radian-180 degrees) - couldn't find the symbol for radian on computer please try and explain how you got your answer best as yu can thanks so much :)
  36. Calculus

    I need help creating an equation for a piecewise defined function with two different rules, that is continuous but not differentiable at the point where the rules change, x=3. Please help to justify the answer.
  37. Setting up a chem problem

    Magnesium reacts with water in the equation, Mg+2H²O-->Mg(OH)²+H². You have 8.1 g of magnesium available. This means you will need ___ g of water to use all the magnesium. This seems sorta simple, but how can i set it up? These are stoichiometry
  38. Algebra I

    I'm stuck on this problem please help me find the range of this equation y = (x^2 - 4)/(x^2 - x - 12) I know that it is [1/3,-infintiy]U[?,infinity] yes I'm having trouble with that ? At first I was like ok there should be a horizontal asymptote at y=1
  39. true/false history

    hi everybody. I have been trying to answer these true/false question all day, can someone help me please?Are my answers correct? "Militarism" is warfare that combines the use of infantry, armor, and air power in a fast-moving campaign. I put false &
  40. pre calculus

    32% of a particular radioactive substance disappears in 227 years. Part 1: Find the decay constant. Your answer must be correct to five decimal places. Part 2: Determine the time T in years required for 93% of the substance to disapper. Your answer must be
  41. Calculus

    estimate the absolute maximum and minimum values of f if any, on the stated interval, and then use calculus methods to find the exact values: f(x)=10ln(x^2+1)-8x; [0,3]
  42. calculus

    Verify the identity: arctanx + arctan(1/x)=∏/2 using calculus theory. (Hint: Differentiate the left hand side of the identity)
  43. Chemistry

    Can someone check my answer for me... 1)Suppose a piece of lead with a mass of 14.9 g at a temperature of 92.5 degrees is dropped into an insulated container of water. The mass of water is 165 g and its temperature before adding the lead is 20.0 degrees.
  44. Calculus

    A stone is dropped from the upper observation deck of a tower, 200 m above the ground. (Assume g = 9.8 m/s^2.) a)Find the distance (in meters) of the stone above ground level at time t. b)With what velocity does it strike the ground? (Round your answer to
  45. Calculus

    Apply the concepts of calculus (limits and derivatives) to describe the graph y = sec(x). Include a quality graph
  46. Solved-Calculus-Please check?

    the equatorial radius of the earth is approximately 3960 miles. suppose a wire is wrapped tightly around the earth at the equator. how much must this wire be lengthened if it is to be strung on 10 feet poles above the ground? (1 mile=5280 feet) delta y=
  47. calc

    d/dx integral from o to x of function cos(2*pi*x) du is first i do the integral and i find the derivative right. by the fundamental theorem of calculus, if there is an integral from o to x, don't i just plug the x in the function. the integral of the
  48. French

    Could you please check these thanks. Directions: Read the conversation between Cécile and Pierre and answer the questions below. Départ à destination de Toulouse, vol Air France numéro 6106. Embarquement immédiat, porte 24. Cécile: C'est notre vol.
  49. Chemistry

    X2 + Y2 <=> 2XY 0.50 mole each of X2 and Y2 are placed in a 1.0 litre vessel and allowed to reach equilibrium at a given temperature. The equilibrium concentrations of XY is found to be 0.025 mol/L. What is the equilibrium cosntant for this reaction?
  50. MATH 115

    I have math questions I need to check my answers can you please help me 1. 4x4x4x4x4 as a power of 4 answer 4 to the fifth power 2.a bedroom is 10 ft by 11 ft what is the perimeter? answer 42 ft evaluate 72/8-9/3=6 3.Jamal is fencing a rectangular field
  51. English 10

    Which of the following is a possible setting for works of American literary realism? CHECK ALL THAT APPLY! *a. American West *b. Post-Civil War South c. New England d. Gold Coast I think there is one more that needs to be check, but I don't know which one
  52. Spanish-Please check my work

    Could someone please check this for me. I had to rewrite the following sentence using a direct object pronoun in two different ways. I wrote: Nosotros queremos leerlos. Los hosotros queremos leer. Thank you for checking
  53. Calculus--Reiny

    Calculus - Reiny, Friday, December 23, 2011 at 6:59pm I read that as (4a^2-1)/(4a^2-16) * (2-a)/(2a-1) , my brackets are necessary = (2a+1)(2a-1)/( 4(a+2)(a-2) * (2-a)/(2a-1) the (2-a)/(a-2) are opposite, they will give you the -1 so.. = -(2a+1)/(4(a+2)) ,
  54. Math (check answer plz)

    13. A true-false test has 12 questions. What is the probability of guessing the correct answers to all of the questions? (1 point) A: 1 over 4096*******? B: 1 over 144 C: 1 over 24 D: 1 over 14
  55. Health/ Basic Clinical Procedures

    please check my answer thanks True or False Korotkoff sounds are related to the determination of blood pressure I picked True
  56. Math

    The slope of the line is? (1,2) and (-2,-1) Positive •• Negative Zero Undefined Just a disclaimer I did post this earlier but nobody helped me and if anybody read my other post it didn't make since so I'm sorry Check my answer
  57. Assistance Dogs

    Please check my answer thanks :) Service dogs are often taught to recall to a person A. sitting in a wheelchair. B. lying down. C. standing with crutches. D. kneeling down I picked A
  58. English

    The sentence below requires a citation. In the last three years, Ford has sold more automobiles in America than any other auto-manufacturer. 1.True 2.False I say False. Please check my answer.
  59. chem can u check answer please

    the solubility of silver sulfate in water is 0.223%(w/v) at 35 degrees celsius.calculate the solubility product of this salt at this temp. I got 1.46 X 10^-6 M is this right please thanks Andy
  60. Check my answer please!

    I think its decades Jill enjoys reading about American history, especially the last 40 years, or four _____________, of the nineteenth century. A. centuries B. millennia C. decades D. eras
  61. Math 115

    Please check answer. The sale tax rate in a state is 7.5%. If you pay a tax of $17.50 on an item that you purchase, what is its selling price? 17.50*7.5=$131.25 is this correct?
  62. Algebra 2

    Hey, I don't understand this question I have honestly done this question about a good 3 times but never seemed to get the right answer. Please Help!!! Solve each equation by factoring. Check your answers. 7x^2=21x
  63. english

    Please check my answer because i don't know for Sure Which pronoun or pronouns correctly complete the sentence? Everybody had chosen __________ own meal to eat on the field trip. A. its B. his or her C. their D. they're I think it is either B or C but i
  64. History of health care

    Please check my answer thanks :) If you need to talk to someone about getting additional coverage to Medicare Parts A and B what organization should you contact ? I am not to sure is it Blue cross and Blue Shield
  65. algebra I

    please check my answer 2/3x-24 less than/equal to 8 = x less than/equal to 12
  66. Algebra

    x^2-5x=-10 =x=5+i sqrt15/2 ,5-i sqrt15/2. CAN SOMEONE CHECK MY ANSWER.
  67. Math

    7 1/5x 2 1/6= 36/5 x 13/6=468/30 468/30= 15 6/30 Can you please check on the answer and the above.
  68. algebra

    please check the following answers and review the questions. tank you 1. 2/3 * negative 6 * 5 my answer: -100 2. a landscaper installs 12 sections of trellis. each section of trellis is 3/4 yard long. how many yards of trellis are installed altogether? my
  69. Precalculus...repost.. The tutor didn't quite answ

    Calculate the solution set. x^2+y^2+8x=-15 9x^2+25y^2=225 My work: I did elimination...multiplied -25 to the top equation and got..... -16x^2-200x-600...I then used quadratic formula ... And got -7.5 and -5..... Is -7.5 an EXTRANEOUS SOLUTION because when
  70. physics. Can you check my answer?

    Two spherical objects are separated by a distance of 2.41 x 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As
  71. dog behavior

    please check my answer thank you very much for your help The Premack princciple suggets that A. reinforcement is highly frustrating the dog B. A more desirable activity can serve as a reinforcer for aless desirable activity C reinforcement isn't dependent
  72. calculus

    Locate the position of Sun,using calculus---using differential euation on sign curve of Sun's path.
  73. calculus

    Can someone please tell me what the word "WHOLE" AND "IRRATIONAL" MEAN IN CALCULUS? THANKS
  74. calculus

    I need help with this calculus problem. H(S)=S/(1+S) If F 1/2, -1/2 & (a+1)? I can't figure out what this mean /?
  75. calculus

    Calculus A, Evaluate the following integral : ç (x^2+3x-2)dx
  76. Math

    calculus help needed example: sin-1(-1/2) how do you figure this out? The sin^-1 means the arcSin, or the angle whose sine is ... so sin^-1(1/2) is the angle whose sine is -.5, which is -30 degrees. In your calculator, put in -.5, then press INV sin. so as
  77. mathematics

    Train L and Train M leave a station at the same time heading in opposite directions. Train L is going north at an average speed of 70 miles per hour (mph). Train M is going south at an average speed of 85 mph. How long does it take each train, in hours, to
  78. calculus

    the fence around a rectangular compound costs $4 a foot for three of the four sides. the fourth side is the wall of a building, so no fence is needed for that side. we will call the distance of the fence parallel to the wall w for width and the two other
  79. English

    I urgently need to know if the word choice and tenses are correct. Thank you. 1) Enter the airport and check your flight number and the boarding time of your flight on the departures board. 2) Before going to the check-in desk make sure your baggage
  80. Applied Dog Behavior

    Please check my answer thanks 7. _______ reported using a "cricket" to train animals as early as 1951. A. B. F. Skinner B. Ivan Pavlov C. Gary Wilkes D. Sigmund Freud I picked A
  81. Chemistry

    Can someone please check to see if I balanced this chem. equation which is an incomplete combustion reaction: 2C3H8 + 11O2 ->> 3CO2 + 4H2O +2CO +C(s) My answer: 7C3H8 +22O2 -->> 6CO2 + 28H2O +4CO +11C Thanks!
  82. Math

    The result of reflecting across the line y = x and then rotating 330 degrees counterclockwise around the origin is an isometry T . Represent T by a 2 ⇥ 2 matrix. There is more than one way to do it. Use the point (1, 1) to check your answer. I know how
  83. Health/Specialty Exams and Advance Techniques

    Please check my answer to this question thank you Early detection of testicular cancer relies on A a cystoscopy B self-exam by the patient C good nutrition D exercise I picked B
  84. Social Studies ( Check my answer)

    1. What group of people made up the largest percentage of workers in American industry during the late nineteenth century? Native Americans Immigrants *** Plantation Owners
  85. S.S

    1)Which geographic feature marks the last natural obstacle for Georgia’s rivers on their way to the Atlantic Ocean? A)the Floridian Aquifer B)the Valley and Ridge region C)the Fall Line D)the Marshes of Glynn<<?? Check my answer please.
  86. history

    Offer evidence to prove that the Congo Free State violated Articles I,V,and VI of the Berlin Act of 1885. Check this answer.
  87. Chemistry answer check

    What quantity of heat is required to produce 5 mol of oxygen gas by this reaction? HgO(s) → Hg(l) + ½ O2(g), ΔH = +90.7kJ I calculated 90.7*5, but my online homework says its wrong how do I calcuate this?
  88. World History (check answer)

    Which characteristic of the Avignon papacy drew harsh criticism? A. inclusion of women in Church services B. lavish lifestyle C. persecution of non-Christians*** D. worship of icons
  89. health

    which of the following structures are regions of the lungs? a. frontal, maxillary, sphenoidal, ethmoidal b.eustachian, pharynx, bronchi c. cilia, adenoids, mucous, epigilottis d.apex, base, hilum d could someone check my answer
  90. Math156-check my answer please

    a tennis magazine averages 150 pages per issue, there are 7 adds for every 3 pages. how many ads would you expect in a typical issue ? 150 divided by three =50 50 x 7 ads =350 my answer is 350 ads would be in an issue Is this correct ?
  91. Pre-Calculus

    I am in Honors Pre-Calculus and am having a hard time understanding my teacher. I feel so stupid. Does anyone have any suggestions on a website that might give me some insight into what I am doing wrong? Thanks!
  92. MATH

    I have math questions I need to check my answers can you please help me 1. 4x4x4x4x4 as a power of 4 answer 4 to the fifth power 2.a bedroom is 10 ft by 11 ft what is the perimeter? answer 42 ft evaluate 72/8-9/3=6 3.Jamal is fencing a rectangular field
  93. Science(check answers)

    I printed out a summer activite to test my skill on science and i found some that i stumbled upon and couldn't figuire out so help? If im wrong then please correct me. 2.A 3.B 4.B 5.A 6.B 2.Giraffes have long necks that allow them to eat leaves in trees.
  94. Calculus

    Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2, x=y^2, about the axis x=-5... i just cant seemt to get the numbers to work out well and get answer please help...thanks
  95. Calculus

    I need help with finding first and second derivative--simplify your answer. Y=xtan(x) I solved first derivative xsec^2(x) + tan(x) I don't understand how to get the first...can someone show me the steps with explanation?
  96. Calculus 1

    Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) F(x) = x^4/5(x − 1)^2
  97. Calculus

    Find the critical numbers of the function. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) h(p) = (p − 2)/(p^2 + 9)
  98. Calculus

    Derivative Differentiate f(x)=(5x-4)^2 There are two ways to do this: (1) let u = 5x-4, and use the "chain rule", df/dx = df/du * du/dx OR (2) expand the polynomial to f(x) = 25 x^2 -40x + 16 and differentialte it term-by-term. You will get the same answer
  99. Calculus

    True/false: x^2-3 is concave up on the interval (-1,1) The second derivative of x^2-3 is just 2. How do I determine concavity of a function when I can't set it equal to 0? And then how do I answer this question when it's asking for a specific interval?
  100. calculus

    Determine the value(s) of x where the function will have an instantaneous rate of change of 14. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) f(x) = x3 + 33 x2 + 14 x + 39