Calculus (Answer Check)

88,560 results, page 28

  1. 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
  2. calculus 2

    Integral of 63x(cos(x))^2 dx I got: 63x^2/4 +63sin(2x)/4 +63cos(2x)/8 +C I keep getting this answer but the online site says it's wrong.
  3. calculus help

    use the midpoint rule with the given value of n to approximate the integral. round the answer to four decimal places. integral 0 to pi/2 2cos^3(x)dx, n=4 M4=????
  4. 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.) h(t) = t^(3/4) − 3t^(1/4)
  5. 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
  6. Calculus

    The side of a square is measured to be 10 ft with a possible error of ±0.1 ft. Use differentials to estimate the error in the calculated area. Include units in your answer.
  7. Calculus

    The divergence test applied to the series ∑n=1 to ∞ 3n/(8n+9) tells us that the series converges or diverges? I got that it was divergent because it was undefined at infinity, is my answer right?
  8. 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) = 4x3 + x2 + 4x
  9. Calculus

    The side of a square is measured to be 16 ft with a possible error of ±0.1 ft. Use differentials to estimate the error in the calculated area. Include units in your answer.
  10. Single Variable Calculus

    find an expression for the area under the graph of f(x)= (x^2)+x from x=2 to x=5 as a limit of a riemann sum (do not need to evaluate). the answer i got was: lim as x-> infinity of sigma from i=2 to n of (2+3i/n)^2+(3i/n)(3/n) is this correct?
  11. Pre Calculus 12

    Laws of logarithms evualuat using change of base rule log(√8)16 ^the square root 8 is supposed to be subscript. the answer i got was 8/3, not sure if that is right
  12. Calculus

    A function of three variables is given by, f (x,y,t) = x3y2sin t + 4x2t + 5yt2 + 4xycos t Find ft (3.44,0.58,8.1) giving your answer to 3 decimal places. anybody please help me... thanks a million... got stuck with this qns..
  13. calculus

    First, the bond pays 96 + 7 t per year for 10 years. Second, the interest rate is 5.25% compounded continuously. Round your answer to the nearest cent. Find the present value?
  14. Calculus Partial Derivatives

    Problem: Find dimensions of a box that provide the greatest volume when the length plus the girth cannot exceed six feet. I tried 2w+2h+l=6, l=6-2w-2h, but couldn't get to w=1, h=1, l=2, which is the correct answer.
  15. Calculus

    Use the Left and Right Riemann Sums with 80 rectangle to estimate the (signed) area under the curve of y=e^(3x)−5 on the interval of [10,20]. Write your answer using the sigma notation
  16. Calculus

    A particle moves along the x-axis with position function s(t) = e^cos(x). How many times in the interval [0, 2π] is the velocity equal to 0? 1< My answer 2 3 More than 3 I don't really get this question will someone please explain it to me?
  17. calculus

    I've tried this problem about 20 times and a bunch of different ways and I can't seem to get it right. The problem is: Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. Where y=1/(x^3), y=0, x=4, and x=8. I know ...
  18. Calculus

    State whether the following are true or false. The square roots of 36 are + and - 6. I wrote down false for this cause I thought it was only + 6, but the real answer is true, and I want to know that how can it be negative? Also for this: Convert the following radicals to mixed...
  19. Pre-calculus

    Determine whether the function f(x)[x+1] is odd, even, or neither. Answer: neither odd nor even 2)Find the least integral upper bound of the zeros of the function f(x)=x^3-x^2+1. Answer: upper bound, 1
  20. pre-calculus

    Determine whether the function f(x)[x+1] is odd, even, or neither. Answer: neither odd nor even 2)Find the least integral upper bound of the zeros of the function f(x)=x^3-x^2+1. Answer: upper bound, 1
  21. Geometry

    Hey! Thanks for checking my question out! ____ 1. R , S, and T are the vertices of one triangle. E, F, and D are the vertices of another triangle. m∠R = 60, m∠S = 80, m∠F = 60, m∠D = 40, RS = 4, and EF = 4. Are the two triangles congruent? If yes, explain and tell ...
  22. algebra

    Find the zeros of the function. f(x) = 2x^2-2x-1 Use the quadratic equation x= (2 +- sqrt (4+8))/4 x = 1/2 +- 1/2 sqrt 3 check that. the answer would be negative 96 I think respond back if not right
  23. History of health care

    Please check my answer thanks :) You belong to an HMO your are helping to control plan costs for everyone True or False I said True
  24. 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
  25. Health/ Basic Clinical Procedures

    please check my answer thanks true or false the carotid pulse is located on the anterior side of the neck I said true
  26. medical records

    please check my answer thanks you very much A medical should be completed within how many days after a pt is discharged A 30 B 35 C 60 D 15 E none of the above I picked D
  27. math check

    I have a problem that I need checked it is the produce of the reciprocals of two consecutive integes is 1/182 Find the integers. I have as the answer -13,-14 or 13,14 is this correct?
  28. Literature

    Please can you check my answer.. 13. According to Renaissance philosophy, commoners often represent A. reason. C. pride. B. love. D. appetite. I think it it... B. love. It that correct ?
  29. Math

    Write the slope-intercept form of an equation of the line that passes through the given point and is parallel to the graph of each equation. 1. (3,2), y=x + 5 2.(4,-6),y=-3/4x + 1 3.(-8,2),5x-4y=1 Could you guy check if these are the answer? 1.y=x-1 2.y=-3/4x -3 3.y=5/4x + 12 ...
  30. 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?
  31. algebra

    could you please check my answer and show me correct way . thanks for your help solve the equation if pssible -3|6n-2| +5 = 8 note:: 6n-2 is abolute value 6n-2 is positive -3|6n-2| + 5 = 8 |6n-2| = 6 6n - 2 = 6 6n - 2 +2 = 6 + 2 divide by 6 n = 8/6 6n-2 negative -3|6n-2|+ 5...
  32. chemistry/check please

    923.85 grams of gaseous ammonia condenses into liquid.How much energy was released? answer: 1268.28852 = 1268 kj
  33. math

    find the differential of dy of the given function. y=3x-4sec(2x-1) The answer i got was dy=(3-8sec(2x-1)tan(2x-1))dx I am not entirely certain i got this correct. if you could check this for me, it would be a big help. :)
  34. Math check

    Consider the following. (Give your answers correct to two decimal places.) (a) Determine the value of the confidence coefficient z(á/2) for 1 - á = 0.87. Incorrect: Your answer is incorrect. . 0.44
  35. Can someone please check my answer for chemistry

    Compelete the following table for an ideal gas. P= 7.74*10^3 Pa V= 10.3 mL N= ? T= 25°C I'm getting 3.20e-4, but my online homework says its wrong, what am I doing wrong?
  36. physics

    How can we increase the rate of change of magnetic flux? ( i want to check my answer)? Can it be : a) using a stronger magnet b) increasing the rate of movement of the conductor? are these correct?? both of them
  37. Math

    55 is 30% of what number? I think its 183? Can someone tell me if im wrong/explain to me how to do it? I dont really want the answer I just wanna check and see if im right/ why im not right Thanks ^-^
  38. business

    You have been retained to analyze how many check-in agents should be used at a check-in counter for a large hotel. During normal business hours, customers arrive at a rate of about 24 per hour, and it takes about 7 minutes to complete the check-in process. Both the poisson ...
  39. Calculus - Find volume of cylinder

    There is a cylindrical tank lying horizontally on the ground, its diameter is 8 feet, and length is 25 feet, the depth of the water currently in the tank is 2 feet. (1 gallon=231 cubic inches) How many gallons of water are in the tank? How many gallons of water will it take to...
  40. Math check 4

    Find the y-intercepts for the function given by: f(x)= 4/(x+5)-1/(x-4)/2/(x-3)+3/(x+2) Math check - Damon, Sunday, October 12, 2008 at 5:56pm The y axis intercepts are the values of the function when x = 0 4/5 - [(1/-4)] / [(2/-3)] + 3/2 Math check - shawn, Sunday, October 12...
  41. Math help please!!!

    1. Determine the equation of g (x) that results from translating the function f(x)=x^2+5 upward 8 units. A. g (x)= (x +13)^2 B. g (x)= ( x+8 )^2 +5 C. g (x)= x^2 -3 D. g (x)= x^2+13 I think (D.) is my answer please check over for me. 2. Determine the equation of g (x) that ...
  42. Calculus-check my answers please

    dy/dx= (y^2 -1)/x 1. Give the general equation of the curves that satisfy this equation. 2. Show that the straight lines y=1 and y=-1 are also solutions 3. Do any of the curves you found in 1) intersect y=1? My Ans: 1. The general solution i found out to be x^2 + C = (y-1)/(y+...
  43. calculus

    Consider a differentiable functionf having domain all positive real numbers, and for which it is known that f'(x)=(4-x)^-3 for x.0 a. find the x-coordinate of the critical point f. DEtermine whether the point is a relative maximum or minomum, or neither for the fxn f. justify ...
  44. Calculus

    Please look at my work below: Solve the initial-value problem. y'' + 4y' + 6y = 0 , y(0) = 2 , y'(0) = 4 r^2+4r+6=0, r=(16 +/- Sqrt(4^2-4(1)(6)))/2(1) r=(16 +/- Sqrt(-8)) r=8 +/- Sqrt(2)*i, alpha=8, Beta=Sqrt(2) y(0)=2, e^(8*0)*(c1*cos(0)+c2*sin(0))=c2=2 y'(0)=4, c2=4 y(x)=e^(...
  45. Language Arts

    Rewrite each sentence below correcting the double negative. 1. The shoppers looked for bargains at the store, but there weren't none. Answer: The shoppers looked for bargains at the store, but there were none. 2. She couldn't hardly say her own name. Answer: Do not have to ...
  46. 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!
  47. Pre Calculus

    Pre Calculus why is sin(-20)/cos 380 equal to tan (-200)
  48. Calculus

    for the function F(t)=ln(t^2), let f(t)=F'(t). Write the integral from a to b of f(t) dt and evaluate it with the fundamental theorem of calculus. the integral from 1 to 3 ___ dt= __
  49. Calculus - Fundamental thm of Calc

    Use the Fundamental Theorem of Calculus to find the derivative of f(x)=∫[4,x^2]((1/4)t^2−1)^15 dt
  50. Chemistry(Please check, thank you!!)

    For my rate of reaction experiment I have to answer the question "why did we ask you to measure the room termperature and temperature of reaction solutions". For the experiment we used 5 flasks and we put one of them in an ice bath at 6-10 degrees C. My answer is that we ...
  51. Science - Please Check

    I know I am posting this again, and I don't mean to be annoying, but nobody responded. Can someone please check my answer? If you swung a bucket of water quickly in an upside down circular path, the water would not fall out of the bucket. Which of the following best describes ...
  52. 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 answer: 9 yards of ...
  53. Can someone check my answer please

    Can someone check this for me? Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is graphed on a rectangular coordinate system where time is on the horizontal axis. Suppose that the number of cars driven on 1st Avenue can be ...
  54. PHYSICS (CHECK WORK)

    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 at a pressure of 101.3...
  55. precalculus

    Find the difference quotient by using f(x+h)−f(x)/h 1) f(x) = √(2x+1) answer (√(2x+1+2h) - √(2x+1))/h can you check please
  56. Poem: Young by Anne Sexton

    Could you check these answer thanks so much 1. How do you think the girl in "Young," feels about where she is in her life. Answer: The girl wonders what is coming next in her life because she is full of questions about what's her future going to be like. The girl was looking ...
  57. math - please check me

    Identify the amount in the following application In a shipment if 1200 parts, 60 were found to be detective. What percent of the parts were faulty? a. 60 b. 1200 c. what percent d. shipment answer: c Write the following in the standard form of a number. Two billion, nine ...
  58. Spainsh

    Check? Choose the correct option to complete the sentence Choose the correct option to complete the sentence 1. Marco y Ana ______________ en Acapulco por 3 semanas A. estuvo B. estuvieron C. estuvimos D. estuvisteis My answer: A Yo no _____________ comprar ropa muy cara en la...
  59. algebra check

    at 7a.m. the temperature was -15degree F by 1 p.m the temperature had increased by 18degrees F what was the temperature at 1 pm? -15+18=3 answer:3degree F Looks good to me.
  60. prealgebra/ check answer please

    What single discount is equivalent to two successive discounts of 15% and 7%? x= 100 [1-(.85)(.93)] = 100 (1-.79) =100 (.21) =21%
  61. math

    The function f(x)=2x+8/3x-7 is one to one. Find its inverse, and check your answer. f^-1(x)= I haven't one clue how to do this...help me pleaaaase someone!
  62. Math!!!

    Suppose Y ∼ N(μ=0, σ). Find σ so that the normal population contains 90% of its probability between -1 and 1. Please round your answer to two decimals.  . [Hint: The normal distribution is symmetric around 0, so you can simplify the problem and only ...
  63. Chemistry

    please check my answers. THANK YOU. 1) The percent by mass of carbon in acetone, C3H6O is. Answer: 62.1% 2) What is the percent by mass of zinc, Zn, in ZnCO3? Answer: 52.3% 3)What is the percentage of water in the compound BaCl2 * 2H2O? Answer: 7.96% 4)How many atoms are in ...
  64. French

    Could you please check these answers thanks so much. Directions: give own answers 1. Qu' est-ce que tu fais comme langues? Du français? De l'espagnol? Answer: Je fait du français. 2. Et tes copains, qu'est-ce qu'ils font comme langue(s)? Answer: Ils font de l'espagnol. 3. Qu...
  65. Statistics- Need someone to check

    Ok so i don't know how i got that answer i think i typed in a wrong formula or read something wrong. I got .8926 for the first one. And the second one i don't know what i am suppost to use from the first answer to get that. Can someone help me. It is known that about 20% of ...
  66. calculus

    The problem is to evaluate the integral 10secxtanx dx, from -1/7 pi to 3/8 pi. What I've done so far is evaluated the integral since secxtanx is a trig identity, so the integral of that is secx. I took out the 10 since it was a constant which leaves me with 10[sec(3/8)pi - sec...
  67. Calculus

    A box of fixed volume V has a square base with length x. Write a formula for the height, h, of the box in terms of x and V. Sketch a graph of h versus x. Is the answer h=V/x^2
  68. Pre-calculus

    A set of data is normally distributed with a mean of 500 and a standard deviation of 40. What percent of the data is between 460 and 540? Answer: 68.3%
  69. Calculus I

    Hi, I'm trying to figure this out, but the answer I keep coming up with is incorrect. Can anyone help me out? Thanks. Problem: y=2(6-x^2)^5 I know I'm supposed to use the chain rule, but I'm getting confused.
  70. Calculus

    I don't understand how to answer this problem: The base of a solid is bounded by y=x+1 and y= x^2-1. Find the volume of the solid if the cross section is perpendicular to the x axis are equilateral triangles.
  71. calculus

    How many critical points does the function: (x+2)^5 * (x-3)^4 have? How would I solve this quickly? The answer says something about an effect of multiplicity of the zeros of the function?
  72. calculus

    Evaluate integral of e^x^(1/2) / x^(1/2) I've looked at the answer but I don't understand what people do in their steps. When I substitute x^(1/2) for u, I get: 2du = 1/x^(1/2) dx But what do you do with the 1/x^(1/2) dx? It just disappears in the solutions I've seen people give.
  73. 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
  74. Calculus - Series2

    Find the sum of each of the convergent series: b) 5 - 1/3 + 20/9 - 40/27 + 80/81 ..... so first we need to find the general term, and I'm not sure of my answer, but I got: ((-1)^2 * 2!)/3^n and a0 = 5 From here on I'm lost.
  75. 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)
  76. calculus

    f(x)=sqrt(x-2) what is the inverse of f? I got inverse f(x)= x^2+2 however, you need to specify the domain of x. the answer key says when x=>0 can you please explain why? I thought it would be when x=>2 ?
  77. Calculus Can you help

    Suppose the functions f and g and their derivatives have the following values at x = 1 and x = 2. Let h(x) = f(g(x)). Evaluate h′(1). X | f(x) G(x) f'(x) g'(x) ____________________________ 1 | 8 2 1/3 -3 2 | 3 -4 2π 5 My answer: -6π but I'm not really sure if I...
  78. Pre-Calculus

    x = 2/7 is a root of 49x^3 - 126x^2 + 60x - 8 = 0. Factor the polynomial completely and list all real solutions. My answer: (x - 2)(7x - 2)^2 = 0 factored, and the solutions are x = 2 and x = 2/7.
  79. 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
  80. 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.
  81. English

    Can anyone check my essay? I could send the rubric for scoring. Thanks You have to include the essay itself, so we can check it. Respond to this post with the essay. Thanks for asking. Whats your question..?
  82. 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 sides d for depth. a) ...
  83. English

    I need to check my answers. The assignment was to write the appositives and appositive phrases in the following sentences, along with the words they rename or identify. 1. Wilma Rudolph, another champion sprinter, also overcame a disability. *ANSWER* AP=another champion ...
  84. Calculus (Normal Line, please check my work)

    The slope of the line normal to the graph of 4 sin x + 9 cos y = 9 at the point (pi, 0) is: Derivative: 4cosx - 9siny(dy/dx) = 0 (dy/dx) = (-4cosx) / (-9siny) (dy/dx) = (4) / 0 Normal line = -1 / (4/0) Does this mean that the slope of the normal line is undefined, or did I do ...
  85. Calculus

    Determine the measure of A if 0 degrees is less or equal to angle A and if angle A is less or equal to 360 degrees. Tan A = 0 Answer is somehow supposed to be 0 degrees, 180 degrees, and 360 degrees, but don't know how to get the answer, just really confused. Sin A = -1
  86. dog behavior

    please check my answer thanks What is one social characteristic that both wolves and humans share which may have helped the process of domestication ? I think it i thr formatio of extended families
  87. Applied Dog Behavior

    please check my answer thanks The best way to test a puppy for temperament is to A. chase it. B. ignore it. C. observe its general level of activity and excitability. D. shout and see what it does. I pickecd C
  88. Teaching dogs Tricks

    Please check my answer thanks Mimicking should be used only for behaviors that A. can't be elicited any other way. B. the dog can't perform well. C. are very involved. D. are difficult to lure I say A
  89. child care mangement

    children create _ when they talk about certain kinds of information many times. a. cultural schemes b. socialization strategies c. motivations d. attitudes I think its b please check my answer
  90. 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?
  91. science(check answers)

    i don't think the answer could be A. so i pick B. One reason people around the world use coal as an energy source is: A. It is nonrenewable. B. it can be found many places C. it is a fossil fuel D. it cannot be used up
  92. 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
  93. HISTORY

    11. The Spanish monarch Charles III established Venezuela, Colombia, and Ecuador under the viceroyalty of A. Bogotá. B. Rio de la Plata. C. Peru. D. New Granada. I chose C please can you check my answer
  94. math help

    What is the smallest number i must multiply 315 in order to make it a perfect cube? Please tell me the method you sed and how you got the answer. I've been doing guess and check and it is time consuming.
  95. Physical Science

    Hello! Thanks for checking my question out! ____ 2. Milk is an example of a (1 point) a) solution. b) homogenous mixture. c) colloid. d) compound. My Answer: C Could someone please check if I'm right? Thanks! - Da Fash
  96. 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
  97. science (check new answer)

    please check my answser .A car driver accelerates to a speed of 35 mph and then takes her foot of the gas pedal.Even though she does not press the brake pedal at any time,she eventually rolls to a stop.which of the following most likely causes the car to come to a stop? A....
  98. alGEBRA 2 help please would appreciate

    x over (x+3) -x over(x-3)=x^2+9 over X^2-9 solve for x and check answer
  99. Calculus

    I have trouble finding the second derivative, my answer is a little off from the answer key. f(x)=(log(base2)x)^5 f'(x)=[5(log(base2)x)^4]/xln2 f"(x)=[20(log(base2)x)³(xln2)-(ln2+(x/2))(5(log(base2)x)^4)]/[x²(ln2)²] for the f"(x), is g(x)=xln2? It is a product so I think it...
  100. 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? Do I just get the ...
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