Posts by Ke$ha

Total # Posts: 82

  1. Calculus

    (-1,-1), (0,0) and (1,1). The four midpoints are -3/4, -1/4, +1/4, and +3/4. Each vertical strip has a width of 1/2. The lengths of the 4 strips are: -27/64-(-3/4); -1/64-(-1/4); 1/4 - 1/64; and 3/4-27/64; simplifying these, you get 21/64, 15/64, 15/64, and 21/64. So the area ...
  2. Calculus

    For the first one i think the integral is from -1 to 1 for the two functions, because they intersect at (-1,1) (0,0) and (1,-1)
  3. Calculus

    Use the midpoint rule with n=4 to approximate the region bounded by y=-x^3 and y=-x Show that the function f(x)= (integral from 2x to 5x) (1)/(t) dt is constant on the interval (0,+infinity)
  4. One more question Calculus

    Thank you!
  5. One more question Calculus

    write n with limit from 0 to infinity with the summation n on top and k=1 on the bottom (5+k(2/n))^10 (2/n) as a definite integral.
  6. Please help Calculus

    Thank you!
  7. Please help Calculus

    Write the integral in one variable to find the volume of the solid obtained by rotating the first?quadrant region bounded by y = 0.5x2 and y = x about the line x = 5.
  8. Calculus Please Help

    Thank you!
  9. Calculus Please Help

    find the area bounded by the curves y^2=2x+6 and x=y+1
  10. Calculus Please Check my answer

    yes! thank you!
  11. Calculus Please Check my answer

    find d/dx (integral from 2 to x^4) tan(x^2) dx tan(x^4)^2*4x^3 MY ANSWER
  12. One more question Calculus

    So the total would be 1353.333 feet?
  13. One more question Calculus

    A car travels along a straight road for 30 seconds starting at time t = 0. Its acceleration in ft/sec2 is given by the linear graph below for the time interval [0, 30]. At t = 0, the velocity of the car is 0 and its position is 10. What is the total distance the car travels in...
  14. Calculus Please Check my answer

    so we would get 9.05584?
  15. Calculus Please Check my answer

    I am confused on how to do this. Will you please help?
  16. Calculus Please Check my answer

    Ok, so exactly how would I find the amount of water? I am confused now.
  17. Calculus Please Check my answer

    Water is poured into a bucket according to the rate F(t)=(t+7)/(2+t), and at the same time empties out through a hole in the bottom at the rate E(t)=(ln(t+4))/(t+2), with both F(t) and E(t) measured in pints per minute. How much water, to the nearest pint is in the bucket at ...
  18. Calculus really quick check

    Thank you!!
  19. Calculus really quick check

    The graph of f ?(x) is continuous and decreasing with an x-intercept at x = 2. Which of the following statements must be true? Edit The graph of f has an inflection point at x = 2. The graph of f has a relative maximum at x = 2. The graph of f is always concave down. MY ANSWER...
  20. Calculus Please Check my answer

    the velocity of a particle moving along the x axis is v(t)=t^2+2t+1, with t measured in minutes and v(t) measured in feet per minute to the nearest foot find the total distance traveled by the particle from t=0 to t=2 minutes so, I took the integral of the equation so from 0 ...
  21. Calculus Please Check my answers

    Well that was my issue with the second one is I originally got that answer but it isn't an option.
  22. Calculus Please Check my answers

    Use the graph of f(t) = 2t +2 on the interval [?1, 4] to write the function F(x), where f(x)= integral from 1 to x f(t) dt f(x)=x^2+3x f(x)=x^2+2x-12 My Answer f(x)x^2+2x-3 f(x)=x^2+4x-8 Find the range of the function f(x)=integral from 0 to x (sqrt 4-t^2) dt (0, 4pi) (0, 2pi...
  23. Calculus Please Check my answers

    Thank you!
  24. Calculus Please Check my answers

    f is a function that is differentiable for all reals. The value of f ?(x) is given for several values of x in the table below. The table: x -8,-3,0,3,8 f'(x)-4,-2,0,4,5 If f ?(x) is always increasing, which statement about f(x) must be true? f(x) passes through the origin ...
  25. Calculus Please Check my answers

    Thank you!
  26. Calculus Please Check my answers

    Which of the following functions grows the fastest as x grows without bound? f(x)=x^2 g(x)=x^2+5x <<<<MY ANSWER h(x)=(sqrt x^4+2x) They all grow at the same rate Compare the growth rate of the functions f(x)=4^x and g(x)=(sqrt 16^x+2^x) f(x) grows faster than g(x) ...
  27. Calculus Please Check my answer

    The rate at which water flows into a tank, in gallons per hour, is given by a differentiable function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t---------0-----2------3-------7----8 (hours) R(t)--1.95---2.5---2.8----4.00...
  28. Calculus

    f is a continuous function with a domain [?3, 9] such that f of x equals 3 for x between negative 3 and 0 including negative 3, equals negative 1 times x plus 3 for x between 0 and 6 inclusive, and equals negative 3 for x greater than 6 and less than or equal to 9 and let g of...
  29. Calculus I'm really confused

    Thank you!
  30. Calculus I'm really confused

    solve the differential equation dy/dx=y^2/x^3 for y=f(x) with condition y(1)=1.
  31. Calculus

    Determine if the Mean Value Theorem for Integrals applies to the function f(x) = x^3 - 9x on the interval [-1, 1]. If so, find the x-coordinates of the point(s) guaranteed to exist by the theorem. I think one point is zero.
  32. Calculus

    Oh thank you!!!
  33. Calculus

    for the second integral i got (sqrt 3)/60 how did you get (sqrt 3)/120?
  34. Calculus

    The base of a solid in the xy-plane is the first-quadrant region bounded y = x and y = x^2. Cross sections of the solid perpendicular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid? So I got 1/30 because (integral from 0 to 1) (x-x^2...
  35. Calculus

    I know it is pi (integral from zero to 1)then I get confused
  36. Calculus

    Which of the following integrals will find the volume of the solid that is formed when the region bounded by the graphs of y = ex, x = 1, and y = 1 is revolved around the line y = -2
  37. Calculus

    For an object whose velocity in ft/sec is given by v(t) = ?2t^2 + 4, what is its distance travelled, in feet, on the interval t = 0 to t = 2 secs? I think the answer is 2.667 but I am not one hundred percent sure.
  38. Calculus

    So the answer would be 1.0947?
  39. Calculus

    find the area of the region bounded by the graphs of y=x^2 and y=cos(x)
  40. Calculus

    Thank you!!!!
  41. Calculus

    find the volume of the solid formed by revolving the region bounded by the graphs of y=x^3 y=1 x=2 about the y-axis
  42. Math Calc

    So my updated answer would be that the possible error is the volume of the cylinder is 63.87 in^3?
  43. Math Calc

    r = 4 in. h = 12 in. V = pi*r^2 * h = 3.14*4^2 * 12 = 602.88 m^3. r = 4.2 in. h = 12.2 in. V = 3.14*4.2^2 * 12.2 = 675.75 in^3 675.75-602.88 =72.87 in^3? is that right?
  44. Math Calc

    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.
  45. Calculus

    oh ok thank you!!!! sorry
  46. Calculus

    wait its 3 right?
  47. Calculus

    Yes I read it I still don't get it and 0 isn't an answer choice.
  48. Calculus

    so the answer is none?
  49. Calculus

    what is the difference between the two?
  50. Calculus

    ok THANK YOU!!!!!!!
  51. Calculus

    Thank you!!! :)
  52. Calculus

    Let h = height of water Let r = radius of surface of water By similar triangles, r/h = 6/12 = 0.5, so r = 0.5h The volume of the water is: v = (1/3) * pi * r^2 * h v = (1/3) * pi * (0.5h)^2 * h v = (1/12) * pi * h^3 dv/dh = 0.25*pi*h^2 The question tells us that dv/dt = -3 By ...
  53. Calculus

    Water is drained out of tank, shaped as an inverted right circular cone that has a radius of 6cm and a height of 12cm, at the rate of 3 cm3/min. At what rate is the depth of the water changing at the instant when the water in the tank is 9 cm deep? Give an exact answer showing...
  54. Math Calc

    Find the x-coordinates of any relative extrema and inflection point(s) for the function f(x) = 3x(1/3) + 6x(4/3). You must justify your answer using an analysis of f '(x) and f "(x) I got -1/8 for a minimum point and 1/4 for inflection is this right? Do I need a y value?
  55. Math Calc

    Which of the following statements is/are true 1. If f'(c)=0 then f has a local maximum of minimum at x=c 2. If f is continuous on [a,b] and differentiable on (a,b) and f'(x)=0 on (a,b) then f is constant on [a,b] 3.The Mean Value theorem can be applied to f(x)=1/x^2 on...
  56. Math Calc

    *cant
  57. Math Calc

    Given f'(x)=(x-4)(6-2x) find the x-coordinate for the relative minimum of the graph f(x). OPTIONS: 8 6 3 None of these I think it is 3, but I am also conflicted to say none of these because I graphed the function and ant see a minimum.
  58. Math Calc

    given the relationship 2x^2 + y^3 =10, with y > 0 and dy/dt = 3 units/min., find the value of dx/dt at the instant x = 1 unit. SUPER CONFUSED DONT GET THE EQUATION!!!!!!!
  59. Math

    A particle is moving along the x-axis so that its position at t>=0 is given by s(t)=(t)ln(5t). Find the acceleration of the particle when the velocity is first zero.
  60. Math

    I got -1
  61. Math

    A particle moves along the x-axis so that at any time t, measured in seconds, its position is given by s(t) = 4sin(t) - cos(2t), measured in feet. What is the acceleration of the particle at time t = 0 seconds?
  62. Math

    The table below shows the temperature (in °F) t hours after midnight in Phoenix on March 15. The table shows values of this function recorded every two hours. Estimate the value of T?(10). Give units in your answer. What is the meaning of T?(10)? t 0 2 4 6 8 10 12 14 T 73 ...
  63. Math

    Thank you!!!!!!!
  64. Math

    Help!!! determine the slope of the graph x^2=ln(xy) at point (1,e)
  65. Math

    thank you!!!
  66. Math

    f(x)=3,1,6 f'(x)=2,5,7 Just in case u cant read the chart
  67. Math

    HELP DERIVATIVES!!!!!!!!!!!!! if h(x)=f[f(x)] use the tables for f and f' to find the value of h'(1) X f(x) f'(x) 1 3 2 2 1 5 3 6 7
  68. Math

    THANK YOU!!!!!!!!!!!
  69. Math

    I have no clue how to do this problem: lim---->2 then thees this little dash slightly above the 2 and then its |x-2|/(x-2)
  70. Math

    FIND THE LIMIT!!! lim x--->3 sqrt(2x+3)- sqrt (3x)/(x^2-3x) I keep getting zero is this right?
  71. Algebra 2

    is this right???
  72. Algebra 2

    Describe an infinite geometric series with a beginning value of 2 that converges to 10. What are the first four terms of the sequence? a{1} = first term of series                ∞...
  73. Algebra 2

    105+15n 285 month 27 these are my other answers
  74. Algebra 2

    The deposits Ginny makes at her bank each month form an arithmetic sequence. The deposit for month 3 is $150, and the deposit for month 5 is $180. Answer these questions 1.what is common differences for each month? $15 2.write explicit formula for arithmetic sequence 3.amount ...
  75. Algebra 2

    Thank you!
  76. Algebra 2

    Will someone please check if I am right???? find the second and third term of the arithmetic sequence -7, __,__,-22,-27... Options: -12,-15*** My Answer -17,-12 -10,-17 -12,-17
  77. English 9 - HELP!

    What were the answers??????
  78. quick english help

    Thanks!:)
  79. quick english help

    wait, wouldn't it be c because the verb needed ends in ed?
  80. quick english help

    in which sentence is the underlined infinitive or infinitive phrase function as a direct object? c. After all that exercise, the runners needed *to drink water*. d.Just as the mayor was about *to give an award*, it began raining. I would say its d?
  81. Math PLEASE HELP PLEASE PLEASE PLEASE

    You posted an entire test on here and expect people to do it for you?! Do your own tests!!!!!!!!!!!
  82. chem-help

    hot pants