Pre- Calculus

21,894 results, page 92

    Determine the name of the following triangle using the given points: A(5,6), B(-1,-2) and C(-3,2). Be as specific as possible. I used the distance formula and found that AB had a side of 10 BC had a side of 2 sqrt 5 CA had a side of 4 Sqrt 5 I found that
  2. Pre-Cal(Please help)

    1) Write the first five temrs of the geometric sequence a1 = 2 r=sqrt3 I know the first term is 2 but the sqrt 3 threw me off so I do not know how to find the next numbers. 2) Find the nth term of the geometric sequence. a2 = 3 a5 = 3/64 n=1 I know the
  3. Pre-Calc

    After release at ground level, a balloon rises 100 feet in 30 seconds. During each succeeding 30 seconds, it rises 9/10 as far as it did in the preceding 30 seconds. What is its maximum altitude above ground level?
  4. Pre-cal

    What is the probability of getting an even number on a single roll of a number cube if you roll a 3 or greater. My answer: is 1/3 because there are only two numbers that are even and greater than 3 on the number cube. Teacher marked this as wrong. How did
  5. Math

    A craft store needs 5,126 yards of special order ribbon and 2,654 yards of a velvet ribbon. The ribbons come pre-packaged on rolls of 30 yards each. How many rolls will be in the order?
  6. Pre-Algebra

    A 5-foot parking meter has a 4-foot shadow from a nearby streetlight. The streetlight is 15 feet tall. How far is the streetlight from the parking meter? Don't want answer, just want formula for figuring out
  7. 4th grade math

    Juanita has 35 pre-addressed post cards she plans to hand out to her friends so they will write to her while she is away visiting her grandmother. She has 7 friends she'd like to give them to. Write a number sentence to show how Juanita can share her cards
  8. pre algebra

    Two bank robbers flee at 60 mph. 26 minutes later, a police helicopter follows at 120mph. How long til they catch them? I figured 39 minutes. I takes the police 13 minutes to get to the 26 mile mark. Then the robbers move 13 miles forward. then the police
  9. Pre-Calc

    Can anyone direct me to learn more about polar coordinates. I'm in online college course and really am confused. In high school, I never heard of polar coordinates. Like they say is the following the graph of point (3,15) and show it on polar grid-I don't
  10. pre-cal

    Find the EXACT VALUE of csc(-11pi/12) If that angle is in radians, it is easy. A full circle has 2PI radians...or 360 deg so 22PI/24 is the same as 22*15 deg, or -30 deg. The 30 deg triangle is well known. The sin is 1/2, so the csc is 2 Figure out the
  11. pre algebra

    f(x)=9x+7 The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined. help why is the answer negative infinity, infinity? thank you so much...please
  12. Pre-calc

    A car is moving at the rate of 60 miles per hour, and the diameter of its wheels is 2.5 feet (1 mile=5280 feet) a) Find the angular speed of the wheels in radians per minute b) Find the number of revolutions per minute the wheels are rotating.
  13. Pre-Algebra

    Write a number sentence for the product shown on the number line ___________________ -10 -8 -6 -4 -2 0 2 The answer i came up with is 10 Because 5 times -2 equals ten. Please and thank-you I'm not sure what's meant by a 'number sentence' here Bowier4.
  14. Calculus

    I need some help on getting ideas for my limits & continuity calculus project! For the limits project: I have to conduct an "interview with a limit" (Q&A format).I have to include factual information like definitions, properties, theorems, etc. I also have
  15. Pre-Algebra

    Three individuals form a partnership and agree to divide the profits equally. X invests $9,000, Y invests $7,000, Z invests $4,000. If the profits are $4,800, how much less does x receive compared to having the profits divided in proportion to the amounts
  16. Stat 1

    In 1992, the FAA conducted 86,991 pre-employment drug tests on job applicants who were to be engaged in safety and security-related jobs, and found that 1,143 were positive. (a) Construct a 95 percent confidence interval for the population proportion of
  17. Pre- Algebra

    Theo made the table below to show the number of middle school students who attended the last football game. If the data were displayed in a circle graph, how many degrees would be in the sector representing the eighth graders? Grades:6,7,8 Number of
  18. Pre-calc Math

    The path of a satellite orbiting the earth causes the satellite to pass directly over two tracking stations A and B, which are 95 mi apart. When the satellite is on one side of the two stations, the angles of elevation at A and B are measured to be 87.0°
  19. Pre-Calc College

    Two 5-grain aspirin tablets contain 650 mg of the drug. With aspirins half-life of 29 minutes, how much is left in the bloodstream after 2 hours? How long does it take for the level to be equivalent to 10 mg of aspirin? If an individual takes two tablets
  20. Pre Algebra

    Complete the table (Was in a table form!) Scientific Notion /// Standard Notion 1. ________________ = 62,000,000 2. -3.05*10^6 = ___________ 3. ________________ = .00000089 Simplify 4. (9.8*10^2) * (5*9*10^7) 5. (7.2*10^-5) / (4.3*10-3) My Answers:- 1.
  21. Pre calc

    Write the equation in standard ellipse form and graph. 34 x^2 -24xy +41y^2 +41 y^2 -25= 0. i got x= (4 x prime- 3 y prime)/5 and y=(3x prime +4y prime)/5 but cant get the correct math when I plug that into the original equation. Also I need help finding
  22. Pre-Algebra

    The treasurer of the student body at a college reported that the receipts from a recent contact totaled $916; Furthermore, he announced that 560 people had attended the concert. Students were charged $1.25 each for admission to the concert, and adults were
  23. Pre calc

    A small plane takes off from island A and flies in a straight line for 12 kilometers. At the same time, a sailor sitting in a sailboat who is 5 miles from the island measures the angled by from island A to the sailboat and the plane is 37 degrees. How far
  24. pre algebra answer check

    You are standing 400 feet from the base of the Space Needle in Seattle, Washington. Using a laser range finder, you measure the distance to the top of the Space Needle to be 725 feet. Find the height of the Space Needle to the nearest foot. I got 629 ft.
  25. pre-calc

    A ball is dropped from the top of a 25-m ladder. In each bounce, the ball reaches a vertical height that is 3/5 the previous vertical height.Determine the total vertical distance traveled by the ball when it contacts the ground for the sixth time. Express
  26. AP calculus

    Find values for x and/or y on the graph of x^2-2y^2+9x+8y-276=0 for which there is a vertical tangent line
  27. Calculus

    I have to use integration by parts to integrate tan^-1 (1/x)dx. I'm not sure what to use as u or dv. We were taught to use uv-integral of (vdu) to do this.
  28. Elections

    Calculus / Graphical, Numerical, Algebraic: Teacher's Guide with Answers
  29. calculus

    how to find surface area of a cylinder with respect to r(radius) and h(height)?
  30. CALCULUS 3

    Use the triple scalar product to determine whether the given points lie in the same plane. A(1, 2, 3), B(3, -4, 8), C(7, -1, 1), D(5, 5, -4)
  31. Calculus

    find the equation of both the tangent lines to the ellipse x^2+9y^2=81 that pass through the point (27,3)
  32. calculus

    Given the function y = 2 - x - x^3 Use limits to find the slope (and then the equation) of the tangent line at x = 2
  33. calculus

    Let g(x)=|cos x-1|. The maximum value attained by g on the closed interval [0, 2pi] is for x equal to A) -1 B) 0 C) pi/2 D) 2 E) pi I think its pi/2 but I'm not sure at all.
  34. Calculus

    Find dy/dt where y = 2 sqrt(2)− 4 and dx/dt = 9 when x = 4. I found the derivative of y=2sqrt(2)-4 but I am stuck as to where to plug in dx/dt
  35. Calculus

    Find the area of the region enclosed by y−2x^2 ≥ 0 and |x|+|y| ≤ 1
  36. Calculus:)

    Find the area of the region enclosed by y−2x^2≥0 and |x|+|y| ≤ 1
  37. Calculus

    What are the dimensions of a rectangular field of area A that requires the least amount of fencing?
  38. Calculus:)

    Find the area of the region enclosed by y−2x^2≥0 and |x|+|y| ≤ 1
  39. Calculus

    Find the equation of the line tangent to F(x) = xe^-x at the point where x = 0. What does this tell you about the behavior of the graph when x = 0?
  40. Calculus

    Find the particular solution that satisfies the intial condition: xdy - (2xe^(-y/x)+y)dx = 0
  41. calculus

    Evaluate the integral. (Remember to use absolute values where appropriate. Use C for the constant of integration.) (x^2−x+12)/(x^3+3x) dx
  42. Calculus

    "Using Lagrange multipliers, find the minimum value of f(x,y) = x^2 + y subject to the constraint x^2 - y^2 = 1." Any help would be appreciated!
  43. calculus

    Given the function: y = 2 - x - x^3 use limits to find the slope (and then the equation) of the tangent line at x =2.
  44. AP Calculus

    Locate the absolute extrema of the function f(x)=2x^2-12x+4 on the closed interval [-6,6].
  45. Calculus

    A cost function is given by: A'(x)= 2x^2/x^2-211/x^2. For what values is A(x) increasing and decreasing? Any help would be appreciated
  46. calculus

    Plot the points and determine the slope of the line containing them (-7,-4);(8,-4) please show work
  47. Calculus

    The velocity v(t)= -t^2 + 6t - 8, find the displacement and distance traveled during the time interval [-1,5]?
  48. calculus

    Find a point c satisfying the conclusion of the Mean Value Theorem for the function f(x)= x^1/3 on the interval [1,8] I got f'(c)= 1/7 but am not sure where to go from there.
  49. Calculus

    find the exact value of sin 11pi/12 using the sum or difference formula.
  50. calculus

    Find the center of mass in the 1st quadrant of the circle x^2+y^2=4 where rho(x,y)=k(x^2+y^2) Thanks.
  51. Calculus

    use the mean value theorem to find the c's on the open interval (a,b) such that fprime(c)= (f(b)-f(a))/(b-a) f(x)= 3xlog(base 2)x , [1,2]
  52. calculus

    find the area of one of the regions bounded by the curves y=sin x and y=cos x
  53. calculus

    y' = 2y(1/2) , y(0) = 8 The function starts with y0 = 4 ,what is Euler’s method for computing yk+1 from yk with step size ∆t.
  54. Calculus

    Determine the coordinates of the point(s) on the graph of y=3x- 1/x at which the slope of the tangent is 7. So the derivative of y=3x- 1/x is y'=3 + 1/x^2 What do I do next?
  55. 12th grade calculus

    find the derivative of y with respect to the appropriate variable y=sec^-1*5s
  56. Calculus

    Integral of x sq/(1+x sq) dx I am not sure how to do this, am i supposed to do partial fractions to break it up? Or is it just some simple substitution?
  57. Calculus

    The region bounded by y= e^x, y=0, x= -1 and x=1 is rotated about the x-axis, find the volume generated.
  58. calculus

    Find the volume if the area between the curve y=lnx, x=1, and y=1 is rotated about the x-axis.
  59. Calculus

    The region bounded by y= e^x, y=0, x= -1 and x=1 is rotated about the x-axis, find the volume generated.
  60. Calculus

    find the extreme values of the function and where they occur y=1/(sqrt 1-x^2). So far I have y'=x/((1-x^2)(1-x^2)^(1/2)) but I am stuck.
  61. calculus

    determine the seating capacity of an auditorium with 46 rows if there are 18 seats in the first row, 21 in the second, and 24 in the third and so on
  62. Calculus

    Find the concavity and min and max for f(x) = x*sqrt(x^2+36) defined on the interval [-4, 7]?
  63. calculus

    Let f (x) = 5 - x/2. What is the value of the Riemann sum R(f ,0,8), obtained by using four rectangles and left-hand endpoints?
  64. Calculus (pleas help!)

    For what values of k is lim x -> INF coshkx/sin2x finite?
  65. Calculus I

    Using Newton's Method, determine the first approximation to the solution of: e^(4x)= 10-2x starting with x=0 what is x1= ??? P.S. ( the 1 is a subscript )
  66. Calculus

    find the 6th degree Taylor polynomial for f(x)=cosx centered at pi/2
  67. calculus

    Let \lambda be a positive real number. Evaluate \sin^{-1}(\lambdai)
  68. Calculus

    Decide whether to integrate with respect to x or y. Find the area of the region. y=e^2x y=e^6x x=1 I have no idea what to do
  69. Calculus

    Solve the differential equation, we're using u substitution: dy/dx= 4x + (4x/ sqr root (16-x^2)) Thanks. Please respond!
  70. Calculus

    Find the average value of the function on the given interval: f(x)=cos(16x), [0,pi/2] The answer I got is 1.
  71. calculus

    the area of a rectangle is A=lw. Further suppose l=2w. calculate dA in terms of the differential dw. does this just mean to get the derivative of 2w^2
  72. Calculus

    Given: 5cos6Θ What is the shape of the function? A. Limacon B. Rose C. Lemniscate D. Circle
  73. Calculus 1

    Find the formula for a function of the form y=bxe^(-ax) with a local maximum at (4,12)...
  74. Calculus: Implicit Derivatives

    Compute d/dx[f(g(x))] -where f(x)=x^4-x^2 -and g(x)=x^2-7 (Note: I tried 5 times but I still got this wrong. Plz help)
  75. Calculus

    Estimate the area under the graph of f(x)= x^2 + 2 x from x=1 to x=5 using 4 approximating rectangles and left endpoints.
  76. Calculus

    Find the volume of the solid generated by rotating the region 0<y<5-x^2 about the x-axis
  77. Calculus

    Assume v(t) = 6t - 18 on the interval [0, 6]. Find the total distance that the object traveled on [0, 6].
  78. calculus

    is the answer to find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3 is y=2x^2-1
  79. Calculus

    "Using Lagrange multipliers, find the maximum value of f(x,y) = x + 3y + 5z subject to the constraint x^2 + y^2 + z^2 = 1." Any help would be appreciated!
  80. Calculus

    Given f(x) = cubed root of x^2 (2x+5)^3, find the critical numbers after you identify the domain.
  81. calculus

    Find an equation of the tangent line to the curve at the given point y = x + cosx, (0,1)
  82. calculus

    for the function f(x)=5/x+4, find the average rate of change of f from 1 to x. please show work
  83. Calculus

    Find a forula for the following function. A line with slope 5 and x-intercept 10 is the answer y(x)= 5x-50
  84. Calculus

    What is the connection between improper integrals, Riemann sums, and the integral test?
  85. Calculus

    Find all the points (x,y) on the graph of f(x)=9x^2-36x+35 where the slope of the tangent line is zero.
  86. Calculus

    y = g(x) = cos(x) Can someone show how to estimate g'(pi/2) using the limit definition of the derivative and different values of h. Thanks!
  87. Calculus

    Which of the following functions grows the slowest as x goes to infinity? x^e e^x ex they all grow the same rate. I think it is c because it does not have any exponents.
  88. calculus

    find the equation of line L. L is parellel to y=4x show work pleaase..
  89. Calculus

    Find the limit as x approaches 1 5/(x-1)^2 I don't understand how to solve it because there would be a 0 on the denominator.
  90. Calculus

    Could really use a lot of help here what is the slope of the tangent line to cos(x-y)=xe^x at point (0,3pi/2)
  91. Calculus

    Find the equation of the line tangent to f(x) = xe^-x at the point where x = 0. What does this tell you about the behavior of the graph when x = 0?
  92. calculus

    Given: theta is in standard position in quadrant 1 with p(x,y)=(5,12) find sin 2 and cos 2
  93. AP Calculus

    how do you evaluate integral of [lxl] from (0,2) , a step function. would you just do it as if it were a absolute value and then do two different integrals?
  94. Calculus

    Write the Riemann sum to find the area under the graph of the function f(x) = x4 from x = 5 to x = 7.
  95. Calculus

    Determine the area of the region enclosed by the limaçon r=5+2sin(theta)
  96. Further maths

    But i need a more detail explanation find the derivative function of the differential calculus (2x+3)^3(4x^2-1)^2
  97. calculus

    Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.
  98. Calculus

    limit as x approaches infinity. (sin2x)/(x) answer is 0. show me how please. thanks in advance =)
  99. calculus

    Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.
  100. Calculus

    Find the derivative of f. you may simplify before differentiating f(x)= x2-7x+12/x4-8x3+13x2+30x-72