Pre- Calculus

21,892 results, page 46
  1. pre calc

    a kite currently flying at an altitude of 16 meters above the ground. If the angle of elevation from the ground to the kite is 30 degrees, find the length of the kite string to the nearest meter.
  2. Pre-Algebra

    Write a rule for this pattern.Fing the next three numbers in the pattern. 1,4,10,22,46,94 the answer that i came up with was that the pattern start with one add 3 and it goes by 3's or 6's. Please and Thank- you Can you see that each term after 1 is the
  3. pre cal

    A boat has passed directly over a submarine as pictured below. The sub is running at a depth of 588 ft, and the angle of depression from the boat to the sub is 35 degrees. Find the distance, x, from the boat to the submarine.
  4. Pre algebra

    A store was offering 30 % off everything in the bike store . A boy bought a bike for $91 dollars. How much was the original price of the bike? please explain each step. We are studying proportions and percents. thanks
  5. Pre algebra

    Electrical poles that carry electrical wire seem to get smaller the farther away they are. Find the apparent height of each pole if the tallest pole is 50 ft tall and there is 100 ft between each pole.
  6. PRe calc story problem!!

    A radioactive element decays exponentially according to the function Q(t) = Q0ekt .If 100 mg of the element decays to 25 mg in 12 days, find the half-life of the element.
  7. Criminal Justice

    Create a checklist that may be provided to the officers involved in the operation so they may have a reference reminding them of what they must do to properly process a defendant in a federal investigation. The checklist should include processing
  8. calculus help

    Produce graphs of f that reveal all the important aspects of the curve. Then use calculus to find the intervals of increase and decrease and the intervals of concavity. f(x)= 1+(1/x)+(5/x^2)+(1/x^3) find the interval of increase. find the interval of
  9. Pre-Algebra

    A ball is thrown straight up at 46 feet per second from about 6 feet above the ground. How long will it take for the ball to reach a height of 39 feet?
  10. pre algebra

    Tell whether the events are independent or dependent. Then find the probability. You roll a 6 on a number cube. Then you roll again and roll a 2. Independent???
  11. Pre Algebra

    The ratio of the length of a rectangular field to its width is 10:7 if the width of the field is 70 meters find the perimeter of the field.
  12. pre cal

    Suppose you inscribe a square in a circle of radius r. Thus all four corners of the square lie on the circle. The area of that square is ?
  13. Pre-algebra HELP ME PLEASE

    A triangle has side lengths of (x+4), (4x-8), and (2x+8) units. If the perimeter of the triangle is at least 88units, what is the minimum length of each side of the triangle?
  14. Pre-calc Math

    Use the Law of Sines to solve for all possible triangles that satisfy the given conditions. (If an answer does not exist, enter DNE. Round your answers to one decimal place. Below, enter your answers so that ∠B1 is smaller than ∠B2.) a = 78, b = 109,
  15. Pre-Calc

    The concentration C of a chemical in the bloodstream t hours after injection into muscle tissue is C=3t^2+t/ t^3+50 A. Determine the horizontal asymptote of the function and interpret its meaning in the context of the problem. B. approximate the time when
  16. Game Theory

    Under a mixed strategy, (A) a player moves sequentially. (B) player chooses among two or more pure strategies according to pre- specified probabilities. (C) the players may never reach a Nash equilibrium. (D) cheating is encouraged. (E) players are
  17. Chemistry

    Consider the data below Temperature(0C) Diffusivity(m2/s) 736 2 x 10-13 782 5 x 10-13 835 1.3 x 10-12 Given this data, determine the activation energy for the diffusion process (units of Joules per atom or molecule) in this material and the pre-exponential
  18. pre school

    The comparison to children with adhd-hi, children with the subtype adhd-pi are greater risk for? A.ANTISOCIAL BEHAVIOR B.REJECTION FROM OTHERS C.ANXIETY AND MOOD DISORDERS D. PLACEMENT IN SPECIAL EDUCATION CLASS *I THOUGHT C BUT WASN'T SURE
  19. Pre- Algebra

    out of 245 students, -218 students like the program -27 do not find the program necessary. if a circle graph were made from this data, what would the measure of the central angle be for the group who likes the survey? round to the nearest whole number
  20. Pre-Calc-Please check answer

    1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) =
  21. Pre-Calc-Please check answer

    1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) =
  22. pre-algebra

    0.85 m=____cm 1 meter (m) = 100 centimeters (cm) You're going from the larger measurement to the smaller measurement, in a way. So which way will you move the decimal? Or ... what will you do: multiply or divide by 100?
  23. pre-calc

    a farmer wants to make a rectangular enclosure using a wall as one side and 120 m of fencing for the other three sides. a) express the area in terms of x and state the domain of the area function b)find the value of x that gives the greatest area. my
  24. Pre Cal 12

    A 12cm by 8cm rectangular piece of metal is to be made into an open-top box by cutting a sqaure from corner and folding up the resulting flaps (sides). If the volume of the lidless box is 36 cm what are the integer dimensions of the box?
  25. calculus

    find the circular cylinder of greatest volume that can be inscribed in a right circular cone with altitude 20 cm and diameter of base 10 cm. please answer in detail ..... so at a height h, the radius is 5(1-h/20) check that. VolumeCone= PIr^2 H = PI h *
  26. pre calc

    you are 7 miles N & 4 miles W of the cabin how do you get back to the cabin? Bearing?
  27. trig pre calc

    cos x (sec x +cos x csc2x)=csc2x
  28. Pre-Algebra ... again :-(

    How do i go about finding the integers of a product and quotient ... like, product of -20 whose quotient is -5 ..... thanks again
  29. Pre-Cal

    1)find f(g(x)) f(x) = x^2 + 2x g(x) = 1/x x^3 + 2x Is this correct? 2) solve: 3^x-1 = 10 ln 3/ ln 10 = .264 Is this correct? I am not sure how to do these. 3) Solve: 3^x+2 - 4 = 12
  30. Pre Algebra

    Simplify: 1: (-12xy2z)(3xy) 2: -12xy2z divided by 3xy 3: 2x(2x - 5) 4: -2x(2x-5) Please help!
  31. Pre- Algebra

    which is steeper, a line with a slope of 7 or a line with a slope of -10? Can you explain it to me also?
  32. Pre Calc

    From a committee of 6 people how many sub-committees of 3 can be formed, and with 7 people and with 8 people and with n people?
  33. pre algebra

    what is the domain of the function below? f(x)= -x^2 + 11 thank you choices are: 1. (- infinity, 11) 2. (-infinity, infinity) 3.(-11, 11) 4. (11, infinity)
  34. pre-algebra

    a tree is 5 ft. tall and has a shadow of 12 ft. if you are 5 ft. tall, what is the length of your shadow
  35. pre-algebra

    a tree is 5 ft. tall and has a shadow of 12 ft. if you are 5 ft. tall, what is the length of your shadow
  36. pre-calc

    how do you solve this: the square root of a+4 plus the square root of a-3 equals 7
  37. Pre-Algebra

    The sum of a number and 3, multiplied by the sum of the number and 4 is equivalent to 16
  38. Pre-Algebra

    1. Which polynomial does the model represent? (One big black square, two white rectangles, one black rectangle, one white cube, and three black cubes.) This is all I need. @Mrs. Sue @Reed
  39. calculus - ratio test

    infinity of the summation n=1: (e^n)/(n!) [using the ratio test] my work so far: = lim (n->infinity) | [(e^n+1)/((n+1)!)] / [(e^n)/(n!)] | = lim (n->infinity) | [(e^n+1)/((n+1)!)] * [(n!)/(e^n)] | = lim (n->infinity) | ((e^n)(e^1)(n!)) /
  40. Pre calc

    The population of a Midwestern city decays exponentially. If the population decreased from 900,000 to 800,000 from 2003 to 2005, what will be the population in 2008? I thought it was 7542 but it is wrong can someone please help me thank you
  41. PRE CALC

    Use matrices to solve the system. (If the system has infinitely many solutions, express your answer in terms of c, where x = x(c), y = y(c), and z = c. If the system has no solution, enter NONE for each answer.) 5x+2y-z=2 x-2y+2z= -1 3y+z= -17 ive done
  42. Pre Calc

    The symbol nCr, rea "n choose r" or "the number of combinations of n things taken r at a time" is the number: n! ----- r!(n-r)! a:find 4C1 b:Find 5C0 and 5C5 c: Find 7C1, 7C2, 7C3
  43. Pre-Calc

    Starkist tuna company will package tuna fish in 2-L cans. Find the radius and the height of the cans if the cans have a surface area which is less that 980 cm^2. I have no idea how to go about this, it seems like geometry to me. Can you give me some help?
  44. Pre-Algebra help PLZ!!

    Hassan deposited $7,500 into a bank account. At the end of 3 years, the account had earned $900 in simple interest. What rate of interest did the account earn per year?
  45. Math -- Calculus

    Some years from now you are working for a book publisher. Your boss asks you to give him a formula that will tell him the length and width of a book page that contains A square inches of printed text, a left margin of L inches, a right margin of R inches,
  46. Pre-Algebra

    HOW DO I DO THIS 5x+(-20)=-60 2-2x=8 I can only assume this is two different questions. On the first, add 20 to both sides. Then, divide both sides by 5 On the second, subtract two from each side, then, divide both sides by -2
  47. pre calc

    You are three miles north and two miles east of a cabin. On what bearing must you walk to reach the cabin? How far are you from the cabin ?
  48. pre-algebra

    After earning interest the balance of an account is $420. The new balance is 7/6 of the orginial balance. How much interest was earned?
  49. Pre Algebra

    the problem is that I have to find the length of x. Here's what they say: Find the missing length, when the perimeter is 9x+11 then here are the length that are given on the shape: 2x+3 and 3x+1 How could I solve this?
  50. pre algebra

    a community has 1316 females. if 47% of the community is female and 16% of all the females are left-handed, how many people are in the community?
  51. PRE-CALC

    sin(arctan(-4/3) okay so i made arctan(-4/3) = x so im solving for sin(x) and x= arctan(-4/3) so then tanx = -4/3 and now im stuck i don't know what to do after that
  52. pre calc

    you are 7 miles north and 4 miles west of a cabin.how far are you from the cabin? on what bearing must you walk to reach the cabin?
  53. Pre-Calc

    Determine the center and the radius of the following circle: x^2+y^2+6x-4y-5=0 I got for the radius 3(sqrt2) I got for the center (-3,2) Can you please tell me if I am correct? The radius seems wierd.
  54. pre algebra

    If a sail of a ship is 10 feet long and has a diagonal length of 26 feet, what is the height of the sail in feet? A 29 B 24********** C 17 D 8
  55. Pre-Calc Help!!!

    Prove the identity. (show your work please) tan(x − π/4)= (tan x − 1)/(tan x + 1) Thank you!
  56. Pre-Algebra

    Given a cylinder and a cone with the same base and the same height Cylinder: r=4 ft and h=3 ft Cone: r=4 ft and h=3 ft What is the volume of the cone in cubic feet? A. 12 π B. 16 π C. 36 π D. 48 π
  57. Math - Pre-Algebra

    44) A financial institution wishes to estimate the mean balances owed by its credit card customers. The population standard deviation is estimated to be $300. If a 98 percent confidence interval is used and an interval of ±$75 is desired, how many
  58. History

    Chinese "communes" were: A. Communist Party committee cadres. B. urban districts established by Mao Zedong. C. the modern equivalent of the traditional cottage industries in pre modern China. D. agricultural communities containing more than thirty thousand
  59. Calculus

    Hi, I have a calculus question that I just cannot figure out, it is about volume of cross sections. I would very much appreciate it if someone could figure out the answer and show me all the steps. A solid has as its base the region bounded by the curves y
  60. Calculus

    Hi, I have a calculus question that I just cannot figure out, it is about volume of cross sections. I would very much appreciate it if someone could figure out the answer and show me all the steps. A solid has as its base the region bounded by the curves y
  61. pre-calc

    A fire has started in a dry open field and is spreading in the form of a circle. If the radius of this circle increases at the rate of 6ft/min, express the toatal fire area A as a function of time t (in minutes
  62. Fundamentals of Storytelling

    I'm conducting a pre-interview with someone about the NHL's new partnership with Rogers Communications in Canada. The questions have to be related to the focus of this story, and I need to use my 5 W's (Who, What, When, Where, and Why) and How. I don't
  63. Pre-Algebra

    Tell whether the question is potentially biased. Explain your answer. If the question is biased, rewrite it so that it is not. Questions: Don't you think the rising cost of concert tickets is ridiculous? Do you support the mayor's proposal to limit crime
  64. pre-calc

    A fire has started in a dry open field and is spreading in the form of a circle. If the radius of this circle increases at the rate of 6ft/min, express the toatal fire area A as a function of time t (in minutes
  65. Pre-Cal

    The 1st year and 3rd year periods for these accounts are the lengths of time that you must keep the money in the account.(you pay a penalty if you take themoney out before the term is up.) Why might an investor choose a CD with a shorter term rather than a
  66. calculus

    If |2x - 1 | > 3 , then which of the following could not be a value of x?
  67. Calculus

    X2-7x-12/x-2
  68. calculus

    3x^2+x+2=0
  69. calculus

    3x^3+4x^2-2x-4=0
  70. calculus

    if (g(x)=x,f(2)=7,and f'(2)=6. what is g'(&)?
  71. Calculus

    g(t) = 1/(t^5 + 1)^2 g'(t)
  72. Calculus

    6e^3t=9e^2t
  73. calculus

    ç(3x+2) dx
  74. calculus

    Dy/dx y=(2x+1)^4e^x
  75. calculus

    Dy/dx of y=e^x/x^2
  76. Calculus

    F(x) = (x^3 - x + 1)^4 f'(x)=
  77. calculus

    I=g^2/da
  78. calculus

    F(x)= ((x^2+2x)/(x^2-1) )^3 *(3x^2 – 2x + 4)^5
  79. calculus

    d^2/dx^2(q(x))-5*(d/dx(q(x)))+6*q(x)=0
  80. calculus

    (10/((n^2)-1)+((2n-5)/(n-1))=(2n+5)/(n+1)
  81. Calculus

    -4=(5/2) x 3-b
  82. Calculus

    H(x) = (x^4 - 2x +7)(x^-3 + 2x^-4) H'(x)=
  83. AP Calculus

    If f(x)=3x^2-x+2 then what is 2f(a)? What is f(2a)? What is f(a^2)? What is [f(a)]^2? What is f(a+h)?
  84. calculus

    f(x)=(1+x) what is f'(x) when x=0
  85. Calculus

    If y = (ln(x-2))/(3e^x, then dy/dx =
  86. calculus

    f'(x) of f(x)= 4e^x/1-e^x
  87. calculus

    d/dx (16-3x- 1/2x^2)= ? I got dy/dx= -3 - x
  88. Calculus

    F(x)= ln ((3t + 1)^4 / (2t + 1)^3) F'(x)=
  89. calculus

    x+4/5 + 5-x/4=37/10
  90. calculus

    4(x*3)=2(x-4)+25
  91. calculus

    dx/dt=5x-2y,dy/dt=4x-y
  92. Calculus

    If y=ln((3x+2)^6(x+10)^3), then dy/dx=
  93. Calculus

    h(x)=(x^12-2)^3 h'(x)=
  94. Calculus

    y= (t^3 + t)/(t^4 - 2) y'=
  95. calculus

    f(12)=15 and f(5)=6 f(x)=
  96. Calculus

    ¡ì(up:1 down:0) (x^3 dx)/(x^2+2x+1)
  97. Calculus

    x dy/dx +2y=1
  98. calculus

    xy-6=0;(2,3)
  99. AP Calculus

    [(3/x)-(4/y)]/[(4/x)-(3/y)]
  100. Calculus

    dy/dx+((2x+1)/x)y=e^-2x