Pre- Calculus

21,812 results, page 69

  1. Pre-aljebra

    a rectangular dog pen is to be constructed so that one side is against an existing stone wall and the other three sides are to be fenced. of 500 feet of fence is to be used, determine the dimensions and area of the pen with maximum area. I have no idea how to solve this problem.
  2. pre-algebra

    can someone please help me to writ an inequality for this wor problem? Mr.Kirkland receives $13/hr. for regular time (8hr./day) and double pay for working on holidays. He worked on Friday even though it was a holiday. If his week's pay was at least $650, how many hours did he ...
  3. pre algebra

    Twice a number is 60 times more than 5 times the number. what is the number
  4. Pre-algebra

    Jack runs 275 miles per day during soccer season. He has already run 25 miles this morning. He plans to run 2.5 miles each day. What is the fewest number of days he will need to reach his goal?
  5. pre calc

    An open box is formedby cutting squares out of a peice of cardboard that is 18 feet by 26 feet and folding up the flaps. What size corner squares should be cut to yield a box that has a volume of 250 cubic feet
  6. pre-calc

    The radius of the earth is approximately 4,000 miles. The acceleration due to gravity is approximately 32 feet per square second. The mass of the earth is approximately 6 × 10^24 kilograms. Calculate the value of G in units of kilograms, meters, and seconds.
  7. Pre calc

    Find sin(2x), cos(2x), and tan(2x) from the given information. sin(x) = 5/13, x in Quadrant I sin(2x)? cos(2x)? tan(2x)? I honeslty just need one good example of how to do these please show all work and finalize answer
  8. Pre-Algebra

    The grocery store sells kumquats for $4.25 a pound and Asian pears for $2 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with $12.
  9. Math - Pre algebra

    Help!!! 1. which of the following is greater than 4.3 x 10>9? a 2.1 x 10>9 b 3.2 x 10>9 c 5.3x 10>9 d 7.4 x 10>8 2. which of the following is less than 6.5 x 10>-5? a 1.4 x 10>-3 b 2.5 x 10-4 c 7.8 x 10-5 d 4.6 x 10>-6 according to the 2010 census the ...
  10. pre calc

    The number of customers that visit a local small business is 29,600 and has been continuously declining at a rate of 2.9% each year. What is the approximate number of customers that visit the business in 10 years
  11. Pre Calc

    If two forces of 5 lb. and 8 lb. are acting on the same point are equivalent to a single force of 10 lb., find the angle between the given forces, and the angle between the resultant and the larger force.
  12. pre algebra

    Julie went to the post office and bought both $0.49 stamps and $0.34 postcards for her office's bills. She spent $62.60. The number of stamps was 20 more than twice the number of postcards. How many of each did she buy?
  13. pre cal

    find the standard form of the equation of a parabola with the vertex (0,0) and the directrix y=6 find the standard form of the equation of the ellipse with center (0,0) and foci at (+- 4square root 3, 0) and verticies (+-8,0)
  14. Pre Algebra

    what would 6(1/3) be equal to? I'm currently doing Exponential Growth and Decay, but I don't quite understand how to do this one.... The problem is y=6(1/3) exponent x and it goes from exponent 1-5... if the exponent is 2, then 6(1/3) exponent 2 would be equal to .66666666.....?
  15. Pre Calc

    To find the number of factors of a number, you get the prime factors and add one to each exponent, then multiply all the exponents. I know how to get that, but I am wondering why you add one. Mathmatical explanation? Can anyone help?
  16. pre algebra

    solve whether the sequence is arithmetic or geometric if it is arithmetic or geometric,state the common difference or common ratio and write the next three terms of the sequence 10,18,26,34
  17. pre-cal

    Find the height of a ball after 3 seconds, if the ball is hit with an initial velocity of 90 feet per second at an angle of 60 degrees from an initial height of 5 feet.
  18. Pre-cal

    Each of the two congruent sides of an isosceles triangle are 10 centimeters more than 1/2 the length of the base. If the perimeter of the triangle is to be at most 100 centimeters, what is the maximum length of the base?
  19. Pre-calc

    Determine a general formula​ (or formulas) for the solutions to the equation. Then determine the specific solutions​ (if any) in the interval[0,2π). 2sin^2θ+3sinθ+1=0
  20. Pre-Calc

    Since cot x = cos x / sin x, if cot x = 1/2, with the angle x in the first quadrant, then cos x = 1 and sin x = 2 (1) State true or false. Is this a possible situation? (2) If false, explain why.
  21. Pre calc

    sin(θ + ϕ); sin(θ) = 5/13 θ in Quadrant I, cos(ϕ) = − 2root 5 over 5 ϕ in Quadrant II please give final answer this is bc i have a lot of trouble simplifying the final answer thank you
  22. calculus II

    (A) 2 students are sharing a loaf of bread. Student A eats half of the loaf, then student B eats half of what remains, then student A eats half of what remains, and so on. How much of the loaf will each student eat? (B) 2 students are sharing a loaf of bread. Student A eats 2/...
  23. philosophy

    which pre-socratic philosopher had that most compelling ideas? Briefly summarize the philosophers idea(s). Why do you find these ideas compelling? Include a practical example of the philosophers idea in your response.
  24. Pre Cal.

    1. Identify the conic section represented by: 9y^2+4x^2 - 108y+24x= -144? Is it ellipse. 2. Find the coordinates of the vertex and the equation of the axis of symmetry for the parabola represented by: x^2 + 4x - 6y + 10 = 0. vertex: (-2 , 1) axis of symmetry: x = -2
  25. Pre Algebra

    The first side of a triangle is 8 meters longer than twice the second side. The third side is 3 times the second side. The perimeter is 128 meters. Find the lengths of the three sides.
  26. Pre-Cal

    The population of Las Vegas, Nevada in 2000 was 478,000 and is increasing at the rate of 6.28% per year. At this rate, when will the population reach 1 million people? a)1.51 years b)2.32 years c)12.12 years d)10.84 years
  27. Pre-Algebra Help

    Alice plays basketball. In one game she shoots 21 free throws and makes 81.25% of them. Estimate how many feer throws she makes? A. About 16 B. About 2 C. About 20 D. About 14 Please, Ms. Sue or someone, help me!!
  28. Physics - Mechanics and Ocsillatory Motion

    Suppose that each of the three masses in the figure below has a mass of 5.05 kg, a radius of 0.0679 m, and are separated by a distance of 9.9 m. If the balls are released from rest, what speed will they have when they collide at the center of the triangle? Ignore gravitational...
  29. Pre-Algebra

    Two similar triangles have a scale factor of 5/3. a) Find the perimeter ratio copy/original b) Find the area ratio copy/original
  30. pre algebra

    the digits 0,1,2,3,4,5,6,7,8,9 are repeated in such a way thatwhen the digits repeat the greatest digit is removed the pattern is repeated indefinitely what is the 1111st digit in this pattern?
  31. Art

    The Barbizon painters were known for their urban, studio created nudes true or false The Pre-Raphaelites advocated an urban, Parisian sophistication in their art: true or false
  32. Art

    The Barbizon painters were known for their urban, studio created nudes true or false The Pre-Raphaelites advocated an urban, Parisian sophistication in their art: true or false
  33. PRE CALC

  34. pre-calc

    a semicircle of radius r=3x is inscribed in a rectangle so that the diameter of the semicircle is the length of the rectangle 1. express the area A if the rectangke as a function 2 express the perimeter P of the rectamgle as a function of x
  35. Pre-Algebra/Math8

    whats the answer to this question:in a city, the record monthly temperature for july is 88°F. the record monthly low temperature is 30 °F. what is the range of temperatures for july?
  36. college pre-calc

    Would a truck that is 12 feet tall and 9 feet wide fit through a parabolic arch that is 15 feet high at the high point and 16 feet wide?
  37. Pre-Calc

    Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6
  38. pre calc

    area of triangle XYZ given:side z=11 side x=7 and side y=13 what are the angles and area please? please explain
  39. pre-algebra

    Rewrite the equation so the variable is alone. Solve to find the value of the variable. 42=-2h Divide both sides by 2. Then change the signs of both sides. That will provide the answer. Possibly in 1 step: Divide by -ve 2
  40. Pre-Algebra

    In 2002 the rate for a first class U.S. postage stamp increased to $0.37. This represent a $0.34 increase since 1917. What is the percentage increase of postage since 1917? Solve the problem using a proportion.
  41. pre-algebra

    I have two questions about finding the slope of a line. First question: Is the formula Y2-Y1 over X2-X1? Second question: When I am given a line on a graph, how do I find Y1, Y2, X1, X2 to use in finding the slope?
  42. philosophy

    o Which of the Pre-Socratic philosophers had the most compelling ideas? o Briefly summarize the philosopher’s idea or ideas. o Why do you find these ideas compelling? o Include a practical example of one of the philosopher’s ideas in your response.
  43. Pre-Cal

    1) verify the identity sec^2 (pi/2 - x) -1 = cot^2 x I think that we can replace sec with csc for the cofunction formulas since there is pi/2. Since there is squared and a 1 I think we could use one of the pythagorean identites but I am not sure which one.
  44. pre calc

    A navy destroyer is exactly 62 miles south of an aircraft carrier, which is travelling W18°S at 24 mph. What speed and bearing must the destroyer maintain if it is to reach the aircraft carrier in exactly 2 hours ?
  45. pre-algebra

    When designing a pattern, Erica rotated a triangle 90 degrees about the midpoint of one side to create a second triangle. If the area of the original triangle is 48 square inches, what is the area of the second triangle?
  46. pre-algebra

    zi drive 420 miles to visit her sister. after she had diven one-third of the way there, she stopped to eat lunch. how many miles did she have left to drive after lunch
  47. pre ap chem

    determine the partial pressure of hydrogen if it's collected over water at 23 degrees celsius and the system has a total pressure of 724 mmHg then determine the mole fraction of water vapor in the system
  48. Pre-Calc

    Three cards are chosen at random from a standard 52-card deck. Find the probability that all three cards are hearts given that there are 13 hearts in the deck. Round to the nearest thousandth. Is this 0.013?
  49. pre calc

    You have a sample of a certain radioactive substance. After two days, thirty percent of the sample has decayed. What is the half-life of the material and how much will have decayed after a week?
  50. pre calc

    You have a sample of a certain radioactive substance. After two days, thirty percent of the sample has decayed. What is the half-life of the material and how much will have decayed after a week?
  51. Math, Pre-calculas

    From each corner of a square piece of cardboard, a square with sides of 3cm is removed. The edges are then up to form an open box. If the box is to hold 243cm^3, what are the dimensions of the original piece of cardboard?
  52. Pre-Calc

    Consider a non-right triangle. a=39 b=25 c = 24.(a,b,c are the sides) Find A,B,C. (these are the degrees of the triangle) I know theres an equation: b^2= a ^2 + c^2 - 2accos(B) and sinA/a = sinB/b = sinC/c but when i do the problem i get A= 74.55 B = 38.16 C = 36.68 but that ...
  53. pre algebra

    A 0.25 kg mass is horizontally attached to a spring with a stiffness 4 N/m. The damping constant b for the system is 1 N-sec/m. If the mass is displaced 0.5 m to the left and given an initial velocity of 1 m/sec to the left, find the equation of motion. What is the maximum ...
  54. math pre-agebra

    how do i write this equation cars the marton family took a vacation that covered a total distance of 1356 miles. the return of the trip was 284 miles shorter than the first part of the trip. how long was the return trip?
  55. Pre Cal

    A circular Ferris wheel has a radius of 9 meters. The ride rotates a rate of 10 degrees per second. When you get in the ride at the bottom the seat is 2 meters above the ground at its lowest point in meters. How high is the seat after 54 seconds.
  56. pre cal

    Find a possible formula for the function graphed below. Assume the function has only one x-intercept at the origin, and the point marked on the graph below is located at (2,12). The asymptotes are x=−2 and x=1. Give your formula as a reduced rational function.
  57. Trig/Pre-Calc

    Need help with current Trig problem for tomorrow: Solve the logarithmic equation algebraically. Approximate the result to three decimal places. 6log3(0.5x)=11 I know to start off the equation you divide by 6. I know the answer is 14.988. I just am puzzled on how to receive the...
  58. Pre Algebra

    A 154-lb person burns 420 calories per hour riding an excercise bicycle at a rate of 15 mi/h. Write a function rule to represent the total calories burned over time by that person. Explain how the information in the problem relates to the function.
  59. Pre cal

    Find the horizontal distance a ball travels after 3 seconds, if the ball is hit with an initial velocity of 90 feet per second at an angle of 60 degrees from an initial height of 5 feet. Round answer to nearest tenth, if necessary. Do not include units.
  60. Math - Pre-Algebra

    A set of building blocks of various shapes and colors. If 30% of the blocks are cubes, and 40% of the cube blocks are red the then _______? what % of the blocks are red cubes.
  61. pre algebra

    steve and ramon earned a total of 104 $ mowing lawns.if ramon earned 3 times as much as steve, how much did each boy earn ?
  62. Pre-Algebra

    The coordinates of quadrilateral VWXY are given below. Find the coordinates of its image after a dilation with the given scale factor. V (6, 2) W (-2, 4) X (-3, -2) Y (3, -5) scale factor of 2
  63. Math Pre-Algebra

    Maria left her house and walked two miles north then she turned and walked 3 miles west. How far is Maria from her house?
  64. Pre-Calc

    If five girls and five boys stand in a circle, how many arrangements are possible provided they stand alternately (girl, boy, girl, boy, etc)?
  65. Pre-Algebra [repost ]

    I need help on these three questions BEFORE 10:00 PM. Please someone show me how to do them step by step! Solve the equation for y in terms of x then find the solutions of the equation for the given values of x. 1.x + y = -1 [values of x: 3, 1, -2] 2.x+ 4y = 20 [values of x: 4...
  66. US History

    3. The War of 1812 ended with a. a clear victory for the US b. a clear victory for Britain c. the removal of all British claims to land in North America d. a return to the pre-war boundaries between the US and British territories. D? Thanks -MC
  67. pre cal

    assuming that Earth is a sphere of a radius 6378 kilometers, what is the difference in the latitudes of Lynchbug, Virginia, and Myrtle Beach, South Carolina, where Lynchbug is 400 kilometers due north of Myrtle Beach?
  68. Pre-Algebra

    Frank had 25 meters of string. He cut off 480 centimeters that became tangled then used 98 centimeters to tie ul some tree branches. How many meters of string did Frank have left?
  69. Pre-Algrebra

    One gallon of liquid occupies 231 cubic inches. Write a rule that expresses the number of gallons g(c) as a function of the number of cubic inches c. Choices are: g(c)=c/231 g(c)=132/c g(c)=231c g(c)=132c
  70. Pre-calc

    Congruent squares are cut from the corners of a 20 in. square piece of tine, and the edges are turned up to make an open box. How large should the squares cut from the corners be in order to maximize the volume of the box?
  71. Pre-Calc, Probability

    From a deck of 52 playing cards, 7 cards are dealt. What are the odds of the following event occuring --4 From one suit, 3 from another The probability of the event occurring is also acceptable. But, the answer is 99/16722971 (as far as the odds go
  72. math

    Pre-Cal between 0 degree C and 30 degree C the volume V (in cubic centimeters) of 1kg of water at a temperature T is given by the formula. V=999.87-0.06426T+0.0085043T^2-0.0000679T^3 Find the temperature at which the volume of 1 kg of water is a minimum.
  73. Math 142 (Pre-Cal) (Circles)

    A wheel spins through 29 revolutions per minute. Find the angular velocity and the linear velocity if the radius of the wheel is 1.8 feet. w=? (rad/min) v=? (feet/min)
  74. Pre-Cal

    A piece of charcoal of mass 35g is found in the ruins of an ancient city. The sample shows a carbon-14 activity or R(t)=4.167 decays/sec. Convert the decay constant of ^14C from (1)(a)in terms of seconds instead of yrs. Find the number of atoms N(t)using constant you found.
  75. Pre Cal

    Due to my child being injured I missed this lecture at class. I am so lost now I read the chapter books but lets face it they don't make those in english. Write a function in factured form, then inexpanded polynomial form, having as zeros 2, -1 and 1 (plus and minus) SQroot of...
  76. pre-algebra

    if a serving has 346 calories, 46 grams of carbs, and 18 grams of protein, determine the # of grams of fat in the serving. c=346, h=46, p=18 f=346-4(46)-9(18)/9 I'm getting a completely different answer than what it's supposed to be. HELP!
  77. Calculus

    Factor the following: y = (x-a)^5 . (x-c)^5 . (a-c)^5 It looks already factored to me
  78. Calculus

    If f(x) is a continuous function, find the constants a and b such that f(x) = { -x -3 <= x <= -2 ax^2 + b -2<x<0 b x=0
  79. Calculus

    q=(1000/p+1)^2 - 1 find q' I will be happy to critique your thinking.
  80. calculus

    integrate ((x^3/6)+(1/(2x)))*squareroot of 1+(x^4/4)+(1/4x^2)-1/2..plz help me...tnx in advance!
  81. calculus

    does anyone know the shortcut to finding the derivative of a function for example: x^3-3x^2
  82. Calculus - Limits

    lim x--> 3 (3 - x)/ (x^2 - 9) I know the answer is -1/6, but I can't figure out how to get there.
  83. Calculus

    Find an equation for the tangent and normal to the curve x^2 + y^2 = 9 at x=1
  84. Calculus Test Question!!!!!

    Find the derivative if y=x^1+sqrt2
  85. calculus

    how do I find the range of a natural log like ln | x/(1+x^2) |
  86. calculus

    f(x)=(y+a)and b=the limit as y aproches 2+f=1000. I need to know what y and a equal.
  87. CALCULUS 1

    Find dL/dx set to zero. Solve for x. (27+x)/x * sqrt(64+x^2)
  88. Calculus

    Find the average value of f(t)=-2te^(-t^2) on the interval [0,3]
  89. Calculus

    Is thsi a solution of an ordered pair (4, -1) 4x = -17 - y 2x = -12 -4y I say yes ? Is this how you do it. 4(4) = -17 - -1 = 2(4) = -12 - 4(-1)
  90. calculus

    calculate the indefinite integral (cosx)/(sin^3x)
  91. calculus

    Find the sum of the series: 10 + 14 + 18 + 22 +...+138 and 6-12+24-48+96-...+1536
  92. calculus

    integrate (x+2)/((x^2+2x+4)^2) the usual partial fractions don't work???
  93. Calculus

    two complex numbers Z and W are related by the formula W=(Z+1)/(1-Z) what is W if Z=1.5i? thanks for the help!
  94. calculus

    how to you use partial fractions to compute the integral of ax/((x^2)-bx)dx?
  95. calculus

    does the series from n=1 to infinity of 1/arctan(2n) converge? I said yes but I didn't know what to
  96. Calculus

    Can someone please tell me how to derive V=4/3pi(r)^3 to get x^2+y^2=r^2?
  97. calculus

    solve the following differential equation: y' + (y)tanh(x) - 2e^x = 0
  98. Calculus

    Find the point where the tangent to the curve is horizontal. f(x) = (x^2-2x+4)/(x^2+4)
  99. Calculus

    Find the equation of the tangent to the curve y=e^x at the point where x=-1.
  100. Calculus

    What is the derivative of y = ln 3x2? a) y' = 2/x b) y' = ln 6x c) y' = 2 ln3 d) y' = e6x I think it's d.) Thanks.
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