Popular questions and responses by thomas
  1. math

    43. A phone company charges 10 cents per minute for the first 3 minutes of a call, and 10-cents for each minute thereafter.What is the cost, in cents, of a 10-minute phone call? a. 200-20c b.100c+70 c. 30+7c d.100-7c e. 100-70c please answer and explain

    asked on May 30, 2014
  2. Mathematics

    A Point X is 34m due east of a point Y.The bearings of a flagpole from X and Y are N18degreeW N40degreeE respectively. Calculate the distance of the flagpole from Y

    asked on August 4, 2020
  3. MATH

    If a square of side length x is cut in half, what is the perimeter of one of the resultant halves?

    asked on January 10, 2014
  4. statistics

    Suppose that the average score on the GMAT exam is 500 and that the standard deviation of all scores is 100 points. You would expect approximately 95% of all GMAT scores to be between

    asked on July 24, 2013
  5. math

    The iength of a rectangle is 3 inches greater than its width and its area is 88 square inches.An equation that may be used to find the width w of the rectangle is a. 3w^2=88 b. w^2/3=88 c. w^2+3w-88=0 d. w^2-3w=88 e. w=29.3 please answer and explain

    asked on May 2, 2014
  6. Trigonometry

    Find the maximum value of |r| and any zeros of r. (Assume 0 ≤ θ < 2π. Enter any zeros as a comma-separated list.) r = 5 + 10cosθ

    asked on April 27, 2019
  7. Trigonometry

    Find all solutions of the equation in the interval [0, 2π). (Enter your answers as a comma-separated list.) cos(x+3pi/4) - cos(x-3pi/4) = 1

    asked on March 1, 2019
  8. Chemistry

    Complete and balance the following molecular equation. Cu(OH)2(s)+HClO4(aq)→ And write the net ionic equation for it.

    asked on February 26, 2019
  9. math

    When x is divided by 3,the remainder is z.In terms of z, which of the following could be equal to x ? a. z-3 b. 3-z c. 3z d. 6+z e. 9+2z please answer and explain

    asked on May 26, 2014
  10. math

    A pulley whose diameter is 9 inches is connected by a belt to another pulley whose diameter is 6 inches. If the larger pulley runs at 1200 revolutions per minute, at how many revolutions per minute does the smaller pulley run? a. 800 b. 1080 c. 1600 d.

    asked on April 23, 2014
  11. Math

    Suppose f(x) = sin(pi*cosx) On any interval where the inverse function y = f –1(x) exists, the derivative of f –1(x) with respect to x is: a)-1/(cos(pi*cosx)), where x and y are related by the equation (satisfy the equation) x=sin(pi*cosy)

    asked on April 9, 2015
  12. maths

    95. Suppose that 387 people will travel on a space shuttle with room for 420 people.Each compartment seats 14 people before the next compartment opens.How many people will ride in the last compartment that opened?

    asked on October 9, 2014
  13. Trigonometry

    Write the expression as a trigonometric function of only θ, and use a graphing utility to confirm your answer graphically. cos((9π/2)-θ

    asked on March 1, 2019
  14. physics

    A spiral spring has a lenght of 14cm when a load of 4N is hung on it.A force of 6N extends the spring by 4cm.calculate the unstretched lenght of the spring.

    asked on March 9, 2018
  15. physics

    which ball has more energy a 5 kg ball rolling at 4 m/s or a 6 kg ball rolling at 3 m/s?

    asked on October 7, 2016
  16. Calculus

    Suppose that y=f(x) = sqrt(2x), x>=0 Find a c > 0 such that the tangent line to the curve y = f(x) at x = c has the same slope as the tangent line to the curve y = f^–1(x) at x = c. You get: c = 1/8 c = 1/2 c = (1/8)^(1/3) c = (1/3)^(2/3) c = (1/2)^(1/3)

    asked on April 9, 2015
  17. math

    54. The volume of certain rectangular solid is 12x. If the dimensions of the solid are the integers x,y,and z,what is the greratest possible value of z? a. 36 b. 24 c. 12 d. 6 e. 4 please answer and explain

    asked on May 26, 2014
  18. math

    If the area of a circle increases by a factor of 9, by what factor does its circumference increase ?

    asked on January 11, 2014
  19. English

    How would "In a Station of the Metro" change if the bough was bright and lively rather than wet and black?

    asked on January 11, 2018
  20. Biology

    Sort the terms and phrases as to whether they function in or describe primary growth or secondary growth? Place each term or phrase to the appropriate bin. If the term or phrase describes both primary and secondary growth, place it to the "both" bin. If

    asked on March 9, 2014

    What is the intermolecular force that exists between a magnesium ion and a hydrogen sulfide? A dipole dipole b london dispersion c ionic bond d ion dipole e ion ion

    asked on December 9, 2011
  22. History

    In Uncle Tom's Cabin, (the book) did blacks have a racial caste system? Please explain.

    asked on August 5, 2018
  23. calculus

    A snowball is melting at the rate of 2 inches per hour. How fast is the surface area of the snowball changing at the instant the snowball has a radius of 3 inches i tried (d/dt) = 4pir^2 (dr/dt) its multiple choice and -72pi isnt there so im just trying to

    asked on August 28, 2015
  24. Calculus

    For the function f(x) = x^2 - 4x +5, x>= 2, which is equal to d/dx (f-1 this is the inverse)(x)) ? 1/(2y-4) where x and y are related by the equation (satisfy the equation) x=y^2-4y+5 x>= 1 2y-4 where x and y are related by the equation y= = x^2 - 4x +5,

    asked on April 9, 2015
  25. math

    AOD is a diameter of circle O. The coordinates of points A and D are (-11,-5)and (-3,-5)Find the area of circle O. a. 9 pi b. 16 pi c. 25 pi d. 64 pi e. 116 pi please answer and explain

    asked on April 27, 2014
  26. Computers C++

    1). The name of an array stores the __________ of the first array element. 1) memory address 2) value 3) element number 4) subscript 5) None of these

    asked on July 9, 2013
  27. Calculus AB

    For the function f(x) = sqrt(9-x), which is equal to d/dx(f-1( -1 is the inverse)(x)) a) -2x b) sqrt(x) + 9 c) x^2 + 9 d) 2x e) 9-x^2

    asked on April 9, 2015
  28. math

    In a certain boy's camp, 30% of the boys are from New York State and 20% of these are from New York City.What percent of the boys in the camp are from New York City? a. 60% b. 50% c. 33% d. 10% e. 6% please answer and explain

    asked on August 8, 2014

    I know this question is already on here but the answer wasn't helpful to me. Liquid Sodium can be used as a heat transfer fluid. Its vapor pressure is 40.0 torr at 633 C and 400.0 torr at 823 C. Calculate its heat of vaporization.

    asked on December 9, 2011
  30. Mathematics

    A bag contains 6 blue balls, 4 green and 2 red. If you put your hand in and picked a ball at random what are the chances it is blue? A. 45% B. 60% C. 50% D. 33.3%

    asked on June 29, 2020
  31. Maths

    How many squares in the plane have two or more vertices on dots in this 2x3 grid? All dots are an equal distance from their nearest neighbours. *diagonal squares count* -------------------------------------- I can only get 18, but some of my class members

    asked on April 7, 2017
  32. Math

    Suppose f(x) = 4x^5-(1/x^4) Find the slope of the tangent line to the graph of y = f^–1(x) at (3, 1). You get: 1/24 1/16 00062 1620 972

    asked on April 9, 2015
  33. Calc AB

    Suppose that f(x) is an invertible function (that is, has an inverse function), and that the slope of the tangent line to the curve y = f(x) at the point (2, –4) is –0.2. Then: (Points : 1) A) The slope of the tangent line to the curve y = f –1(x) at

    asked on April 9, 2015
  34. maths

    99. From a box containing 5 black marbles,8 pink marbles, 6 white marbles, and 5 yellow marbles, Kim removed 4 marbles,one of which was black.If she removes one more marble at random,what is the probability that it will be black? a. 1/6 b. 4/21 c. 1/5 d.

    asked on October 9, 2014
  35. math

    In triangle ABC, angle B = 3, angle A and angle C = 8 angle A. How many degrees are there in angle B ? a. 15 degree b. 30 degree c. 45 degree d. 60 degree e. 120 degree please answer and explain

    asked on April 19, 2014
  36. math

    If the side of a square increases by a factor of 3, by what factor does the area of the square increase?

    asked on January 10, 2014
  37. Physics; Elect.

    1. A charge (uniform linear density=9.0 nC/m) is distributed along the x-axis from x=0 to x=3.0m. Determine the magnitude of the electric field at a point on the x axis with x=4.0m. a)81 N/C b)74 N/C c)61 N/C d)88 N/C e)20 N/C 2. A +2nC point charge is

    asked on February 1, 2011
  38. Chem Please HELP!!!!!!!!!!!!!!!

    Which of the following bonding patterns DOES NOT happen? C-H-C =C= H-H All of these bonding patterns can happen.

    asked on September 30, 2009
  39. Managerial ECON

    Suppose that a firm is currently employing 20 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is $3,600. a. What is marginal cost? b. What is

    asked on April 5, 2008
  40. English

    Replace the nouns with pronouns Martha and I had to leave early after school?

    asked on February 12, 2020
  41. Trigonometry

    Convert the rectangular equation to polar form. Assume a > 0. x^2 + y^2 - 9ax=0

    asked on April 27, 2019
  42. Trigonometry

    This was a bit much to type out, so I took a snip of it.

    asked on March 1, 2019
  43. Chemistry

    Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, simply write No Reaction. Chromium metal is immersed in an aqueous solution of cobalt(II) chloride.

    asked on February 26, 2019
  44. math

    The average monthly temperatures in New Orleans, Louisiana, are given in the following tables: MonthJFMAMJ°C 16.5 18.3 21.8 25.6 29.2 31.9 MonthJASOND°C 32.6 32.4 30.3 26.4 21.3 18.0 What characteristics of the function correspond to the constants a, b,

    asked on September 1, 2017
  45. Calculus applications

    6. The bending moment (M) along a beam is M = WLx/2 -Wx2/2 kNm where x is the distance of a beam length L from the left hand end. W is the weight per unit length. (a) Shear force is calculated as the differential of bending moment. Find an expression for

    asked on December 5, 2016
  46. Math

    Find the coordinates of the point at 180 degrees on a circle of radius 3.4 centered at the origin. Round your answers to three decimal places, if required. ( , 0 ) I got 0 as the y coordinate. Please help me solve for x

    asked on October 24, 2014
  47. math

    The number of diagonals, d, in a polygon of n sides is given by the formula d=n^2-3n/2. If a polygon has 90 diagonals, how many sides has it? a. 8 b. 10 c. 12 d. 15 e. 20 please answer and explain

    asked on April 27, 2014
  48. math

    If r = square root 3V/pi*h , by what number must we multiply V in order to multiply r by 9 ? a. 3 b. 9/2 c. 9 d. 18 e. 81 please answer and explain

    asked on April 19, 2014
  49. math

    A cow is attached to a rope in a pasture bordered by two fences ( each 60 feet long) which meet at an angle of 24 degree. If the rope attached to the cow is 15 feet long, over how many square feet can the cow graze? a. 2 pi b. 15 pi c. 30 pi d. 45 pi e.

    asked on April 18, 2014
  50. math ( Terminology )

    The " lumper " of a number is equal to the sum of all the prime numbers less than that number. If the lumper of x is equal to the lumper of x + 3, which of the following is a possible value of x ? a. 7 b. 8 c. 9 d. 10 e. 11 please answer and explain

    asked on January 19, 2014
  51. Computers C++

    1.) Look at the following array definition. int numbers[] = { 2, 4, 6, 8, 10 }; What will the following statement display? cout

    asked on July 12, 2013
  52. Physics

    What is the maximum equipment needed to determine the power dissipated in a resistor of unknown value? 1) a voltmeter, only 2) An ammeter only, 3) a voltmeter and an ammeter only 4) a voltmeter, an ammeter, and a stopwatch

    asked on March 12, 2012
  53. Math

    how do i find the revolutions per minute of a pulley that is turned 120 degrees per second?

    asked on February 2, 2011
  54. Chemistry

    Complete and balance the following molecular equation. Al(OH)3(s)+HNO3(aq)→ And write the net ionic equation for it.

    asked on February 26, 2019
  55. Chemistry

    What is the net ionic equation for HBr(aq)+Ca(OH)2(aq)→?

    asked on February 26, 2019
  56. Chemistry

    We are asked to write the three products of the reaction between CH3COOH and NaHCO3(given one is a gas) They would be, 1)CH3COO^-(Na)^+ 2)CO2(g) And what would be the third product? As NaHCO3 is acidic would that be Na2CO3? Because CH3COO^-(Na)^+ is a weak

    asked on July 24, 2017
  57. math

    Tom used 5/8 yard of ribbon to tie weights on the tail of his kite. He cut the length of ribbon in equal pieces that were 1/12 yard long. How many pieces, each 1/12 yard long did Tom cut from the 5/8 yard ribbon?

    asked on October 28, 2016
  58. Math

    All students in Peter's class have $1.05, consisting of nickels and/or dimes and/or quarters. Each student has a different combination of coins, and all possible combinations of coins are included. What is the probability that Peter is unable to give his

    asked on September 21, 2016
  59. math

    4 red marbles, 3 green, 2 yellow. you pick 2 at random.What is probability of a. 1 yellow & 1 red b. 2 green

    asked on March 17, 2016
  60. Math

    A train leaves San Diego at 1:00 PM. A second train leaves the same city in the same direction at 4:00 PM. The second train travels 78 mph faster than the first. If the second train overtakes the first at 6:00 PM, what is the speed of each of the two

    asked on December 2, 2015
  61. Finance

    Problem 10-32 Project Evaluation [LO1] Aria Acoustics, Inc. (AAI), projects unit sales for a new seven-octave voice emulation implant as follows: Year Unit Sales 1 86,000 2 99,000 3 113,000 4 108,000 5 89,000 Production of the implants will require

    asked on November 7, 2015
  62. math

    If the number of square inches in the area of a circle is equal to the number of inches in its circumference,the diameter of the circle is a. 4 inches b. 2 inches c. 1 inches d. pi inches e. 2 pi inches please answer and explain

    asked on August 9, 2014
  63. math

    When a is divided by 7,the remainder is 4.When b is divided by 3,the remainder is 2.If 0

    asked on May 30, 2014
  64. math

    SHURGRO fertilizer contains 18% ammonia plus carbon compounds.If 80% of the ammonia contains the chemical element nitrogen, what percent of this fertilizer is nitrogen? a. 14.4% b. 18% c. 38% d. 40% e. 62% please answer and explain

    asked on May 4, 2014
  65. math

    The area of a triangle whose legs are in the ratio of 2:3 is 48. The length of the hypotenuse is a. square root 13 b. 8 c. 2 square root 52 d. 12 e. 208 please answer and explain

    asked on April 23, 2014
  66. Math word problems

    Susan uses 15 rolls of ribbon to decorate 10 wedding baskets. Each roll of ribbon is 5 3/8 yards long. After she decorates the baskets, she decides to cut off another 3/4 yard from the ribbon of each basket. Write and simplify an expression to fin out how

    asked on April 7, 2014
  67. Physics please help?????

    (a) At a certain instant, a particle-like object is acted on by a force F=(2.9N)i-(1.7N)j+(5.7N)k while the object's velocity is v= -(3.2m/s)i+(4.5m/s)k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the

    asked on March 10, 2014
  68. math

    The square of negative nonzero integer is equal to four times of its absolute value. What is the integer?

    asked on February 6, 2014
  69. math

    If the radius of a circle is doubled, by what factor does the circumference increase?

    asked on January 10, 2014
  70. math

    A circle has an area of 25 pi cm^2.If a circle is drawn within that circle with a diameter equal to the radius of the first circle, what is the area of the second circle? a. 2 1/2 pi cm^2 b. 4 1/4 pi cm^2 c. 5 1/4 pi cm^2 d. 6 1/4 pi cm^2 e. 7 1/2 pi cm^2

    asked on January 5, 2014
  71. CHM

    As the number of solute particles in a given volume of solution increase will: freezing point increase, vapor press decrease? or vice versa or boiling point increase, vapor pressure decrease? or vice versa?

    asked on January 13, 2013
  72. psychology

    Hello, where can I look to find the answer for how are research methods Godly?

    asked on June 3, 2012
  73. college physics

    Each of four particles moves along an x-axis. Their coordinates (in meters) as functions of time (in seconds) are given by: Particle #1: x(t)=2t^2-4 Particle #2: x(t)= -3t-4 Particle #3: -2t^2-4 Particle #4: 2 *[sq. root (t+1)] -4 Which of these particles

    asked on August 24, 2010
  74. math

    True or false? In every triangle, the centroid, incenter, and circumcenter are collinear.

    asked on October 8, 2009
  75. calculus - limits

    can someone help me determine that limit for the following function, as x --> -2? 2 - abs(x) / 2 + x

    asked on October 4, 2009
  76. math

    A class elects two officers, a president and a secretary/ treasurer, from its 12 members. How many different ways can these two offices be filled from the members of the class?

    asked on September 28, 2009
  77. Science

    Which gas found in the Earth's atmosphere greatly impacts the daily range of temperature on Earth. A) oxygen B) hydrogen C) nitrogen D) water vapor

    asked on May 13, 2020
  78. Math

    Find the distance traveled in 24 seconds by an object traveling at a constant velocity of 14 feet per second.

    asked on January 15, 2020
  79. Trigonometry

    Find the maximum value of |r| and any zeros of r. (Assume 0 ≤ θ < 2π. Enter any zeros as a comma-separated list.) r = 19 - 19sinθ

    asked on April 27, 2019
  80. Math

    Determine the proceeds of a promissory note for $3,600 with interest at 6% p.a. compounded quarterly, issued September 1, 2008, due on June 1, 2014, and discounted on December 1,2010 at 8% compounded semi-annually.

    asked on April 3, 2019
  81. Math

    What would (4sqrt(3)-2sqrt(5) be multiplied by to get a product of (4sqrt(3))^3 - (2sqrt(5))^3?

    asked on October 11, 2017
  82. Physics

    A single sphere of water is created by joining 1000 of water spheres of radius r and charge (+Q).If the potential of the small and big spheres are w and v respectively, find v/w. My thoughts : The masses of the spheres are proportional to the third power

    asked on July 23, 2017
  83. Science

    Why do earthquakes appear near the San Andreas Fault?

    asked on June 1, 2017
  84. Math

    A test has 12 problems, and each problem is worth 5 marks. Full marks are given for a correct answer, 2 marks are given if there is no answer, and no marks are given for an incorrect answer. Some scores between 1 and 60, are impossible to get on this test.

    asked on March 15, 2017
  85. Math

    In Alaska Mt.McKinley is 890 meters taller than Mt. Foraker and 1198 meters taller then Mt. Blackburn is 4996 meters. What is the height of Mt. Foraker?

    asked on March 5, 2017
  86. Math

    There are 52 white keys on a piano. The lowest key is A. The keys are designated A, B, C, D, E, F, and G in succession, and then the sequence of letters repeats, ending with a C for the highest key. a) If five notes are played simultaneously, in how many

    asked on March 5, 2017
  87. Math

    IF the LCM of two numbers a and b is 40, what is the LCM of 7a^2 and 7b^2?

    asked on January 26, 2017
  88. Calculus applications

    A steel factory wishes to make a cylindrical container, of thin metal, to hold 100cm³, using the least possible area of metal. If the outside surface is S cm² and the radius is r cm, show that S = 2πr² + 200r-1 and hence find the required radius and

    asked on November 24, 2016
  89. math

    Dee used 2 1/3 cups of sugar for a cake recipe.If the amount of sugar the container holds is 3 times the amount she used,does the container hold more than,less than,or equal to 3 cups of sugar

    asked on December 3, 2015
  90. math

    How can x-8 be modeled by being described as a situation? Answer:8x

    asked on November 11, 2015
  91. Physics

    Which one of the following actions would make the maxima in the interference pattern from a grating move closer together? A.Increasing the distance to the screen. B.Increasing the number of lines per length. C.Decreasing the number of lines per length.

    asked on August 11, 2015
  92. chemistry

    under what conditions could the decomposition of Ag2O(s) into Ag(s) and O2(g) proceed spontaneously at 298 K? 2Ag2O(s)---->4Ag(s)+O2(g) dG=22.42 Kj answer= 0.000118 atm.

    asked on May 9, 2015
  93. chemistry

    dG for the formation of Hi(g) from its gaseous elements is -20.2 kj/mol at 500k. when the partial pressure of HI is 10 atm, and I2 0.001 atm, what must the partial pressure of hydrogen be at this temperature to reduce the magnitude of dG for the reaction

    asked on May 9, 2015


    asked on April 12, 2015
  95. math

    If the circumference of a circle is the same as the perimeter of the square with a side as 4 pi in, what is the area of the circle in square inches?

    asked on August 8, 2014
  96. Physics

    If the thickness of the probe in the direction of B is 1.97 mm, calculate the charge-carrier density (each of charge e).

    asked on August 2, 2014
  97. math

    J.C. Nichols department store reports that the average sales on Saturdays is twice that on Thursdays and the average sales on Thursdays is twice that on the other four days.What fraction of the weekly sales are made on Thursdays? a. 1/7 b. 1/5 c. 2/7 d.

    asked on May 23, 2014
  98. math

    A cow is attached to a rope 10 feet long in a pasture bordered by two fence( more than 10 feet long) meeting at an angle of 60 degree. What is the area of the space in which the cow is grazing? a. 20 pi b. 5 pi /3 c. 20 pi /3 d. 50 pi /3 e. 100 pi please

    asked on May 9, 2014
  99. math

    Abe can mow the lawn in 15 minutes.Ben can mow the lawn in 20 minutes.Carl can mow the lawn in 30 minutes.They work together for 5 minutes.What part of the lawn was mowed? a. 1/4 b. 2/3 c. 3/4 d. 4/5 e. all of it please answer and explain

    asked on May 8, 2014
  100. math

    The distance between two points is correctly expressed as 720 statute miles or 630 nautical miles. Which of the following most closely approximates the value of one statute mile in terms of nautical miles? a. 0.88 b. 0.89 c. 0.90 d. 1.14 e. 1.25 please

    asked on May 4, 2014


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