Popular questions and responses by Ruth
  1. Pre calc

    evaluate the expression under the given conditions. cos(θ − ϕ); cos(θ) = 5/13, θ in Quadrant IV, tan(ϕ) = − square root15,ϕ in Quadrant II Anyone know how to do this I have never been this confused in my life

    asked on April 11, 2017
  2. Maths

    Two boats A and B left a port C at the same time on different route .B travelled on a bearing of 150 degree and A travelled 8km and B had travelled 10km ,the distance between the Two boats was found to be 12km .calculate the bearing of A's route from C.

    asked on June 13, 2017
  3. maths

    Three bags of wheat,two bags of corn, and one bag of oats weigh the same as one bag of wheat,one bag of corn and five bags of oats,if two bags of corn and one bag of oats weights 25 pounds and one bags of corn weights 10 pounds,How much does one bag of

    asked on October 8, 2016
  4. chemistry

    What separatation method used to separate silver chloride (solid))and sodium trioxonitrate

    asked on January 12, 2018
  5. physics

    an electron moves in the plane of paper toward the top of the page .a magnetic field is also in the plane of the page and directed toward the right .what is the direction of the magnetic force on the electron ?

    asked on March 10, 2016
  6. Chemisty

    How do i convert 0.0024 to scientific notation

    asked on January 11, 2010
  7. writing

    Doctors in the field of preventive medicine concentrate on "preventing disease and to encourage" good health practices. Best way to write the portion? 1) preventing disease and to encourage 2)prevent disease and to encourage 3)to prevent disease and to

    asked on June 10, 2011
  8. writing

    Still, do-it-yourself renovations is usually a source of pride for new homeowners, no matter how hard or how frustrating. what correction should be made to this sentence? 1)remove the comma after still 2)change is to are 3) change the spelling of usually

    asked on June 10, 2011
  9. physics

    Helium gas occupies a volume of 0.04 m 3 at a pressure of 2 x 10 5 Pa (Nm -2 ) and temperature of 300 K. Calculate (i) the mass of the helium. (ii) the r.m.s. speed of its molecules. (iii) the r.m.s. speed at 432 K when the gas is heated at constant

    asked on October 24, 2016
  10. Geography

    What is the relation between geography and chemistry

    asked on October 19, 2011
  11. mathematics

    find the modulus argument and principal argument of each of the following a) i b) -√5

    asked on May 29, 2019
  12. physics

    What is quantity of heat required to melt down completely 1kg of ice at 30 degree celsius

    asked on May 18, 2016
  13. physics

    1)a galvanometer has a resistance of 40 ohm and is of 3 mA full-scale would you modify it to act as a 0-5 A ammeter? 2)the galvanometer described in question 1 is to be converted into a 0-5 V voltmeter. a)when the voltmeter is connected to a

    asked on March 2, 2016
  14. PSY 410 Abnormal Psychology

    HELP- My text book wont let me open on my laptop and I can't seem to find the information I need. Create a timeline that displays the development of abnormal psychology. Include at least seven main milestones

    asked on January 26, 2015
  15. math

    the sum of two different numbers is 40 . if the smaller number is divided by 4 and the larger number by 12 the sum of the quotients is 6.find the larger number

    asked on September 1, 2018
  16. Chemistry

    Hydrazine has the formula N2H4 and is used as a rocket fuel (e.g. for the Apollo moon rockets). It burns in the following reaction for which the enthalpy change is -583 kJ/mol. N2H4(g) + O2(g) → N2(g) + 2 H2O(g) Calculate the N-N bond enthalpy in

    asked on November 15, 2017
  17. physics

    a conducting loop consisting of a half circle of radius r=0.2m and three straight sections the half circle lies in a uniform magnetic field B that is directed out of the page the field magnitude is given by B=(4t^2 + 2t + 3)T .w/r t is in second. an ideal

    asked on March 31, 2016
  18. Math

    For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i don't know how to find for each of the points

    asked on March 26, 2015
  19. chemistry

    calculate the total vapour pressure of mixture of methanol(64g) and ethanol(92g) at 298K given that the pure vapour pressure of methanol is 90mmHg and ethanol is 45mmHg (C=12, H=1, O=16)

    asked on May 24, 2019
  20. Pre calc

    sin(θ − ϕ); tan(θ) = 5/12 θ in Quadrant III, sin(ϕ) = − sqaure root10/10 ϕ in Quadrant IV. I used the sin equation sin(a)cos(b)-sin(a)cos(b) However I am still getting the wrong answer

    asked on April 11, 2017
  21. physics

    a galvanometer has a resistance 60 ohm and is of 5mA full scale would you modify it so as to get 0-10V voltmeter

    asked on March 6, 2016
  22. Math

    Determine the number of diagonals in a regular 40-gpn

    asked on September 13, 2013
  23. math

    list the integers between -5 and 2, inclusive.

    asked on August 27, 2011
  24. writing

    The cost of new homes is high today. Many people are purchasing older homes in need of renovation. the most effective combination of sentences 1 and 2 would include which of the following groups of words? 1) although many homes need renovation 2)although

    asked on June 10, 2011
  25. Physical Education

    The ability of your heart and lungs to work effectively when you exercise and to return to normal when you stop is what? Cardiovascular recovery. I hope this helps. Thanks for asking.

    asked on November 28, 2006
  26. English

    As a senior prefect of your school wite a speech you would give to fresh students telling them at least three things that can make their stay in the school successful

    asked on February 12, 2020
  27. chemistry

    what are the limitations of depression of freezing point

    asked on May 25, 2019
  28. physics

    A stunt flier is moving at 15m/s parallel to the flat ground 100m below,how large must the distance x from plane to target be if a sack of flour released from the place is to strike the target?

    asked on October 8, 2017
  29. Pre calc

    A 20-ft ladder is leaning against a building. If the base of the ladder is 7 ft from the base of the building, what is the angle of elevation of the ladder? (Round your answer to one decimal place.) How high does the ladder reach on the building? (Round

    asked on April 4, 2017
  30. chemistry

    the reaction A+3B->2C+D is first order with respect to reactant A and second order with respect to reactant B if the concentration of A is doubled the concentration of B is halfed and the rate of the reaction would -------by a factor of --------

    asked on March 3, 2016
  31. Algebra (Quadratics)

    The height y (in feet) of a baseball thrown by a child is y = -1/10 x^2 + 3x + 6 where x is the horizontal distance (in feet) from where the ball was thrown. Will the ball fly over the head of another child 30 feet away trying to catch the ball? (Assume

    asked on September 25, 2014
  32. Algebra

    What is the measure of each of the angles of a regular 5 sided polygon?

    asked on September 13, 2013
  33. English

    My task is to write a persuasive article for my chool website about an issue related to school meals. My title is 'Unhealthy heaven' My sub-heading is 'Those hungry humans crave for tasty foods. What will it be?' My introduction's main point is that '

    asked on November 13, 2011
  34. French

    Bonjour! I have to find synonyms for the word Fantastique the synonyms should begin with g .... t... b... s... Thanks

    asked on November 7, 2011
  35. Physics

    7. In a meeting room, there are chairs, a table, and people. Which of these things has a temperature a) lower than, b) greater than, or c) equal to the temperature of the air?

    asked on April 27, 2010
  36. History

    Hello. I am doing an essay on the impact of the industrial revolution. I have done the intoduction and two paragraphs. Please can you give me some feedback. thanks What was the impact of the Industrial Revolution The Industrial Revolution was a period from

    asked on March 3, 2010
  37. Chemistry

    Describe the manner in which ketohexose acts as a reducing sugar in the Benedict test.

    asked on September 16, 2008
  38. Calculus

    Determine the volume of the solid abtained when the region bounded by y=sqrt x and the line Y=2 and x=0 is rotated: (i) about the x-axis (ii) about the line x=4. (i) Each element of the body of revolution with thickness dx, has area pi*(sqrt x)^2 dx = pi x

    asked on August 12, 2006
  39. Math

    Car travels 200 miles using 8 gallons of gas. How many miles per gallon can the car travel

    asked on January 8, 2020
  40. Math

    A bucket when a fifth full holds 10 litres .How many litres will it hold when it is full?

    asked on October 29, 2018
  41. math

    the H.C.Of two numbers is 7and their L.C.M is 140.If one of the numbers is 28,find the other number

    asked on September 1, 2018
  42. math

    Assume x and y have 5:3 profit sharing ratio respectivly and a new member enters by taking 1/5 from x and 1/3 from y.what will be the new ratio of the three people?

    asked on August 10, 2018
  43. pre calc

    To measure the height of the cloud cover at an airport, a worker shines a spotlight upward at an angle 75° from the horizontal. An observer D = 600 m away measures the angle of elevation to the spot of light to be 45°. Find the height h of the cloud

    asked on March 27, 2017
  44. chemistry

    the reaction A+3B—>2C+D is first order with respect to reactant A and second order with respect to reactant B if the concentration of A is doubled and the concentration of B is halved the rate of the reaction would---------------by a factor of-----------

    asked on March 3, 2016
  45. chemistry

    the reaction A+3B->2C+D is first order with respect to reactant A and second order with respect to reactant B if the concentration of A is doubled the concentration of B is halfed and the rate of the reaction would -------by a factor of --------

    asked on March 3, 2016
  46. physics

    a parallel plate capacitor has an area of 5cm^2 and a capacitance of 3.5PF. the capacitor is connected to a 12v battery .after the capacitor is completely charge up the battery is removed. a)what must be the separation of the plates and the charge density

    asked on February 15, 2016
  47. physics

    what is the potential energy of 4 point charges each of value Q at the corners of a square of side length a.

    asked on December 28, 2015
  48. Algebra

    How do I answer this? Robert needs to cut four shelves from a board that is 2.5 meters long. The second shelf is 18 centimeters longer than twice the length of the first shelf. The third shelf is 12 centimeters shorter than the first shelf. The remaining

    asked on April 13, 2015
  49. math

    what is the money value of 0.098

    asked on December 5, 2014
  50. stats

    If a random sample of size n = 65 is drawn, find ¦Ìx, ¦Ò x and P(24 ¡Ü x ¡Ü 26). (Round ¦Ò x to two decimal places and the probability to four decimal places.) ¦Ìx = Correct: Your answer is correct.

    asked on March 3, 2014
  51. Algebra

    Find the equation of the circle having the given center and radius. center (-5,1), radius 6 squared.

    asked on September 14, 2013
  52. Algebra

    A sales force has 10 men and 10 women. A production unit of 7 people is set up at random. What is the probality that it will consist of 3 men and 4 women

    asked on September 14, 2013
  53. Algebra

    In 2000 in country A the average family net worth was $440,000 and there were about 8.4x10to the power of 7, families. Caculate the family worth in country A in 2000.

    asked on March 6, 2013
  54. Algebra

    A tugboat goes 160 miles up stream in 20 hours, return trip downstream takes 5 hours. Find speed of tugboat without the current and the speed of the current

    asked on March 6, 2013
  55. Pre Algebra

    A wooden railing is 82 feet long. It is to be divided into 4 pieces. Three pieces will be the same length, and the fourth piece will be 2 feet longer than each of the other three. Find the length of each piece.

    asked on February 18, 2013
  56. math

    My algebra question is; The ordered pair (3,0) is found? I don't have a clue. Can you help please? Thank you, Ruth

    asked on August 30, 2012
  57. Math

    Tanker boats cannot be in the bay when the depth of water is less or equal to 25 feet. Set up an inequality and solve it graphically to determine all points in time, t, on the interval 0 less than or equal to t less than or equal to 24 when tankers cannot

    asked on August 22, 2012
  58. Econ/stats

    The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) $34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Develop a least-squares regression line and explain what the slope of the line

    asked on April 29, 2012
  59. Physics

    Why would you get an e3lectric shock if you flew a kite close to the electricity wires?

    asked on March 13, 2012
  60. PHYSIC

    1)What must be the orbital speed of a satellite in a circular orbit 740 above the surface of the earth? 2)What is the period of revolution of a satellite with mass that orbits the earth in a circular path of radius 8000 (about 1630 above the surface of the

    asked on November 8, 2011
  61. Biology

    I have written an answer for the question below. Why do Ellie and her brothers resemble her parents? Explain how genetic information passes from parents to their offspring. Please check if i have included all the scientific words and if i have explained

    asked on November 5, 2011
  62. French

    Thank you so much for your help so far Sra! Highly appreciated! This might get confusing! I hope it wont! Key: ' ' - corrections { } - The parts you do not understand ( ) - what i want to say(in english) to replace the parts you do not understand. Hope

    asked on October 25, 2011
  63. French

    My homework task is to write an introductory email to my french exchange partener about:yourself, how you get on with your family, what your views on marriage are, a descrition of your best friend(s), what you did yesterday and what your plans for the

    asked on October 25, 2011
  64. PYSICS

    The upward normal force exerted by the floor is 600 N on an elevator passenger who weighs 610 N. What is the reaction force to the upward normal force exerted by the floor? What is the reaction force to weight of the passenger? What is the magnitude of the

    asked on October 19, 2011
  65. math

    write the opposite, reciprocal, and absolute value of each number . A: -1/2 #: 4 C: 0

    asked on September 9, 2011
  66. writing

    They emphasized the importance of good maternal and child health care, including the administering of vaccines. what correction should be made to this sentence? 1) replace they with it 2) change emphasized to emphasize 3) change the spelling of importance

    asked on June 10, 2011
  67. writing

    Sentence 10: Finally, friends whom you haven't seen in years, long-lost relatives, and even mere acquaintances will begin calling in february to plan a lengthy visit with you in the summer. what correction should be made to this sentence? 1)change friends

    asked on June 10, 2011
  68. algebra

    t squared plus 10t plus 16

    asked on April 6, 2011
  69. Pos/110 american government

    Can someone help please??? 1. Assignment: American Government Concepts • Resources: Chapter 1 of the text lists several key concepts in American government. Among these are government, politics, policymaking system, public policy, democracy, majority

    asked on March 30, 2011
  70. English Criticism

    POEM FOR ELSA by Michael Roberts THAT day the blue-black rook fell pitifully dead You wept and stormed, tossing your lovely head, Hurling commiseration into broken skies That wept and wept, vainly as any eyes. You pitifully wept, nor would be comforted

    asked on November 22, 2008
  71. science

    ogranelle that modifies,packages and transport material out of the cell describes an organism that can exist onlly as a group of cells one of the structures a cell uses t o live ,grow and reproduce Ruth, Shondra, Jimmy -- We do not do your homework for

    asked on August 19, 2007
  72. math

    a plane leaves an airport P 10 degrees south,60 degrees east and flies due north at 800km/hr .(a)find its position after 24hrs. (b)the plane turns and flies at the same speed due west to reach Q longitude 12 degrees west.find the distance it has travelled

    asked on February 19, 2020
  73. math

    a plane leaves an airport P 10 degrees south,60 degrees east and flies due north at 800km/hr.find its position after 24hrs

    asked on February 19, 2020
  74. Calculus

    Find the distance traveled in 45 seconds by an object traveling at a velocity of v(t) = 20 + 3cos(t) feet per second.

    asked on January 15, 2020
  75. Chemistry

    During the determination ofCaCO3 in chalk content by back titration. a_what inert materials are likely to be present? b_suggest other suitable indicators of the reaction.

    asked on October 27, 2019
  76. maths

    jimush walks 40m eastward and 30m southward the angle made between the two distance is 90degree calculate the other angels

    asked on October 13, 2019
  77. Chemistry

    Ethanol has a density of 0.789 g/ml what volume of ethanol in litres would have a mass of 500g

    asked on September 30, 2019
  78. mathematics

    perform the indicated operation and express your result In a standard form i) (4+3i) + (6+4i) ii) 3 + 4i/6+3i

    asked on May 29, 2019
  79. mathematics

    in a class of 50 student,18 offered mathematics, 21 offered chemistry while 16 offered biology, 7 student offered mathematics and biology, 9 student offered chemistry and biology while 5 student offered the three subject combination. a) find the numbers of

    asked on May 29, 2019
  80. life orientation

    how can i advise a friend who response to a conflict avoidance that is not a healthy for sustaining positive relationship

    asked on February 3, 2019
  81. math

    The human resources department of a consulting firm gives a standard creativity test to a randomly selected group of new hires every year. This year, 50 new hires took the test and scored a mean of 111.6 points with a standard deviation of 14.3. Last year,

    asked on December 14, 2018
  82. Chemistry

    If 20g of NaCl was used to form a 250cm3 of saturated solution of NaCl at 25oC. Calculate the solubility of the salt in mol/dm3 at that temperature. (Relative density of solution-1).

    asked on December 12, 2018
  83. Biology

    List 15 mechanical and 15 biological vectors and the diseases they transmit.

    asked on November 13, 2018
  84. Math

    Solve 1/8^2-3x=2y+2 find x using equation formula

    asked on October 27, 2018
  85. Math

    Solve 1/8^2-3x=2y+2 find x using e question formula

    asked on October 27, 2018
  86. physics

    describe the force board experiment to show how to obtain the resultant of two non-parallel coplanar forces acting at a point.

    asked on September 12, 2018
  87. math

    Two fractions have the same denominator,15. The difference between the fractions is 2/5,and the result of dividing one of them by the other is 4/7. What are the fractions?

    asked on September 8, 2018
  88. math

    If (a+b)^2 = a^2 + 6b +b^2 ,what is the value of a?

    asked on September 1, 2018
  89. science

    Importance of reflection of sound waves

    asked on August 21, 2018
  90. math

    a contractor needs two men and 5 litres of paint to paint on a fenced wall that is 40m by 3m in 9 hours. how many men and how much paint does he need to paint a fenced wall 20m by 12m in 3 hours

    asked on August 21, 2018
  91. math

    express 7.179179... as a fraction

    asked on August 20, 2018
  92. math

    Express 4.050505... as a fraction

    asked on August 20, 2018
  93. math

    a candy mixture is made from two kinds of candy one kind costs twice as much per kg as the other kind.$10 worth of the less expensive candy is mixed with $8 worth of the more expensive candy to make 7kg of the mixture what is the price per kg of each kind

    asked on August 19, 2018
  94. Math

    An arc of lemgth 28cm subtends an angle at the centre of a circle. In the same circle, what angle does an arc of length 35 subtend

    asked on March 9, 2018
  95. English

    Vaping should be outlawed. Agree or disagree?

    asked on November 17, 2017
  96. Math

    Find the square root of 25xsquared-40xy+16ysquared

    asked on September 15, 2017
  97. HOME ECO


    asked on May 21, 2017
  98. business mathematics

    Please assist me to factorise the following. 4x^3 + 5x^2y - 4xy^2 - 5y^2 \

    asked on April 2, 2017
  99. Math

    Each day Trinh buys a can of soda at a machine in her apartment building for $.75. Instead, she could buy a 12-pack at the grocery store for $4.99. If she did this, how much money would she save in a month

    asked on October 25, 2016
  100. Physics

    a 1 kg textbook has been pushed and let go sliding to the left on a flat table no one is pushing the book at this moment. it is sliding a. calculate the weight of the textbook? How do I do these calculations? b. based on this weight, what must the normal

    asked on October 16, 2016


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