1. Math

    Flying into the wind, a plane takes 8 h to travel 5432 km from Paris to Montreal. The same plane flying with the wind from Montreal to Paris takes only 7 h. Find the speed of the plane and the speed of the wind. Can you plz answer this sir I really would

    asked by gagan on January 22, 2009
  2. Math

    In an election of two candidates the successful candidate secured 236 votes more than his rival.If the rival candidate obtained 1/6th of the total votes secured by the successful one in addition to his own votes, he would have won the elections by 42

    asked by Danica on July 4, 2007
  3. math

    A ship leaves POrt P and sails 28km away on bearing of 70 degrees to POrt Q. The ship then turns on a bearing of 160 degrees and sails 21km to POrt R. Find angle PQR, calculate the distance PR, Determine the bearing of R from P. angle PQR = 180 degrees -

    asked by Pamela on February 22, 2016
  4. math

    There are 70 woman in a club. Each plays at least one of the following games: volleyball, basketball and table tennis. 20 play volleyball only,10 play basketball only and 6 play table tennis only. 4 play all the three games and an equal number play two

    asked by Douglas on December 22, 2016
  5. math

    Two cyclist left a sports ground at the same time. The first cycled on the bearing of 30 degree and the second cycled on the bearing of 329 degree. After the first cyclist had covered twice as long as the distance covered by the second cyclist, the

    asked by ken on May 11, 2019
  6. Please math help

    A: I am choosing an integer. I then subtract 10 from the integer, take the opposite of the result, add -3, and find the opposite of the new result. My result is -3. What is the original number? B: Judy wants to do the activity in part (a) with her

    asked by KG on September 25, 2014
  7. Animal Farm

    According to Benjamin, what is the one unalterable law? How does his idea compare to actual conditions in the Soviet Union today? --------------------------------------------------------------------------------------- This is the passage this question is

    asked by Emily on December 7, 2008
  8. math

    The 6th grade classes have started a contest to collect cans for recycling. The first class to reach 500 cans will win. The chart below shows the two classes in the lead. How many cans does each class have left to meet their goal? show the work . find how

    asked by raj on March 24, 2014
  9. statistics

    4. John Rengel is the Quality Assurance Supervisor for Vino Supremo Vinyards. He knows that 10 percent of each box of corks is undersized. (6 pts) a) If he were to randomly select 120 corks from the next box, then how many of these corks would John expect

    asked by Lise on May 8, 2014
  10. diversity

    What is the social challenges african americans have to face and find most difficult to overcome In my opinion as a European-American, one of the biggest challenges faced by African-American young people is the bias among some African-Americans against

    asked by Lejora on May 18, 2007
  11. maths

    if alpha and bita are the zeros of polynomial p(x=3xsquare+2x+1,find the polynomial whose zeros are 1-alpha/1+alpha and 1-bita/1+bita

    asked by Anonymous on September 20, 2012
  12. urgent -plsee

    the cost of 6 cows are same as cost of 8 goats. if cost of 9 cows and twice numbered goats is rs. 9000, then find the cost of 3 cows and 6 goats?

    asked by Anahad on December 8, 2012
  13. Trigonometry

    if cos x=2/3 and x is in quadrant 4 find tan(x/2),sin(x/2),and cos(x/2) i got sin(x/2)=squr 1/6 tan(x/2)=squr 2/6 cos(x/2)=squr 5/6

    asked by Ryan on April 5, 2016
  14. Maths

    A horse and a cart together cost 1600.if the cost of the cart is one third the cost of the horse.find the cost of cart and horse sepretely

    asked by Shehzad on August 22, 2017
  15. Calculus

    If y=3/(sinx+cosx) , find dy/dx A. 3sinx-3cosx B. 3/(sinx+cosx)^2 C. -3/(sinx+cosx)^2 D. 3(cosx-sinx)/(sinx+cosx)^2 E. 3(sinx-cosx)/(1+2sinxcosx)

    asked by Anonymous on March 14, 2015
  16. Math

    If α and β are two angles in Quadrant II such that tan α= -1/2 and tan β = -2/3, find cos(α+β) Work: cos(α+β) = [ 1 - (tan α)(tan β) ] / [ 1 + (tan α)(tan β)] cos(α+β) = [ 1 - (-1/2)(-2/3) ] / [ 1 + (-1/2)(-2/3)] cos(α+β) = [ 1 - 1/3 ] / [

    asked by Sophie on June 9, 2009
  17. Math - Credits & finance charges

    On the May 1 billing date, Mary had a balance due of $970.60 on her credit card. The transactions during the following month were: May 5 Payment $400.00 May 10 Charge: airline tickets $381.00 May 22 Charge: hotel $270.60 May 25 Charge: florist $60.20 The

    asked by Sunny on March 10, 2008
  18. physics

    A cylindrical glass of radius r=3 cm is full of salt water of height h=10 cm with the water's refraction index changing linearly from the bottom n1=1.401 to the top n2=1.400. A flashlight is positioned so that light shines horizontally onto the glass. If

    asked by raj on February 21, 2013
  19. physics

    A block of mass M hangs from a rubber cord. The block is supported so that the cord is not stretched. The unstretched length of the cord is L0 and its mass is m, much less than M. The "spring constant" for the cord is k. The block is released and stops at

    asked by Stephen on December 1, 2009
  20. PreCalculus

    Problem 1.) Three friends want to share a circular 16-inch pizza equally by exactly only two parallel cuts. How far from the center must the cuts be? Hint: The pizza is a circle of radius 8 inches. Problem 2.) You are at the southernmost point of a

    asked by Jackie on March 24, 2015
  21. chemistry

    The figure shows a cube of air at pressure 1.0 atm above a hot surface on Earth. Contact with the hot surface causes the volume of the air to expand from 2.00 × 105 L to 2.20 × 105 L by the transfer of 8.2 × 106 J of heat. Assume the systems are

    asked by Morgan on January 31, 2015
  22. Math

    4.The following table shows the high and low temperatures predicted for Dallas during the week beginning Monday, August 29 2011. Which day has the biggest difference between the high and low temperatures? A.Mon D.Tue C.Wed D.Sun Monday High temp 106 Low

    asked by Jerald on September 16, 2013
  23. physics

    1. the pilot of a private plane flies 20km in a direction 60 degrees north of east,then 30km straight east,then 10km straight north.how far and in what direction is the plane from the starting point. 2. two forces acts on a point object as follows 100N at

    asked by oluwatoyin on October 30, 2011
  24. physics

    1. the pilot of a private plane flies 20km in a direction 60 degrees north of east,then 30km straight east,then 10km straight north.how far and in what direction is the plane from the starting point. 2. two forces acts on a point object as follows 100N at

    asked by oluwatoyin on October 30, 2011
  25. physics

    1. the pilot of a private plane flies 20km in a direction 60 degrees north of east,then 30km straight east,then 10km straight north.how far and in what direction is the plane from the starting point. 2. two forces acts on a point object as follows 100N at

    asked by oluwatoyin on October 30, 2011
  26. economics

    Two people enter a bus. Two adjacent cramped seats are free. Each person must decide whether to sit or stand. Sitting alone is more comfortable than sitting next to the other person, whihc is more comfortable than standing. a.) Suppose that each person

    asked by jo on October 21, 2010
  27. chemistry

    Titration of Vitamin C tablets Prior to titration, Vitamin C samples were dissolved in dilute sulfuric acid, treated with a 60mL portion of 0.3 M KIO3 and excess KI. Given equations: (1) ascorbic acid + I2 + 2H2O dehydroascorbic acid + 2I^- + 2H3O^+ (2)

    asked by mimi--PLEASE HELP VERY CONFUSED on November 23, 2009
  28. Calculus

    A construction company wants to build a rectangular enclosure with an area of 1000 square feet by fencing in three sides and using its office building as the fourth side. Your objective as supervising engineer is to design the enclosure so that it uses the

    asked by Joey on August 9, 2011
  29. physics

    please tell me if this is done correctly Find the final equlibirum temperature when 10.0 g of milk at 10.0 degrees C is added to 1.60 * 10^2 g of coffee with a temperature of 90.0 degrees C. Assume the specific heats of coffee and milk are the same as for

    asked by y912f on February 23, 2009
  30. Physics

    Two planes are about to drop an empty fuel tank. At the moment of release each plane has the same speed of 135 m/s, and each tank is at the same height of around 2.00km above the ground. Although the speeds are the same, the velocities are different at the

    asked by Anonymous on June 6, 2012
  31. finance

    Jiminy's Cricket Farm issued a 30-year, 7.2 percent semiannual bond 9 years ago. The bond currently sells for 85.5 percent of its face value. The book value of this debt issue is $107 million. In addition, the company has a second debt issue, a zero coupon

    asked by Sara on May 9, 2016
  32. Statustics

    A survey found that women’s heights are normally distributed with mean 63.4 in and standard deviation 2.5 in. A branch of the military requires women’s heights to be between 58 in and 80 in. a. Find the percentage of women meeting the height

    asked by Angie on August 4, 2014
  33. mojo

    A hydrogen atom is in its elevnth excited state, n = 12. Using the Bohr model of hydrogen, find the linear momentum. You want to solve for the electron velocity and multiply that by the electrn mass. There are many ways to do this. One would be to get the

    asked by physics on August 20, 2007
  34. math

    Sam received a $290 discount loan to purchase a stereo. The loan was offered at 16% for 90 days. Find the interest in dollars and the proceeds for the following problem. The interest is $12.60, $11.60, or $10.60 ? The proceeds are $279.40, $278.40, or

    asked by Kendra on January 26, 2010
  35. Algebra 1

    A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows: First period: 2, 4, 3, 1, 0, 2, 1, 3, 1, 4, 9, 2, 4, 3, 0

    asked by Peter on June 2, 2016
  36. algebra 1

    A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows: First period: 2, 4, 3, 1, 0, 2, 1, 3, 1, 4, 9, 2, 4, 3, 0

    asked by Peter on June 2, 2016
  37. History

    How did spices impact exploration efforts during the Age of Discovery the papacy ordered exploration efforts and crusades against eastern European nations that condoned cooking with Muslim spices asian sices are believed to cure ailments caused by the

    asked by malia on October 20, 2017
  38. English

    I urgently need you to check this part for me. Thank you very much for your cooperation. 1) I go on the internet every day to conduct research on various school subjects. I normally go on google as a search engine to find answers to my homework. 2) I

    asked by Henry2 on January 24, 2012
  39. calculus

    You are visiting your friend Fabio’s house. You find that, as a joke, he filled his swimming pool with Kool-Aid, which dissolved perfectly into the water. However, now that you want to swim, you must remove all of the Kool-Aid contaminated water. The

    asked by Sam on March 9, 2017
  40. Science Lab

    Ok I finish it today do yo think it's good. 1. First, Maria and her best friend Lexi are going to leave home at the same time & same place to go to school. 2. Next, Maria will go on the bus while Lexi is walking to school 3. Then, the girls will be doing

    asked by Laruen on October 9, 2011
  41. Math

    Hi y’all, me again. Can you help me on this? I got some answers, and I hope they are all right. Please let me know! Thanks! :) 1.2(y + 1) for y = 2 A. 6 B. 5 C. 7 D. 8 Is it “A”? 2. The cost in dollars of a school banquet is 74 + 12n, where n is the

    asked by Samantha on December 7, 2015
  42. math

    Hi y’all, me again. Can you help me on this? I got some answers, and I hope they are all right. Please let me know! Thanks! :) 1.2(y + 1) for y = 2 A. 6 B. 5 C. 7 D. 8 Is it “A”? 2. The cost in dollars of a school banquet is 74 + 12n, where n is the

    asked by Anonymous on November 30, 2017
  43. Math

    Use the formula S equals 2 left-parenthesis l w right-parenthesis plus 2 left-parenthesis l h right-parenthesis plus 2 left-parenthesis w h right-parenthesisto find the surface area of a rectangular prism with the following dimensions: length = 2 cm width

    asked by jay on April 11, 2019
  44. AP Physics

    15. A 3.0 kg block is pushed 3.0 m at a constant velocity up a vertical wall by a constant force applied at an angle of 30.0 with the horizontal, as shown in the figure. The acceleration of gravity is 9.81 m/s2. If the coefficient of kinetic friction

    asked by jeff on February 26, 2011
  45. Chemistry

    Calculate the molar extinction coefficients for carotene and chlorophyll using the peaks of highest absorption and Beer’s law.Show your calculations.basically solve for e A = ebc Carotene (Yellow) = Highest peak 450 nm and 0.455 absorption A = ebc 0.455

    asked by John on February 15, 2015
  46. physics

    PART ONE: A charge of 4.70μC is at the origin and a second charge of −2.85μC is on the positive x-axis 1.08 m from the origin. Find the magnitude of the electric field at a point P on the y-axis 0.640 m from the origin. The value of the Coulomb

    asked by Danny on February 26, 2015
  47. Math - Game Theory

    Suppose that a decision-maker's preferences can be represented by the expected value of a utility function u. Find another utility function u' whose expected value represents the decision-maker's preferences and assigns a payoff of 1 to the best outcome

    asked by sean on February 19, 2011
  48. Math

    There are 20 question in a quiz. 5 marks will be given for a correct answer. 1 mark will be deducted for a blank answer and 3 marks will be deducted for a wrong answer. (a) Peter gives 2 blank answers and he gets 72 marks. Find the number of correct

    asked by lottice on January 22, 2015
  49. Calculus

    Find the functions a) f o g, b) g o f, c) f o f, d) g o g, and their domains. f(x)= square root of x, g(x)= cube root of 1-x These are my answers, but I am not sure about them and I only figured out one domain... that is the part that really confuses me.

    asked by Chelsea on September 19, 2010
  50. algebra

    The velocity of a blood corpuscle in a vessel depends on how far the corpuscle is from the center of the vessel. Let R be the constant radius of the vessel; Vm, the constant maximum velocity of the corpuscle; r, the distance from the center to a particular

    asked by Sella on August 11, 2012
  51. Calc

    Find the functions a) f o g, b) g o f, c) f o f, d) g o g, and their domains. f(x)= square root of x, g(x)= cube root of 1-x These are my answers, but I am not sure about them and I only figured out one domain... that is the part that really confuses me.

    asked by Chelsea on September 20, 2010
  52. plz plz plz help me with this problem!

    A consumer at a bread factory would like to know if there are differences (gender) in bread preferences. Forty adults were randomly selected and asked the following questions: Which type of bread do you prefer? They were instructed to only pick one bread

    asked by malia on December 13, 2011
  53. Math- Really need help!

    A consumer at a bread factory would like to know if there are differences (gender) in bread preferences. Forty adults were randomly selected and asked the following questions: Which type of bread do you prefer? They were instructed to only pick one bread

    asked by Malia on December 13, 2011
  54. statistics

    A consumer at a bread factory would like to know if there are differences (gender) in bread preferences. Forty adults were randomly selected and asked the following questions: Which type of bread do you prefer? They were instructed to only pick one bread

    asked by Malia on December 13, 2011
  55. Geometry Honors

    On the bridge of a ship at sea, the captain asked the new, young officer standing next to him to determine the distance to the horizon. The officer took pencil and paper, and in a few moments came up with an answer. On the paper he had written the formula

    asked by Ryan on April 13, 2016
  56. science help

    A scientist plans to find out the percent of teenagers who like science. She interviews 500 teenagers leaving a science museum and finds that 450 of them like science. The scientist concludes that 90 percent of teenagers like science. Why is the

    asked by Oscar on February 23, 2016
  57. Algebra

    An Algebra I test contains 30 questions. Some of the questions are worth 4 points each, and some are worth 2 points each. The total test is worth 100 points. Let f represent the number of questions worth 4 points and t, the number of questions worth 2

    asked by lol on June 10, 2013
  58. physica

    Consider the rods plus disc system shown in the Figure. The rods are identical. They have a length L =0.50 m, and mass M = 0.250kg. The disc has a radius of R = 0.130m and mass m=0.750kg. Both rods are glued to the disk as shown with X = 0.25m. The system

    asked by Serena on October 28, 2014
  59. English

    Please let me know what you think? I have the 1st three paragraph Imagine being ripped from the bed by several strangers, blindfolded, handcuffed and thrown into the back of a car, sometime later a plane, and then a small boat. Willie awakes very druggy,

    asked by lizzie on August 8, 2011
  60. Physics

    A block of mass m is attached to a string and suspended inside an otherwise empty box of mass M. The box rests on a scale that measures the system’s weight. (a) If the string breaks, does the reading on the scale change? Explain your reasoning. (b)

    asked by Lynda on September 29, 2010
  61. Chemistry

    A 2B + C at a certain temperature the equilibrium pressure of the system is 0.318atm. Determine Kp for this reaction. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2B + C = 0.318atm /3 = 0.106 CO2 = 0.106 atm NH3 = 2(1.06) atm =0.212 atm Kp = PNH3 ^2 x PCO2 kp

    asked by Tri on October 8, 2008
  62. physical

    You are playing a note that has a fundamental frequency of 466.16 Hz on a guitar string of length 59.9 cm. At the same time, your friend plays a fundamental note on an open organ pipe, and 4.0 beats per seconds are heard. The mass per unit length of the

    asked by itufizik on July 16, 2012
  63. math

    A pottery factory needs to connect with the main gas pipe line. This pipeline is on the other side of a stream. A gas line must be run from the main line junction to the factory at the lowest possible cost. It costs $12.50 per foot to run pipe under water

    asked by Jake on December 22, 2009
  64. Physics

    In Larry Niven’s science fiction novel Ringworld, a ring of material of radius 1.54 × 1011 m rotates about a star with a ro- tational speed of 1.38 × 106 m/s. The inhab- itants of this ring world experience a normal contact force ~n. Acting alone, this

    asked by helpplz on November 17, 2012
  65. CHEMISTRY

    If 142.38 g of l water at 21.7 degrees C is placed into a syrofoam cup with 174.36 g of ice at -27.5 degrees C what would be the final temperature of the entire contents at equilibrium? If it is partially frozen, how many g of the ice has melted? given

    asked by Jake on October 14, 2007
  66. management decision making

    Analyze and compare both data sets using the data analysis and biases concepts from Chapter 11 of Sekaran & Bougie (2010). Compare only those categories that you find are significant to your analysis in demonstrating whether the US demographics based

    asked by kathy on July 31, 2012
  67. Physics

    A missile launcher, mass M, at rest on a horizontal track fires a missile, mass m, horizontally. a) If the launch speed of the missile is v o , what (effective) coefficient of (kinetic) friction is required in order to stop the launcher within x meters?

    asked by Chad on August 7, 2012
  68. Math

    In an isosceles triangle, the perimeter is 8 more than 2 times on of the legs. If the perimeter is 28 in, find the length of the base. A. 16 in B. 18 in C. 10 in D. 8 in Given triangle ABC with A(-3, 2), B(-1, -4), and C(4, 1), write the equation for the

    asked by SkatingDJ on January 14, 2016
  69. Mensuration maths

    An open (hollow) cylindrical barrel has a base radius 14 cm and a height of 33cm A) find the volume and the surface area of the barrel. B) if a fly is at the point on the bottom inner rim of the barrel, how much distance (minimum) will it have to travel to

    asked by Neelam on July 9, 2017
  70. Physics

    A missile launcher, mass M, at rest on a horizontal track fires a missile, mass m, horizontally. a) If the launch speed of the missile is v o , what (effective) coefficient of (kinetic) friction is required in order to stop the launcher within x meters?

    asked by Chad on August 8, 2012
  71. Physics help!!

    A crate is pulled to the right with a force of 80 N, to the left with a force of 125.8 N, upward with a force of 615.4 N, and downward with a force of 248 N. Net external force in the x direction: -45.8 Net external force in the y direction: 367.4 N how do

    asked by Elle on November 11, 2011
  72. polynomial functioms-check

    Can you please check my work and answers. Find the x-intercepts of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. 1.f(x) = (x + 1)(x - 3)(x - 1)^2 -I got -1 crosses the

    asked by Jesse on October 15, 2007
  73. Maths

    In a survey of 200 students of a school, it was found that 60% study mathematics, 45% study physics, 35% study chemistry, 20% study mathematics and physics, 15% study physics and chemistry, 25% study chemistry and mathematics and 10% none of these

    asked by Sabah on September 1, 2015
  74. calculus

    2. The rate of change in the number of bacteria in a culture is proportional to the number present. In a certain laboratory experiment, a culture has 10,000 bacterial initially, 20,000 bacteria at time t1 minutes, and 100,000 bacteria at (t1 + 10) minutes.

    asked by naseba on March 30, 2012
  75. physics

    A person is standning on the end of a diving board as shown. The diving board is held in place by two supports. The person has a mass of 60 kg. The diving board has a mass of 30 kg. The supports are 1.5m away from eachother. The diving board is 4m long,

    asked by Anonymous on November 4, 2007
  76. game theory

    Consider the following game. Player 2 L R U 6, 1 ........8, 3 Player 1 UM 4, 9........8, 4 DM 7, 2 ............6, 9 D 5, 4...........9, 3 (a) Is there a mixed strategy Nash equilibrium in which player 1 is placing positive probability only to strategies DM

    asked by Desperate on February 14, 2011
  77. tech cheack answers plz

    1.) Which of the following is the best strategy for studying test? a) Sitting alone in a chair in a quiet room, looking over your textbook. b) Working in pairs and exchanging practice questions. c) Developing a personal method that is right for you and

    asked by techr on January 29, 2015
  78. Languge...Grammar

    Is "Although They" in the following sentence a Prepositional Phrase? Thank You They tried, although they didn't expect to win. No. "Although" is a conjunction linking two independent clauses. "They" is the subject of the second clause. Can you tell me

    asked by Mandi on July 4, 2007
  79. Criminal Justice/Terrorism

    You are a first responder to a suspected terrorist incident. As you arrive, a sniper shoots two firefighters. You then see a suspicious-looking man, with Middle Eastern features, leaving the scene. Later, while helping victims, you find a spent rifle shell

    asked by Pat on July 12, 2015
  80. physics

    A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 94.0 kg. The mass of the rock is 0.350 kg. Initially the wagon is rolling forward at a

    asked by Sam on October 22, 2011
  81. Equilibrium

    The following reaction has an equilibrium constant (Keq) of 160. 2 NO2(g) 2 NO(g) + O2(g) What will be the reaction quotient (Q) and in which direction will the reaction proceed if the partial pressure of NO2 is 5.0*10^-4 atm, NO is 0.080 atm, and O2 is

    asked by Tyler on August 3, 2015
  82. physics

    In this problem you will determine the average velocity of a moving object from the graph of its position as a function of time . A traveling object might move at different speeds and in different directions during an interval of time, but if we ask at

    asked by Bre on January 30, 2011
  83. Chem 104

    From M1V1=M2V2 the volume of the KHP solution the molarity of the titrant and the volume of the titrant, find the molarity of the KHP solution . The KOH solution is the titrant since it is used to titrate the KHP solution. KHP mass-204.2 Mass per liter in

    asked by Hannah Marie on November 10, 2016
  84. math

    An objective function and a system of linear inequalities representing constraints are given. Graph the system of inequalities representing the constraints. Find the value of the objective function at each corner of the graphed region. Use these values to

    asked by ReRe on February 22, 2010
  85. statistics

    When Trevor and Brian play ping pong, the probability that Trevor will win is 0.6. If Trevor and Brian play two games of ping pong, find the probability that Trevor wins the first game and Brian wins the second. Assume games are independent. Give your

    asked by Anonymous on October 16, 2013
  86. Calculus

    Two ants, red ant and black ant, creeping along lines in 3-space. At time t, red ant is at point on the line x=3-t , y-2=2t , z-2t=6 and at the same time t, black ant is at the point on the line 2x=t , y-3t=2 , z=2+t a) Find the starting distance between

    asked by Muhammad on November 11, 2016
  87. physics

    Two particles are moving along the x axis. Particle 1 has a mass m1 and a velocity v1 = +4.3 m/s. Particle 2 has a mass m2 and a velocity v2 = -6.3 m/s. The velocity of the center of mass of these two particles is zero. In other words, the center of mass

    asked by Tyler on January 19, 2017
  88. Physics

    A pirate starts at point A, takes 54 paces due west, turns and takes 34 paces due south, then turns again and takes 12 paces due East to find a buried treasure. How many paces from the buried treasure is point A?

    asked by Simran on November 2, 2018
  89. physics

    A fire hose can fill a certain tank with water during 1 hour. A 2nd fire hose can fill the same tank in half hour. A 3rd fire hose can fill the same tank in quarter hour. find the time necessary to fill the same tank by the 3 fire hoses together

    asked by amal on November 30, 2011
  90. chemistry

    A mixture of 0.2 moles of alcohol A and 0.5 moles of alcohol B has a total vapour pressure of 40 mmHg at 297 K. If the mixture obeys Raoult's law, find the vapour pressure of pure B at 297 K given that the pressure of a pure A is 20 mmHg at 297 K.

    asked by jay on April 5, 2016
  91. Ratios

    A group of students surveyed chose baseball and soccer as their favorite sport in the ratio 3 to 8 if 56 students chose soccer as their favorite sport find the number of students that shows baseball is the favorite sport 132 students were surveyed

    asked by Emily on January 3, 2018
  92. History

    1)How did enlistment in the Canadian military change between first world war and second world war? What changed? I have a few points but I can't think of any more 2)how has the Canadian military changed from the second world war? Research the the inclusion

    asked by Al on May 23, 2014
  93. DR BOB - Chemistry Question 4 a - d

    a. State the atomic number of ununhexium and give the full symbol for the isotope ununhexium. b. Give the period and the group of the periodic table in which you would expect to find ununhexium, explaining how you arrived at your conclusions. Further name

    asked by Mark jones on February 17, 2007
  94. overview of teaching techniques

    which of the following guidelines should be followed when giving directions to students? (a)dont allow students to choose the activity make all decisions yourself (b)require students to find their own background information and necessary materials (c)pemit

    asked by susue on August 25, 2011
  95. Foreign Language, How to use a dictionary.,

    First of all purchasing a good English/X and X/English dictionary is an investment in your future. For "generic" purposes X represents any foreign language (French, Spanish, Japanese, etc.) Here is the "key" to using a dictionary for a vocabulary

    asked by SraJMcGin on May 8, 2007
  96. Algebra 1

    1). The absolute value of 2x + 4 = 0 A: -2 2). A volunteer at the zoo is responsible for feeding the animals in 15 exhibits in the reptile house. This represents 20% of the total exhibits in the reptile house. How many many exhibits are in the reptile

    asked by Anonymous on October 7, 2013
  97. algebra

    Can you explain this? An intercept of the quadratic graph is the same as the root of quadratic equation. You have to find out the discriminant. If the discriminant is positive, you have two roots which equals two intercepts. If it is zero, there is one

    asked by Anonymous on June 17, 2015
  98. Maths

    The Sentosa High School's telephone number is an eight digit number. The sum of the two numbers formed from the first three digits and the last five digits respectively 66558. The sum of two numbers formed from the first five digits and the last three

    asked by Surya on February 23, 2012
  99. Physics

    A small block on a frictionless horizontal surface has a mass of 2.50×10−2 Kg. It is attached to a massless cord passing through a hole in the surface. The block is originally revolving at a distance of 0.300 m from the hole with an angular speed of

    asked by Sarah on June 25, 2009
  100. Physics

    As seen from above, a playground carousel is rotating counterclockwise about its center on frictionless bearings. A person standing still on the ground grabs onto one of the bars on the carousel very close to its outer edge and climbs aboard. Thus, this

    asked by Sam on November 3, 2012

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