1. Maths B

    The running costs of a particular factory consist of two components – a constant charge per week for rent of premises and a variable cost for labour which depends on the number of staff working in the factory in that particular week. The total weekly

    asked by Z on March 1, 2017
  2. chem

    what are the normal freezing points and boiling points of the following solutions: a. 21.1g NaCl in 135mL of water b. 15.4g urea in 66.7 mL water?

    asked by paul on January 12, 2011
  3. Read Y9 chemistry and go upwards

    3. Copper carbonate turns black when it is heated and the mass decreases. What is the normal colour of copper carbonate?

    asked by Moira on September 10, 2008
  4. STAT 250..Help!

    What is the probability of randomly selecting a z-score less than z = –0.80 from a normal distribution? a)-0.2119 b)0.7881 c)0.2119 d)-0.7881

    asked by Jane Segurra on March 21, 2013
  5. Mathematics

    Using quotient rule find dy/dx of: y=(4+x)/(cos(x)) and find the equation of the normal to the curve y=(4+x)/(cos(x)) at the pint where x=0 Use y=mx+c form

    asked by Joe on December 14, 2015
  6. Statistics

    True or False If a sample of at least 30 scores is randomly selected from a normal population, the sample mean will be equal to the population mean.

    asked by Lyndyc on December 10, 2013
  7. Physics

    An object with a weight of 30 newtons is placed on a flat, level surface. What is the normal force that the surface pushes on the object with?

    asked by Olivia on November 15, 2012
  8. math

    I have the point slope equation of a line as y-500=(-4/3)x+(188/3) how would i convert this equation into the normal form of a line?

    asked by kelly on April 20, 2009
  9. Statistics

    a normal distribution ha am ean of 80 with a standard deviation of 20. what score separates the highest 15% of the distribution from the rest of the score?

    asked by Leigh on October 1, 2010
  10. Statistics 250

    What is the probability of randomly selecting a z-score less than z = –0.80 from a normal distribution. a)-0.2119 b)0.7881 c)0.2119 d)-0.7881

    asked by Jane Segurra on March 21, 2013
  11. chem

    what are the normal freezing points and boiling points of the following solutions: a. 21.1g NaCl in 135mL of water b. 15.4g urea in 66.7 mL water?

    asked by paul on January 12, 2011
  12. chemistry

    If the vapor pressure of a liquid is 0.850 atm at 20°C and 0.897 atm at 25°C, what is the normal boiling point of the liquid?

    asked by Elisha on January 20, 2016
  13. Physics

    A 55 kg skier rests on a hill that has an angle of 25° to the horizontal. What is the magnitude of the normal force the hill exerts on the skier?

    asked by Dawn on December 15, 2010
  14. Math

    10cm 3cute of normal specimen of human blood contains 1.2g of hemoglobin how many grams does 18cm 3cute of the same blood contain? Please help!

    asked by Delores on July 30, 2010
  15. Statistics

    Find z such that 44.0% of the standard normal curve lies to the left of z. 0.151 -0.772 -0.151 -1.519 1.519

    asked by Alex on June 20, 2010
  16. physical science

    A train sounding its horn is approaching an observer. The pitch of the horn's sound relative to its normal pitch is???

    asked by ali on July 25, 2012
  17. College Abstract Algebra

    If H is a subgroup of G and K is a normal subgroup of G,prove that HK = KH

    asked by Jackie on September 29, 2011
  18. math

    If H is a subgroup of G, and K is a normal subgroup of G, prove that: HK = KH

    asked by Jackie on October 14, 2011
  19. statistics

    a.A normal distribution is any distribution that is not unusual

    asked by Mercede on May 3, 2010
  20. calculus

    If g(1) = 4 and g¢ (1) = − 2, find f ¢ (1), where f(x) = x2 ln (g(x)). Also find the equation of the normal to f at x = 1.

    asked by ak on October 19, 2011
  21. Algebra 2

    Adding 1 to which digit will increase 736,419 by ten thousand? i think is 3... bill has four more dimes than nickels, and seven fewer nickels than pennies.he has a total of $3.35. how many of each kind of coin has he? bill has four more dimes than nickels,

    asked by Ron on November 2, 2006
  22. physics

    Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 95.0 kg, down a θ = 50.0° slope at constant speed. The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done by friction as the sled moves

    asked by Karina on July 9, 2015
  23. !!MATH!!

    A decroative floor pattern has one red square tile surrounded by 12 blue tiles. Write and evaluate an expression to show how many total tiles (red and blue) are needed if there are 15 red tiles. Then make a table showing the total number of tiles if there

    asked by JACKY on September 30, 2011
  24. material science

    A uniform compressive stress σz is applied to the surface of the metal alloy, and it may be assumed that there is no friction between the alloy and the die. This aluminum alloy has Young’s modulus E=70GPa and a Poisson’s ratio ν=0.33. Determine the

    asked by karthik on November 20, 2016
  25. Chemistry

    non-volatile means a liquid that won't evaporate at all. It's not a commomly encountered term because there is usually some evaporation (especially as heat is applied). The usual phrase is "very low volatility". Oil at room temperature or colder fits this

    asked by Lance on January 24, 2007
  26. Algebra HELP

    I am resubmitting this in hopes that someone may point me in the right direction...... When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of $5,000. Refer to the table below and answer the

    asked by Anonymous on May 23, 2008
  27. chemistry

    Inglês Português Espanhol For the determination of the quantity of chloride in a physiological serum sample by the Volhard method, a sample of 25.00 ml was treated with 50.00 ml of 0.110 mol/L Silver nitrate solution and the excess of silver ions was

    asked by william on October 4, 2017
  28. math

    angle ABC and DEF are supplementary angles. the measure of DEF is 20 degrees less than 3 times the amount of ABC. what are ABC and DEF.

    asked by hunter on January 25, 2013
  29. Maths Percentage

    (1)Raghu has some apple. He sold 40% more than he ate. If he sold 70 apples, how many did he ate? (2)A man gives 10% of his money to his children and 20% of the remaining to trust.If he is still left Rs 9600, what did he originally have? (3)A boy remains

    asked by Ashmitt on September 12, 2016
  30. algebra

    a train travels 600 miles from Los Angles to San Francisco traveling at a certain speed the return trip is made traveling 40 mph faster the return time is 4 less how fast was the train traveling in each direction?

    asked by jon on October 19, 2014
  31. physics

    A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 8.55×10−23 and 5.33×10−23 , respectively. What is the magnitude of the momentum of the

    asked by Cara on April 13, 2011
  32. Algebra

    LS 154. Find the measure of angle x. Identify the two angles that form the larger angle. 2 Write a subtraction equation. Subtract to find the measure of x. The measure of x

    asked by Isabella on March 2, 2017
  33. Algebra

    LS 154. Find the measure of angle x. Identify the two angles that form the larger angle. 2 Write a subtraction equation. Subtract to find the measure of x. The measure of x

    asked by Isabella on March 1, 2017
  34. Trigonometry

    The angles of elevation of an office building as observed from the top and ground level of a 10 meters tall residential building are 68° and 72° respectively. How tall is the office building? How far apart are the two buildings?

    asked by Kate on July 18, 2015
  35. Random

    A room has five corners, one of the five has an angle is 179 degrees what would be the measure meant of the other angle if the sum of two of the unknown angles is 60 and the sum of the other two is 3 less than the sum of the first two. my first question

    asked by Alex on May 9, 2017
  36. Exterior angle what am I doing wrong?

    Find the measure of the indicated exterior angle. Exterior angle is: 197-5n Two interior angles are: 5n+21 and n+11 I set it up as: 197-5n=5n+21+n+11 197-5n=6n+32 165=11n but this does not make sense.

    asked by bart on May 16, 2010
  37. Science

    In the following diagram, the greem ball changes direction after colliding with the red ball because the red ball has more momentum. True

    asked by Check my answers pls on March 7, 2014
  38. math

    Solve. The total sales made by a salesperson were $25,000 after 3, months and $68000 after 23 months. Predict the total sales after 42 months. 25000=3months 68000=23 months x=42 months how do I do this?

    asked by rmz on February 22, 2010
  39. Math--Statistics

    I have a couple of questions that need review--I've answered them, but I'm not sure if I'm correct. 1.)Suppose you interview 10 randomly selected workers and ask how many miles they commute to work. You'll compute the sample mean commute distance. Now

    asked by Anonymous on March 15, 2011
  40. Biology

    Hi, I am trying to work out a hypothesis to compare Estrogen receptors in breast cancer cells to normal breast tissues. Am I right in thinking that this will be a hypothesis using "effect" words instead of association ?

    asked by Yvonne on April 1, 2017
  41. Physics

    A Simple Astronomical Telescope In Normal Adjustment Has An Objective Of Focal Length 100cm And An Eye Piece Of Focal Length 5cm What Is The Angular Magnification (a) 20 (b) 25 (c) 1/20 (d) 1/25

    asked by Godwin on February 15, 2017
  42. Physics

    A Simple Astronomical Telescope In Normal Adjustment Has An Objective Of Focal Length 100cm And An Eye Piece Of Focal Length 5cm What Is The Angular Magnification

    asked by Godwin John on February 15, 2017
  43. statistics

    The average time to sew a pair of pants is 4.2 hours with a standard deviation of 30 minutes and if the distribution is normal then the probability of a worker finishing the pants in less than 3 hours is.

    asked by bill on November 16, 2010
  44. math

    The weights of extra large eggs have a normal distribution with a mean of one ounce and a standard deviation of 0.1 ounces. The probability that a dozen eggs weighs more than 13 ounces is closest to...?

    asked by Hannah on February 6, 2008
  45. Statistics

    The lifetime of a 2-volt non-rechargeable battery in contant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than ?

    asked by Karen on September 2, 2009
  46. physics

    The x coordinate of the center of gravity of this horse is 1/4 of the way from his front legs (at left) to his rear legs (at right). His weight is W. What is the normal force exerted by the ground on each of his two front hooves?

    asked by Frustrated on December 11, 2012
  47. Statistics

    The lifetime of a 2-volt non-rechargeable battery in contant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than ?

    asked by Karen on September 2, 2009
  48. Phys

    A car of mass 1200kg is moving on a road at the speed of 60km/hr.if coefficient of friction is 38, and Normal force is 50N. The frictional force acting on the car is given by

    asked by Phy on November 8, 2017
  49. statistics

    A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores 1) Below 20 2) Above 40 3) Above 20

    asked by Brady on September 30, 2011
  50. math

    Angelo is paid double time for each hour he works over 40 hours in a week. Last week he worked 42 hours and earned $660. What is his normal hourly rate?

    asked by matt on September 1, 2011
  51. statistics

    1) A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores below 20?

    asked by Mich on September 28, 2011
  52. math

    Angelo is paid double time for each hour he works over 40 hours in a week. Last week he worked 46 hours and earned $520. What is his normal hourly rate?

    asked by amber on February 5, 2011
  53. Math

    In Exercises 1–6, describe the misuse or misinterpretation of statistics that may be involved: Over 60% of the people who fly to Normal, Illinois, do so on American Airlines. Hence, most people prefer American to any other airline.

    asked by Anonymous on July 29, 2009
  54. STAT

    Assume that women’s heights are normally distributed with a mean given by µ = 64.6 inches and standard deviation given by σ = 2.2 inches. What area under the normal curve corresponds to the probability that a woman’s height is between 63.7 inches and

    asked by Jacky on October 12, 2013
  55. math

    Angelo is paid double time for each hour he works over 40 hours in a week. Last week he worked 42 hours and earned $484. What is his normal hourly rate?

    asked by Kelsey on August 29, 2013
  56. chem

    What is the density of an aqueous solution of potassium nitrate, that has a normal boiling point of 103.0 degrees Celsius, and an osmotic pressure of 122 at 25 degrees Celsius?

    asked by hadi on December 14, 2015
  57. statistics

    The lifetime of a 2-volt non-rechargeable battery in constant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than

    asked by Anonymous on May 31, 2013
  58. maths

    A brick wall is built by using 2 bricks less in each layer than in the previous one. The wall has m layers and in total 21m+40 bricks are used. If the top layer has only 4 bricks, determine:A) the value of m b) the total number of bricks in the wall

    asked by Anonymous on February 21, 2010
  59. Math

    Gray bought two plots of land for a total of 120000 on the first plot she made a profit of 15% on the second plot she made 10% profit her total profit 5500, how much did she pay for each piece of land?

    asked by Solve this math if possible on October 18, 2013
  60. Math Word Problem

    Each course at college X is worth either 3 or 4 credits. The members of the​ men's swim team are taking a total of 52 courses that are worth a total of 169 credits. How many 3​-credit courses and how many 4​-credit courses are being​ taken?

    asked by Soora on February 27, 2016
  61. mathematics

    he dimensions of a rectangular prism are (5x squared - 4x - 3) (x squared - x + 1) cm by (3x squared - 5) cm. Find a polynomial which represents 1. the total surface are of the prism. 2. the total length of the edges of the rectangular prism 3. the volume

    asked by alexis on January 14, 2015
  62. math

    An investment of $2500 is made at an annual interest rate of 5.5% .How much additional money must be invested at an annual simple interest rate of 8% so that the total interest earned is 7% of the total investment?

    asked by Marcela Minoza on September 3, 2012
  63. Math

    γ is a permutation on eight elements, though you are not told which permutation it is. If γ is applied to an 8-element set, what is the minimum number of additional timeswe must apply γ to the resulting set in order to guarantee the set is back in its

    asked by Bob on June 18, 2013
  64. physics

    Two 100 kg ball are mounted on a seesaw and seesaw is in balanced position and balls can move freely on the surface.How much force I should applied on the right arm of seesaw so that the left side ball could jump up to 5 centimeter in the Air.

    asked by vikram on April 28, 2017
  65. physics

    A uniform disk with a mass of 27.3 kg and a radius of 0.309 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk, as the drawing indicates. (a) What is the net torque produced by the two forces? (b) What is the

    asked by Sami on November 2, 2011
  66. western michigan university

    1050 calories of heat from soybean oil was applied to a 250 gram sample of liquid water with an initial temperature of 25 degrees Celsius. Determine (a) the final temperature of water and (b) the change in temperature.

    asked by lorena on December 7, 2012
  67. Math

    γ is a permutation on eight elements, though you are not told which permutation it is. If γ is applied to an 8-element set, what is the minimum number of additional times we must apply γ to the resulting set in order to guarantee the set is back in its

    asked by Dan on June 18, 2013
  68. physics

    A 0.580-kg ball is dropped from rest at a point 1.60 m above the floor. The ball rebounds straight upward to a height of 0.650 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?

    asked by Anonymous on January 13, 2015
  69. Physics

    A 1000kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest uniformly in a distance of 150 m. What is the magnitude applied to the car to bring it to rest?

    asked by Anonymous on March 12, 2016
  70. Physics

    A 0.400-kg ball is dropped from rest at a point 1.80 m above the floor. The ball rebounds straight upward to a height of 0.730 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?

    asked by Sarah on October 14, 2010
  71. physics

    TWO BLOCKS a AND b ARE CONNECTED BY A HEAVY ROPE OF MASS 2kg THE MASSES OF a AND b ARE 10 AND 5kg RESPECTIVELY.IF AN UPWARD FORCE OF 200N IS APPLIED TO THE TOP ROPE A:FIND THE ACCELERATION OF THE SYSTEM B:WHAT IS THE TENTION AT POINT P1 AND P2 ON THE HEAVY

    asked by Fonde on January 13, 2012
  72. physics

    Two blocks m1 = 9.1 kg and m2 = 5.6 kg are connected by a homogeneous rope that has a mass of mr = 1.50 kg. A constant vertical force, F = 193.0 N, is applied to the upper block. What is the magnitude of the acceleration of the system?What is the magnitude

    asked by jameson on September 23, 2012
  73. Statistics

    In a survey, the guess at the mean age for the class had a mean of 21.9 and a standard deviation of 3.03. Given that Normally distributed populations have a first quartile of Z=-0.67 and a third quartile of Z=.67, what does this suggest about whether or

    asked by david on July 14, 2011
  74. Math

    γ is a permutation on eight elements, though you are not told which permutation it is. If γ is applied to an 8-element set, what is the minimum number of additional times we must apply γ to the resulting set in order to guarantee the set is back in its

    asked by best on June 19, 2013
  75. optimization

    The manager of a large apartment complex knows from experience that 110 units will be occupied if the rent is 322 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 7 dollar increase in rent.

    asked by Jane on April 20, 2011
  76. Algebra

    How can algebra be used to solve this problem? The boy solved 10 problems correctly at 8 cents a problem for a total of 80 cents, and 16 incorrectly at the cost of 5 cents for a total of 80 cents. Therefore, neither the boy nor his father owed each other

    asked by Kate on June 22, 2009
  77. algebra

    In a triangle ABC , angle B is 4 times angle A and angle C is 17 degrees less than 5 times angle A. Find the size of the angles.

    asked by Sam on September 21, 2010
  78. math

    In a triangle ABC,angle B is 3 times angle A and angle C is 5 degrees less than 6 times angle A. Find the size of the angles.

    asked by Anonymous on September 18, 2010
  79. math

    if the measure of the angles of a traingle are represented by 2x, 3x-15, and 7x+15, the traingle is 1 an isosceles triangle 2 a right triangle 3 an acute triangle 4 an equilateral triangle

    asked by Anonymous on May 8, 2009
  80. Algebra

    In a triangle ABC, angle B is three times angle A and angle C is 5 degrees less than 6 times angle A. Find the size of the angles.

    asked by Dora on March 10, 2010
  81. ssc

    one diagonal of a parallelogram is 16.5. it makes angles of 36 degrees 10 minutes and 14 degrees and 30 minutes respectively with the sides. find the sides

    asked by cris sept on September 25, 2014
  82. math

    In an isosceles triangle, the perimeter is 75 cm and one of the sides is 25 cm. Find all its sides. Can you find all angles of the triangle? Explain your answer.

    asked by maria on January 28, 2017
  83. math

    A taxi ride costs $3 plus $2.50 per mile. Write and graph an equation in two variables that represents the total cost of a taxi ride. Let mm represent number of miles and cc represent the total cost (in dollars) of the taxi ride.

    asked by Anonymous on March 21, 2018
  84. math

    Kendra deposited a total of $9,000 between two saving accounts bearing simple interest. One of the accounts has an interest rate of 3% while the other rate is 4%. If the total interest earned after one year is $320, find the amount deposited into each of

    asked by seb on August 6, 2016
  85. math

    you find a sales receipt from a store that shows the total price as $40, and the total amount paid including sales tax as $42. a. Write an equation you can use to find the sales tax rate r. b. Can you use r to find the percent for the sales tax?

    asked by robin on February 13, 2018
  86. Physics

    Just as no mechanical device can be 100% efficient, no heat engine can transfer 100% of its heat to a single object. Some of the heat energy must be wasted (released into the environment). We have a heat engine that produces 150 J of heat, does 40 J of

    asked by Jessica on December 7, 2016
  87. arithmetic

    1. The first and last term of an A.P are, a and l respectively, show that the sum of nth term from the beginning and nth term from the end is a + l. 2. If mth term of an A.P be 1/n and nth term be 1/m, then show that its mnth term is 1. 3. The sum of four

    asked by kartik hans on May 24, 2014
  88. Urgent Science~!

    Carla applied a force of 35 N to a wheelbarrow full of bricks and moved it 2.5 m. Which of the following can be determined from this information? The wheelbarrow supplied 87.5 J of work. The wheelbarrow has a mechanical advantage of 14.*** The wheelbarrow

    asked by Gabby on December 10, 2013
  89. Accounting for Managers

    Question 1 of 20 5.0 Points Which of the following products probably would be manufactured using a job order costing system? A. Paper B. Baseball cards C. Computer monitors D. Company business cards Reset Selection Mark for Review What's This? Question 2

    asked by Blu on September 5, 2012
  90. comptuer programming

    i need help with my code i keep comin up with errors in basic Dim Firstname as string Dim Lastname as string Dim Empnum As Integer Dim HourRate As Integer Dim Hours As Integer Dim Tools As Integer Dim Total As Integer Dim Netpay As Integer Dim Taxes As

    asked by farmer on June 4, 2013
  91. arithmetic

    1. The first and last term of an A.P are, a and l respectively, show that the sum of nth term from the beginning and nth term from the end is a + l. 2. If mth term of an A.P be 1/n and nth term be 1/m, then show that its mnth term is 1. 3. The sum of four

    asked by kartik hans on May 23, 2014
  92. chemistry

    A student generates H2(g) over water using the reaction between zinc and hydrochloric acid Zn(s)+ 2HCl(aq)---> ZnCl2(aq)+ H2(g) Data: Mass of vial and zinc 15.5082 mass of vial 15.3972 mass of zinc 0.111 final burette reading 45.30mL barometric pressure:

    asked by Yuli on November 24, 2011
  93. Environmental Studies

    Buell (2004: 110) suggests that "people have entered a world in which the robust exercise of their power to modify nature has made their past actions increasingly into their present fate-or, better, not just their present fate, but the fate of all life

    asked by Kjd on October 15, 2012
  94. physics

    In 2003, New Zealand households consumed a total of 153.6E+15 J of energy (the largest amount of any sector in the New Zealand economy). How many days would it take for the sun to put that amount of energy onto a region 20.0 km by 20.0 km (0.15 percent of

    asked by steve on May 18, 2010
  95. Chemistry(Please Respond)

    Willsomeone, please check my answers? (

    asked by Anonymous on June 21, 2012
  96. math

    Three authors team up to write a childrens book. The publisher pays them according to the following contracts Author - Fixed Rate - Royalty Patricia $3000 - 1n Stephan - $1500 - 2n Harlan - $1000 - 3n Find a simplified expression that represents the total

    asked by dylan on October 27, 2009
  97. math

    Three authors team up to write a childrens book. The publisher pays them according to the following contracts Author - Fixed Rate - Royalty Patricia $3000 - 1n Stephan - $1500 - 2n Harlan - $1000 - 3n Find a simplified expression that represents the total

    asked by dylan on October 27, 2009
  98. math

    Find the sales tax rate in your area. Using this tax rate, write a linear equation representing the total with tax for a purchase of x dollars. Use this equation to determine what the pre-tax cost of the item is if the total cost with tax is $10.

    asked by Heather on June 1, 2010
  99. math-urgent

    Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:

    asked by sandy on December 5, 2012
  100. Math

    Jun Wei has 12 more 10 cent coins than 20 cent coins. The total value of all his coins is $5.40. Find the total number of coins he has.

    asked by Jason on October 31, 2016