1. chemistry

    The decomposition of hydrogen peroxide in solution and in the presence of iodide ion was studied in laboratory, and the following mechanism proposed based on the experimental data. H2O2 + I - = H2O + IO - (slow) H2O2 + IO - = H2O + O2 + I - (fast) Which

    asked by john117 on February 27, 2012
  2. physics

    Curve A is banked at 11.2 °, and curve B is banked at an angle of 15.2 °. A car can travel around curve A without relying on friction at a speed of 14.5 m/s. At what speed can this car travel around curve B without relying on friction? Do I need to find

    asked by S on October 20, 2014
  3. Pre-Algebra

    A triangle is enlarged by a scale factor of 10/3. a) If the perimeter of the copy is 36 meters, find the perimeter of the original triangle using the proportion 10/3. b) If the area of the copied triangle is 48 meters squared, use a proportion to find the

    asked by Joy on March 5, 2008
  4. Algebra

    Use the quadratic formula to solve the equation. Give exact answers: 2x^2 -1 = 6x. The choices are: a) -3 + square root(7)/2, -3 - square root(7)/2 b) 3 + square root(11)/2, 3 - square root(11)/2 c) 3 + square root(7)/2, 3 - square root(7)/2 d) -3 + square

    asked by Hope on June 3, 2009
  5. Math

    Please solve these word problems.Mrs sim had 2075 cartons of chicken eggs for sale.she sold 64% of the eggs.(a) how many cartons of chicken eggs were sold?(b)how many cartons of chicken eggs were not sold?

    asked by Tabassum sultana on February 15, 2019
  6. Math

    How do I set this up and how to solve it? Russ bought 3 medium and 2 large submarine sandwiches for $29.95. Stacy bought 4 medium and 1 large submarine sandwiches for $28.45. What is the price for each medium and each large submarine sandwich?

    asked by Jane on January 26, 2012
  7. Physics

    Vector V1 is 6.6 units long and points along the negative x axis. V2 is 8.5 units long and points at +55 degrees to the positive x axis. A) What are the x and y components of each vector? B) Determine the sum of vector 1 and vector 2. (magnitude and angle)

    asked by Anonymous on September 6, 2016
  8. math

    Trains A and B are traveling in the same direction on parrallel tracks. Train A is traveling at 60 mph, and train B is traveling at 80 mph. Train A passes a station at 11:15 a.m. if train B passes the same station at 11:30 a.m. at what time will train B

    asked by Mandy on November 11, 2009
  9. physics

    According to legend, to determine whether the king's crown was made of pure gold, Archimedes measured the crown's volume by determining how much water it displaced. The density of gold is 19.3 g/cm^3. If the crown's mass was 6.00 * 10^2g, what volume of

    asked by y912f on February 16, 2009
  10. algebra

    The length of a rectangular garden is 5 ft less than 3 times its width. If the perimeter of the garden is 22 ft, find the dimensions of the garden. I will start you off with... let the width be w, then the length is 3w - 5 I am pretty sure you can form the

    asked by Dee on May 13, 2007
  11. algebra

    Trains A and B are traveling in the same direction on parrallel tracks. Train A is traveling at 60 mph, and train B is traveling at 80 mph. Train A passes a station at 11:15 a.m. if train B passes the same station at 11:30 a.m. at what time will train B

    asked by Mandy on November 11, 2009
  12. Chemistry

    A 20.00 mL sample of a .1000M unknown acid solution is titrated with .1000M NaOH. Given that the acid is diprotic and its pKa's are 1.90 and 6.70 a.) Estimate the pH after 10 mL of base are added b.) estimate the pH after 20 mL of base are added c.)

    asked by lawerence on March 22, 2015
  13. statistics

    2. Betty, an employee of Shining Sun Daycare Center, read an article in Healthy Child Magazine saying that the average 3-year-old child is 37 in. tall. Betty works with 3-year-olds at Shining Sun, so later that week, she measured the height of each child

    asked by Mikos on November 18, 2013
  14. Health Part 2

    People living with HIV can have a longer and healthier life by ________. A. Joining a support group B. Taking their medicines C. Learning as much as possible about HIV and available treatments D. All of the above I'm guessing D? What percentage of all

    asked by Scarlett on August 17, 2014
  15. physics

    A person wants to participate in a bunjee jump. One end of an elastic band 10m long with a spring constant of 50N/m will be attatched to a basket on a crane and the other end to the waist of the person with a mass of 86kg. The person will step off the edge

    asked by Chris Adison on April 23, 2008
  16. math

    tickets for a football match are sold at $30 for adults and $15 for children a company bought 28 tickets if x of these tickets were for adults, write in terms of x a. the number of tickets for children b. the amount spent on tickets for adults c. the

    asked by dolorita on January 5, 2012
  17. World Geography

    REVIEW 1.In what ways did immigrants contribute to American society in the early 1900s? A. They increased the defensive power of the United States. B. They worked in factories, built railroads, and opened businesses. C. The took political power in most

    asked by bre on April 5, 2013
  18. HUMAN ORGANIZATON BEHAVIOR.... PLEASE HELP

    can u help to have an idea to get the correct answer.for the question below. What model of organizational behavior would be most appropriate in each of the following situations? (Assume that you must use the kinds of employees and supervisors currently

    asked by jessie on October 16, 2011
  19. Microbio

    I have a hard time with this finding the concept for the below: plz help How and in what way does the input of organic matter, such as sewage, effect the O2 content of a river or stream? A pond or lake? Does the organic matter get digested by bacteria,

    asked by Josh on December 5, 2006
  20. Math

    (a) A sphere of radius 4 in is inscribed in a cone with radius 6 in. How tall is the cone? (b) A cone with radius 4 in is inscribed in a sphere of radius 6 in. How tall is the cone? Show that there is more than one answer to this question.

    asked by John on August 19, 2010
  21. Child Care

    Carlos is playing in the sandbox. Thomas approches the sandbox, observes Carlos for a moment, then knocks over the bucket Carlos has just filled with sand. Carlos pushes Thomas away saying, " Get out of here." Thomas begins to cry. How would an

    asked by Brenna on February 20, 2009
  22. math

    Which three options are true about the quadratic equation?? y= 4t^2 + 16t + 18 A. The graph has a minimum. B. The graph of y crosses the horizontal axis at t = 10 and t = 20. C. The equation 4t^2 + 16 + 18 = 6 has one real solution. D. The function has a

    asked by jojo on April 30, 2007
  23. physics

    A block of mass 2.40 kg is pushed 2.09 m along a frictionless horizontal table by a constant 18.6 N force directed 23.7o below the horizontal. Determine the work done by the applied force. Determine the magnitude of the normal force exerted by the table.

    asked by beccs on October 3, 2013
  24. Chemistry

    A gas occupies a volume of 140 mL at 35.0 C and 97 kPa. What is the volume of the gas at STP? N = ( P )( V ) / ( R ) ( T ) N = ( 97.00 ) ( 140 /1000 ) / ( 8.314 ) ( 308.15 ) = 0.005300 gmol V sub STP = ( N ) ( R ) ( T sub STP ) / ( P sub STP ) V sub STP =

    asked by Angela on June 5, 2014
  25. MAT101

    For each of the relationships below, explain whether you think it is best described by a linear function or a non-linear function. Explain your reasoning. a. A person's height as a function of the person's age (from age 0 to 100) b. The probability of

    asked by SEMA LOST!!!!! on March 2, 2010
  26. Physics

    A block of mass 2.30 kg is pushed 2.38 m along a frictionless horizontal table by a constant 16.0 N force directed 26.9o below the horizontal. Determine the work done by the applied force. Determine the magnitude of the normal force exerted by the table.

    asked by Chris on October 1, 2013
  27. MAT101

    8. For each of the relationships below, explain whether you think it is best described by a linear function or a non-linear function. Explain your reasoning thoroughly a. A person's height as a function of the person's age (from age 0 to 100) b. The

    asked by SEMA on March 1, 2010
  28. #2

    A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 335 km/h in a semicircular arc with a radius of 190 m. Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant

    asked by Britt Pogue on October 9, 2006
  29. poetry

    I need to recite this poem in front of the class and i have to add at least three more lines to it. does anyone have any suggestions? Math is the thick red book, Sitting there, waiting for you to open it, Just waiting for your sigh. Math is working two

    asked by Anonymous on April 23, 2008
  30. Chemistry-

    PCl5 (g) PCl3 (g) +Cl2 what is the property that might be observed in order to determine when equlibrium has been reached? The question is a little vague. Is the property visual or some other property? I don't think vision (color) will work for PCl5 is a

    asked by Mike on May 2, 2007
  31. speed of light

    Can the speed of light be legislated? Explain your reasoning. As best as we know, the speed of light is a fundamental constant of the universe. I have no idea of the meaning "legislated". Someday they may pass laws and light will have to slow down. After

    asked by Anonymous on August 21, 2006
  32. Calculus

    I finished this problem but I wanted some feedback because I don't know if it's entirely correct. Suppose that functions f and g and their derivatives with respect to x have the following values at x=2. f(x)=8 g(x)=2 f'(x)=1/3 g'(x)=-3 Find d/dx of f(g(x))

    asked by Lauren on April 1, 2009
  33. math

    3. You recently started the paperwork to purchase a new home, and you were just notified that you can move into the house in 2 weeks. You decide to hire a moving company, but are unsure which company to choose. You search online and are interested in

    asked by jillian on April 25, 2010
  34. math 116

    You recently started the paperwork to purchase your new home, and you were just notified that you can move into the house in 2 weeks. You decide to hire a moving company, but are unsure which company to choose. You search online and are interested in

    asked by lisa on January 25, 2010
  35. Momentum Problem

    A cart of mass m1 = 15 kg slides down a frictionless ramp and is made to collide with a second cart of mass m2 = 23 kg which then heads into a vertical loop of radius 0.21 m. (a) Determine the height h at which cart #1 would need to start from to make sure

    asked by Jessica on November 3, 2010
  36. Math

    Find the zero of f(x) = (2^x-1)(-3^x+1). x = (ln2 + ln3)/(ln2 - ln3) x = (ln2 - ln3)/(ln2 + ln3) x = 2/(ln2 - ln3) x = - (ln5/ln1) I can't figure this out. Solve log(27)(log(x)10) = 1/3 for x. x = (3(inverse)sqrt90)/3 x = 10(inverse)sqrt3 x =

    asked by Max on December 7, 2017
  37. Physics

    A motorist traveling at 15m/s encounters a deer in the road 38m ahead. If the maximum acceleration the vehicle's brakes are capable of is -7m/s/s, what is the maximum reaction time of the motorist that will allow him or her to avoid hitting the deer?

    asked by Dawn on October 16, 2011
  38. History

    Which answer BEST explains how the Articles of Confederation set up government roles for declaring war? A.)Congress could declare war if needed**** B.)The states could declare war if needed C.)Congress could propose war,but the states voted to approve the

    asked by Spy355 on January 8, 2016
  39. algebra

    Solve the problem. The pressure of a gas varies jointly as the amount of the gas (measured in moles) and the temperature and inversely as the volume of the gas. If the pressure is 1170 (kiloPascals) when the number of moles is 6, the temperature is 260

    asked by Joe on December 8, 2016
  40. Social Studies

    Which of the following is most likely a piece of modern Chinese state propaganda? a. a short film promoting the Cultural Revolution. b. a statue showing the modern thinker Confucius. c. a poster supporting the one-child policy. d. a website giving

    asked by Anonymous on November 19, 2013
  41. cross word puzzle

    This is for tomorrow and i'm in trouble with this puzzle, please help:ACROSS 9 letters and start with (au)the hint is groups of people who watch or listen to a show, speech, or other performance. Down:It starts off with (aw) and the hint is: a synonym for

    asked by Elkin on March 24, 2011
  42. Math grade 12

    the function f(x)= -o.005t^2+0.8t+12 models the relationship between a certain vehicle’s speed and fuel economy, where is the fuel economy in kilometres per litre and x is the speed of the vehicle in kilometres per hour. Determine the rate of change in

    asked by Anonymous on July 22, 2011
  43. math

    Hi, I have a math problem that I can't understand how to write the equation for. The question says: a ball is thrown upwards from an initial height of 20 meters at an initial velocity of 10 meters per second. Write an equation for the height (h) of the

    asked by Michelle on March 5, 2008
  44. Physics

    A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal

    asked by Laura on December 31, 2013
  45. physics

    A moving 1.60 kg block collides with a horizontal spring whose spring constant is 295 N/m. The block compresses the spring a maximum distance of 3.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal

    asked by rory on February 28, 2008
  46. physics

    A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal

    asked by Laura on December 30, 2013
  47. Physics

    A moving 4.80 kg block collides with a horizontal spring whose spring constant is 243 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal

    asked by Courtney on March 5, 2008
  48. Physics

    A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal

    asked by Laura on January 1, 2014
  49. physics again it didnt work.

    A moving 1.60 kg block collides with a horizontal spring whose spring constant is 295 N/m. The block compresses the spring a maximum distance of 3.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal

    asked by rory on March 1, 2008
  50. chemistry

    Use the given heat-of-formation data to calculate the heat of reaction for each of the following. Solve each by combining the known thermochemical equations. Verify each result by using the general equation for finding heats of reaction from heats of

    asked by jane on March 28, 2019
  51. Math

    How would you solve this word problem in one variable inequality form? One cell phone company offers a plan that costs $29.99 and includes unlimited night and weekend minutes. Another company offers a plan that costs $19.99 and charges 35 cents per minute

    asked by Leah on September 25, 2013
  52. Math

    A piece of metal is bent into a rectangle and has a length which is 5 times as long as its width. If the perimeter of the piece of metal is 13 feet 6 inches, find the length and the width of the piece of sheet metal. You must use a variable , write an

    asked by Jon on May 16, 2008
  53. algebra

    A pharmacist has 40% and 60% iodine solutions on hand. How many liters of each iodine solution will be required to produce 4 liters of a 50% iodine. 1. iodine1 = 2, iodine2=2 2. iodine1 = 21, iodine2 = 21 3. iodine1 = 41, iodine2 = 41 4. iodine1 = 41,

    asked by juan on January 21, 2013
  54. physics

    73. A mobile is formed by supporting four metal butterflies of equal mass m from a string of length L. The points of support are evenly spaced a distance apart as shown in Figure P5.73. The string forms an angle 1 with the ceiling at each end point. The

    asked by audree on October 7, 2012
  55. Physics

    A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal

    asked by Carl on November 21, 2010
  56. childcare

    Questions 1–3 are based on the following scenario: Mrs. Carroll and her sister, Ms. Howard, plan to operate a small day care center in a remodeled building. They're licensed and staffed to handle up to 24 children. Ms. Howard doesn't plan to work at the

    asked by dawn on February 1, 2011
  57. Math

    Harry planned a rectangular garden that was 40 feet long and 10 feet wide 1.What was the perimeter,in feet,of the garden that Harry planned? 2.What was the area,in square feet,of the garden that Harry planned? 3.Suppose Harry decided to change the shape of

    asked by Frances on April 11, 2011
  58. accounting 2

    June 30, 2008/2007 Assets Cash- 34,700/23,500 accounts receivable- 101,600/92,300 inventory- 146,300/142,100 Investment-0/50,000 Land-145,000/0 equipment- 215,000/175,500 accumulated depreciation- (53,400)/(41,300) 2008= 594,000 /2007=442,100 liabilities

    asked by gabrielle on November 19, 2008
  59. Physics

    The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 120 kg and radius R = 80 cm. The engine rotates the wheel at 500 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake

    asked by Temi on October 18, 2011
  60. math

    convert 25mm= cm?????????????????????????????????????????????????????????????????????????????????????im confused wat is the metric table? the answer is 2.5cm. There are 10mm in 1 cm. So you can use this equation for that: ?mm/10=?cm Here is a simplified

    asked by chemiii on October 25, 2006
  61. Math

    I don't understand this question, could someone solve/walk me through this? One afternoon in Fort Simpson, Northwest Territories, the air temperature was −10ºC and the wind speed was 25 km/h. The air temperature dropped by 5ºC in the evening, but the

    asked by Dennis on February 5, 2014
  62. Elementary Algebra

    "The university of Oklahoma maintains a fleet of vehicles to rent to university departments. To transport equipment, the School of Drama needs to rent either a cargo can or a pickup truck for one day. The cargo van costs $28 for a day, plus $0.22 per mile.

    asked by Taba on April 15, 2014
  63. Math - Fundamental Theorem

    We can actually use the Zeros Theorem and the Conjugate Zeros Theorem together to conclude that an odd-degree polynomial with real coefficients must have atleast one real root (since the non-real roots must come in conjugate pairs). But how can we get the

    asked by Sean on October 12, 2009
  64. analytical chemistry

    Write balanced net-ionic equations to describe: a. The oxidation of Mn2+ to MnO4- by ammonium peroxydisulfate [(NH4)2S2O8] b. The air-oxidation of HAsO32- to HAsO42- c. The oxidation of Ce3+ to Ce4+ by sodium bismuthate (NaBiO3) Write balanced net-ionic

    asked by Anonymous on February 14, 2013
  65. New Age Math

    A building contractor is planning to build an apartment complex with one, two or three bedroom apartments. Let x,y,z respectively denote the number of apartments of each type to be built. Suppose that the builder will spend a total of $8,277,000, and that

    asked by Tracy on February 6, 2011
  66. Ma

    A building contractor is planning to build an apartment complex with one, two or three bedroom apartments. Let x,y,z respectively denote the number of apartments of each type to be built. Suppose that the builder will spend a total of $8,277,000, and that

    asked by Tracy on February 5, 2011
  67. QUS 103

    A locomotive of mass 20000kg is traveling at a speed of 54km/hr on a straight track.if a breaking force of 250N per turn is applied .how far will the locomotive travel before being brought to rest? My solution:v=0 u=15m/s S=? F=250 M=20000 F=ma

    asked by lee on June 14, 2016
  68. Calculus help PLEASE

    It is known that an object traveling in straight line with velocity function v(t) = t^2-t, where v is measured in meters per second. Find following. The position function s(t) when we know the position 5 meters after 2 seconds. I tried to work this out and

    asked by James on May 10, 2011
  69. physics

    here is my problem: a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the corresponding object is at a distance of 36.0 cm, what is the mirror's focal length? here's my work: 1/f = 1/v + 1/u where f=focal

    asked by physics on March 11, 2009
  70. physics

    here is my problem: a concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the corresponding object is at a distance of 36.0 cm, what is the mirror's focal length? here's my work: 1/f = 1/v + 1/u where f=focal

    asked by physics on March 11, 2009
  71. grade 12 accounting

    The account accumulated amortization - equipment is a credit account and it has 1,200 in it on the work sheet for the month ended march 31, 2003. I have to make an adjustment to it, and the adjustment is: amortization for march is 100. Do I credit or debit

    asked by kat on September 17, 2010
  72. Physics

    A block slides down an incline. As it moves from point A to point B, which are 5.0 m apart, a force F acts on the block, with magnitude 2.1 N and directed down the incline. The magnitude of the frictional force acting on the block is 10 N. If the kinetic

    asked by John on March 13, 2011
  73. ORG. CHEM- Extraction Conclusion

    Does this sound okay, if not how might i improve it? Thanks. In this lab the purpose states that the method of extraction is to separate and distil two different immiscible liquids, an organic layer and an aqueous layer. In this experiment an ion transfer

    asked by Richard on February 12, 2007
  74. math

    1. the function rule c=10n+26 relates the number of people n who attend a small concert to cost in dollars of c of the concert. Make a table of the imput/output pairs to show the cost if 27,39, and 43 people attend. 2. explain how to write a function rule

    asked by Quzzy modo on April 6, 2016
  75. physics helpppp

    particle 1 of mass m1 = 0.29 kg slides rightward along an x axis on a frictionless floor with a speed of 1.8 m/s. When it reaches x = 0, it undergoes a one-dimensional elastic collision with stationary particle 2 of mass m2 = 0.40 kg. When particle 2 then

    asked by Anonymous on March 30, 2010
  76. Phys

    Starting from rest, a 1.6x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.38 N on it. This force does 2.6x10-4 J of work on the flea. (a) What is the flea's speed when it

    asked by justin on July 3, 2013
  77. Physics

    Starting from rest, a 1.6x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.42 N on it. This force does 3.6x10-4 J of work on the flea. (a) What is the flea's speed when it

    asked by April on March 12, 2012
  78. CHEMISTRY

    4NH3 + 7O2 = 4NO2 + 6H2O HHOW MANY MOLES OF AMMONIA WILL BE REQUIRED TO PRODUCE 10.0 MOLES OF WATER? The equation tells you 4 mols NH3 will produce 6 mols H2O. Can you set up a proportion to make that work? For example, 2 mols NH3 would produce 3 mols H2O

    asked by Janice on July 17, 2007
  79. physics

    Starting from rest, a 1.6x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.38 N on it. This force does 2.6x10-4 J of work on the flea. (a) What is the flea's speed when it

    asked by ODU on July 22, 2013
  80. Physics

    1)A car is moving with uniform accelaration. It moves along two point A and B and enters with velocity 50 m/s and 80 m/s respectively . Find the velocity when the car is moving in b/w the point A and B. Here the body is not starting from rest. Now if it is

    asked by Prathiksha on August 23, 2011
  81. pre cal

    Suppose the speed of sound is c, and gravity is g. If you throw a rock from an initial height h0 and with an initial velocity v0 the height h(t) of the rock after time t is h(t)=−g/2 t^2+v0 t+ h0. (The height is negative when the rock is below ground

    asked by ari on July 11, 2016
  82. Chemistry

    When 9.0g of Al were treated with an excess of chlorine, 20.0g of Al2Cl6 were collected. 2AL + 3Cl6 -------> Al2Cl6 What was the percentage yield? This is what i did so far # moles in Al = 0.333 # moles in Cl2 = 0.282 The limiting reactant = Cl2 27g of Al

    asked by Mallory on February 10, 2007
  83. chemistry

    A mixture of 0.100 mol NO, 0.200 mol H2 and 0.0800 mol N2 were placed in a 2.00L reaction vessel, heated, and allowed to come to equilibrium conditions. At equilibrium, the molar concentration of N2 was 0.0500 mol/L. Calculate Kc for this reaction. 2NO +

    asked by gab on July 18, 2014
  84. chemistry

    determine the amount of solute needed to make 100ml aqueous solution of NaCl and MgCl2 that will cause a 10 degree change in freezing point. Determine the amounts of solute needed to make 100ml aqueous of AlCl3 and ethanol that will cause a 10 degree

    asked by shaknocka lewis on February 8, 2011
  85. chemistry lab

    determine the amount of solute needed to make 100ml aqueous solution of NaCl and MgCl2 that will cause a 10 degree change in freezing point. Determine the amounts of solute needed to make 100ml aqueous of AlCl3 and ethanol that will cause a 10 degree

    asked by shaknocka on February 7, 2011
  86. General Chemistry

    Calculate the theoretical pH after 2.50 mL and 9.50 mL of NaOH has been added in both the titration of HCl and of HC2H3O2. Indicate if the volume of NaOH is before or after the equivalence point. Compare these theoretical values with the actual values

    asked by Ashley on November 6, 2011
  87. Statistics

    Can anyone tell me how to use TI-84 calculator to solve this problem??? A company has developed a new type of light bulb, and wants to estimate its mean lifetime. A simple random sample of 12 bulbs had a sample mean lifetime of 692 hours with a sample

    asked by Anonymous on June 29, 2013
  88. physics

    a skater with an initial speed of 7.60m/s is gliding across the ice. air resistance is negligible. (a)the coefficient of kinetic friction between the ice and the skate blades is 0.100. find the deceleration caused by kinetic friction. (b)how far will the

    asked by ajo on November 23, 2007
  89. chemistry

    I asked this question earlier that drbob explained but i still do not really understand what to do. can you please make it clearer? the average pH of healthy human blood is 7.4. how many moles of H+ ions are free in your blood. The average person has

    asked by cara on May 25, 2009
  90. Math

    Explain It In one night, George reads 3 chapters of a book with 27 chapters. After the second night, he has read a total of 8/27 of the book. Explain how you would determine the number of chapters George read the second night. Solve the problem.

    asked by Amri on February 11, 2015
  91. Math

    A tank in the shape of a cone has a diameter of 8 feet and a height of 10 feet.when there is water in the tank, th water is in the shape of a cone too. find the radius of the cone of water when the water is 2 feet high. Explain how you would solve it.

    asked by Cynthia on August 3, 2010
  92. algebra PLZ HELP!!!

    y= 9/11x-17 9x-10y=179 You need to use parentheses to tell us what the problem is. Is equation 1, y = 9/(11x-17) or is it y = (9/11)x - 17? y= 9/11x-17 9x-10y=179 Rewrite them as 11 y - 9 x = -187 and -10 y + 9x = 179 Add the last two and you get y = -8

    asked by andrea on February 23, 2007
  93. Math

    Please help solve and explain it, thank you. 1. Juan, Steve and Gabriella bought a total of 30 markers at an art store. Juan bought 3 more markers than Steve. Gabriella bought 7 times as many markers as Steve. How many markers did each buy? 2.

    asked by Jaz on September 25, 2012
  94. physics

    A puck of mass 4 kg is attached to a spring of force constant 100 N/m and natural length 0.07 meters. The other end of the spring is attached to a fixed pivot. The puck is set into circular motion so that the spring is stretched 0.03 meters from its

    asked by rebecca on November 26, 2012
  95. Principals of Management

    Fernando, a manager in a retail store, is changing the work schedule of his long-term employees for the holiday season. He is using the same basic schedule as he did last year. Fernando should expect that his employees will be: I think the answer is D but

    asked by Melisa on May 7, 2011
  96. Extraction equations

    Extraction procedure and equations: Thought I'd better post this on the current page. I need the reaction equations checked. I tried to put them in bold but can't. They should all be after Reaction: Solid benzoic acid, p-nitroaniline and napthalene ->

    asked by Sheryl on October 8, 2006
  97. CHEMISTRY- vapour pressure

    Bromobenzene, C6H5Br, and chlorobenzene, C6H5Cl, form essentially ideal solutions in all proportions. At 100°C, the equilibrium vapour pressure of bromobenzene is 137mmHg and that of chlorobenzene is 285mmHg. Calculate the equilibrium vapour pressure

    asked by lulu on October 9, 2010
  98. Physics

    Heat flow question help?A brass rod with a length of 30.0 cm is placed side by side with an aluminum rod with a length of 30.0 cm and this system is placed between a hot temperature of 100°C and a cold temperature of 10.0°C. The coefficient of thermal

    asked by Amy on March 20, 2013
  99. Physics

    Heat flow question help?A brass rod with a length of 30.0 cm is placed side by side with an aluminum rod with a length of 30.0 cm and this system is placed between a hot temperature of 100°C and a cold temperature of 10.0°C. The coefficient of thermal

    asked by Amy on March 20, 2013
  100. Math

    When wrapping a birthday gift in the shape of a rectangular prism for his mother, Kenji adds an additional 2.5 square feet of gift wrap to allow for overlap.How many square feet of gift wrap will Kenji use to wrap a gift 3.5 feet long, 18 inches wide, and

    asked by Thomas on March 12, 2017

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