Questions Asked on
July 16, 2010

  1. Statistics

    Suppose a certain species bird has an average weight of xbar 3.40 grams. Based on previous studies, we can assume that the weights of these birds have a normal distribution with sigma 0.29 grams. Find the sample size necessary for a 98% confidence level

    asked by John
  2. Chemistry

    What ratio is used to carry out each conversion? a.mol CH4 to grams CH4 b.L CH4(g) to mol CH4(g)(at STP) c.molecules CH4 to mol CH4 I honestly don't kno what it's asking me I got 1 mol CH4/ 16(g) CH4 for a. 1 mol/22.4 L for b. and 6.02 x 10^23 molecules/1

    asked by Anonymous
  3. Physics

    A 123-cm-long, 5.00 g string oscillates in its n = 2 mode with a frequency of 200 Hz and a maximum amplitude of 4.50 mm. What is the tension in the string?

    asked by Brenda
  4. Physics: Sound Waves

    Two organ pipes, open at one end but closed at the other, are each. 1.14 m long. One is now lengthened by 2.00 cm. Find the frequency of the beat they produce when playing together in their fundamental.

    asked by Brianna
  5. chemistry

    Which of the following is considered a Lewis acid or a Lewis base. I- H2O BCl3 NH3 OH- H+ CO2 SO2

    asked by student
  6. Physics

    A 26.0 g object moving to the right at 17.0 cm/s overtakes and collides elastically with a 10.0 g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collision. a) 26.0 g object b) 10.0 g object

    asked by Daisy
  7. chem132

    When 15.0 g of ethyl alcohol, C2H5OH, is dissolved in 750 g of formic acid, the freezing point of the solution is 7.20 C. The freezing point of the pure formic acid is 8.40 C. Evaluate Kf for fomic acid.

    asked by bree
  8. physics

    1. If the voltage impressed across a circuit is constant but the resistance increases by a factor of 15. By what factor does the current change? 2. If the resistance of a circuit remains constant while the voltage across the circuit decreases by a factor

    asked by confused
  9. Economics Help pls

    Suppose you are given the following production function: , where y is output and K is capital. y= 60K + 20.3K2- K3 1.1 what is a production function, what is the real work application of such, and where would you source the data to develop a production of

    asked by Sarah
  10. geometry

    Two similar rectangular prisms have a scale factor of 4:9. The volume of the smaller prism is 60 cm3. Find the volume of the larger prism.

    asked by hello
  11. physics

    1. How much does it cost to operate a 75 W lamp continuously for 1 week if the power utility rate is 7/kWh?

    asked by confused
  12. physics

    A orbiting satellite stays over a certain spot on the equator of (rotating) Pluto. What is the altitude of the orbit (called a "synchronous orbit")? km

    asked by Sam
  13. physics

    In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been constructed. Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you

    asked by Sam
  14. CH102

    If a temperature increase from 18.0 to 34.0 triples the rate constant for a reaction, what is the value of the activation barrier for the reaction?

    asked by Ellen
  15. physics

    A solid uniform sphere has a mass of 7.0 104 kg and a radius of 1.2 m. (a) What is the magnitude of the gravitational force due to the sphere on a particle of mass m = 0.7 kg located at a distance of 2.1 m from the center of the sphere? N (b) What if it is

    asked by Sam
  16. Finance

    16.Peterson Electrical Supplies has generated a net income of $161,424 this year. The firm expects to see an annual growth of 30 percent for the next five years, followed by a growth rate of 15 percent for each of the next three years. What will be the

    asked by G
  17. Finance

    22.A lottery winner was given a perpetual payment of $11, 444. She could invest the cash flows at 7 percent. What is the present value of this perpetuity?

    asked by G
  18. chemistry

    If 15.0 mL of glacial acetic acid (pure HC2H3O2) is diluted to 1.50 L with water, what is the pH of the resulting solution? THe density of glacial acetic acid is 1.05 g/mL

    asked by Danielle
  19. physics

    Consider a frictionless track as shown in Figure P6.48. A block of mass m1 = 4.30 kg is released from A. It makes a head on elastic collision at B with a block of mass m2 = 9.00 kg that is initially at rest. Calculate the maximum height to which m1 rises

    asked by luke
  20. chemistry

    how many grams of AgNO3 would need to be dissolved in 1 liter, 500mL, and 100mL in order to make a 1M solution? need to show work and answers are in grams....????

    asked by al
  21. Business Finance

    21.Ogden wants to save for a trip to Australia. She will need $12,000 at the end of four years. She can invest a certain amount at the beginning of each of the next four years in a bank account that will pay her 6.8 percent annually. How much will she have

    asked by G
  22. Physics

    Charge A and charge B are 2.00 m apart, and charge A is +3.90 C and charge B is +4.00 C. Charge C is located between them at a certain point and the force on charge C is zero. How far from charge A is charge C?

    asked by Bill
  23. social studies

    What were the negative aspects of the new market economy? What were the positive aspects of the new market economy? How did the creation of a single market economy shape American values and the economy of today?

    asked by karen
  24. math

    how many different 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS?

    asked by sha
  25. physics

    A star of mass 2.0 1031 kg that is 4.8 1020 m from the center of a galaxy revolves around that center once every 4.2 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has a mass equal to that of

    asked by Sam
  26. Finance

    27.You have invested 40 percent of your portfolio in an investment with an expected return of 12 percent and 60 percent of your portfolio in an investment with an expected return of 20 percent. What is the expected return of your portfolio?

    asked by G
  27. Math Algebra

    A quick question to check my answer. Trains A & B are travelling in the same direction on parallel tracks. Train A is travelling at 100 miles per hour and train B is travelling at 110 miles per hour. Train A passes a station at 2:10 A.M. If train B passes

    asked by Shinji Langley
  28. physical science

    An electric current heats a 225 g copper wire from 20.0 °C to 40.0 °C. How much heat was generated by the electric current? (ccopper = 0.093 cal/gm-deg)

    asked by jerry
  29. statistics

    The probability that a 30-year old white male will live another year is .99842. What premium would an insurance company charge to break even on a 1-year $1 million dollar term life insurance policy?

    asked by nounou
  30. statistics

    The time it takes to give a man a shampoo and haircut is normally distributed with a mean of 22 minutes and standard deviation of 3 minutes. Customers are scheduled every 30 minutes. (a) What is the probability that a male customer will take longer than

    asked by nounou
  31. college

    a ball is thrown vertically upward from the ground with the velocity of 30m/s, a)how long will it take to rise to its highest point? b)how high does the ball rise? c)how long after projection will the ball have the velocity of 10m/s upward? tnx

    asked by josh
  32. statistics

    1. A random sample of size 49 is taken from a large population, measuring the time it takes to complete a driver’s license examination. The sample mean was found to be 47 minutes, and the sample standard deviation 5.89 minutes. Construct a 95% confidence

    asked by Anonymous
  33. physics

    A 17.0-kg satellite has a circular orbit with a period of 2.31 h and a radius of 9.10×106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 8.10 m/s2, what is the radius of the planet?

    asked by Sam
  34. Business

    18. Ray Seo has $5,000 to invest in a small business venture. His partner has promised to pay him back $8,200 in five years. What is the return earned on this investment?

    asked by G
  35. Finance

    23.You plan to save $1,400 for the next four years, beginning now, to pay for a vacation. If you can invest it at 6 percent, how much will you have at the end of four years

    asked by G
  36. Finance

    24.Norwood Investments is putting out a new product. The product will pay out $25,000 in the first year, and after that the payouts will grow by an annual rate of 2.5 percent forever. If you can invest the cash flows at 7.5 percent, how much will you be

    asked by G
  37. math

    The Houston Chronicle on January 13, 2007 reported on Texans' ticket prices to be charged Texas football fans for the 2007 season. The average Texans' ticket price will be $60.63, an increase of $2.88 from last year. Before the 2007 season, 22 teams

    asked by jenni
  38. Statistics

    1. For the following exercise, complete the following: a. Find the mean, median, and range for each of the two data sets. b. Find the standard deviation using the rule of thumb for each of the data sets. c. Compare the two sets and describe what you

    asked by Christy
  39. criminal justice

    Read Chapter Four in The Courts in Our Criminal System and then write a 200 -300 word response comparing your home state court system and the federal court system. In your response, describe in detail how the court system in your home state structured, how

    asked by Anonymous
  40. math

    how is this series 3+ 9/4 +27/16 +81/64... is converge to 12? i represent the series as 3^(n+1)/4^n n starts from 0 to infinity, is this correct formula

    asked by eng
  41. math116

    2.As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it.   a.The sales representative here tells you they also have two floor plans available, but they only

    asked by Anonymous
  42. Finance

    17.Elegant Designers have generated sales of $625,000 for the current year. If they can grow their sales at a rate of 12 percent every year, how long will they take to triple their sales?

    asked by G
  43. Finance

    25.Largent Supplies Corp. has borrowed to invest in a project. The loan calls for a payment of $17,384 every month for three years. The lender quoted Largent a rate of 8.40 percent with monthly compounding. At what rate would you discount the payments to

    asked by G
  44. trig

    In a right triangle the hypotenuse is 100meters,and alpha, the angle adjacent to the shorter leg. If cos alpha=1/2, find the measures of the two legs.

    asked by mrkkn
  45. math 117

    Can some help me with this appendix please. Thank you Pay attention to the units of measure. You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the

    asked by c.g.
  46. physics

    (a) What linear speed must an Earth satellite have to be in a circular orbit at an altitude of 153 km? m/s (b) What is the period of revolution? min Read the eBook

    asked by Sam
  47. child care

    although boys and girls are relatively equal in physical abilities during middle childhood, girls tend to be_____ than boys. a)faster, b)more flexible, c)stronger in their upper bodies, d)much better at throwing

    asked by glenda
  48. math

    Use multiplying by 1 to find an expression eqaivalent to 5/12 with a denominator of 24z

    asked by Norma
  49. trig

    In a right triangle the side opposite the 30 degree angle is 5 meters.Find the adjacent side.

    asked by DIFFICULT
  50. Economics

    The Andrews Corporation produced satellite dishes, was purchased by another compay, which was a cable company: The Total Cost function for the New Company is: TC = 1,000 + 16Q – 16Q2, where the demand curve for Satellite Dishes is PS = 400 – QS and

    asked by Joanna
  51. Statistics

    Half of a set of the parts are manufactured by machine A and half by machine B. Four (.04) of all the parts are defective. Six percent (6%) of the parts manufacture on machine A are defective. Find the probability that a part was manufactured on machine A,

    asked by nounou
  52. ch102

    The rate constant of a reaction at 30 was measured to be 5.7×10^-2. If the frequency factor is 1.2 x10^13 /s what is the activation barrier?

    asked by Ellen
  53. Math

    23.You plan to save $1,400 for the next four years, beginning now, to pay for a vacation. If you can invest it at 6 percent, how much will you have at the end of four years

    asked by G
  54. trig

    The terminal side of angle alpha is in the fourth quadrant, and sin alpha=-1/2, find the values of the other functions.

    asked by mrkkn
  55. trig

    Find the values of the followin: (cot30deg) (sec45deg)

    asked by Krsz
  56. healthcare system

    Describe which ethics principle(s) have not been adhered to and why

    asked by renay
  57. com285

    What are three examples of bias in business writing? Identify two methods you consider important to use in reducing bias in business writing.

    asked by elray
  58. physics

    A force of magnitude 25Nis directed at an angle of 37 deg above the horizontal moves a 10 Kg block along a horizontal surface at a constant velocity .How much work is done by this force in moaing the block a distance of 15m?

    asked by john
  59. principles of economic

    Deciding to buy a house is a lifelong goal for many people. Imagine that you are renting a studio apartment and have just discovered you are having a baby. Your present apartment is small and far from schools and local services. You have decided to move.

    asked by dee
  60. math fractions

    whats 1/8 of $84.00

    asked by ash
  61. Child Care

    The formation of children's core values is most strongly inflluenced by (a) peers (b)family(c)elementary school teacher(d)child care providers

    asked by Ms.Tina
  62. math

    A = area with b =base and h= height A=1/2 bh b= 19 m h = 40 m the area is m2

    asked by Norma
  63. english

    What is the tone of this article? The trackers mustered at Tex Canyon Road, 20 miles north of the Mexican border, on the afternoon of March 27. There were border-patrol agents, six search-and-rescue units from the Cochise County sheriff's department and

    asked by Chuck
  64. Finance

    21. Ogden wants to save for a trip to Australia. She will need $12,000 at the end of four years. She can invest a certain amount at the beginning of each of the next four years in a bank account that will pay her 6.8 percent annually. How much will she

    asked by G
  65. social studies

    how far did adapting to maritime advance bring venice's economic properity ?

    asked by kakajojo
  66. maths

    Derivative of √ tan x is, Answer: A. sin 2 x/ √ tan x B. cos 2 x/ 2 √ tan x C. sec 2 x D. None of these

    asked by tej
  67. trig

    answer of 17(3/5 * 2/3 - 1 divided by 17/8)

    asked by Krsz
  68. college

    How important is cultural context in understanding an individual's personality? (When responding please consider: How much variability may exist in people within a culture and is it possible to modify an individual's personality through manipulation of

    asked by Anonymous
  69. geometry

    In the following drawing, find b if a = 4.5 and c = 10.8. Round your answer to two decimal places.

    asked by keisha
  70. physics

    1. What is a typical drift speed of electrons that make up a current in a typical DC circuit? (zero, less than 1 cm/s, about 10 m/s, or the speed of light) 2. What is the typical drift speed in a typical AC circuit? (zero, less than 1 cm/s, about 10 m/s,

    asked by confused
  71. writing

    Can you help me with this proofing? Does it sound correct and flow nicely from sentence to sentence? 1. The Certified Coder position offered by Skaggs’s Regional medical Center, exactly matches my recent training and career goals. 2. I became intrigued

    asked by Anonymous
  72. xbis/219

    Breifly descibe how eBay works?

    asked by Anonymous
  73. adult education

    What routes were utilized for romantrade with china?

    asked by william
  74. child care

    Christopher is eight years old. he enjoys rhyming games and crosswords and excels at spell competitions. according to Howard Gardner ,Christopher demonstrates intelligence.A)interpersonal B)kinesthetic (C)linguistic (D)spatial i think (B)

    asked by Ms.Tina
  75. us history

    In what ways did democracy create a new political culture? How did democracy impact social change?

    asked by karen
  76. socscie

    -what is sociological imagination? -who was credited for coining the term sociology? -what is the focus of sociology? -what concept is attributed to the ability to see the personal trouble as public issues?

    asked by klyd