Popular questions and responses by Shannon
  1. Stat Help

    A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 4% if the true proportion. Find the sample necessary if in a prior study, a sample of 200 people showed that 40 traveled overseas

    asked on October 6, 2011
  2. statiictis

    DJ Jacqueline is making a playlist for an mp3 player; she is trying to decide what 12 12 songs to play and in what order they should be played. If she has her choices narrowed down to 21 blues, 13 reggae, and 25 hip-hop songs, and she wants to play an

    asked on April 11, 2017
  3. chemistry

    when a student removed the crucible cover afer the first strong heating in creating magnesium oxide, some of the white was knocked from the cover to the floor and was lost. did this loss cause the calculated number of moles of oxygen in the compound to be

    asked on October 4, 2010
  4. Physics

    A soccer ball kicked on a level field has an initial vertical velocity component of 15 meters per second. Assuming the ball lands at the same height from which it was kicked, what is the total time the ball is in the air? [Neglect friction.]

    asked on November 14, 2012
  5. Chemistry

    Write a balanced nuclear equation for the positron emission of each of the following nuclei: a) arsenic-74 b) oxygen-15

    asked on April 20, 2012

    A hawk is flying horizontally at 10 m/s in a straight line 200m above the ground. A mouse it was carrying is released from its grasp. The hawk continues on its path at the same speed for two seconds before attempting to retrieve its prey. To accomplis the

    asked on February 11, 2011
  7. math

    A landscaping company is laying a triangular flower bed. The height of the trangle is 15ft. What lengths of the base will make the area at least 255ft squared?

    asked on December 21, 2010
  8. Math

    Two friends cut a large candy bar into equal pieces Harriet ate 1/4 of the pieces nisha ate 1/2 of the remaining pieces 6 pieces were left over how many pieces was the candy bar originally divided into

    asked on February 26, 2014
  9. Physics

    As a box is pushed 30 meters across a horizontal floor by a constant horizontal force of 25 newtons, the kinetic energy of the box increases by 300 joules. How much total internal energy is produced during this process?

    asked on December 9, 2012
  10. chemistry

    Zn is less active than Mg. Write the equations describing what occurs when ou mix: a)Zn with 0.5M magnesium chloride, MgCl2 b)Mg with 0.5M ZnCl2

    asked on October 28, 2010
  11. Statistics

    1. A simple random sample of FICO credit rating scores is listed below: 714 751 664 789 818 779 698 836 753 834 693 802 a. Find range, variance, and standard deviation. b. As of this writing, the mean FICO score was reported to be 678. Based on these

    asked on October 5, 2013
  12. chemistry

    The principal component of many kidney stones is calcium oxalate,CaC2O4. A kidney stone recovered from a typical patient contains 8.50×10^20 formula units of calcium oxalate. How many moles of CaC2O4 are present in this kidney stone?

    asked on October 19, 2011
  13. chemistry 110

    what combinations of Zn, Al, ZnSO4 and Al2(SO4)3 would you make to illustrate that Zn is less active than Al?

    asked on October 28, 2010
  14. Statistics

    Childhood participation in sports, cultural groups, and youth groups appears to be related to improved self-esteem for adolescents (McGee, Williams, Howden-Chapman, Martin, & Kawachi, 2006). In a representative study, a sample of n 5 100 adolescents with a

    asked on March 12, 2017
  15. College Chemistry

    The specific heat of a certain type of cooking oil is 1.75 cal/(g·°C). How much heat energy is needed to raise the temperature of 2.83 kg of this oil from 23 °C to 191 °C?

    asked on September 15, 2015
  16. Chemistry

    consider the reaction: N2(g) + O2 (g) --> 2NO (g) removing some of the N2(g) will_____ A) increase the concentration of O2 B) decrease the concentration of O2 C) increase the concentration of NO(g)

    asked on April 20, 2012
  17. math

    write the ratio as a percent: in a seventh grade class, 19/25 students voted of having a class picnic

    asked on January 9, 2018
  18. chemistry

    Nitrobenzene, C6H5NO2, is prepared from benzene, C6H6, and nitric acid, HNO3. The other product of the reaction is water. When 22.4 g of benzene is reacted with an excess of nitric acid, 31.6 g of nitrobenzene is produced. What is the percent yield for

    asked on October 8, 2015
  19. College Chemistry

    When one mole of C6H6 is burned, 3.27 MJ of heat is produced. When the heat from burning 5.43 g of C6H6 is added to 5.69 kg of water at 21.0°C, what is the final temperature of the water?

    asked on September 15, 2015
  20. University of North Texas

    A manufacturer ships toasters in cartons of 25. In each carton, they estimate a 8% chance that one of the toasters will need to be sent back for minor repairs. In a batch of 12,000 toasters, what are the chances that fewer than 950 need to be returned?

    asked on April 26, 2015
  21. Anatomy

    Graded potentials are: arise when ion movement causes a minor change in the resting membrane potential. usually propagate down the length of an axon. occur when voltage-gated channels open. are most often observed in axons. are usually associated with ion

    asked on November 9, 2014
  22. Chemistry

    Write the balanced net ionic equation for the following? a) Copper metal and zinc ion b) zinc and cupric ion c) Copper metal and hydrogen ion d) zinc metal and hydrogen ion e) iron metal and hydrogen ion f) Chlorine (Cl2) and bromide ion (Br-) g) Chlorine

    asked on April 16, 2014
  23. statistics

    students who learned English as well as another language simultaneously score worse on the SAT critical Reading exam than the general population of test takers? The mean score among all test takers on SAT Critical Reading exam is 501 A random sample of 100

    asked on May 8, 2013
  24. business ethics

    CONFLICT OF INTEREST Big Company is a large manufacturer of health-care products that is under fire from the government to lower costs. Big Company has an excellent reputation and is widely acknowledged as one of the best managed companies in the country.

    asked on November 16, 2010
  25. physics

    Boxes are moved on a conveyor belt from where they are filled to the packing station 12.0 m away. The belt is initially stationary and must finish with zero speed. The most rapid transit is accomplished if the belt accelerates for half the distance, then

    asked on April 2, 2015
  26. Algebra

    A community college campus plans to construct a rectangular parking lot on land bordered on one side by a highway. There are 640 feet of fencing available to fend the other three sides. Let x represent the length of each of the two parallel sides of

    asked on November 26, 2014
  27. Physics

    Human feet and legs store elastic energy when walking or running. They are not nearly as efficient at doing so as kangaroo legs, but the effect is significant nonetheless. If not for the storage of elastic energy, a 70.0-kg man running at 4.00 m/s would

    asked on September 30, 2014
  28. Physics

    3. A 2000 kg sports car moves in a horizontal circular path of 150 m\radius at a constant speed of 80 m\s. a. magnitude of centripetal acceleration b. magnitude of centripetal force

    asked on October 23, 2012
  29. accounting

    18. Balance sheet and income statement data indicate the following: Bonds payable, 6% (issued 2000, due 2020) $1,200,000 Preferred 8% stock, $100 par (no change during the year) 200,000 Common stock, $50 par (no change during the year) 1,000,000 Income

    asked on October 2, 2012
  30. health

    What are the implications of this shift for hospitals, consumers, and the health care delivery system as a whole

    asked on March 29, 2012
  31. art

    what is the role of an artist?

    asked on December 6, 2011
  32. science

    what is the role of an artist?

    asked on December 6, 2011
  33. Chemistry

    An empty flask weighs 128.632g. After vaporization of a sample of volatile liquid, at a measured temperature of 99.8 C. The flask is sealed, cooled to room temperature, and weighed. The mass is now 129.225g. The measured P atm is 757.7 torr. The flask is

    asked on April 6, 2011
  34. Confidentiality in Allied Health Essay

    Can anyone help me find other resources to the graded project for Penn Foster? I have the AMA, and the Peen foster books. Anything else would be great.

    asked on November 28, 2010
  35. chemistry

    what type of intermolecular force describes the interaction between Ca2+ and Mg2+ with water? a. dipole-dipole b. hydrogen bonding c. ion-dipole d. London dispersion

    asked on May 11, 2010
  36. world liturature and language

    Write a three-paragraph comparison between themes in Márquez's "Old Man" and Kafka's "The Metamorphosis".

    asked on April 8, 2010
  37. preschool

    write down the name of five dimensionals shapes

    asked on November 18, 2008
  38. math

    A 24-inch piece of string is cut into two pieces. One piece is used to form a circle and the other is used to form a square. How should the string be cut so that the sum of the areas is a minimum?

    asked on September 30, 2008
  39. critical thinking

    how can a person distinguish between the prejudicial and nonprejudicial use of rhetorical devices? Please check these previous answers to this question. How can a person distinguish between

    asked on June 14, 2007
  40. history

    Why do Jewish people study the Talmud and Hebrew Bible?

    asked on October 9, 2018
  41. AP CHEM

    I have multiple... 1) If a metal ore contains 23.1% pure metal, how many pounds of pure metal can be obtained from 38 pounds of metal ore? Answer in units of pounds. 2) For the reaction 3 F2 + Cl2 → 2 ClF3 , what is the maximum amount of ClF3 (92.4482

    asked on October 13, 2015
  42. physics

    A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 3.6 m to the north, 2.8 m 45◦ north of east, and 2.2 m 59◦ west of south. Starting at the same initial point, an expert (lucky) golfer could make the

    asked on September 25, 2015
  43. Maths

    What number am I? I am a multiple of 3 I am also a multiple of 7 My units digit is half my tens digit

    asked on September 22, 2015
  44. Physics

    Calculate the electric force between these two electrons. The value of the Coulomb constant 9 × 109 N · m2/C2 and the elemental charge is 1.6×10−19C. Answer in units of N (Newtons)

    asked on March 24, 2015
  45. College Physics

    Two crates are connected by a massless rope that passes over a pulley. If the crates have mass 33 kg and 82 kg, find their acceleration. If the system begins at rest, with the more massive crate a distance 12 m above the floor, how long does it take for

    asked on October 13, 2014
  46. College Physics

    A hockey puck is sliding down an inclined plane with angle θ = 12.4° as shown in the figure below. If the puck is moving with a constant speed, what is the coefficient of kinetic friction between the puck and the plane?

    asked on October 13, 2014
  47. College Physics

    A skier is traveling at a speed of 39.7 m/s when she reaches the base of a frictionless ski hill. This hill makes an angle of 14° with the horizontal. She then coasts up the hill as far as possible. What height (measured vertically above the base of the

    asked on October 13, 2014
  48. statistics

    do students who learned English as well as another language simultaneously score worse on the SAT critical reading exam than the general population of test takers? the mean score di 501. A random sample of 100 test takers who learned English as another

    asked on May 8, 2013
  49. math

    A rectangular photograph is mounted on a rectangular card. There is a border ofequal width around the photograph. The perimeter of the card is 40 centimeters longer than that of the photograph. Find the width of the border in centimeters.

    asked on March 5, 2013
  50. math 209

    .78=2(3.14)*sqrt.5/g solve for g

    asked on February 5, 2013
  51. chemistry

    Tell how to make a 1 M solution of Mg3(PO4)2 and a 0.1 M solution of CaSO4.

    asked on January 25, 2013
  52. Stats

    In one study of smokers who tried to quit smoking with nicotine patch therapy, 36 were smoking after one year after the treatment, and 34 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among smokers who

    asked on November 26, 2012
  53. Physics- Someone Please Help!!!

    A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is

    asked on October 29, 2012
  54. Physics

    A cannon ball is fired with a velocity of 200 m\s2 at an < of 25° above ground. The total flight time is 45.6 seconds. (Neglect air resistance.) a. Calculate the initial horizontal\vertical components of the velocity b. Calculate maximum height of the

    asked on October 23, 2012
  55. Physics

    1. A rescue plane flying horizontally at an altitude of 500 m and velocity of 300 m\s east drops a food supply packet to plane crash survivors on the ground. The packet falls freely to the ground without a parachute. Assume that the weather is perfect. a.

    asked on October 23, 2012
  56. physics

    A diver springs upward from a board that is 4.40 m above the water. At the instant she contacts the water her speed is 14.0 m/s and her body makes an angle of 68.8 ° with respect to the horizontal surface of the water. Determine her initial velocity, both

    asked on September 23, 2012
  57. alg 2

    A rectangular plot is 30 feet long and 20 feet wide. The area will be doubled by adding a strip at one end and another strip of the same width on one side. What would be the width of the strip?

    asked on June 28, 2011
  58. algerbra

    the area of trianlge ABC is 20 square units. if abgle A=130 and b=6 find the value of c?

    asked on April 19, 2011
  59. geometrY

    to estimate the height of a tree, Dave stands in the shadow of the tree so that his shadow and the tree's shadow end at the same point. Dave is 6 feet 4 inches tall and his shadow is 15 feet long. If he is standing 66 feet away from the tree, what is the

    asked on February 27, 2011
  60. Math

    If a grade was drawn at random from the data shown below, what is the probability that the grade is not a B? Grade Frequency A 2 B 8 C 11 D 2 F 1 I think it is 1 out of 5 or 4 but I am not sure? Please help :) Thank you much!

    asked on December 5, 2010
  61. child care

    which of the following is an obstacle to learning for a begininning mover? A.knowledge of what elements of the movement to focus on B.chronic indifference characteristics between birth and age three C.shorter time to monitor perceptual input from the

    asked on November 30, 2010
  62. child care

    which of the following is an obstacle to learning for a begininning mover?

    asked on November 30, 2010
  63. math

    A car radiator has a 6-liter capacity. If the liquid in the radiators 40% antifreeze, how much liquid must be replaced with pure anitfreeze to bring the mixture up to a 50% solutions? If I told you the answer is 1 liter, in your own words, using complete

    asked on November 17, 2010
  64. MATH

    A rectangular prism has a volume of 6,090 cm3, a width of 14 cm, and a length of 15 cm. What is the height of the rectangular prism?

    asked on November 11, 2010
  65. Math

    An experiment has three possible outcomes: A,B, and, C. If P(A)=P(B) and P(C)=2P(A)what is the probability of each event? Hint: We know that in this case, P(A)+ P(B)+P(C)=1; therefore,P(A)+P(A)+2P(A)=1 Please Help :)

    asked on October 12, 2010
  66. algebra

    Solve by the elimination method: 0.3x-0.2y=4 0.4x+0.5y= -29/19 (fraction)?? Please Help I do not understand Algebra!!

    asked on September 18, 2010
  67. computers

    Average typing speed for middle school

    asked on March 20, 2010
  68. chemistry

    What volume of O2 gas, measured at 297K, is needed to completely burn all the methane (CH4) in a 3.00L container at the same T and P?

    asked on March 8, 2010
  69. calculus

    integrate x*(x+1)^9dx I believe the substitution method is the proper way?

    asked on December 6, 2009
  70. math

    what would be the amount of compound interest on %6,000 invested for 2 years att 9%, compounded semiannually? round your answer to the nearest dollar

    asked on July 11, 2009
  71. math

    find the restrictions on the domain and range for: y=square root of 6-2x

    asked on August 26, 2011
  72. math

    Algebraically analyze the graph of the function f(x)= -6x^2+5x+2 . Find the vertex, axis of symmetry, range, minimum or maximum value, increasing and decreasing intervals, and zeros. Write the Quadratic equation in standard form. [Standard form is:

    asked on September 30, 2008
  73. Statistics

    Thirty random students took a calc test. If the sample mean was 90 & the standard deviation was 13.9, construct a 99% confidence interval for the mean score of all students. Is the answer 83.03 to 96.97??

    asked on September 14, 2008
  74. functions math

    show that if f is any function, then the function O defined by O(x)=f(x)-f(-x)all over 2 is odd

    asked on September 9, 2008
  75. physical science

    A 250.0 kg roller coaster car has 20,000.0 J of potential energy at the top of the hill. Neglecting frictional losses, what is the velocity of the car at the bottom of the hill?

    asked on July 3, 2008
  76. Science

    How are valence electrons involved in the formation of a covalent bond?

    asked on January 13, 2008
  77. Biology (AP)

    part of the Essay question off of 2003 exam: Describe how the properties of water contribute to the plasma membrane structure I would love any help I can get. thnx! if the membrane lets the water through then it is called osmosis

    asked on September 19, 2006
  78. management

    The _______________________ refutes universal principles of management by stating that a variety of factors, both internal and external to the firm, ma affect an organization’s performance.

    asked on April 6, 2020
  79. Math

    I have to phase as a rate and unit rate and round to the nearest hundredths 4 inches of snow in 4 hours please help me

    asked on October 14, 2019
  80. Chemistry

    How many grams of hydrogen are there in 140g of ethylene (C2H4) gas?

    asked on October 29, 2018
  81. Business

    What are some large-scale economic shifts that have created our present service economy? What are some more recent developments that have given rise to our business environment? How would you characterize the most important elements of customer service in

    asked on October 17, 2018
  82. math

    In order to accumulate enough money for a down payment on a​ house, a couple deposits $ 688 per month into an account paying 6 % compounded monthly. If payments are made at the end of each​ period, how much money will be in the account in 4 ​years?

    asked on March 5, 2018
  83. math

    two stores carry similar stereos for the same original price of $573. one store (lets say homegoods)offers a 16% discount and the second store, sells it for $458.40. which store gives the better discount (im stuck i dont know how to answer this plz help)

    asked on January 10, 2018
  84. math

    how do i solve this problem? 165 calories are from sugar. 250calories are in all. what percent of calories are from sugar?

    asked on January 10, 2018
  85. math

    Am I correct? write the percent as a decimal: 92.8% a. 9280 b.92.8****** c. 0.928 d.9.28

    asked on January 10, 2018
  86. math

    Am I correct? Write the decimal as a percent: 0.01 A.10% B.1%**** c.0.1% d.0.01%

    asked on January 9, 2018
  87. math

    can you please help me order 0.8,7/8,81%,and 19/25 from least to greatest?

    asked on January 9, 2018
  88. social studies

    am i correct? progressive ida tarbell is credited with *writing a series of articles about the dangers of trusts ******* *creating blue laws *changing childlabor laws * writing a novel about dangerous practices in the meat packing industry my answer: A

    asked on December 14, 2017
  89. social studies

    Am I correct? What effect did the passage of jim crow laws in the 1880s have on the lives of african americans? My answer was: *it made racial segregation legal in the south******* need answer by today

    asked on December 14, 2017
  90. social studies

    Help!im stuck on this question: What was not one of the accomplishments of progressives? *income tax *larger companies *blue laws *building codes

    asked on December 14, 2017
  91. math

    is this correct? 5/18 and 25/90 = a proportion?

    asked on December 12, 2017
  92. Trigonometry

    I'm having trouble figuring this out. An airplane has an airspeed of 160 mph. It is to make a flight in a direction of 80° while there's a 20 mph wind from 310°. What will the airplane's actual heading be? I'd appreciate any help especially on how you

    asked on July 27, 2017
  93. Trigonometry

    I'm having trouble figuring this out. An airplane has an airspeed of 160 mph. It is to make a flight in a direction of 80° while there's a 20 mph wind from 310°. What will the airplane's actual heading be? I'd appreciate any help especially on how you

    asked on July 27, 2017
  94. Trigonometry

    How do you simplify: (1/(sin^2x-cos^2x))-(2/cosx-sinx)? I tried factoring and creating a LCD of (sinx+cosx)(sinx cosx) (cosx-sinx), but cannot come up with the right answer. The answer is (1+2sinx+2cosx)/sin^2x+cos^2x,but I don't know how the book arrived

    asked on June 13, 2017
  95. Math

    Untitled Stem and leaf plot. Vertical line separates each stem number from its first leaf number. First row. Stem 2. Leaves 6, 7, 7. Second row. Stem 3. Leaves 0, 2, 3, 3, 4. Third row. Stem 4. Leaves 0, 5. Key. 3 vertical line 0 means 30. What is the

    asked on April 10, 2017
  96. Math

    A zoo measured the wingspan, in millimeters, of 9 butterflies. 55 50 54 57 50 55 53 52 55 What is the median length of the wingspans? 50 mm 54 mm 55 mm 57 mm I think it is 54 mm.

    asked on April 10, 2017
  97. Trigonometric Identities

    Triangle ABC is given where angle A=33 degrees, a=15 in., and the height, h, is 9 in. How many distinct triangle can be made with the given measurements. Please explain your answer

    asked on March 28, 2017
  98. Social studies

    I need a copy of week 16 newspaper

    asked on March 8, 2017
  99. Science

    How many molecules are in C6H12O6 or glucose?Need the answer by Feb-1-17. Thanks

    asked on January 30, 2017
  100. Math

    5 2/3 - 5= 2/3. Use a division algorithm to find the quotient. State the final answer as a mixed number. Why is the fractional part of your quotient different from your answer in the original equation 5 2/3 - 5= 2/3?

    asked on December 14, 2016


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