Most popular questions and responses by Beth
  1. Math 120

    A die is tossed. Find the odds against rolling a number greater than 2 The odds against rolling a number greater than 2 are __ : ___

    asked on March 27, 2017
  2. Math 120

    The table shows the​ distribution, by​ age, of a random sample of 3990 moviegoers ages​ 12-74. If one moviegoer is randomly selected from this​ population, find the​ probability, expressed as a simplified​ fraction, that the moviegoer is not in

    asked on March 19, 2017
  3. Physics

    Let vector B = 8.8 m, 75 degrees counterclockwise from the vertical. a) Find the x- and y-components of vector B in the normal coordinate system (where x is a horizontal line and y is a vertical line...both intersect each other). b) Find the x- and

    asked on October 8, 2011
  4. English

    In "First Confession," Gran is best described as a A) flat character. B) round character. C) stock character. D) antagonist. In "First Confession," all of the following situations contribute to the humor created in the story by transforming a familiar

    asked on January 12, 2014
  5. Chemistry

    Identify the oxidation-reduction reactions among the following: 1. Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) 2. 2Na(s) + Cl2(aq) → 2NaCl(s) 3. 2Mg(s) + O2(g) → 2MgO Identify the oxidation-reduction reactions among the following: 1 and 2 only 2 and 3 only 1

    asked on October 3, 2016
  6. Pre calc

    A water tower is located x = 375 ft from a building (see the figure). From a window in the building, an observer notes that the angle of elevation to the top of the tower is 39° and that the angle of depression to the bottom of the tower is 25°. How tall

    asked on March 27, 2017
  7. Math 120

    A city council consists of eight Democrats and seven Republicans. If a committee of six people is​ selected, find the probability of selecting three Democrats and three Republicans.

    asked on March 18, 2017
  8. AP Chemistry

    An aqueous sulfuric acid solution containing 571.6 g of H2SO4 per liter of solution at 20°C has a density of 1.3294 g/mL. Calculate (a) the molarity, (b) the molality, (c) the percent by mass, and (d) the mole fraction of H2SO4 for the solution. (MM H2SO4

    asked on January 5, 2010
  9. Math 120

    The results of a certain medical test are normally distributed with a mean of 128 and a standard deviation of 19. ​(A score above 140 is considered​ unhealthy.) Use the given table to find the percentage of people with readings below 137.

    asked on April 21, 2017
  10. English

    Why do you think Sir Gawain flinched when the Green Knight brought his ax down, but the Green Knight did not flinch when he was in the same position? The prompt is referring to the long poem "Sir Gawain and the Green Knight" I think Sir Gawain flinched

    asked on October 23, 2012
  11. Math-Geometry

    Starting from the point (0,0), a grasshopper makes a series of moves on the coordinate plane. The grasshopper's first move takes her to (3,4). She then proceeds via this rule: Move Rule: After a move which adds (x,y) to the grasshopper's coordinates, her

    asked on October 21, 2017
  12. Chemistry

    When 22.50 mL of 0.500 M H2SO4 is added to 22.50 mL of 1.00 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ΔH of this reaction. (Assume that the total volume is the sum of the individual volumes and that the

    asked on March 15, 2017
  13. calculus

    A ladder 13 feet long is leaning against the side of a building. If the foot of the ladder is pulled away from the building at a constant rate of 8 inches per second, how fast is the area of the triangle formed by the ladder, the building, and the ground

    asked on March 12, 2015
  14. AP Chem

    Consider the reaction 2 Al2O3(s) -> 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M Al solution reacts with excess O2 ? 1. -685 kJ 2. -21,962 kJ 3. -1368 kJ 4. -2738 kJ 5. -5477 kJ 6. -26,521 kJ 7. -424 kJ 8.

    asked on November 7, 2010
  15. Physics

    The planet Mars has a radius of about 0.53 Earth radii and a mass of only 0.11 Earth masses. Estimate g on Mars.

    asked on December 2, 2018
  16. Calculus

    An airplane flies at an altitude of y = 5 miles toward a point directly over an observer. The speed of the plane is 500 miles per hour. Find the rates at which the angle of elevation θ is changing when the angle is θ = 45°, θ = 60°, and θ = 80°.

    asked on April 27, 2018
  17. Chemistry

    Calculate the ΔHrxn for the following reactions using the heats of formation given in the table at the end of this assignment: a)The complete combustion of methane, CH4, producing water as a liquid. b)The complete combustion of glucose, C6H12O6, producing

    asked on February 4, 2015
  18. Chemistry

    A solution contains an unknown mass of dissolved barium ions. When sodium sulfate is added to the solution, a white precipitate forms. The precipitate is filtered and dried and found to have a mass of 258 mg. What mass of baium was in the original

    asked on April 12, 2012
  19. Physics

    Determine the ratio of the relativistic kinetic energy to the nonrelativistic kinetic energy (1/2mv2) when a particle has a speed of (a) 2.12 x 10-3c. and (b) 0.959c.

    asked on July 20, 2012
  20. chemistry

    A 0.850 m aqueous solution of KBr has a total mass of 66.0 g. What masses of solute and solvent are present?

    asked on February 13, 2019
  21. Physics

    Two disks are rotating about the same axis. Disk A has a moment of inertia of 4.53 kg·m2 and an angular velocity of +4.55 rad/s. Disk B is rotating with an angular velocity of -6.86 rad/s. The two disks are then linked together without the aid of any

    asked on April 1, 2012
  22. advanced science

    A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. What is the acceleration of the crate? (Hint: remember to find net force first) a=6.00 m/s2 a=28.1 m/s2

    asked on June 3, 2016
  23. Math 120

    A box contains 10 ​transistors,4 of which are defective. If 4 are selected at​ random, find the probability that a. All are defective. b. None are defective.

    asked on March 23, 2017
  24. English

    Did he tell you anything, or is he still ---------cat---? I can't think of the word, please help. It's a 15 letter word.

    asked on August 25, 2011
  25. English

    In "The Canterbury Tales" Chaucer uses the pilgrimage primarily as a device to ___________. A.emphasize the characters' religious aspirations B.frame the stories told by individual characters C.describe the rigors of medieval life D.create a vivid and

    asked on October 23, 2012
  26. Physics

    A sprinter can accelerate with constant acceleration for 2.70 s before reaching top speed. He can run the 100-meter dash in 10 s. What is his speed as he crosses the finish line? Please show me all the steps to solving this problem. Thanks

    asked on October 5, 2011
  27. AP chem

    It takes 208.4 kJ of energy to remove 1 mole of electrons from atom on the surface of rubidium metal. How much energy does it take to remove a single electron from an atom ont eh surface of solid rubidum? What is the maximum wavelength of light capable of

    asked on October 1, 2006

    The seeds of the garden pea are either yellow or green. A certain cross between pea plants produces progeny in the ratio 3 yellow:1 green. If four randomly chosen progeny of such a cross are examined, what is the probability that: a)3 are yellow and 1 is

    asked on February 5, 2008
  29. accounting

    P4-2A The adjusted trial balance columns of the worksheet for Porter Company are as follows. PORTER COMPANY Worksheet For the Year Ended December 31, 2008 Adjusted Account Trial Balance No. Account Titles Dr. Cr. 101 Cash 18,800 112 Accounts Receivable

    asked on February 9, 2012
  30. Pre-Algebra Please do Help !!!

    Which function rule represents the data in the table? x= -3,-2,-1,0,1 y= 1,-2,-5,-8,-11 a. y= -3x-8 b. y= 1/3x-8 c. y= 1/3+8 d. y= 3x +8 i don't know if it is b or c

    asked on May 8, 2015
  31. Calculus

    The rate of growth dP/ dt of a population of bacteria is proportional to the square root of t with a constant coefficient of 9, where P is the population size and t is the time in days (0¡Üt¡Ü10). The initial size of the population is 700. Approximate

    asked on November 9, 2015
  32. math

    A tower casts a shadow 11 feet long. The distance from the top of the tower to the end of the shadow is 61 feet. how many feet tall is the tower? 61Squared = 11squared = h squared 3721 = 121 + h squared -121 = -121 3600 = h squared I get stuck at this

    asked on January 22, 2015
  33. math

    a job pays a salary of $19,00 the first year. during the next 10 years the salary increases by 4% each year. what is the lifetime salary over the 11 year period?

    asked on December 13, 2014
  34. physics

    A rectangular container measuring 24 cm 48 cm 55 cm is filled with water. What is the mass of this volume of water in kilograms?

    asked on March 19, 2011
  35. Algebra 2 review

    Bob and Latoya both drove to a baseball game at a college stadium. Bob lives 70 miles from the stadium and latoya lives 60 miles from it. Bob drove at a rate of 50 miles/hour and Latoya drove at a rate of 40miles/hour. If they both left home at the same

    asked on April 28, 2011
  36. AP Chem

    The energy change H associated with the reaction NBr3(g) + 3H2O(g) -> 3HOBr(g) + NH3(g) is +81 kJ/mol rxn. These bond energy values might be useful: O-H 459 kJ/mol; N-H 386 kJ/mol; O-Br 201 kJ/mol. The strength of the N Br bond is 1. 4 kJ/mol 2. 465

    asked on November 7, 2010
  37. advanced science

    A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. The forces acting on the crate are __________________. A. balanced B. unbalanced

    asked on June 3, 2016
  38. math

    A flower shop buys roses with a list price of $1,500. If the wholesaler offers trade discounts of , find the trade discount amount to the nearest penny

    asked on May 24, 2013
  39. physics

    (A multiple part problem) Find the tension in the three wires that support a 10.2kg light fixture. Each wire forms 40° with the ceiling. Answer for top left wire. Find the tension in the three wires that support a 10.2kg light fixture. Each wire forms

    asked on October 20, 2008
  40. English

    What does the poem "Students" by Tom Wayman mean? I don't understand what the opening lines/sentence means- someone explain? I also don't see the irony of the last stanza either. How is it ironic? I know that it basically shows Wayman and his attempt for

    asked on May 26, 2015
  41. Physics

    A woman is 1.6 m tall and has a mass of 53 kg. She moves past an observer with the direction of the motion parallel to her height. The observer measures her relativistic momentum to have a magnitude of 2.6 x 1011 kg·m/s. What does the observer measure for

    asked on July 21, 2012
  42. French

    Could you please check and correct this for any spelling or grammar problems. Thanks! PAST 1.Quand j'étais jeune, j'ai eu des cheveux blonds. 2.Ma soeur, Marissa, et moi avons joué ensemble tout le temps. 3.J'ai sucé mon pouce. 4.J'ai porté une

    asked on December 21, 2009
  43. Calculus

    Find the area of the region enclosed by one loop of the curve. r = sin(12θ)

    asked on April 3, 2011
  44. Chemistry

    An aqueous mixture containing starch, NaCl, glucose and albumin is placed in a dialyzing bag and immersed in distilled water. Which of the following, correctly describes the location of the indicated substance after dialysis? A. albumin, inside B. starch

    asked on November 29, 2010
  45. Physics

    As Section 27.5 discusses, sound waves diffract or bend around the edges of a doorway. Larger wavelengths diffract more than smaller wavelengths. (a) The speed of sound is 343 m/s. With what speed would a 57.0 kg person have to move through a doorway to

    asked on July 21, 2012
  46. trig

    solve for x log4 64+ log2 2 ________________ =x log3 81

    asked on February 28, 2012
  47. Chemistry

    What is the maximum mass, in grams, of NH3 that can be produced by the reaction of 1.0 g of N2 and 1.0 g of H2 using the reaction below? N2+H2→NH3 (not balanced) What is the maximum mass, in grams, of that can be produced by the reaction of 1.0 g of and

    asked on October 16, 2016
  48. algebra

    find the size of each 5 payments made at the end of each year into a 6% rate sinking fund which produces 76000 at the end of 5 years

    asked on December 7, 2011
  49. math

    The Flour Power Bakery makes 200 cherry cheesecakes at a cost of $2.45 each. If a spoilage rate of 5% is anticipated, at what price should the cakes be sold to achieve a 40% markup based on cost?

    asked on May 30, 2013
  50. math

    Marteen wants to paint 2/3 of her room today.She wants to paint 1/4 of that before lunch.How much of her room will she paint before lunch today? A.1/12 B.1/6 C.5/12 D.11/12

    asked on April 14, 2015
  51. Chem 2

    The following system is at equilibrium with [N2O4] = 0.55 M and [NO2] = 0.25 M. If an additional 0.10 M NO2 is added to the reaction mixture with no change in volume, what will be the new equilibrium concentration of N2O4? N2O4(g) 2 NO2(g)

    asked on March 5, 2012
  52. Physics

    What is the rotational speed of the minute hand on a clock?

    asked on December 2, 2018
  53. physics

    A 1400 kg car is traveling at 28 m/s around a curve with a radius of 116 m. What is the angular momentum of the car?

    asked on October 27, 2016
  54. statistics

    Suppose IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. What percentage of the scores are above 130?

    asked on February 23, 2012
  55. physics

    You have a mass of 84 kg. How fast (in mph) would you have to run to have the same momentum as an 18-wheeler (m = 28,000 kg) rolling along at 1 mph

    asked on October 18, 2016
  56. physics

    Please help! The planet Mercury has a radius of about 0.38 Earth radii and a mass of only 0.055 Earth masses. Estimate g on Mercury

    asked on October 8, 2016
  57. Physics

    The gravitational force between two very large metal spheres in outer space is 57 N. How large would this force be if the mass of each sphere were

    asked on December 2, 2018
  58. Physics

    An office copier uses a lens to place an image of a document onto a rotating drum. The copy is made from this image. (a) What kind of lens is used? Should it be 1 - converging, or 2 - diverging? Suppose the lens has a focal length of magnitude 13.0 cm. If

    asked on July 14, 2012
  59. trig

    in this right trianlge ABC, m

    asked on February 28, 2012
  60. math

    A pilot estimates that 5/8 of the fuelin the planes tank will be used when the plane reaches its destination. The tank contained 42,300 gallons at take-off. How much fuel does the pilot expect to use?

    asked on January 23, 2017
  61. Math

    Alex puts his spare change in a jar every night. If he has $11.09 at the end of January, $22.27 at the end of February, $44.35 in April, $75.82 in July, $89 in August, and $114.76 at the end of October, perform a linear regression on this data to complete

    asked on January 23, 2014
  62. classroom management techniques

    14. Which of the following is part of the strategy of modifying behavior? A. Analyze the behavior that needs changing. B. Inform the student that he or she needs to change his or her behavior. C. Ignore students who demonstrate a need for attention. D.

    asked on May 15, 2011
  63. Physics

    You have a mass of 84 kg. How fast (in mph) would you have to run to have the same momentum as an 18-wheeler (m = 28,000 kg) rolling along at 1 mph

    asked on October 18, 2016
  64. Chemistry - please help

    An anyhdrous metal chloride, X, contains 37.4% Cl. X is a reducing agent, 0.895 g requiring 23.60 cm^3 of 0.100M KIO3 for complete oxidation in 3- 9M HCl. X reacts with potassium chloride to form an adduct Y, containing 14.8% K. Identify X and Y, and

    asked on November 21, 2008
  65. MATH

    Please I need help with a fraction word problem. Peter and Eric bought a large pizza that has 12 slices. John and Eric ate all the pizza. If John ate 4/6 slices, how much did Eric eat? Who ate more pizza? My answer is Eric ate 4/12 of the pizza and John

    asked on March 4, 2015
  66. chemistry

    Ammonia gas and carbon dioxide gas react to form aqueous urea (NH2CoNH2) and water. What volume of ammonia at 25 degrees celcius and 1.5 atm pressure is needed to produce 500 g of urea?

    asked on November 24, 2010
  67. physics

    A test charge (q=-5uC) lies between two positive charges: 3cm from a 2uC positive charge, and 2 cm from a 3uC positive charge. Find the force and direction (in newtons) on the test charge. I know I have to use Coulomb's law: so: F = KQ/r^2 =

    asked on September 16, 2007
  68. Physics

    If you were located halfway between the Earth and the Moon, what acceleration would you have toward Earth? (Ignore the gravitational force of the Moon as it is much less than that of the Earth.)

    asked on December 2, 2018
  69. math

    Your Porsche's gas mileage (in miles per gallon) is given as a function M(x) of speed x in miles per hour. It is found that M'(x) = 3,600x−2 − 1 (3,600x−1 + x)2 . Estimate M'(10), M'(60), and M'(110). (Round your answers to seven decimal places.)

    asked on March 9, 2011
  70. English

    Can someone tell me the physical and character traits of these characters in A Raisin in the Sun: Lena, Walter, Beneatha, Ruth, George Murchinson, and Joseph Assaigal?

    asked on January 26, 2008
  71. physics

    Given that 1 g of hydrogen combines completely with 8 g of oxygen to form water, how much water can you make with 10 g of hydrogen and 24 g of oxygen?

    asked on October 29, 2016
  72. calculus

    A Norman window is constructed by adjoining a semicircle to the top of a rectangular window . (The diameter of the semicircle is the same as the width of the rectangular) If the perimeter of the Norman window is 20 ft, find the dimensions that will allow

    asked on November 4, 2015
  73. Algebra

    Need help with triangles to find out if it is right, acute or obtuse. 14,√61,√257 2√2,√5,√13

    asked on August 23, 2019
  74. calculus

    It is estimated that t years from now, the value of a small piece of land, V(t), will be increasing at a rate of 1.6t^3/(0.2t^4+8100)^(1/2)dollars per year. The land is currently worth $420. Find V(t) and also find the value of the land after 10 years to

    asked on January 12, 2016
  75. Physics

    What is the gravitational force between two 10 kg iron balls separated by a distance of 0.1 m?

    asked on December 2, 2018
  76. Geography

    how many states are surrounded by water?

    asked on May 15, 2012
  77. Physics

    If the rotational speed of a CD changes from 650 rpm to 250 rpm as it plays 30 minutes of music, what is the CD's average rotational acceleration?

    asked on December 2, 2018
  78. Chemistry

    Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced equation for the reaction is: 2Mg(s)+O2(g)→2MgO(s) When 10.1 g of Mg are allowed to react with 10.5 g of O2, 14.5 g of MgO are collected. a) Determine the

    asked on October 19, 2016
  79. Physics 1

    Three charges are fixed to an xy coordinate system. A charge of +16C is on the y axis at y = +3.1 m. A charge of -16C is at the origin. Lastly, a charge of +55C is on the x axis at x = +3.1 m. Determine (a) the magnitude and (b) direction of the net

    asked on June 9, 2012
  80. Language and other barriers

    I was wondering if you advise me if my answers are right please help 4. To be a truly successful teacher aide in a nonbiased, culturally diverse classroom, you must A. be concerned about and aware of the problems of both minority and nonminority students.

    asked on June 18, 2011
  81. Physics

    When any radioactive dating method is used, experimental error in the measurement of the sample's activity leads to error in the estimated age. In an application of the radiocarbon dating technique to certain fossils, an activity of 0.15 Bq per gram of

    asked on July 27, 2012
  82. Physics

    A compound microscope has a barrel whose length is 17.4 cm and an eyepiece whose focal length is 1.7 cm. The viewer has a near point located 25 cm from his eyes. What focal length must the objective have so the angular magnification of the microscope is

    asked on July 14, 2012
  83. Physics

    In physics, work is defined as the product of the A) net force and the distance traveled B) net force parallel to the motion and direction traveled C) net force parallel to the motion and the time it is applied

    asked on November 4, 2016
  84. Physics

    Find the size of the net force produced by a 4 N and a 14 N force in each of the following arrangements. (a) The forces act in the same direction. N (b) The forces act in opposite directions. N (c) The forces act at right angles to each other. N

    asked on December 2, 2018
  85. Corporate Finance

    Jason's opportunity cost rate is 8 percent compounded annually. How much must he deposit in an account today if he wants to receive $5,400 at the end of each of the next 10 years? Use a financial calculator to determine the amount to be deposited today.​

    asked on May 8, 2017
  86. Math

    Beginning January 1, Community Hospital had 175 inpatient beds. On June 15, the bed count was increased to 200. The hospital provided 67,106 service days to inpatients and 68,012 service days to discharged patients. In addition, there were 9,601 admissions

    asked on November 21, 2014
  87. English-Grammar

    The interviewer (remained) speechless upon hearing about the senator’s revelations. Is remained a (I think this is the answer) linking verb action verb auxilary verb transitive verb Thanks for the help

    asked on September 22, 2012
  88. Physics

    A spacecraft approaching the earth launches an exploration vehicle. After the launch, an observer on earth sees the spacecraft approaching at a speed of 0.74c and the exploration vehicle approaching at a speed of 0.98c. What is the speed of the exploration

    asked on July 20, 2012
  89. English

    Do I have these two questions written correctly? Dr. Anton's nurse applied hydrogen peroxide, Neosporin, and a bandage to the new patient's wound. The serial 7s revealed, in my opinion, evidence of abnormalities.

    asked on May 22, 2019
  90. math

    a freight train is traveling 30mph. An automobile starts out from the same place 1 hour later and overtakes the train in 3 hours. What was the rate of the automobile?

    asked on February 7, 2013
  91. Math

    A line 'l' intersects line 'm' at point A at 45 degree angle. B and C are points on line m, where the distance from B to A is equal to the distance from A to C. How many points on line 'l' are equidistant from points B and C? How is it one point? And this

    asked on December 29, 2015
  92. Helping Abused children

    Please help 4. As a teacher aide, if you report an incident of child abuse, A. you must be able to prove your allegations to the authorities. B. you’ll most likely be asked to testify in court. C. you should keep all information related to the case

    asked on August 3, 2011
  93. chemistry

    Using a value of Ksp = 1.8 x 10-2 for the reaction PbCl2(s) = Pb+2(aq) + 2Cl-(aq). If a solution has a current value of Keq of 1.2 x 10-2, which statement is true?

    asked on June 21, 2010
  94. Math

    Suppose you have 5 marbles in a bag: 3 red and 2 black. If you reach into the bag without looking and randomly pick out two marbles, what is the probability that both marbles are red?

    asked on April 30, 2017
  95. Math

    Every hour a clock chimes as many times as the hour. For example, the clock chimes 4 times at both 4:00 am and 4:00 pm. How many times does it chime from 4:00am through 11:00 pm of the same day including 4:00 am and 11:00 pm.? What is the proper way of

    asked on February 22, 2015
  96. Physics

    The drawing shows two identical systems of objects; each consists of the same three small balls connected by massless rods. In both systems the axis is perpendicular to the page, but it is located at a different place, as shown. The same force of magnitude

    asked on April 1, 2012
  97. physics

    A block of mass 12.0 kg slides from rest down a frictionless 35.0° incline and is stopped by a strong spring with k = 1.50 104 N/m. The block slides 3.00 m from the point of release to the point where it comes to rest against the spring. When the block

    asked on November 12, 2010
  98. physics

    a ford is traveling with a speed of 15 m/s and is 200 meters ahead of a Chevy traveling in the same directin at 20 m/s. How far will the Chevy travel before catching up to the Ford?

    asked on September 25, 2012
  99. social studies

    why is the Northeast coast so crowded with cities?

    asked on October 24, 2010
  100. Maths

    What is the reference angle for (27 pi)/5?

    asked on August 14, 2009


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