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. 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
  4. 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
  5. 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
  6. Math 120

    You are dealt one card from a​ 52-card deck. Find the probability that you are not dealt an ace.

    asked on March 28, 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. 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
  9. 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
  10. Calculus

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

    asked on April 3, 2011
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. trig

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

    asked on February 28, 2012
  23. 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
  24. Math

    Find the equation of the line tangent to curve x=sec(t), y=tan(t), at t=pi/6. I found th slope(derivative of the two which was csc(t). Plugged in Pi/6 and got 2 as the slope. Now how do I find the equation of the tangent? There are like two equations to

    asked on December 17, 2015
  25. 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
  26. 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
  27. Chemistry

    Does anyone know the condensed structured formula in the following reaction: a.CH3--CH2--CH=CH2+HOH-->H+ Thank you.

    asked on July 26, 2010
  28. Chemistry

    The principal quantum number (n): 1) specifies the subshell of the orbital. 2) specifies the principal shell of the orbital. 3) specifies the 3-D shape of the orbital. 4) specifies the maximum number of electrons. 5) none of the above

    asked on October 22, 2016
  29. 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
  30. utd

    A particle is moving around the ellipse 4x^2+16y^2=64 . At any time t, its x- and y coordinates are given by x(t) = 4cos t and y(t)= 2sint . At what rate is the particle’s distance to the point (1,1) changing at any time t? At what rate is the distance

    asked on March 12, 2015
  31. MATH

    I need help with a word problem. How many halves are there in two-fifths? 2/5 ÷ 1/2 = 4/5, so there are 2 halves is this correct

    asked on March 4, 2015
  32. 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
  33. chem

    Calculate [H3O+] for each of the following solutions. a)pH = 8.59 i got 3.00e-9 but it said it was wrong. what am i doing wrong. im using the equation 10-ph = [H30+]

    asked on April 6, 2011
  34. 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
  35. Accounting

    Go to Table 10-1 which is based on bonds paying 10 percent interest for 20 years. Assume interest rates in the market (yield to maturity) decline from 11 percent to 8 percent: A. What is the bond price at 11%? B. What is the bond price at 8%? C. What would

    asked on January 10, 2010
  36. 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
  37. Chemistry

    The principal quantum number (n): (1) specifies the subshell of the orbital. (2) specifies the principal shell of the orbital. (3) specifies the 3-D shape of the orbital. (4) specifies the maximum number of electrons. (5) none of the above

    asked on October 27, 2016
  38. 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
  39. Math

    A rectangle is inscribed in a circle of radius r. If the rectangle has length 2x, write the area of the rectangle as the product of two functions.

    asked on September 17, 2015
  40. Math

    A rectangle is inscribed between the x-axis and the parabola y=9-x^2 with one side along the x-axis. One side in touchin the x- axis and the opposite two vertices touch the parabola. A) Suppose the point (2,5) is the vertex of the rectangle on the original

    asked on September 14, 2015
  41. Physics

    A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.24 m/s. The car is a distance d away. The bear is 31.1 m behind the tourist and running at 4.50 m/s. The tourist reaches the car safely. What is the

    asked on June 12, 2015
  42. 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
  43. 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
  44. 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
  45. 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
  46. physics

    When a force acts on an object from an angle other than either 0° or 180° to the direction of motion: 1) The force is perpendicular to the direction of motion, so no work gets done. 2) The parallel and perpendicular component of the force both do work.

    asked on October 25, 2016
  47. 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
  48. Math

    Find the intervals on which the function is increasing, decreasing, concave up, or concave down and find any local extreme values and inflection points. So I know how to do the above, but not with piece wise functions. Someone help me out? Y={3-x^2, x=0} I

    asked on February 3, 2016
  49. Math

    Any 2 points determine a line. If there are 6 points in a plane, no 3 of which lie on the same line, how many lines are determined by pairs of these 6 points? The answer key says 15, and the explanation is (6!)/(2!4!). Could someone explain to me why there

    asked on September 21, 2015
  50. 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
  51. 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
  52. Geography

    how many states are surrounded by water?

    asked on May 15, 2012
  53. 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
  54. Chemistry

    Would the molecular ratio of the equation 4Na + O2 = 2Na2O be 4:2?

    asked on November 11, 2010
  55. Chemistry

    Are these an alcohol, phenol, an ether or a thiol. CH3--CH2--CH2--SH CH3--CH2--CH--CH2--CH3 Any help is appreciated, I am trying to get the hang of this.If I know these two, I believe I will be able to do all the other ones I have to. Thanks.

    asked on July 26, 2010
  56. physics

    A box is cubical with sides of proper lengths L1=L2=L3=2.0m when viewed in it own rest frame. If this block moves parallel to one of its edges with a speed of 0.80c past an observer, (a) What shape does it appear to have to this observer, and (b) What is

    asked on May 29, 2007
  57. Physics

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

    asked on December 2, 2018
  58. 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
  59. 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

    Zoro Manufacturing Company manufacturers wooden picture frames. Each piece of wood yields 15 frames. Each piece of wood costs $18.75. The direct labor charge is $13.50 per hour. Sixty-five frames can be produced each hour. To the nearest tenth of a cent,

    asked on March 2, 2016
  61. Business Law

    In trademark term, what is acquiring secondary meaning?

    asked on January 10, 2016
  62. Math

    What is the: - vertical asymptote -horizontal asymptote -non permissible value of y=(x^2+x-12)/(x+4) ? So this simplifies to a linear function y=x-3. BUT the oblique asymptote is also y=x-3. So does this graph not exist? I am really confused.

    asked on October 15, 2015
  63. Math

    A rectangular piece of metal with dimensions 14 CMA 24 CM is used to make an open box equal squares of side length X centimeters are cut from the corners and sides are folded up a polynomial function that represents the volume, V,of the box is:

    asked on October 1, 2015
  64. Math

    If you subtract twelve from twice a number, the result is eight. What is the number?

    asked on May 17, 2015
  65. English

    In the short story "Test" by Theordore Thomas, it is carefully constructed to offer the readers many unexpected twists and turns. Identify these twists and explain how the author intetionally misleads the audience in each case. Please help!! Thank you for

    asked on April 27, 2015
  66. Macroeconomics

    Please check my answers; stuck on a few questions on my homework. 1. In the long run, an increase in the supply of bank loans is matched by a __________ in the price level and the quantity of real loans is __________. A. rise; unchanged B. rise; increased

    asked on April 5, 2015
  67. 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
  68. 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
  69. math

    A penguin swimming with the ocean current in search of food takes 1 hour to travel 9 miles. Its return trip upstream to its starting point takes it 3 hours, What is the penguin's speed in still water? Thanks.

    asked on March 6, 2013
  70. Math

    Hello there! Could You please help me with this Geometry word problem? Here's the problem: Helen painted a picture that was 10 inches longer than it was wide. When she framed the picture, the outside dimensions (that is, the length and the width) were each

    asked on March 6, 2013
  71. Math

    Hello there! Could You please help me with this Geometry word problem? Here's the problem: Helen painted a picture that was 10 inches longer than it was wide. When she framed the picture, the outside dimensions (that is, the length and the width) were each

    asked on March 6, 2013
  72. History

    The first European power to explore the coast of West Africa was A. England B. Portugal C. Holland D. France

    asked on February 2, 2013

    At 35°C, K = 1.6 10-5 mol/L for the following reaction. 2 NOCl(g) 2 NO(g) + Cl2(g) Calculate the concentrations of all species at equilibrium for each of the following original mixtures. (a) 3.8 mol of pure NOCl in a 2.0-L flask NOCl ___ M NO ___M Cl2 __

    asked on November 19, 2012
  74. math

    Terry makes and sells necklaces. He has observed over time that when the price is $12 each, he sells an average of 20 per day. If he increases the price, then his average sales fall by 2 per day for each dollar increase. The materials for each necklace

    asked on November 15, 2012
  75. 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
  76. 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
  77. Latin

    Urgent Help - I need to translate this sentence into Latin There is nothing new under the sky

    asked on October 4, 2012
  78. Calculus

    Revolve the region bounded by y=x and y=x^2 about the y axis. In cubic units, the resulting volume is?

    asked on December 2, 2011
  79. Calculus

    a) Find the volume formed by rotating the region enclosed by x = 6y and y^3 = x with y greater than, equal to 0 about the y-axis. b) Find the volume of the solid obtained by rotating the region bounded by y = 4x^2, x = 1, and y = 0 about the x-axis. c)

    asked on November 3, 2011
  80. trig

    Triangle PQR is congruent to P'Q'R. If PQ= x+y, P'Q'+10, Q'R'= 3x-y, and QR=14, then what is x and y?

    asked on October 5, 2011
  81. 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
  82. The Teacher Aide in Early Childhood Education Prog

    Could you please help 2. One of the primary concerns of child advocacy groups is A. the need to provide more supervisory care for children. B. providing children with sports, games, and arts and crafts activities. C. the problem of low wages for early

    asked on June 24, 2011
  83. Instructional materials:Their preparation and Use

    if you could help please do 3. A document camera is more versatile than an opaque projector because you can use it to A. record sound. B. project three-dimensional objects. C. display book pages on a screen. D. view colored items. 4. Which one of the

    asked on June 9, 2011
  84. enhancing children's self-esteem

    16. The best "measure" that a person has achieved high self-esteem is a. a record of strong academic performance b. confidence in a social situation c. self- sufficiency d. strong family relationships 10. When setting guidelines or rules for children and

    asked on May 8, 2011
  85. 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
  86. maths

    Suppose that y is directly proportional to x. If y = 10 when x = −5, what is the value of y when x = 30?

    asked on January 25, 2011
  87. 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
  88. Chemistry

    What is the molecular ratio of the following equation? HNO3 + KOH = H2O + KNO3

    asked on November 11, 2010
  89. 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
  90. calculus

    the graph of f(x) passes through the point (0,6). the slope of f at any point P is 2 times the y-coordinate of P. find f(1)

    asked on October 14, 2010
  91. Chemistry

    Please heellppppppppp!!!! How do you expect the following series of compounds to compare in behavior in the two tests?(Sn1/Sn2 reaction) CH3-CH=CH-CH2-Br CH3-C=CH-CH3 ! Br CH3-CH2-CH2-CH2-Br Please help me answer this question, I really don't understand

    asked on February 9, 2010
  92. Physics

    For the harmonic potential V(x,y) = x^2 + y^2 a)Find the total differential, dV. b) Show that dV is exact c) Given that -dV = Fx.dx + Fy.dy where Fx and Fy is the force in the x and y direction, respectively, write a differential equation describing the

    asked on November 14, 2008
  93. 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
  94. 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
  95. 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
  96. 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
  97. 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
  98. 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
  99. 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
  100. Math 120

    A construction company is planning to bid on a building contract. The bid costs the company $1800. The probability that the bid is accepted is 1/5. If the bid is accepted, the company will make $46,500 minus the cost of the bid A) what is the expected

    asked on March 31, 2017


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