Beth

Questions and answers by visitors named Beth

Questions

  1. How much water must be added to 24.0 grams of salt ot make a solution that is 12.0% by mass?

  2. 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

  3. 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

  4. Find the area of the region enclosed by one loop of the curve.

    r = sin(12θ)

  5. Revolve the region bounded by y = 4x and y = x^2 about the y-axis. In cubic units, the resulting volume is

  6. 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.

  7. A die is tossed. Find the odds against rolling a number greater than 2

    The odds against rolling a number greater than 2 are __ : ___

  8. 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 event

  9. Barnaby’s grandfather is always complaining that back when he was a teenager, he used to be able to buy his girlfriend dinner for only.

    A. If that same dinner that Barnaby’s grandfather purchased for sixty years ago now costs , and the price has

  10. 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

  11. 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

  12. 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) Find

  13. 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.

  14. 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?

  15. 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°.

  16. Tammy Smith Deposits $5000.00 in First Internets Bank 5-year CD which pays 5.22% interest compounded monthly how much interest will she have in the account in 5 years?

  17. Mitch Anderson is a security guard. He earns $7.45 per hour for regular time up to 40 hours, time-and-a-half for overtime, and double time for the midnight shift. If Mitch worked 56 hours last week, including 4 hours on the midnight shift, how much were

  18. 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?

  19. 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

  20. Two spaceships A and B are exploring a new planet. Relative to this planet, spaceship A has a speed of 0.54c, and spaceship B has a speed of 0.74c. What is the ratio DA/DB of the values for the planet's diameter that each spaceship measures in a direction

  21. Tom and Phyllis said they would pay our dog's boarding costs.

    What is the subordinate clause? Is it our dog's boarding costs

  22. 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

  23. Find a vector r(t) = at^2 + bt + c such that the set B = {2t + 1, t^2 - 1, r(t)} is a basis for P2.

    Find the values of a, b, c such that B is a basis. Find the general condition and then give a particular solution.

  24. Based on The Riddle of the Rosetta Stone, what is one way in which Jean-François Champollion and Thomas Young are alike?

    Both became discouraged and almost gave up their attempts to decipher the hieroglyphs on the Rosetta Stone. Both learned many different

  25. State whether the sequence the set of terms with general term, the quotient of the sin of n and the square root of n converges or diverges, and if it converges, give its limit. (10 points)

    A) Diverges B) Converges to 1 and −1, depending on the value of

  26. Robert is writing a paper for language arts class. He can write (1/3) of a page in (1/4) of an hour. At what rate is Robert writing?

  27. What was the importance of the inclusion of the Bill of rights?

    a. it limited the power and controls of the government b. It guaranteed the protection of the basic rights >> my answer c. It improved U.S relations with the british monarchy d. it proposed a

  28. Habeas corpus guarantees which right?

    A. the right to vote B. the right to have a fair trial C. the right to be free unless charged with a crime D. the right to speak freely

  29. If a seed is planted, it has a 65% chance of growing into a healthy plant.

    If 11 seeds are planted, what is the probability that exactly 4 don't grow?

  30. Need help with triangles to find out if it is right, acute or obtuse.

    14,√61,√257 2√2,√5,√13

  31. 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.

  32. 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

  33. Find the size of the net force produced by a 4 N and a 14 N force in each of the following arrangements.

  34. 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

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

  36. 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.

  37. 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.)

  38. 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?

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

  40. Four years ago, Danielle was 2/3 as old as Jim was. Now she is 3/4 as old as he is. How old is each now?

  41. What volume of a 0.125 M solution of NaOH is needed to neutralize 25.0 mL of a 0.285 M solution of HCL

  42. what is 8x2x4?

  43. Does SO2 also make Ca(OH)2 milk white in colour, like CO2?

  44. If Vr=[sin(B/2)]*{cos[A+(B-1)r],how do we write Vr in the form,

    Vr=f(r) - f(r-1) ? Thank you!

  45. We are asked to find the pH of a buffer solution of Dinitrophenol and NaOH,with the necessary data given.

    Do they react at 1:1 ratio? What would be the products?

  46. 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.​

  47. 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?

  48. Consider the region enclosed by the graphs of x=y^2-5 and x=3-y^2

    a)Express the area of this region by setting up an integral with respect to x b) Express the area of this region by setting up an integral with respect to y c) Find the area of this region by

  49. 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 value

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

  51. 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.

  52. 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

  53. 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.

  54. 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

  55. So far, you have used synthetic division and factoring to find x-intercepts. What additional information do you need to create an accurate sketch of the function ? How do you propose we find this information using the equation ?

  56. Use the remainder theorem to evaluate f(k), then determine if k is a factor.

    f(x)=10x^3-41x^2+32x+20; 5/2

  57. The large disk-shaped flywheel illustrated below has a radius R of 0.25 m. It is made to spin by the small wheel that contacts it at its rim. The small wheel applies a constant force of 1430 N. Friction in the bearing exerts a retarding torque 22 Nm on the

  58. A cube of ice, 28 cm on each side,is melted into a measuring cup. What is the volume of the liquid water

    -------cm^3

  59. A cube with a mass of 40 g is made from a metal with a density of 6 g/cm3. What is the volume of the cube and the length of each edge?

    ----volume cm^3 -----length cm^3

  60. 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

  61. A ham sandwich consists of one slice of ham (9 grams) and two slices of bread (25 grams each). You have 1 kg of ham and 1.2 kg of bread. You make as many sandwiches as you can. How many sandwiches did you make?

    1) How many sandwiches? 2) What is the mass of

  62. 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?

  63. 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?

  64. 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

  65. The work that a force does by acting on an object is equal to what?

    1) the product of force (in the direction of motion) and distance and is negative if the force and motion are in the same direction 2) the product of force (in the direction of motion) and

  66. 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. 3)

  67. The work that a force does by acting on an object is equal to what?

    1) the product of force (in the direction of motion) and distance and is negative if the force and motion are in the same direction 2) the product of force (in the direction of motion) and

  68. A 5 kg toy car with a speed of 6 m/s collides head-on with a stationary 1 kg car. After the collision, the cars are locked together with a speed of 5.00 m/s. How much kinetic energy is lost in the collision?

  69. 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

  70. What happens to an atom when it absorbs energy?

    1) The atom stores the energy for later use. 2) The atom re-emits the energy as electromagnetic radiation. 3) The extra energy increases the speed of the electrons in their orbitals. 4) The extra energy

  71. 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

  72. 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

  73. 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

  74. Calculations involving a limiting reactant

    Now consider a situation in which 20.0 g of P4 is added to 54.0 g of Cl2, and a chemical reaction occurs. To identify the limiting reactant, you will need to perform two separate calculations: 1) Calculate the

  75. 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

  76. A rock is thrown off a cliff with a vertical speed of 53 m/s upward and a horizontal speed of 30 m/s.

    A) what will these speeds Vx and Vy, be 4 seconds later? B) what will be the x and y displacements of the rock be 4 seconds later?

  77. Al the astronaut has a weight of 1600 N when he is standing on the surface of earth. What is the force of gravity action on him when he is in space station orbiting earth at a distance of four earth radii from the center of the earth?

  78. Angela and Paul are opposite ends of the 4.0 m long bar. Paul, whose mass is 78 kg feels attraction to Angela, whose mass is 55 kg.

    A: If the attraction is gravitational, how strong, in Newtons, is it? B: What are their individual weights?

  79. |x - 8|- 15 = -6

    How do I solve this.. Please don't do it for me..

  80. 3x + 9 = 7x - 11

    How do I solve this? You said subtract three x from each side, then all eleven to both side then divide each side by 10? I'm confused...

  81. The equation of a line is -6x-2y= -18

    What is the x-intercept of the line? -3 3 <-- ? 9 -9 The equation of a line is x+5=12 What is the y-intercept of a line? -12 5/12 12 <-- idk not sure 12/5 The equation of a line is 2x-2y=6 What is the slope of the line?

  82. The equation of a line is -6x-2y= -18

    What is the x-intercept of the line? -3 3 <-- ? 9 -9 The equation of a line is x+5=12 What is the y-intercept of a line? -12 5/12 12 <-- idk not sure 12/5 The equation of a line is 2x-2y=6 What is the slope of the line?

  83. 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

  84. 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

  85. When an item has been launched into orbit, what happens?

    1: It continues to fall but its path never reaches the ground. 2: Centripetal force from Earth's gravity keeps it from being accelerated toward Earth. 3: It no longer falls because the weakness of

  86. How many grams of sodium bicarbonate (NaHCO3) are needed to make a 0.6M solution?

  87. The union of sets P = {1, 2, 3, 4, 5, 6} Q = {4, 5, 6, 7, 8, 9} is given by which of the following?

    {1, 2, 3, 4, 5, 6, 7, 8, 9} {1, 2, 3, 4, 4, 5, 5, 6, 6, 7, 8, 9} ø {4, 5, 6}

  88. Thinking of a survey you might design for a commercial client such as a software company or a restaurant, what are the ethical implications of using the survey results to publicize your own research firm?

    Looking forward to some ideas! Thanks!

  89. A flag has a length of 1 1/4 feet when the width is 1 2/7 feet. Write the ratio to the width as a fraction in simplest form.

  90. Consider an airplane headed N 60 degrees W at a speed of 400 mph. What wind direction at a speed of 75 mph will produce a resultant direction of N 50 degrees W?

  91. visually show on compass/vector graph n 60 degrees w at 400 mph, n 40 e at 75 mph

  92. Airplane going N 60 degrees W at a speed of 400 mph. What wind direction, at a speed of 75 mph will produce a resultant direction of N 50 degrees W

  93. 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

  94. 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 normal force?

    A. 480 N down B. 480 N up C. 2300 N down D. 2300 N up

  95. 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

  96. Help please.

    .6 is 266 2/3% of what number?

  97. 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,

  98. I need help please.

    the mean distance of earth from the sun is 92,960,000 which is 258% of the mean distance of mercury from the sun. What is mercury’s mean distance from the sun in ten millions of miles?

  99. I need help please.

    the mean distance of earth from the sun is 92,960,000 which is 258% of the mean distance of mercury from the sun. What is mercury’s mean distance from the sun in ten millions of miles?

  100. 0.0293262879789

    Rounded to nearest hundredth percent.

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