Popular questions and responses by ryan
  1. Easy Math??

    The stock that Mr. Ames bought cost him $80 a share. The par value of the stock is $100. If the stock pays $6 a year in dividends, what rate of interest is Mr. Ames getting on his money? A.16 2/3% B.7 1/2% C.3% D.6% E.None of the above Personally, what

    asked on July 29, 2015
  2. CHemistry

    SO2(g) + H2O(l)= H2SO(l) What mass of sulfur dioxide is needed to prepare 36.86 g of H2SO3(l)

    asked on March 26, 2014
  3. Chemistry

    How many grams of zinc metal are required to produce 2.00 L of hydrogen gas at STP according to the chemical equation shown below? Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

    asked on June 4, 2015
  4. Statistics

    Does a football filled with helium travel farther than one filled with ordinary air? To test this, the Columbus Dispatch conducted a study. Two identical footballs, one filled with helium and one filled with ordinary air, were used. A casual observer was

    asked on May 21, 2012
  5. Statistics

    The weight of a bag of corn chips is normally distributed with a mean of 22 ounces and a standard deviation of 0.5 ounces. -The probability that a bag of corn chips weighs more than 21 ounces is? -The probability that a bag of corn chips weighs between

    asked on October 27, 2013
  6. Chemistry, Vapor Pressure

    Select the pair of substances in which the one with the higher vapor pressure at a given temperature is listed first. 1. C7H16, C5H12 2. CCl4, CBr4 3. H2O, H2S 4. CH3CH2OH, CH3-O-CH3 5. Xe, Kr

    asked on December 11, 2014
  7. Chemistry

    What volume does 3.01 x 10^21 molecules of N2 occupy at STP?

    asked on April 10, 2013
  8. Chemistry

    If you have 320.0 mL of water at 25.00 °C and add 110.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

    asked on October 18, 2011
  9. Trigonometry

    if cos x=2/3 and x is in quadrant 4 find tan(x/2),sin(x/2),and cos(x/2) i got sin(x/2)=squr 1/6 tan(x/2)=squr 2/6 cos(x/2)=squr 5/6

    asked on April 5, 2016
  10. geometry

    use Euler's formula to find the missing number. Vertices: 10 Edges: 29 Faces? This just totally confuses me

    asked on January 3, 2012
  11. trig

    Given that tan B= 7/24 with B in quadrant III, find sin 2B, cos 2B, and tan 2B, using angle identities.

    asked on October 11, 2011
  12. math 100

    When you take the Scholastic Assessment Test (SAT), your score is recorded as a percentile score. If you scored in the 92nd percentile, it means that you scored better than approximately 92% of those who took the test. If Lisa's score was 85 and that score

    asked on November 4, 2018
  13. physics

    A ball is dropped from an upper floor, some unknown distance above your apartment. As you look out of your window, which is 1.5 m tall, you observe that it takes the ball 0.18 seconds to traverse the length of the window. Determine how high above the top

    asked on January 30, 2015
  14. Math

    Find how many quarts of 4% butterfat milk and 1% butterfat milk should be mixed to yield 90 quarts of 2 % butterfat milk.

    asked on January 6, 2013
  15. math

    7136 divided by 8 I am working in a work book and the answer is 892, but I can't figure how? can someone break it down for me.

    asked on May 24, 2011
  16. Chemistry

    Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 155 cal/g. The scientist observing the

    asked on January 25, 2013
  17. Geometry

    A trapezoid has an area of 166.5 in.², a height of 9 in., and one base measuring 15 in. What is the length of the other base?

    asked on December 20, 2011
  18. Math

    Petra is practicing factoring by grouping. She wants to factor the polynomial 16xy−4x^2+28y−7x. Her work is shown below. 16xy−4x^2+28y−7x 4x(4y−x)+7(4y−x) (4x+7)(4y−x) Which statements regarding Petra’s work are true? There may be more than

    asked on March 13, 2020
  19. physics

    A rubber band has a"spring constant" of 45 N/m. When the rubber band is pulled by a force of 9.8 N , how far will it stretch and what is potential energy?

    asked on March 10, 2013
  20. chemistry

    In a thermonuclear device, the pressure of 0.050 liters of gas within the bomb casing reaches 4.0 x 106 atm. When the bomb casing is destroyed by the explosion, the gas is released into the atmosphere where it reaches a pressure of 1.00 atm. What is the

    asked on July 16, 2020
  21. Operating Systems

    What mechanism would you implement in the process scheduler to automate the termination of a job that is in an infinite loop. Take into account jobs that legitimately use large amounts of cpu time for example on finding the first 10000 prime numbers

    asked on November 3, 2009
  22. Algebra 2

    To solve 49(3x) = 343(2x+1), write each side of the equation in terms of base what? . In the brackets are powers. I tried to solve this but I don't understand I believe it is the first base you go off from but I'm not sure what I'm doing and a reassurance

    asked on February 23, 2016
  23. english

    Which of the following is a subordinate clause?

    asked on April 15, 2016
  24. Trigonometry

    1. sin^2 theta+cos theta=2 (Hint: Use the Pythagorean identity sin^2 theta+cos theta=1 to replace sin^2 theta in the given equation.) I got no solution

    asked on March 25, 2016


    asked on November 29, 2011
  26. math 100

    A package of Toys Galore Cereal is marked "Net Wt. 12 oz." The actual weight is normally distributed, with a mean of 12 oz and a variance of 0.16. (a) What percent of the packages will weigh less than 12 oz? 50 Correct: Your answer is correct. % (b) What

    asked on November 9, 2018
  27. Trigonometry Help please

    1.If tan theta=3/4 and theta is an acute angle, find cos theta. 2.If sin theta=12/13 and theta is an acute angle, find cot theta.

    asked on February 12, 2016
  28. algebra

    Monica earned $60 from a bonus plus $8.50 per hour (h) she worked this week. Which of the following expressions best represents Monica's income for the week?

    asked on October 28, 2015
  29. Math

    One angle of an isosceles triangle is 28°. What are the other 2 angles? (Choose all that apply.) 76 degrees and 76 degrees 116 degrees and 116 degrees 28 degrees and 152 degrees 28 degrees and 124 degrees

    asked on January 18, 2012
  30. Math

    Parallelogram ABCD is inscribed in a circle. Then, the measure of angle A must be 90?

    asked on January 8, 2017
  31. Chemistry

    Using the given boiling points, predict which compound has the higher vapor pressure at a given temperature. A. ethanol (C2H6O, bp 78 degrees C) or 1-propanol (C3H8O, bp 97 degrees C) B. hexane (C6H14, bp 69 degrees C) or octane (C8H18, bp 125 degrees C)

    asked on April 12, 2013
  32. calculous

    Find the area of the region bounded by the parabola y = 4x^2, the tangent line to this parabola at (4, 64), and the x-axis.

    asked on November 9, 2011
  33. Physics

    In a vertical dive a peregrine falcon can accelerate at 0.6 times the free-fall acceleration (that is at 0.06g) in reaching the speed of about 100 m/c. If a falcon pulls out of a dive into a circular arc at this speed and can sustain a radial acceleration

    asked on September 25, 2012
  34. chemistry

    write the steps of complete ionization of carbonic acid and hydro sulfuric acid.

    asked on May 12, 2012
  35. Algebra

    After a 5% raise your new salary is $ 63000. Before the raise your salary was?? Help. Please.

    asked on August 26, 2010
  36. Physics

    The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 15 g nail when it is struck by a 550 g hammer moving with an initial speed of 5.1 m/s.

    asked on March 3, 2010
  37. math 100

    Find the standard deviation (rounded to the nearest unit) for the data indicated. Test Score Frequency 90 1 80 4 70 7 60 6 50 3

    asked on November 4, 2018
  38. Precal 12

    What is the value of k in the function f(x) = (2-k)/(5x+k) if its graph passes through the point (3, -2/19) A. -19/2 B. 4 C. -10 D. No such k exists I think its D, but I am not sure. Please help quickly.

    asked on June 22, 2017
  39. geometry

    can someone help me please on this question: What is the diameter of a cone with height 8 m and volume 150 m3 ?

    asked on December 23, 2011
  40. college physics

    Two blocks with masses m and M are pushed along a horizontal frictionless furface by a horizontal applied force. The magnitude of the force either of these blocks has on the other is: M being a bigger mass than m of course. I think the answer is: mF/(M-m)

    asked on December 17, 2009
  41. math

    A=1/2h (b1 + b2) Solve for b1 A=1/2h (b1 + b2) Solve for b1 I assume this is A = (1/2)(h)(b1 + b2); i.e., the h is in the numerator and not the denominator Multiply both sides by 2. 2A = (2*1/2)h(b1 + b2). 2*1/2 on the right side is 1. 2A = h(b1 + b2)

    asked on August 15, 2006
  42. math 100

    Find the standard deviation (rounded to the nearest unit) for the data indicated. Test Score Frequency 90 2 80 5 70 9 60 6 50 4 40 1 30 2 0 5

    asked on November 4, 2018
  43. Math

    How many sets of 3 primes sum to 20?

    asked on September 5, 2016
  44. Math

    A number has three distinct digits. The sum of the digits equals the product of the digits. How many three-digit numbers satisfy this condition?

    asked on September 4, 2016
  45. English

    Choose the word that best completes the sentences. One of the girls left _____ tennis shoes in the gym a. her b. hers c. their d. them I think its it A but it could also be c the best player to watch is ______ a. she b. her c. him d. me this one confuses

    asked on May 18, 2016
  46. Global history

    Compare and contrast European colonization of the Americas in the 16th and 17th centuries with European colonization of Africa and Asia in the 18th and 19th centuries. Be sure to address the motives for colonization and the impact that colonization had on

    asked on May 28, 2014
  47. physics

    Drag-race tires in contact with an asphalt surface have a very high coefficient of static fric.tion. Assuming a constant acceleration and no slipping of tires, estimate the coefficient of static friction needed for a drag racer to cover 2.1 km in 8 s,

    asked on February 21, 2014
  48. Physics

    An object moving along a horizontal track collides with and compresses a light spring (which obeys Hooke's Law) located at the end of the track. The spring constant is 38.6 N/m, the mass of the object 0.270 kg and the speed of the object is 1.20 m/s

    asked on February 11, 2014
  49. physics

    When you go out to your car one cold winter morning you discover a 0.54 cm thick layer of ice on the windshield, which has an area of 1.6 m2. If the temperature of the ice is -4.1°C, and its density is 917 kg/m3, find the heat required to melt all the

    asked on April 26, 2010
  50. Chemistry

    Perpare 500ml of 1M HCl solution from a bottle of concentrated 37%(W/W) HCL stock with a density of 1.19g/ml. 37%= 37/100 x 100 therefore mass is 37g molarity = mol/vol 1= mol/0.5 mol=0.5 mass of Hcl needed = molxmr mass = 0.5 x 36.5 mass = 18.25g

    asked on April 30, 2017
  51. Trig Help

    Given the equation for simple harmonic method d=1.3cos(3pi/4 t) answer the following questions: a)Find the maximum displacement. 1.i got 1.3 b)Find the frequency and length of the pendulum c)Calculate the value of d when t=3 i got .919 d)Determine the

    asked on March 24, 2016
  52. chemistry

    The vapor pressure of liquid chloroform, CHCl3, is 100. mm Hg at 283 K. A 0.198 g sample of liquid CHCl3 is placed in a closed, evacuated 400. mL container at a temperature of 283 K. Assuming that the temperature remains constant, will all of the liquid

    asked on November 11, 2014
  53. Statistics

    Sulfur compounds cause "off-odors" in wine, so winemaker want to know the odor threshold, the lowest concentration of a compound that the human nose can detect. The odor threshold for dimethyl sulfide (DMS) in trained wine tasters is about 25 micrograms

    asked on May 6, 2012
  54. Chem

    An aqueous KNO3 solution is made using 82.7 grams of KNO3, diluted to a total solution volume of 1.50 L. The density of this solution is 1.05 g/mL. What is the molality of this solution?

    asked on May 2, 2011
  55. chem

    7. At pH 7.4 a weak organic acid with a pKa of 6.4 would be ionized at what percent?

    asked on February 13, 2011
  56. Probability again

    A box contains 6 red balls, 4 blue balls, and 2 green balls. Three balls are randomly drawn (without replacement) from the box. What is the probability that the three balls selected are all the same color?

    asked on November 29, 2009
  57. Math

    The function h(t) = -16^2 + 120t + 300 gives the height in feet of a projectile fired from the top of a building after t seconds. When will the object reach a height of 350ft?

    asked on May 21, 2019
  58. english

    Which of the following is important for an introduction in formal or academic writing? Entertaining the audience Establishing the key point the piece of writing will make Discussing your opinion on the topic for at least three sentences Providing all of

    asked on December 13, 2017
  59. Science

    A boat moves at a speed of 15 km/h in still water. The river it is traveling in flows at a rate of 3 km/h downstream. What is the velocity of the boat if it travels downstream? What is the velocity of the boat if it travels upstream?

    asked on April 4, 2016
  60. Chemistry

    Why should a mixture to be separated by column chromatography be introduced onto the column in a minimum amount of solvent?

    asked on February 11, 2015
  61. MATH

    A box contains 6 red pencils and 8 black pencils. what fraction of thr pencils are red?

    asked on January 16, 2013
  62. Geometry

    A circle with the equation (x + 3)2 + (y - 2)2 = 25 is reflected over the line x = 2. What is the equation of the image?

    asked on January 18, 2012
  63. geometry

    ‹mÚR = 120‹ and mÚS = 100‹. Find mÚT. The diagram is not to scale.

    asked on November 25, 2011
  64. Stats

    The distribution of lifetimes for a particular brand of lightbulbs has a mean of 110 hours and a standard deviation of 20 hours. Suppose a random sample of 35 lightbulbs is taken for observation. What is the probability that the sample mean lifetime will

    asked on January 31, 2011
  65. accounting

    Kiddy Toy Corporation needs to acquire the use of a machine to be used in its manufacturing process. The machine needed is manufactured by Lollie Corp. The machine can be used for 10 years and then sold for $11,000 at the end of its useful life. Lollie has

    asked on October 25, 2008
  66. math 100

    A normal distribution has a mean of 85.7 and a standard deviation of 4.81. Find the data value corresponding to the value of z given. (Enter your answer to four decimal places.) z = 0.55

    asked on November 9, 2018
  67. Physics, Math

    Calculate the time taken by a water pump of power 500 W to lift 2000 kg of water to a tank, which is at a height of 15 m from the ground? Use: g = 10 m/s2 (

    asked on August 21, 2018
  68. Chemistry

    Carbohydrates (such as C6H12O6) undergo combustion with oxygen to produce carbon dioxide and water. Living things use this reaction (a process called respiration) to produce energy. Determine the mass of carbohydrates consumed for every 0.300 mol of oxygen

    asked on November 24, 2016
  69. Chemistry

    Carbohydrates (such as C6H12O6) undergo combustion with oxygen to produce carbon dioxide and water. Living things use this reaction (a process called respiration) to produce energy. Determine the mass of carbohydrates consumed for every 0.300 mol of oxygen

    asked on November 24, 2016
  70. Chemistry

    Carbohydrates (such as C6H12O6) undergo combustion with oxygen to produce carbon dioxide and water. Living things use this reaction (a process called respiration) to produce energy. Determine the mass of carbohydrates consumed for every 0.300 mol of oxygen

    asked on November 21, 2016
  71. Math

    A game is played using one dice. If the dice is rolled and shows 1, the player wins $1; if it shows 2, the player wins $2; if it shows a 3, the player wins $3. If the die shows 4,5,or 6 the player wins nothing. a.) If there is a charge of $1.25 to play the

    asked on November 18, 2016
  72. Chemistry

    When 50 grams of hydrocarbon X are burned with oxygen the products are carbon dioxide and water. If 65 grams of water and 100 grams of carbon dioxide are produced, how many grams of oxygen were needed for the reaction? This was a question on my chemistry

    asked on February 28, 2016
  73. Statistics

    A history class is comprised of 5 female and 8 male students. If the instructor of the class randomly chooses 8 students from the class for an oral exam, what is the probability that 2 female students and 6 male students will be selected? Round your answer

    asked on March 10, 2015
  74. math

    What is the slope of the budget line from trading with Friday (coconuts for fish)?

    asked on August 24, 2014
  75. Statistics

    An accelerated life test on a large number of type-D alkaline batteries revealed that the mean life for a particular use before they failed is 19.0 hours. The distribution of the lives approximated a normal distribution. The standard deviation of the

    asked on April 11, 2014
  76. Chemistry

    How much energy in kilocalories is needed to vaporize 255g of water? The heat of vaporization of water is 540 cal/g.

    asked on April 10, 2013
  77. Calculus

    A trough is 3 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of x^2 from -1 to 1 . The trough is full of water. Find the amount of work required to empty the trough by pumping the water over

    asked on September 29, 2012
  78. math

    what is an equation of a polynomial function that has zeros at -3 and -2?

    asked on January 16, 2012
  79. geometry

    The vertices of a triangle are P(–8, 1), Q(–6, –8), and R(4, –3). Name the vertices of the image reflected across the x-axis.

    asked on January 12, 2012
  80. geometry

    Earth’s radius is about 4,000 mi. To the nearest mile, what is the distance a person can see on a clear day from an airplane 5 mi above Earth? help please!

    asked on January 4, 2012
  81. geometry

    m angle R=130 and m angle S=80. Find m angle T. The diagram is not to scale. Hint: draw the diagonals and use propertied of triangles. I totally don't understand this one

    asked on November 27, 2011
  82. geometry

    Isosceles trapezoid ABCD has legs AB and CD and base BC If AB = 7y – 4, BC = 4y – 6, and CD = 8y – 18, find the value of y.

    asked on November 25, 2011
  83. calculus

    Find the volume of the solid generated by revolving about line x = -4 the region bounded by x = y - y^2 and x = y^2 - 3

    asked on November 9, 2011
  84. triangles

    The measures of two of the sides of an equilateral triangle are 3x + 15 in. and 7x – 5 in. What is the measure of the third side in inches?

    asked on November 4, 2011
  85. physics

    A radio receiver is set up on a mast in the middle of a calm lake to track the radio signal from a satellite orbiting the Earth. As the satellite rises above the horizon, the intensity of the signal varies periodically. The intensity is at a maximum when

    asked on May 21, 2011
  86. Math

    In parallelogram WXYZ, m

    asked on February 15, 2011
  87. Chemistry

    Steam at 100°C was passed into a flask containing 250 g of water at 21°C, where the steam condensed. How many grams of steam must have condensed if the temperature of the water in the flask was raised to 76°C? The heat of vaporization of water at 100°C

    asked on October 8, 2008
  88. Social Studies

    Which is the most important function of banks in an economy? A. extending credit B. guarding savings C. providing mutual fund options D. managing employee pay systems __________ Customers cannot purchase every product. How does this fact affect companies

    asked on September 11, 2019
  89. math 100

    The equation for a general normal curve with mean μ and standard deviation σ is y = e−(x − μ)2/(2σ2) σ 2π . Calculate values for x = 20, 30, , 70, 80 where μ = 50 and σ = 10. Note that setting μ = 0 and σ = 1 in this equation gives the

    asked on November 9, 2018
  90. math 100

    Suppose that, for a certain exam, a teacher grades on a curve. It is known that the mean is 55 and the standard deviation is 5. There are 35 students in the class. What score would be necessary to obtain an A? or above

    asked on November 9, 2018
  91. Biology

    What are 2 advantages for binary fission in bacteria?

    asked on November 15, 2016
  92. Math

    An old book listed that 72 turkeys were bought for $\$\square.\square\square$ each, at a total cost of $\$\square 67.9\square.$ What was the cost of each turkey, if each $\square$ stands for a digit that was unreadable in the old book? Note: The $\square$

    asked on September 3, 2016
  93. Trigonometry

    Given the equation for simple harmonic method d=1/12 sin(60 pi t) answer the following questions: b)Find the frequency i got 60pi c)Calculate the value of d when t=3 d)Determine the least positive value of t for which d=0.

    asked on March 24, 2016
  94. MATH 4 GRADE

    Nigel cut a loaf a bread into 12 equal slices. His family ate some of the bread and now 5/12 is left. Nigel wants to put each of the leftover slices in its own bag. how many bags does Nigel need?

    asked on February 16, 2016
  95. Easy Math??

    Carol started from home on a trip averaging 30 miles per hour how fast must her mother drive to catch up to her in 3 hours if she leaves 30 minutes after Carol? Use an equation to solve your work. a.35 mph b.39 mph c.40 mph I heard that the answer is a,

    asked on July 30, 2015
  96. Stoichiometry chem

    How many moles of carbon are found in 250.0 g of CaCO3? I started off with finding the molar mass of CaCO3, which is 100.09g. From there I divided 250g by 100.09g, but I have no idea what to do from there.

    asked on June 27, 2015
  97. Math

    Joan's stamp collection consists of three books. Two tenths of her stamps are on the first book, several sevenths are in the second, and there are 303 stamps in the third book. How many stamps are there in Joan's collection?

    asked on June 6, 2015
  98. Chemistry Gas Law

    How many grams of Mg must react with HCl in order to produce 40.0 ml of hydrogen gas at 22 degrees celsius and 1.02 bar? If the magnesium ribbon weighs 1.83mg/mm, how many mm of the ribbon will you require? Thanks in advance for your help!!

    asked on May 12, 2015
  99. geometry

    if a cone is 7.5 cm high and has a vertical angle of 70 degree calculate the diameter of its base.

    asked on May 16, 2014
  100. Math

    Suppose Meagan needs to drive the truck 10 miles to her new home. a) What is the cost of using Truck A? b) What is the cost of using Truck B? c) Which company offers the better deal at this mileage? 2. Suppose Meagan needs to dive the truck 30 miles to her

    asked on January 26, 2014


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