Popular questions and responses by Meghan
  1. Statistics

    An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are independently and normally distributed with a mean of 120 cm and a standard deviation of 4.7 cm. Find the probability that if 3 are

    asked on September 21, 2011
  2. chem

    For the reaction 3NO2 + H2O  2HNO3 + NO, how many grams of HNO3 can form when 1.00 g of NO2 and 2.25 g of H2O are allowed to react? This is a limiting reagent problem. 1. Write the equation. You have done that and it is balanced. 2. Convert 1.00 g NO2 and

    asked on February 28, 2007
  3. Calculus

    The base of a triangle is shrinking at a rate of 1 cm/min and the height of the triangle is increasing at a rate of 6 cm/min. Find the rate (in cm2/min) at which the area of the triangle changes when the height is 38 cm and the base is 36 cm. I just want

    asked on April 14, 2018
  4. algebra

    The half-life of plutonium-234 is 9 hours. If 40 milligrams is present now, how much will be present in 4 days? (Round your answer to three decimal places.)

    asked on November 20, 2011
  5. physics

    a student drops a ball from a window 3.5m above the sidewalk. the ball accelerates at 9.80m/s^2. How fast is it moving when it hits the sidewalk.

    asked on September 22, 2011
  6. chemistry

    The kinetic energy of a rolling billiard ball is given by KE=1/2mv2. Suppose a 0.17-kg billiard ball is rolling down a pool table with an initial speed of 4.7m/s . As it travels, it loses some of its energy as heat. The ball slows down to 3.7m/s and then

    asked on July 27, 2013
  7. chemistry

    a student needs to prepare an aqueous solution of sucrose at a temperature of 20 degrees c with a vapor pressure of 15. 0 mm Hg. How many grams of sucrose (mm=342 g/mol) does she need if she uses 375 g H20? (the vapor pressure of water at 20 degrees c is

    asked on December 2, 2010
  8. physics

    A bike accelerates from 0.0m/s to 4.0m/s in 4s. what distance does it travel?

    asked on September 22, 2011
  9. Math

    Find the maximum area of a rectangle inscribed in the region bounded by the graph of y = (3-x)/(2+x) and the axes. (Round your answer to four decimal places.)

    asked on April 7, 2018
  10. physics

    A boat floating in fresh water displaces water weighing 35.6 kN. (a) What is the weight of the water this boat displaces when floating in salt water of density 1.10 x 10^3 kg/m^3? (b) What is the difference between the volume of fresh water displaced and

    asked on November 14, 2010
  11. Chemistry

    The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 450. g of pure Cu?

    asked on September 28, 2015
  12. physics

    You push a 2.0 kg block against a horizontal spring, compressing the spring by 15 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 75 cm from where you released it. The spring constant is 200 N/m. What is the

    asked on November 7, 2010
  13. chemistry

    The Arrhenius theory explains why ammonia, NH3, is basic, but the Bronsted-Lowry theory does not. True or False

    asked on December 6, 2014
  14. algebra

    Ociel has designed a square mural that measures 10 feet on each side. Bill has also designed a square mural, but his measures y feet shorter on each side. a. Write an expression to represent the area of Bill's mural: (10-2y)(10-2y) b. How much smaller than

    asked on April 18, 2016
  15. Physics

    An Alaskan rescue plane traveling 43 m/s drops a package of emergency rations from a height of 129 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s 2 . Where does the package strike the ground relative to the point directly below

    asked on March 3, 2016
  16. Algebra

    Snape has 2000 mL of a magic potion that is 30% DeMuggle Juice. He also has hundreds of 25 mL bottles that are full of 75% DeMuggle Juice solution. Every time he waves his wand, one of these bottles is added to his magic potion. How many times must he wave

    asked on February 6, 2009
  17. 5th Grade English

    Should I capitalize indians in a sentence? Example - The indians live in the southwest. Another one has me confused, I played with Mexican jumping beans. Should I capitalize mexican jump beans? Thanks any help will be great.

    asked on September 1, 2009
  18. English; Grammar

    Hey there! I'm just needing to check my 10 questions because I'm still lost and need assistance. Please correct me if I'm wrong and tell me why! ----------------------------- 1) Choose the answer that identifies the participial in the sentence. Dozens of

    asked on December 18, 2015
  19. Math

    One grocery clerk can stock a shelf in 40 min, whereas a second clerk requires 20 min to stock the same shelf. How long would it take to stock the shelf if the two clerks worked together? Is this how you do this: t/40 + t/24 =1 t*3/40*3 + t*5/24*5 =1

    asked on March 24, 2010
  20. Science

    On the surface of the Earth, it is approximately 6,200 miles to the North or South pole. How many miles is it between two parallels 5 degrees apart?

    asked on October 6, 2009
  21. Calculus

    Two poles are connected by a wire that is also connected to the ground. The first pole is 60 ft tall and the second pole is 30 ft tall. There is a distance of 90 ft between the two poles. Where should the wire be anchored to the ground (in ft, from the

    asked on April 7, 2018
  22. Math

    You are the manager of an apartment complex with 50 units. When you set rent at $800/month, all apartments are rented. As you increase rent by $25/month, one fewer apartment is rented. Maintenance costs run $50/month for each occupied unit. What is the

    asked on April 7, 2018
  23. math

    Suppose that the format for license plates in a certain state is two letters followed by four numbers. How many different plates can be made if repetitions of numbers and letters are allowed except that no plate can have four zeros?

    asked on September 30, 2011
  24. math

    an item originally costs 16.95 and is on sale for 22% off the original price. the sales tax is 6.5%.find the cost of the item. explain each step.

    asked on April 11, 2018
  25. Math

    You have 700 ft of fencing to make a pen for hogs. If you have a river on one side of your property, what are the dimensions (in ft) of the rectangular pen that maximize the area? shorter side longer side

    asked on April 7, 2018
  26. College Physics

    Suppose the Eskimo is pushing the same 50.0-kg sled across level terrain with a force of 51.5 N. If he does 3.85 102 J of work on the sled while exerting the force horizontally, through what distance must he have pushed it?

    asked on October 6, 2012
  27. physics

    A baseball thrown at an angle of 65.0^\circ above the horizontal strikes a building 16.0 {\rm m} away at a point 5.00 {\rm m} above the point from which it is thrown. Ignore air resistance. a) find the magnitude of the initial velocity of the baseball. b)

    asked on September 15, 2011
  28. Calculus

    The radius of a circle increases from 2 meters to 2.1 meters. Use differentials to estimate the increase in the area of this circle I dont understand how to do this type of problem could someone help?

    asked on April 12, 2018
  29. Math

    A tree grows vertically on a slope which has an incline of 27 degrees. When the sun is at an elevation of 78 degrees, the tree casts a shadow of 48 feet directly down the slope.

    asked on September 20, 2016
  30. Math

    Find the dimensions (in units) of the closed cylinder with volume V = 16π units3 that has the least amount of surface area. radius units height units

    asked on April 7, 2018
  31. Geometry

    In the standard (x,y) coordinate plane, if the x-coordinate of each point on a line is 4 less than twice its y-coordinate, what is the slope of the line?

    asked on April 16, 2012
  32. Math

    Using his driver on the 7th tee, Chris hits an excellent shot, right down the middle of the fairway. The ball follows the parabolic path shown in the figure, described by the quadratic function: h(x)=0.5x-0.002x^2. This relates the height, h, of the ball

    asked on December 4, 2016
  33. Calculus

    A road running north to south crosses a road going east to west at the point P. Car A is driving north along the first road, and an airplane is flying east above the second road. At a particular time the car is 15 kilometers to the north of P and traveling

    asked on April 14, 2018
  34. physics

    A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.71 of the person's regular weight. Calculate the acceleration of the elevator, and find the direction of acceleration.

    asked on November 14, 2010
  35. College Algebra

    A rectanguler piece of metal is 5 inches longer than it is wide. Square with sides 1 inches longer are cut from the four corners and the flaps are folded upward to form an open box. If the volume of the box is 644 inches, what are the original dimensions

    asked on January 19, 2016
  36. Physics

    An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of + 14.2 m/s and measures a time of 22.2 s before the rock returns to his hand. What is the acceleration

    asked on September 6, 2012
  37. organic chem

    . Use the Henderson-Hasselbach equation: pH = pKa + log [A-]/[AH], where A- is the conjugate base and AH is the weak acid. Calculate the pH of an acetate buffer in which the acetate concentration [CH3COO-] is 3.5 times greater than acetic acid [CH3COOH].

    asked on February 7, 2013
  38. distance

    the number of feet between 2 objects varies directly as the number of miles. if the distance between 2 objects is 2 1/2 miles or 13,200 feet, how many feet are equivalent to a distance of 7 miles? plz show the work too!!!

    asked on April 11, 2018
  39. Math

    Consider two nonnegative numbers x and y such that x + y = 12. Find the values of x and y that optimize the following quantity. xy Maximize the quantity. {x, y} = Minimize the quantity. (Order your answers from smallest to largest x, then from smallest to

    asked on April 7, 2018
  40. physics

    A disk, with a radius of 0.25 m, is to be rotated like a merry-go-round through 800 rad, starting from rest, gaining angular speed at the constant rate α1 through the first 400 rad and then losing angular speed at the constant rate -α1 until it is again

    asked on December 5, 2010
  41. Chemistry

    The formation constant* of [M(CN)4]2– is 7.70 × 1016, where M is a generic metal. A 0.150-mole quantity of M(NO3)2 is added to a liter of 0.870 M NaCN solution. What is the concentration of M2 ions at equilibrium?

    asked on April 5, 2016
  42. geometry

    A tree that is 100 feet tall casts a shadow that is 150 feet long. Determine the angle at which the rays of the sun hit the ground to the nearest degree.

    asked on February 2, 2012
  43. Math

    A plane can fly 140 mph in calm air. Flying with the wind, the plane can fly 700 mi in the same amount of time it takes to fly 420 mi against the wind. Whats the rate of the wind?

    asked on March 24, 2010
  44. Calculus

    A patient's pulse measures 110 bpm, 70 bpm, then 60 bpm. To determine an accurate measurement of pulse, the doctor wants to know what value minimizes the expression (x − 110)2 + (x − 70)2 + (x − 60)2. What value (in bpm) minimizes it?

    asked on April 7, 2018
  45. MATH

    Consider the experiment of rolling a single die. Find the probability of the event described.What is P(number showing is not odd)?

    asked on April 7, 2010
  46. Math

    You can run at a speed of 4 mph and swim at a speed of 2 mph and are located on the shore, 3 miles east of an island that is 1 mile north of the shoreline. How far (in mi) should you run west to minimize the time needed to reach the island?

    asked on April 7, 2018
  47. physics

    the car travels at 20m/s when the driver sees a child. It takes 0.8s to react, then steps on the brakes and slows at 7.0m/s^2. How far does the car go before it stops?

    asked on September 22, 2011
  48. Physics

    a book weighs 4 N. When held at rest in your hands, the net force on the book?

    asked on November 8, 2010
  49. physics

    During an Olympic bobsled run, the Jamaican team makes a turn of radius 7.6 m at a speed of 96.6 km/h. What is their acceleration in terms of g?

    asked on October 12, 2010
  50. Math- Geometry

    A board 20 feet long is cut into two boards with lengths in ratio of 5 to 2. To the nearest tenth of a foot, how lng is the longer piece of the board?

    asked on January 30, 2011
  51. English

    I need to write a Reading Response to "Why We Crave Horror Movies" by Stephen King. I need help figuring out the theme to the essay.

    asked on February 23, 2011
  52. calculus

    Differentiate the function f(x) = 186.5

    asked on October 14, 2008
  53. chemistry

    The mass of an atom is distributed evenly throughout the atom.

    asked on December 6, 2014
  54. chemistry

    Calculate the number of moles in 74.1 g Pb(C2H3O2)2.

    asked on December 6, 2014
  55. organic chem

    Classify as primary, secondary, tertiary alcohols. i. 2-butanol ii. 3-methyl-3-pentanol iii. 2-methyl-1-pentanol iv. 3-chlorocyclohexanol

    asked on February 21, 2013
  56. physics

    a bike first accelerates from 0m/s to 5.0m/s in 4.55, then continues at this constant speed for another 4.5s. what is the total distance traveled by the bike?

    asked on September 22, 2011
  57. chemistry

    For the following reaction at a certain temperature, it is found that the equilibrium concentrations in a 5.00 L rigid container are [H2] = 0.0500 M, [F2] = 0.0100 M, and [HF] = 0.400 M. If 0.261 mol of F2 is added to this equilibrium mixture, calculate

    asked on November 13, 2009
  58. algebra

    susie has designed an exercise program for herself. one part requires her to walk between 25 and 30 miles each week. she plans to walk the same distance each day five days a week. what is the range of miles that she should walk each day? write and solve a

    asked on November 24, 2008
  59. Marketing

    I am writing a report for marketing and have to create a fictional business. My first business was a clothing store. I need an idea for another business. I was thinking maybe a candy store, or a water ice store. Are they considered retail ? Do you think

    asked on October 3, 2014
  60. population

    the number of students at Maria's school decreased to 98% of last years number. currently, there are 1,170 students . how many students were there last year? round to the nearest whole number.

    asked on April 11, 2018
  61. physics

    An elevator (mass 4175 kg) is to be designed so that the maximum acceleration is 0.0700g. What is the maximum force the motor should exert on the supporting cable? What is the minimum?

    asked on November 14, 2010
  62. Algebra

    Flying with the wind, a small plane flew 360 miles in 2hours. Against the wind, the plane could fly only 300 miles in the same amount of time. Find the rate of the plane in calm air and the rate of the wind. I cant figure out how to solve this. Please help

    asked on February 24, 2010
  63. calculus-optimazation

    The sum of the perimeters of an equliateral triangle and square is 10. Find the dimensions of the triangle and square that produce a minimum total area.

    asked on February 25, 2009
  64. Algebra

    Flying with the wind, a small plane flew 360 miles in 2hours. Against the wind, the plane could fly only 300 miles in the same amount of time. Find the rate of the plane in calm air and the rate of the wind. I cant figure out how to solve this. Please help

    asked on February 24, 2010
  65. english

    what is the verb phrase in this sentence-Do you know the meaning of its letters?

    asked on February 2, 2009
  66. physics

    The body of a 1258 kg car is supported on a frame by four springs. The spring constant of a single spring is 1.31 × 104 N/m. Four peo- ple riding in the car have a combined mass of 230 kg. When driven over a pothole in the road, the frame vibrates and for

    asked on January 31, 2013
  67. Algebra

    Solve the logarithmic equation. log2(4x)-log2(x+3)=1

    asked on July 29, 2011
  68. math

    Omar wants to buy a double scoop ice cream cone. His favorite flavors are vanilla, strawberry, raspberry and chocolate. A combination with both scoops of raspberry represents ___ out of ___ possible combinations.

    asked on January 17, 2011
  69. Java programming

    How can I do the math specifically on this The water rates vary depending on the type of usage. A code of H means home use, a code of C means commercial use, and a code of I means industrial use. Any other code value should be treated as an error. Water

    asked on February 4, 2018
  70. College algebra

    What is the domain for X³+2X²-9X-18

    asked on October 15, 2012
  71. Marketing

    Which of the following statements describes how price relates to profit? A. The lower the price is set, the lower the profit will be. B. The prices a business sets for products and services help in determining the profit of the business. C. A good or

    asked on September 9, 2014
  72. bioethics

    For my bioethics class I need to create a "political" cartoon about clinical trials. (I say "political" because it's not really about politics, just the general format of a political cartoon.) I was trying to think of something related to placebos maybe,

    asked on October 27, 2010
  73. History

    I have to write a page report explaining how the 1920s laid the foundation for today's society. I just wanted to know if the stuff I am adding in my essay are relevant. I was going to include how people in the 1920s started putting stuff on credit via

    asked on September 12, 2014
  74. College Physics

    How many gallons of Oil would be in a cylindrical tank that was 24 feet long and had a diameter of 6 feet if the oil was 6 inches deep at the bottom of the tank?

    asked on September 10, 2014
  75. math

    In a game of blackjack, each player is dealt two cards from a standard 52-card deck. If the first card is 10 of clubs, what is the probability that the second card is heart?

    asked on April 21, 2011
  76. physics

    A hot stell ball of mass 1 kg is dropped into a 4 L bucket of water at room temperature (70 degrees F). If the system reaches an equilibrium temperature of 320 K, what was the initial temperature of the steel ball before it was dropped into the water? Cp

    asked on March 19, 2011
  77. Math

    last year the back gammon club had 30 members. this year the club has 24 members. find the percent of decrease in the number of members please help!!!!! it has to be done by tomorrow for school!!!!

    asked on April 11, 2018
  78. History

    I am home schooled and I am suppose to ask people their ideas on how to solve the Social Security problem. It says in my book the population of working Americans is not growing quickly enough to fund continued increases in Social Security spending. At some

    asked on September 11, 2014
  79. Excelsior

    he following transactions occurred during March 2009 for the Wainwright Corporation. The company owns and operates a wholesale warehouse. 1. Issued 30,000 shares of common stock in exchange for $300,000 in cash. 2. Purchased equipment of a cost of $40,000.

    asked on January 28, 2014
  80. org. chem

    Draw the acetal obtanined from 1-propanol and benzaldehyde Draw the ketal obtained from 2-propanol and 3-methylcyclpentanone Can someone tell me where the actal/ketal comes from or do I just add it to the equation. Not sure how to start this. Thanks :)

    asked on February 11, 2013
  81. Math

    A florist has access to 9 types of flowers and 8 types of foliage. He makes bouquets using 4 types of flowers and 3 types of foliage. How many different bouquets can he make?

    asked on April 17, 2011
  82. algebra2

    What is the value of x in the solution to the system y = 4x + 3 and 3x + 2y = -16? (Round to the nearest integer if necessary.)

    asked on February 1, 2011
  83. math

    how long will it take to earn 525$ in interest if $3500 is invested at a 6% annual interest rate?

    asked on January 26, 2011
  84. Math

    Using his driver on the 7th tee, Chris hits an excellent shot, right down the middle of the fairway. The ball follows the parabolic path shown in the figure, described by the quadratic function: h(x)=0.5x-0.002x^2. This relates the height, h, of the ball

    asked on December 4, 2016
  85. organic chem

    Amide formation: draw the structure (or provide the IUPAC name) of the amide formed (appropriate coupling reagent required) between benzoic acid and N-ethyl ethanamine (diethyl amine)

    asked on March 4, 2013
  86. organic chem

    Dehydrate the following a. 2-methyl-1-propanol b. 2-methylcyclohexanol c. 2-methyl-1-phenyl-1-propanol d. 1-methylcyclopentanol

    asked on February 21, 2013

    What are the economic advantages to government involvement in health care? What are the economic disadvantages? What are some ways of curbing the negative impact of rising health care costs on an economy?

    asked on June 4, 2009
  88. physics

    A man stands on the roof of a 19.0 m tall building and throws a rock with a velocity of magnitude 30.0 m/s at an angle of 30.0 degrees above the horizontal. Ignore air resistance. Calculate the horizontal distance from the base of the building to the point

    asked on September 14, 2011
  89. Physics

    a person's metabolic processes can usually operate at a power of 6 W/kg of body mass for several hours at a time. If a 60 kg woman carrying a 12 kg pack is walking uphill with an energy-conversion efficiency of 20 percent, at what rate, in meters/hour,

    asked on March 8, 2014
  90. 5th grade math - multiplying decimals

    Marlon's desktop measures 0.57 meters by 1.45 meters. that is the ares of his desktop? I came up with .8265 is this correct? I thought that the answer should be more than one.

    asked on February 10, 2010
  91. US History help

    when does a person or family become American? If you mean a United States citizen, either at birth (in the USA or abroad to at least one USA citizen parent), or when "naturalized" by having a certain period of legal residency, applying, passing an

    asked on September 4, 2005
  92. Math

    Find the volume of the largest right circular cylinder (in units^3) that fits in a sphere of radius 4 units.

    asked on April 7, 2018
  93. Chemistry

    Write the reduction half reaction for the redox reaction below. ClO-(aq) + I-(aq) => Cl-(aq) + I2(s) Is I- being reduced since Cl is losing an O?

    asked on January 13, 2015
  94. Marketing

    I am creating my own company (clothing store) and have to create a circle graph and frequency table, and explain how they can help my company. I don't know what to put in them. I know a circle graph is often choosen to compare things like the cost of

    asked on September 27, 2014
  95. org. chem

    How to start these problems out: Please help thank you Use the Henderson-Hasselbach equation: pH = pKa + log [A-]/[AH], where A- is the conjugate base and AH is the weak acid. Calculate the pH of an acetate buffer in which the acetate concentration

    asked on February 8, 2013
  96. math

    use the method of Gauss to find the sum. 2+4+6+...+300 is it 300(300+2)/2 = 45300

    asked on May 10, 2010
  97. Math

    One grocery clerk can stock a shelf in 40 min, whereas a second clerk requires 20 min to stock the same shelf. How long would it take to stock the shelf if the two clerks worked together? Is this how you do this: t/40 +t/24 =1 t*3/40*3 + t*5/24*5 =1 3t/120

    asked on March 24, 2010
  98. math

    A graphics designer wants to use a star-shaped polygon with 10 points and a point angle of 12 degrees. What should be the dent angle of this polygon?

    asked on March 10, 2010
  99. 5th grade fractions

    Attendance at the Fireman's Ball has been declining. Each Year, the number attending is 2/3 of the previous year's attendance. In what year will the attendance be less than 1/3 the original attendance?

    asked on January 25, 2010
  100. organic chem

    Draw and give IUPAC name the products of dehydration of 2-ethyl cyclopentanol I know you can't draw it but the name or even how to draw this would be appreciated

    asked on March 3, 2013


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