Popular questions and responses by Jeff
  1. Operations Management

    Joe Henry's machine shop uses 2,500 brackets during the course of a year. These brackets are purchased from a supplier 90 miles away. the following information is known about the brackets. annual demand 2,500 holding cost per bracket per year $1.50 order

    asked on July 6, 2011
  2. math

    he last time Nkechi was at school was on Saturday. She was first absent for four days before that. Today is Tuesday, 27th of September. When was Nkechi first absent? Give the day and date.

    asked on October 10, 2016
  3. math

    Sara drives 72 miles on 3.2 gallons of gas. She uses this information to calculate how many miles per gallon she can drive. Using this result, how many miles can Sara drive on 13.3 gallons of gas?

    asked on April 9, 2014
  4. calculus

    7. A cardboard box manufacturer wishes to make open boxes from rectangular pieces of cardboard with dimensions 40 cm by 60 cm by cutting equal squares from the four corners and turning up the sides. Find the length of the side of the cut-out square so that

    asked on July 30, 2011
  5. mathematics

    A miniature portrait of George Washington is square and has an area of 169 square centimetres. How long is each side of the portrait? *

    asked on July 30, 2020
  6. Math-probabilities

    The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Cause Deaths

    asked on April 26, 2016
  7. Physics

    A 0.62-mm-diameter copper wire carries a tiny current of 2.0 μA . The molar mass of copper is 63.5 g/mole and its density is 8900 kg/m3. NA=6.02×1023 Estimate the electron drift velocity. Assume one free electron per atom.

    asked on March 4, 2018
  8. Calculus

    An isosceles triangle has a vertex at the origin. Determine the area of the largest such triangle that is bound by the function x^2 + 6y = 48. So, y=8 when x=0 making a vertical side equal to 8. I also determined that there is a zero at =/- the square root

    asked on March 20, 2010
  9. physics

    A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 6.10s later. What was the rocket's acceleration?

    asked on September 6, 2008
  10. calculus

    The driver of a car traveling at 60 ft/sec suddenly applies the brakes. The position of the car is s(t) = 50t - 2t2, t seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop?

    asked on January 22, 2015
  11. algebra

    Andrea is making a sandbox.She has made a wooden frame in her backyard that is 6 feet long, 6 feet wide, and 2 feet deep. She can purchase sand for $30 per cubic meter. How much will it cost for her to purchase sand? Hint: 1 foot equals 0.3048 meters.

    asked on May 25, 2018
  12. trigonometry

    the bases of a trapezoid are 22 and 12 respectively. The angles at the extremities of one base are 65^ and 40^ respectively. Find the two legs

    asked on September 1, 2013
  13. business math

    The French company has a beginning inventory of $77,000 and an ending inventory of $80,000. sales were $280,000. assume French's markup rate on the selling price 40%. based on the selling price what is the inventory turnover at cost. please explain?

    asked on January 23, 2015
  14. Microeconomics

    Four roommates are planning to spend the weekend in their dorm room watching old movies, and they are debating how many to watch. Here is their willingness to pay for each film: Orson Alfred Woody Ingmar Frist film 7 5 3 2 Second film 6 4 2 1 Third film 5

    asked on September 29, 2006
  15. Trigonometry

    If a point on the Cartesian plane lies at (4, 2), what is the angle made between the line containing the point and the origin, and the negative y-axis? a) 1.249 radians b) 0.463 radians c) 0.523 radians d) 1.047 radians

    asked on June 18, 2020
  16. math

    A manufacturer of light bulbs knows that 3% of the production of their 60W bulbs will be defective. What is the probability that exactly 5 bulbs in a carton of 144 will ne defective?

    asked on January 26, 2011
  17. chemistry

    A sample of hydrogen gas was collected over water at 36°C and 855 mmHg. The volume of the container was 6.50 L. Calculate the number of moles of H2 collected. (Vapor pressure of water is 44.6 torr at 36°C)

    asked on August 15, 2009
  18. Reading Skills

    In American society, romantic love is considered the main reason for people to marry. On the other hand, in some societies, romantic love is considered a form of obsession or madness. In fact, even in many societies where "true love" is not considered a

    asked on December 16, 2013
  19. language arts

    what are some examples of benign foods

    asked on August 16, 2015
  20. Math

    How many different paths will spell the word BINOMIAL in the following arrangement(moving diagonally downwards to the left or right)? B I I N N N O O O O M M M I I A L L My Answer: Starting from B using Pascal's Triangle B 1 1 1 2 1 1 3 3 1 4 6 4 10 10 20

    asked on January 9, 2011
  21. Calculus

    The rate at which water flows into a tank, in gallons per hour, is given by a differentiable, increasing function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t (hours) 0 2 3 7 8 R(t) (gallons per hour)

    asked on May 10, 2018
  22. Physics

    The x component of vector is 5.3 units, and its y component is -2.3 units. The angle that vector makes with the +x-axis is closest to

    asked on December 11, 2017
  23. Reading Skills

    The answer to this question IS NOT "B". What is the answer to the following question. Inside the bus, in his summer Class-A uniform with its brass glitter and infantry-blue shoulder cordon, Jamie Sabin was going home. Fort Benning would be a fading dream;

    asked on December 17, 2013
  24. Organic chemistry

    compound with a molecular formula C8H16O has the following H-nmr spectrum: 3H triplet at 0.90, 1.0 to 1.6 8H multiplet, 2.05 3H singlet, 2.25 2H triplet. What is the structure of this compound? I think it is 2-octanone but not sure

    asked on June 20, 2009
  25. math

    One leg of a right triangle has a length of 15 m. The other sides have lengths that are consecutive integers. Find the number of meters in the perimeter.

    asked on October 22, 2018
  26. physics

    A wire that is 70 cm long, carrying a current of 6.5 A, is at right angles to a uniform magnetic field. The magnitude of the force acting on the wire is 0.60 N. What is the strength of the magnetic field?

    asked on March 10, 2013
  27. Math

    Jeff is changing the shape of his sandbox from 10 feet long by 12 feet wide to a square that has the same area. What is the perimeter of the square sandbox, rounded to the nearest hundredth?

    asked on July 16, 2012
  28. Trig

    Simplify: (cosx + cos2x + cos3x + cos4x + cos5x + cos6x) / (sinx + sin2x + sin3x + sin4x + sin5x + sin6x) into a single Cotangent function. Using the sum-to-products, I was able to get remove some of the addition in attempts to get full multiplication, but

    asked on November 16, 2010
  29. Physics

    Does blue light or orange light have a larger index of refraction? Blue light is bent more by a prism than orange light. Does blue light or orange light have a larger index of refraction in glass? A. Blue B. Orange If you know the answer to this, could you

    asked on October 29, 2009
  30. Physics

    What is the magnitude of the electric field at a point midway between a −8.3μC and a +5.4μC charge 10cm apart? Assume no other charges are nearby.

    asked on February 11, 2018
  31. Chem

    Calculate ΔG∘ at 298 K for the following reactions. A) Ca(s)+CO2(g)+12O2(g)→CaCO3(s) B) 2KClO3(s)→2KCl(s)+3O2(g) C) CO(g)+H2O(g)→H2(g)+CO2(g)

    asked on May 14, 2014
  32. math

    Carlos hiked 1 and 3/4 miles along a nature trail to a fork in the trial. He than hiked 2 and 1/2 along a path that led to a waterfall. When carlos reached the waterfall, how far had he hiked altogether?

    asked on May 7, 2012
  33. chemistry

    a) how much heat is required to convert the ice to water that is also 0.00 C? b) how much heat would be required to warm this water from 0.00 C to 17.50 C? HELP!! I think the fusion is 333 J/g at 0 C... But I'm not sure what to do with that.

    asked on September 7, 2008
  34. Math

    A street light is at the top of a 16 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 8 ft/sec along a straight path. How fast is the tip of her shadow moving along the ground when she is 30 ft from the base of the pole? How fast is

    asked on November 12, 2015
  35. Algebra

    What are the first four terms of an arithmetic sequence if the common difference is 1.5 and the first term is 15? 15,30,45,60 15,16.5,18,19.5 15,22.5,33.75,50.625 none of the above What are the first four terms of a geometric sequence if the common ratio

    asked on March 9, 2015
  36. Chemistry

    Consider the following reaction at constant P. Use the information here to determine the value of ΔSsurr at 398 K. Predict whether or not this reaction will be spontaneous at this temperature. 4 NH3(g) + 3 O2(g) → 2 N2(g) + 6 H2O(g); ΔH = -1267 kJ

    asked on May 5, 2014
  37. Math

    What is the solution to the inequality below? 12x > 6(x - 2)

    asked on January 15, 2014
  38. LA

    What was the Supreme Court's ruling on the Dred Scott case? Dred Scott should be considered free since he had lived in many states where slavery was banned. Dred Scott could be free if he paid a fee. Dred Scott was still a slave and not a citizen. The case

    asked on April 10, 2013
  39. Chemistry

    Empirical formula 12.67 aluminum, 19.73 nitrogen, 67.60 oxygen

    asked on March 26, 2012
  40. business mathematics

    What is the cash discount and net amount paid if the gross amount of the invoice or freight paid is 7000$, freight charged is 100$, date of invoice is 4/8, terms of service is 2/10, n/60, and date of payment is 4/15?

    asked on February 13, 2012


    asked on January 25, 2012
  42. Henry3

    Suppose someone invents a new unit of length called a zizzle. If 3.5 zizzles = 1 meter, what is 11.9 zizzles/s in km/hour?

    asked on September 1, 2011
  43. chemistry

    A galvanic cell has an iron electrode in contact with 0.20 M FeSO4 and a copper electrode in contact with a CuSO4 solution. If the measured cell potential at 25 degrees Celcius is 0.61 V , what is the concentration of Cu2+ in the CuSO4 solution?

    asked on May 17, 2011
  44. physics

    1100g of ice at -50C is mixed with 100g of steam at 120C. Find out how much ice melts? The implied final temperature is 0C. Cice=0.5 Csteam=0.46 Hv=539 Hf =80 here is my work 1100(0.5)(0+50)+80m = 100(0.46)(120-0)+540(100) i am not getting the right answer

    asked on December 5, 2009
  45. Business

    Using the financial statements for the Goodyear Calendar Company, calculate the 13 basic ratios found in the chapter. GOODYEAR CALENDAR COMPANY Balance Sheet December 31, 2008 Assets Current assets: Cash . . . . . . . . . . . . . . . . . . . . . . . . . .

    asked on November 9, 2009
  46. Chemistry

    In alcohol fermentation, yeast converts glucose to ethanol and carbon dioxide C6H1206 -----> 2C2H5OH + 2CO2 If 5.97 g of clucose are reacted and 1.44 L of CO2 gas are collected at 293 K and .984 atm, what is the percent yield of the reaction?

    asked on October 31, 2007
  47. Trigonometry

    If the central angle is 4pi/3 radians, what should the radius of a circle be to make the arc length 1 m? a) 0.424 m b) 0.238 m c) 2.356 m d) 4.188 m I think it is c)... is that correct?

    asked on June 18, 2020
  48. math

    how does 11+3=2?

    asked on May 23, 2020
  49. chemistry

    how much energy is required to convert 10g of ice at -15c into steam at 125c

    asked on October 30, 2019
  50. Math

    Find the set of all z such that neither 2+z nor 2-z is in the interval (-1,1]. Express your answer as an interval or as a union of intervals.

    asked on November 28, 2016
  51. Physics

    An arrow is shot from a height of 1.5 m toward a cliff of height . It is shot with a velocity of 30 m/s at an angle of 60 deg above the horizontal. It lands on the top edge of the cliff 4.0 s later. (a) What is the height of the cliff? (b) What is the

    asked on January 31, 2016
  52. Organic Chemistry

    How am I supposed to do these questions? I'm completely lost. A 0.120 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 130.0 g/mol. (b) What is the

    asked on November 8, 2015
  53. chemistry

    Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI. Include phases. What mass of precipitate will form if 1.50 L of highly concentrated Pb(ClO3)2 is mixed with 0.350 L of 0.290 M NaI? Assume the reaction goes to completion.

    asked on October 10, 2015
  54. Algebra Help URGENT Please?

    Jamie is a salesperson in a shoe store and earns $95 per week, plus 20% of her weekly sales. If Jamie makes $475 in one week, what are her sales for that week?

    asked on November 11, 2014
  55. Math Algebra

    The coordinates of quadrilateral VXY Are given below. Find the coordinates of its image after a dilation with the given scale factor V(6, 2), W(-2, 4), X(-3, -2), Y(3, -5) scale factor of 2 This question is confusing me and is worth 3 points please help :)

    asked on October 18, 2014
  56. physics

    Storms in the South Pacific can create waves that travel all the way to the California coast, which are 12,000 km away. How long does it take them if they travel at 15.0 m/s?

    asked on November 13, 2012
  57. Chemistry

    Nickel carbonyl has a formula: Ni(CO)4. Nickel carbonyl is produced by the reaction of solid nickel metal with carbon monoxide gas. 1. how do you write a balanced equation for this reaction? 2. How many liters of carbon monoxide gas must be provided to

    asked on November 19, 2011
  58. chemistry

    How many grams of oxygen are required to react with 0.128 lead(II) sulfide?

    asked on April 8, 2010
  59. College Physics

    The only force acting on a 3.9 kg body as it moves along the positive x axis has an x component Fx = - 6x N, where x is in meters. The velocity of the body at x = 3.0 m is 8.0 m/s. (a) What is the velocity of the body at x = 4.0 m? (b) At what positive

    asked on October 25, 2009
  60. physics

    An arrow with a mass of 0.12 kg is pulled back in a bow. After being held still, it is let go, moving at 23m/s after the 0.51meters in which the arrow is in contact with the bow string? What work was done on the arrow by th bow string? What force was

    asked on November 2, 2008
  61. Science

    What happens to the heat that is produced during an energy transformation?

    asked on May 28, 2020
  62. Math

    Please help me with the following question. 2/3 people surveyed prefered super-popper popcorn. 7036/10554 people surveyed prefered super-popper popcorn. Twice as many people surveyed prefered super-popper popcorn. 3518 more people prefered super-popper

    asked on May 27, 2020
  63. Math

    2/3 people surveyed prefered super-popper popcorn. 7036/10554 people surveyed prefered super-popper popcorn. Twice as many people surveyed prefered super-popper popcorn. 3518 more people prefered super-popper popcorn. How are the numbers in each

    asked on May 26, 2020
  64. Math

    A circular target is divided into nine parts of equal area by eight concentric rings. If the radius of the target is 27 cm, find the radius of the inner circle. What is the ratio of the area of the inner circle to the area of the whole target? What is the

    asked on May 21, 2020
  65. Math

    A licence plate starts with 3 letters. If possible letters are M, N, P, Q, R, S, T. How many different permutation of these letters can be made if no letter used more than once.

    asked on April 7, 2019
  66. English

    Which type of figurative language is found in lines 6 and 7? (1 point) symbol metaphor personification* (my awnsor) simile What can you conclude from the figurative language you identified in the previous question? (1 point) The flowers’ smell was too

    asked on February 27, 2019

    To rule his empire successfully, Hammurabi instructed his own governors A to teach local rulers B to rule distant cities C to train his sons to rule. B to cut off communication with the outside world

    asked on September 25, 2018
  68. english

    compare and contrast the words maneuver and manipulate

    asked on September 20, 2015
  69. Physics

    Two airplanes leave an airport at the same time. The velocity of the first airplane is 730 m/h at a heading of 44.6 degrees. The velocity of the second is 610 m/h at a heading of 100 degrees. How far apart are they after 2.3 h? Answer in units of m.

    asked on September 18, 2015
  70. algebra

    Susan is on her way home in her car. She has driven 24 miles so far, which is one-half of the way home. What is the total length of her drive?

    asked on June 29, 2015
  71. Math - Ratio

    A map scale is 1:10,000. Find the actual distance in centimetres represented on a map by 5cm. Convert your answer to metres and kilometres.

    asked on January 13, 2015
  72. Algebra Help please?

    what is the value in "x" in 16^2 = x

    asked on December 6, 2014
  73. Science plz?

    Identify the process that is necessary for sexual reproduction, explain why it is necessary, and identify how this process increases genetic variation.

    asked on November 10, 2014
  74. Finance

    The Fridge-Air Company's preferred stock pays a dividend of $4.50 per annually. If the required rate of return on comparable quality stocks is 14 percent, calculate the value of Fridge-Air's preferred stock.

    asked on August 5, 2014
  75. Science

    What is a substance that cannot be separated into simpler substances by physical or mechanical methods such as filtering, boiling, or sifting?

    asked on October 25, 2013
  76. statistics

    Archie must travel to a foreign country where a deadly strain of flu has ravaged the population. Already, 34% of the population has succumbed to the flu and died. There is a vaccine, but because the flu is extremely contagious, it spreads quite rapidly,

    asked on August 2, 2013
  77. calculus

    please help me Asap In 1970, the total enrollment in public universities and colleges in a country was 5.1 million students. By 2004, enrollment had risen to 14.3 million students. Assume enrollment can be modeled by exponential growth. (a) Estimate the

    asked on May 16, 2013
  78. science need help

    2 H2 + O2 = 2H2O 2 grams + 32 grams=_ _ _ _ _grams how would the mass of water formed in the reaction compare to the mass of oxygen and hydrogeb that reacts. in your response be sure to: include they type of change illustrated in the balanced eqaution

    asked on April 1, 2013
  79. trig

    solve equation for the exact solutions if possible put answer in degrees. 2tanx/3-tan^2x=1

    asked on May 30, 2012
  80. Chemistry

    Consider the following unbalanced reaction. P4(s) + F2(g)---> PF3(g) How many grams of F2 are needed to produce 114 g of PF3 if the reaction has a 80.3% yield? I've worked it every way I can think, and the online grader says I am wrong. Someone plz lend me

    asked on September 13, 2011
  81. early childhood education

    1. Small group discussions with preschools enables them to: A. Find out if they are superior B. Learn to argue C. Outsmart the others and gain teachers attention D. Compare their ideas with peer ideas I choose D 2. Children with many experience with

    asked on August 16, 2011
  82. geo 2

    if ABCD is a square and DB is equal to 12 cm, then AC is equal to 6 cm.

    asked on March 31, 2011
  83. math (trig)

    if cos 2 theta = -(1/3) and theta is in Quadrant 2, find sin theta, cos theta, tan theta, and draw triangle theta

    asked on January 20, 2011
  84. math 65

    how do i change a fraction to a decimal

    asked on January 18, 2011
  85. spanish

    I have a question about this phrase translated to Spanish. "Well, yes. I enjoy studying Spanish very much." Is it this way? Pues si, yo estudio espanol mucho. or Pues si, yo estudiar espanol mucho. using the infinitive form of estudiar. Thank you.

    asked on November 30, 2010
  86. 12th grade

    The area of a circle is 28.26 square centimeters. What is its diameter (use 3.14 for ð)?

    asked on July 20, 2010
  87. Personal Finance

    The Lees, a family of two adults and two dependent children under age 16, had a gross annual income of $68,000 for 2007. Determine their standard deductions, exemption, and child tax credit amounts, as well as their marginal and average tax rates assuming

    asked on January 28, 2010
  88. chemistry

    A sealed flask contains 0.40 g of water at 28 deg. celsius. The vapor pressure of water at this temperature is 28.36 mmHg

    asked on September 6, 2009
  89. Diagonalize

    construct a nondiagonal 2 x 2 matrix that is diagonalizable but not invertible. Just write down a diagonal matrix with one zero on the diagonal and then apply an orthogonal transformation. E.g. if you start with the matrix: A = [1 ,0 0,1] And take the

    asked on July 12, 2007
  90. Science

    factory produces cars -> cars are transported to vendor -> cars are driven Does the above process produce a small or a large amount of heat? At which point in the process is heat produced?

    asked on May 28, 2020
  91. Science

    1. Circle the devices that are energy converters. (a) television (b) pencil (c) calculator (d) magazine (e) hot plate (f) cell phone

    asked on May 28, 2020
  92. Math

    Please help. 2/3 people surveyed prefered super-popper popcorn. 7036/10554 people surveyed prefered super-popper popcorn. Twice as many people surveyed prefered super-popper popcorn. 3518 more people prefered super-popper popcorn. How are the numbers in

    asked on May 27, 2020
  93. Science

    List 5 differences difference between coal energy, nuclear energy, and hydroelectric energy.

    asked on May 27, 2020
  94. Math

    The area of triangle ABC is divided into four equal parts by segments parallel to the base BC. DC is 36 cm. A is the top point of the triangle. What is the ratio of the dimensions of triangle ADE to the dimensions of triangle ABC?

    asked on May 21, 2020
  95. Math

    Two spheres are used in a certain machine. One has a volume of 7 cm3 and the other has a volume of 189 cm3. The radius of the small sphere is what fraction of the radius of the large sphere? Which of the following represents the first step to solve this

    asked on May 21, 2020
  96. Math

    This question was already asked, but there wasn't any explanation provided. The dimensions of a pyramid are increased by 1100%. The percentage increase in surface area is The new dimensions are ___times the original dimensions, and the new surface area is

    asked on May 21, 2020
  97. Math


    asked on May 21, 2020
  98. Math

    If a triangle got 4x as large what is the percent increase? If a triangle got 12x as large what is the percent increase?

    asked on May 21, 2020
  99. math

    The sides of the pentagon are quadrupled, so they are now __ times as large. This means the area is now __ times as large. This is equivalent to an increase of __%.

    asked on May 20, 2020
  100. Mathematics

    Four times the larger of two consecutive even integers is ten less than the smaller What is the larger of these two numbers

    asked on May 17, 2020


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