sheila

Popular questions and responses by sheila
  1. chemistry

    You are analyzing a solid isolated from a reaction and find that its boiling point is over 1000 ∘C. You dissolve the compound in water solution and recrystallize it to produce some solid crystals that you use to determine that the compound is a

    asked on January 23, 2014
  2. english

    Which of the following would most likely be an entry in a sentence outline? A. Education beyond high school versus education beyond college B. Education as a pathway C. Education as a tool D. Education can change a person's life.

    asked on April 15, 2015
  3. microeconomics

    If for a firm MRP > MFC, then the firm: a. is maximizing profits and should continue producing its current output. b. is maximizing factor costs and therefore is maximizing profits. c. should produce more output by increasing the quantity of factors

    asked on August 18, 2007
  4. esl

    Why do we say "he is average height" and not he has average height". don't we use have for a noun and is for an adjective?

    asked on October 2, 2015
  5. Math

    Ten students achieve the following test scores on an exam: 78, 69, 45, 89, 74, 37, 99, 77, 100, 82. What is the interquartile range of these scores?

    asked on April 17, 2017
  6. Chemistry

    How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep it from freezing at -20 oC? Kf = 1.86 oC/m.

    asked on February 3, 2015
  7. prealgebra

    A number equals six less than four times a number. What is the number?

    asked on December 3, 2013
  8. prealgebra

    One cellular phone carrier charges $26.50 a month and $0.15 a minute for local calls. Another carrier charges $14.50 a month and $0.25 per minute for local calls. For how many minutes is the cost of the plans the same?

    asked on December 3, 2013
  9. chemistry

    given 2CH3OH+3O2->2CO2+4H2O 1. Calculate number of grams of CH3OH required to react with 34.0L of O2 at STP. 2. How many liters of CO2 at 18 degrees Celcius and 6.94 atm are produced when 3.40 mol of CH3Oh is burned completely. 3. What volume of CO2 is

    asked on November 13, 2012
  10. Statistics

    A recent survey found that 72% of all adults over 50 wear glasses for driving. In a random sample of 100 adults over 50, what is the mean and standard deviation of the numbe who wear glasses?

    asked on March 29, 2012
  11. MATH! PLEASE REPLY ASAP!

    OPQRS is a regular square-pyramid whose base has sides of 7 cm. Given that the total surface area of the pyramid is 161 cm2, find its slant height.

    asked on January 23, 2011
  12. math

    Arrange the digits 5,6,7,8 and 9 in the boxes to make the greatest product

    asked on January 9, 2017
  13. MAT126: Survey of Mathematical Methods

    All numbers in our real number system are the product of prime numbers. Complete the following steps for this discussion: List the ages of two people in your life, one older than you and one younger than you. It would be best if the younger person was 15

    asked on December 20, 2013
  14. Physics

    A sandbag is dropped from the helicopter 125 m above the ground. What is its velocity at a height 60.0 m and when it hits the ground?

    asked on September 30, 2012
  15. Math Word Problem

    To make fruit punch, Edie mixes two kinds of juices in the following ratio: 1 cup of blueberry to 3 cups of red raspberry. How many cups of red raspberry will Eddie need to make 48 cups of fruit punch? How do you solve this? I was trying to divide 48 by 3

    asked on December 9, 2016
  16. Math M131A

    a rubber ball has the property that on any bounce it returns to 1/3 of the height from which it just fell. Suppose the ball is dropped from 108 ft How far has the ball traveled by the fourth bounce?

    asked on September 24, 2015
  17. Geometry

    ray OB is the bisector of angle AOC and ray OC is the bisector of angle BOD. m

    asked on September 5, 2013
  18. Physics

    Light travels at a speed 3x10^8 m/s. What distance does it travel in a time of 0.1s?

    asked on August 24, 2012
  19. microeconomics

    A firm that is perfectly competitve will continue to hire factor units as long as: a. MRP < MFC b. MRP > MFC c. VMP < MFC d. MC > MR

    asked on August 18, 2007
  20. Math

    6g + 8 - 3g - 2 simplify

    asked on September 17, 2019
  21. Chemistry

    What hydroxide concentration is required to (a) Initiate precipitation of Ag2CrO4 from a solution that is 2.12 x 10^-3 M in Ag+? (b) lower the Al^3+ concentration in the foregoing solution to 1.00 x 10^-9

    asked on January 29, 2019
  22. Fraction Test Question

    Here is a question I had on a test. 4x8 = 8x4 (8x4)=32 32x4= What could be another outcome of this answer? Answer choices had fractions in them.

    asked on December 6, 2016
  23. college, math

    Karen and Wayne need to buy a refrigerator because theirs just broke. Unfortunately, their savings account is depleted, and they will need to borrow money in order to buy a new one. Sears offers them an installment loan at 12% (add-on rate). If the

    asked on November 17, 2014
  24. writing algebriac expression

    The total amount of money (in cents) in y quarters, 7y dimes, and (2y - 1) nickles.

    asked on September 26, 2012
  25. physiology

    a One of the major physiological factors that triggers thirst is: a) a rise in plasma osmolarity b) a dry mouth from high temperatures c) becoming overly agitated d) drinking caffeinated beverages a

    asked on December 11, 2006
  26. pharmacy calculation

    A suspension contains 2400 mg of active drug in 1000 ml waht is the percentage of drug in the final product? what is the answer? Total mass is 1000g + 2.400g. Percent by mass (m/m)= 2.4 /1002 * 100

    asked on October 23, 2006
  27. Statistics

    1)A quiz consists of 8 multiple choice questions, each with 5 possible answers. If random guesses are made for all 8 questions, find the probability that a student will answer exactly 5 correctly. A. 0.999 B. 0.009 C. 0.990 D. There is not enough

    asked on August 5, 2019
  28. Math solving for x

    In the expression 4x squared + 7 what is the degree of 4x squared? How do I solve for X?

    asked on December 9, 2016
  29. Math Word Problem

    Riding on a school bus are 20 students in ninth grade, 10 students in tenth grade, 9 students in eleventh grade, and 7 students in twelfth grade. Approximately what percent of students on the bus are in ninth grade? How do I go about solving this?

    asked on December 9, 2016
  30. Chemistry

    Determine the number of molecules of the compound iron phosphate with 129.68 g Fe3(PO4)2

    asked on March 22, 2015
  31. CHEMISTRY

    Total Pressure in a vessel containing Oxygen collected over water at 25 *C was 723 torr. The Vapor Pressure of water at that Temperature is 23.8 torr. What was the pressure of gas?

    asked on October 5, 2014
  32. math

    Julius sold 5x as many computers as Sam sold last year. In total they sold 78 computers. How many computers did Julius sell. **Solve each problem by WRIING and solving the equation.

    asked on November 13, 2013
  33. math

    if each guest eats 2/3 of a small pizza, how may guests would eat 12 small pizzas.

    asked on November 3, 2013
  34. Physics Please help out

    Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and

    asked on April 24, 2013
  35. chemistry

    A sample of solid sulfur is heated with an electrical coil. If 105 joules of energy is added to a 12.4 gram sample initially at 24.4°C, what is the final temperature of the sulfur?

    asked on April 8, 2013
  36. math

    What multiplication fact could you use to find a number that can be divided equally by 8 and 9? My answer is 8 x 9 = 72. Is this correct?

    asked on February 14, 2012
  37. sentence skills

    which is the most effective coordinating conjunction to jointhe following independent clauses.... Miriam wants a digital picture frame,___________ she cannot afford one just yet. a) but b) for c) so d) and

    asked on May 26, 2011
  38. chemistry

    I need to write an equation that takes place at a temp of 400 K and with a catalyst of iron to make ammonia gas from gaseous nitrogen and hydrogen

    asked on May 21, 2011
  39. physics

    is fluid pressure constant?

    asked on March 29, 2011
  40. Math

    A square is folded in half to form a rectangle. If the resulting rectangle has a perimeter of 15 inches,what is the are of the original square?HELP...please?

    asked on September 16, 2010
  41. Physics

    Four charges are located at the corners of a square as shown below. Calculate the magnitude and direction of the net force on charge -3Q and charge 4Q. (sorry don't have picture, but it is of a square with corners -Q, 2Q, -3Q, and 4Q clockwise). I don't

    asked on May 13, 2010
  42. chemistry

    True or False? An equilibrium constant K_c=1x10^7 for a reaction indicates that the reaction favors product formation.

    asked on May 2, 2010
  43. 3rd grade

    shelby had $18.50. She spent $7.25 at the car wash. Write an expression that shows how much she spent.

    asked on November 7, 2009
  44. Data Management

    Does interchanging the independent and dependent variables change the correlation coefficient for the set of data

    asked on November 13, 2008
  45. health

    Explain the old protocol is fine but also need to : Explain the relationship of the new protocol with other existing polices, such as data collection, communication, privacy, and medical records. Include a high-level flow chart depicting the sequence of

    asked on August 15, 2008
  46. math

    i need help in solving these 2 problems...please help..thank you... Your home is built on a square lot. To add more space to your yard, you purchase an additional 4 feet along the side of the property. The area of the lot is now 9600 square feet. What are

    asked on January 29, 2008
  47. microeconomics

    Why does the marginal revenue product(MRP) curve slope downward for a perfectly competitive firm? a. because MRP=MR x MPP. After some point, as more of a factor is employes, the lower its MFC is; thus MRP declines b. Because MRP = MFC x MPP. After some

    asked on August 18, 2007
  48. MATH

    The weights of black bears are normally distributed with a mean of 264 kg and a standard deviation of 38 kg. Let X be the weight of a randomly selected black bear. Use this information for exercises 2 and 3. 2. If P(a < X < 264) = 0.1139, find the value of

    asked on August 5, 2019
  49. Statistics

    1)A quiz consists of 8 multiple choice questions, each with 5 possible answers. a. If a student guesses on all 8 of the questions, do the number of questions answered correctly form a binomial distribution? A. Yes B. No b. If "yes", give the mean (µ) and

    asked on August 5, 2019
  50. Statistics

    . A grocery story recorded amount of time that 20 randomly selected shoppers waited checkout lines. The mean was 322 seconds (5 minutes, 22 seconds) and the standard deviation was 48 seconds. Construct a 95% confidence interval for the mean wait time for

    asked on August 5, 2019
  51. Algebra

    Two cell phone companies have different rate plans. Run fast has monthly charges $8 plus $8 per gig of data. B A & D 's monthly charge is $15 plus $4 per gig of data. Your task is to determine under what circumstances each company has the better pricing.

    asked on April 29, 2019
  52. Precalculus

    How many radians are in a straight angle?

    asked on January 9, 2018
  53. geometry

    A tourist is standing in the center of a roof 1000 feet skyscraper wants to a photo of the top of the adjacent skyscraoer that is 1500 feet tall what is the angle of elevation from the tourist to the top of the skyscraper to nearest yenth

    asked on February 22, 2017
  54. Math Question from Teacher Exam

    Another crazy question on the exam. A teacher gives each child a picture card of an animal with a number. She tells the student to make the animal sound the number of times that matches the number on the card. What type of reasoning is the teacher

    asked on January 25, 2017
  55. Math Question from Teacher Exam

    The question- The teacher gives her students 8 faces and 7 smiles and tells them to match the smiles with the faces. What concept is the teacher helping her students understand? Is it one to one concept? One to many? or One more than? I think it is one

    asked on January 25, 2017
  56. math

    A test question I just had. Not sure of the correct answer. Which situations have equal outcomes? You can only have one answer. A. I can't remember B. You watch a movie with 20 min. preview and 99 min. movie vs. 19 min. preview and 100 min. movie. C. A

    asked on January 13, 2017
  57. Math

    On a test I was given 2 triangles. One triangle gave measurements of all three sides as 2, 4, and 5. The next triangle had sides given 4 and 8 and it asked what the third side should be if the triangles were perpendicular. How would I solve this? Do I find

    asked on January 13, 2017
  58. Area of a figure

    |_________16__________| |______10________| ________________ | * | * 4 * | * |________________* |______10________| This is a shape of a rectangle with a triangular point to the right. Width is 4, Length is 10 and 16 when you include the triangular point.

    asked on December 9, 2016
  59. Math Estimating Sides of a Triangle

    Use the diagram below to answer the question that follows. I couldn't copy the diagram into this. It basically shows a Triangle ACD with CD=100ft. Then another line intersects above angle A and reads BE= 30ft. AB=50ft. and BC=? That is the part it wants

    asked on December 7, 2016
  60. Math Question

    A Teacher gives each student a number. She tells the students to line up according to their number. Some students had trouble doing this. What knowledge of number operations are the students missing? Is the answer ordinal numbers?

    asked on December 6, 2016
  61. Third Grade Math

    Baseball teams Manatees won 4 more games than the Herons. They played 9 games in all. What is the fraction amount of games won for the Herons? I don't even know where to begin to solve this. I don't know how to figure out how to find 4 more. I know the

    asked on November 29, 2016
  62. Third Grade Math

    What fraction would these coins represent? 3 Quarters, 4 nickels, 2 dimes I can write a fraction for each of them. But I don't know how to write a fraction for all of them together. Can someone explain this to me?

    asked on November 29, 2016
  63. third grade Math

    Julie made 206 cookies. 142 were chocolate chip. write the amount of chocolate chip cookies into a fraction. I am not sure how to solve this. Can anyone help me?

    asked on November 29, 2016
  64. Math

    I don't get where u got the 1:80 from 2:20 the time left in math class? Why and how did u change 2:20 to 1:80? I'm 25 yrs out of school trying to help my 5th grade daughter

    asked on August 23, 2016
  65. maths

    mrs chan baked some cupcakes. She gave 1/6 of the cupcakes to her neighbour and 7/10 of this remaining cupcakes to her sister. If she had 12 cupcakes left, how many cupcakes did she bake together?

    asked on July 22, 2016
  66. Calculus 3

    I need help writing the series 4 + 1/5 + .3 + 1/(3 + sqrt 2) + 1/(9+ sqrt 3) + 1/(27 + sqrt 4) + 1/(81 + sqrt 5 .... I have played with using irrational numbers, natural log and a vast variety of exponential arrangements. Any help to get me going in the

    asked on May 3, 2016
  67. biochem

    why do lipids less dense than proteins? PLEASE HELP ME ANSWER THIS QUESTION. it really makes me wonder because lipids are much larger molecule compare to protein molecule but why protein is denser?

    asked on February 22, 2016
  68. Math

    Denise is saving for a new bicycle. The bike cost $89 and she already has $54. What percent of the total cost of the bicycle has Denisa already earned (rounded to the nearest whole percent)

    asked on January 6, 2016
  69. Calculus

    How do I solve for the investment of 20,000 with an interest rate of 7.5 compounded annually for 10 years? This is what I have so far and I don't know if I'm using the right formula. n=10 and I=r=0.075 A=P(1+i)n =20,000(1+0.075)10 This is where I'm stuck

    asked on September 8, 2014
  70. math

    length of blanket is 80 inches and width is 60 inches,how long the border has to be to go around the edge of the blanket?

    asked on May 27, 2014
  71. maths literacy,geography,lifescience,,agricultural

    which career can i pick with this subjcts

    asked on February 28, 2014
  72. Greatest Common Factor

    There sre 16 rocks that are green and 24 rocks that are blue. Sharon is dividing her green and blue rock collection into bags. Each bag will contain the same number of each color of rock. How many rocks of each colr will be in each bag?

    asked on February 8, 2014
  73. advanced pre algebra

    -6 >/= to g + 4

    asked on December 10, 2013
  74. algebra

    One cellular phone carrier charges $26.50 a month and $0.15 a minute for local calls. Another carrier charges $14.50 a month and $0.25 per minute for local calls. For how many minutes is the cost of the plans the same?

    asked on December 3, 2013
  75. prealgebra

    Four times a number is 21 more than the number. What is the number?

    asked on December 3, 2013
  76. math

    write -5.5 recurring as a fraction or mixed number in simplest form.

    asked on November 3, 2013
  77. math

    Find the complex zeros of the polynomial function, and write f in factored form: f(x)= x^3 - 8x^2 + 30x - 36

    asked on August 21, 2013
  78. math urgent please

    i think I know the answer to this question but could u please explain it to me how much smaller is the digit in the thousands place than the digit in the ten thousands place in the number 55,512 is the answer 10. could u help explain it

    asked on August 12, 2013
  79. basic math

    i think I know the answer to this question but could u please explain it to me how much smaller is the digit in the thousands place than the digit in the ten thousands place in the number 55,512 is the answer 10. could u help explain it

    asked on August 12, 2013
  80. math

    (3)-3=

    asked on June 20, 2013
  81. algebra

    how many turn around points are in the function f(x)=(x-1/3)^2(x-2)^3

    asked on May 17, 2013
  82. Physics conceptional question Please help

    Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and

    asked on April 24, 2013
  83. Physics PLEASE HELP

    When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted electrons is 1.50eV. What is the work function of the metal? W0 in eV

    asked on April 24, 2013
  84. Physics

    A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 275keV . What was the energy of the photon? E=in MeV What was the wavelength of the photon? wavelength in m Please help thank you!

    asked on April 23, 2013
  85. Physics

    Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and

    asked on April 23, 2013
  86. Physics

    When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted electrons is 1.50eV. What is the work function of the metal? W0 in eV

    asked on April 23, 2013
  87. Physics

    When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted electrons is 1.50eV. What is the work function of the metal? W0 in eV Please someone help me out. Thank you.

    asked on April 22, 2013
  88. Physics

    Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and

    asked on April 22, 2013
  89. chemistry

    80g of NaCl are dissolved in 400g H2O. if the vapor pressure of the water is 40 mmHg , what is the vapor pressure of NaCl above the solution?

    asked on February 12, 2013
  90. math

    Which of the following salaries will have a purchasing power of $24,035 if the inflation rate is five percent?

    asked on January 24, 2013
  91. Math

    The cheetah can 60 miles per hour. How many miles the can run for every half. Hour up to 2 hours?

    asked on January 24, 2013
  92. science

    what is the difference between weathering and erosion

    asked on January 7, 2013
  93. algebra

    12square root(-10)^12

    asked on December 26, 2012
  94. HCR/210

    I need to find information pertaining to handling aeministrative data that a doctor does NOT need to see.

    asked on December 14, 2012
  95. Physical Science

    If liquid pressure were the same at all depths, would there be a buoyant force on an object submerged in the liquid?

    asked on October 23, 2012
  96. PHYSICAL SCIENCE

    How do the pressure variation with depth affect our ability to explore the ocean?

    asked on October 22, 2012
  97. algebra

    hi i need help on these problems..i have tried online to do it myself but i still don't understand what they are asking... compare the numbers in each exercise using an inequality symbol.. 4/5, square root of 1.3 pie, 19/6

    asked on September 17, 2012
  98. Chemistry

    What chemical compound is formed in the reaction when 6M HCl and 1M NaOH is reaction?

    asked on August 30, 2012
  99. Physics

    The average speed of a truck is 60.0km/h. How long does it take for the truck to travel 265km?

    asked on August 24, 2012
  100. Algebra

    Simplify. Please show all work. 6b^2 - 4b + 3b^4 - (7b^3 + b^4 - 4b)

    asked on June 20, 2012

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