Popular questions and responses by Melanie
  1. Jar Marbles

    A jar contains 5 red marbles, numbered 1 to 5, and 12 blue marbles numbered 1 to 12. a) A marble is chosen at random. If you're told the marble is red, what is the probability that it has the number 3 on it? b) The first marble is replaced, and another

    asked on October 9, 2016
  2. math

    rearrange A = 2 pi r (r+h) to make h the subject (cylinder)

    asked on October 28, 2016
  3. chemistry

    Consider the following reaction: I2(g) + Cl2(g) 2ICl(g) o Kp = 81.9 at 25 C. Calculate ∆Grxn for the reaction at 25 C under each of the following conditions: a Standard conditions. b At equilibrium. c PICl = 2.55 atm; PI2 = 0.325 atm; PCl2 = 0.221 atm.

    asked on April 18, 2013
  4. business math

    A local Barnes and Noble paid a $79.44 net price for each calculus textbook. The publisher offered a 20% trade discount. What was the publisher’s list price?

    asked on February 24, 2015
  5. Algebra

    Myra uses an inverse variation function to model the data for the ordered pairs below. (2, 30), (3, 20), (4, 15), (5, 12), (6, 10) Which statement best explains whether an inverse variation function is the best model for the data? An inverse function is

    asked on July 7, 2014
  6. Biology

    What is the target organs for Luteinizing Hormone and the Follicle Stimulating Hormone?

    asked on April 29, 2010
  7. Statistics

    A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following

    asked on November 14, 2012
  8. math

    There is a diagram of a running track. The track is made up of two straights and two semicircles. The radius of each semicircle is 35 meters. The length of the outer perimeter of the entire running track is 400 meters. Find the length of one of the

    asked on May 19, 2016
  9. Physics

    A photon having wavelength λ scatters off a free electron at A (see figure below), producing a second photon having wavelength λ'. This photon then scatters off another free electron at B, producing a third photon having wavelength λ'' and moving in a

    asked on June 17, 2015
  10. Chemistry

    At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.93 m by 2.28 m by 2.25 m?

    asked on August 29, 2016
  11. Chemistry

    1. How many moles of ammonia NH3 are produced when 0.45 moles of nitrogen N2 reacts? N2 + 3H2 yields 2NH3 2. How many mililiters of water will be produced when 2.05 g of hydrogen reacts? The density of water is 1.00 g/mL ? 2H2 + O2 yields 2H2O 3. What is

    asked on March 18, 2015
  12. Algebra

    Jordan uses a linear equation to model the data in a table. Which reasoning might Jordan have used in the decision to model the data with a linear equation? The products of corresponding x- and y-values are equal. The ratios of consecutive y-values are

    asked on July 7, 2014
  13. Pen Foster

    checking my answers in Introduction to Allied Health anyone have that one?

    asked on August 12, 2011
  14. Physics

    A sound wave in a solid has a frequency of 15.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air?

    asked on March 4, 2014
  15. Word Problems

    The manager has one type of coffee that sells for $5 per pound and another type that sells for $11 per pound. The manager wishes to mix 90 pounds of the $11 coffee to get a mixture that will sell for $10 per pound. How many pounds of $5 coffee should be

    asked on March 7, 2011
  16. Physics

    A 325 kg boat is sailing 15.0 degrees north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0 degrees north of east at a speed of 4.00 m/s. During this time three forces act on the boat: a 31.0 N force directed 15.0 degrees north of

    asked on October 14, 2010

    Which of the following gases occupy the smallest volume at STP? a 4.032 g H2 b 1.000 mol of carbon dioxide c 6.022 × 1023 molecules of O2 d 35.45 g Cl2

    asked on April 27, 2016
  18. Algebra

    I think this is a easy trick question, so I probably know the answer but I just wanted to double check. What is the domain and range of the function f(x) = 3^x Find the f^-1 and its domain and range? Thanks for your help.

    asked on August 7, 2011
  19. physics

    a 650 newton crate rests on the floor. how much work is required to move it at a constant speed, 3 meters against a friction force of 150 Newtons

    asked on March 22, 2011
  20. Math

    Solve each system x + 3y = 6 4x - 5y = 7 I need to know what x and y equal??

    asked on February 23, 2011
  21. Math

    You earn $7.25 per hour babysitting. Write and solve an inequality to find how many full hours you must work to earn at least $200

    asked on January 11, 2011
  22. History

    Why did the Roman republic use separation of powers in government? A. so the Senate could be the most powerful branch B. so no one branch would get too powerful C. so the magistrates could veto the assemblies D. so the plebeians could join the race of

    asked on December 12, 2018
  23. ART

    What is one characteristic of this student's work? ( woman's head by Iris v.) 1.creation of 3-D art 2.creation of cubist art 3.exact representation of human property 4.use of cool colors only

    asked on December 3, 2018
  24. English, Language Arts

    Please check my answers 1. In the play Crossroads: A Sad Vaudeville, the use of stage directions better helps the reader to observe the movements of a character. envision inside the mind of a character. understand how a character responds to a certain

    asked on October 9, 2016
  25. chemistry

    C3H6O + 4O2 --> 3CO2(g) + 3H2O(g) deltaH= -1790kJ the density of C3H6O is 0.79g/mL. HOw much heat is released by the combustion of 150mL of acetone?

    asked on November 3, 2015
  26. Statistics

    When estimating a population mean μ, where the population standard deviation σ is known, we can: a. choose a larger z value, construct a wider confidence interval, and achieve a lower confidence level b. choose a smaller z value, construct a narrower

    asked on November 14, 2012
  27. A=LxW

    Length of a rectangle is 13 cm less than 5 times it's width. Its area is 28 square cm. Find dimensions of rectangle

    asked on December 6, 2011
  28. History

    Which features of the Roman government limited individual power? Select all that apply. A. The Senate was the most powerful branch of government. B. The assemblies were a form of direct democracy. C. The two consuls could veto each other's actions.***** D.

    asked on December 5, 2018
  29. history

    Which is the most important lesson that can be learned from the Persian Wars? A. That Athens alone could have beaten Persia. B. That Persia was too powerful to ever defeat. C. That the Greek city-states should stay independent at all times. D. That a

    asked on November 29, 2018
  30. Chemistry

    A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calculate the mass of pure acetic acid in 460 mL of this solution at 20 C. Answer in units of g.

    asked on August 29, 2016
  31. Intro to computers 1

    Which logging category does not appear in Event Viewer by default? A. Application B. System C. Volume D. Security

    asked on June 10, 2016
  32. Math

    A sc tourists bureau survey showed that 75 % of those who seek information about the state actually come to visit . The office received 8 requests for information. What is the probability that probability that 4 to 6 inclusive of the people will visit sc?

    asked on October 9, 2015
  33. math

    Rick has a collection of 6 video games. He lets his best friend borrow: of his video game collection. Write two equivalent to this number Explain how you came fractions up with the fractions.

    asked on March 2, 2015
  34. math

    Adam wants to compare the fractions 129 6 and 1. He wants to order them from least to greatest and rewrite them so they all have the same denominator. Explain how Adam can rewrite the fractions.

    asked on March 2, 2015
  35. math

    at the beginning of the summer, conan had $180 in the bank. each week he deposits another $64 that he earns mowing lawns. is his account balance proportional to the number of week since he started mowing lawns?

    asked on January 2, 2013
  36. Algebra

    evaluate the function f(r)= sqrt25-r-6 at the given values of independent variables f(16), f(-x), f(25-2x) and simplify

    asked on March 16, 2012
  37. Math

    1) What is the slope of a line that is parallel to y = 2? 2) What is the slope of a line that is perpendicular to y = 2? 3) What is the slope of a line that is parallel to x = -4? 4) What is the slope of a line that is perpendicular to x = -4? I don't get

    asked on February 16, 2011
  38. st mags

    what are shallow places in the ocean called

    asked on September 23, 2010
  39. Geometry. Please help.

    1) Two angles are complementary. The measure of one angle is 21 more than twice the measure of the other angle. Find the measure of the angles. 2) If a supplement of an angle has a measure 78 less than the measure of the angle, what are the measures of the

    asked on August 30, 2011
  40. Chemistry

    How do you determine what ionic substance has more exothermic lattice energy? for example if you compare NaCl and KCl???

    asked on November 4, 2008
  41. history

    What is the main reason that Rome was built on hills? A. The hills had fertile farmland. B. The hills provided a natural defense.*** C. The hills were near a port. D. The hills were densely populated.

    asked on December 8, 2018
  42. history

    Which specific problem led Rome to change from a monarchy to a republic?

    asked on December 3, 2018
  43. history

    someone PLZ HELP ME! Why did the ancient Greeks use conquest, colonization, and trade? A. to build a strong and unified empire B. to stay isolated from other empires C. to establish a uniform currency D. to get the resources they needed to survive is it d

    asked on November 29, 2018
  44. math

    The chart below (Monday:2,600, Tuesday: 3,100, Wednesday: 2,800 and Thursday: 3,200)displays Jim's sales for the first four days of his work week. Jim's boss told him that he would get a promotion if his mean sales for Monday through Friday were at or

    asked on June 1, 2018
  45. chemistry

    Propane is used in BBQs and burns according to the following equation: C3H8 + 5O2 -> 3CO2 + 4H2O. If 2.2 moles of carbon dioxide are produced, how many moles of oxygen gas reacted?

    asked on February 3, 2016
  46. trig

    earth is 149 600 000 km from the sun. this distance is equal to 1 A.U (astronomical unit). Mars is seen form earth to make an angle of 68degrees with the sun. a) draw a diagram and label b)how far are earth and mars c) do you think the distance between

    asked on May 27, 2014
  47. Chemistry

    only one of each of the following pairs of reactants undergoes a reaction. Complete and balance the equation for the reaction that occurs. NaCl (aq) + BaCl2 (aq) --> Na2SO4 (aq) + BaCl2 (aq) --> NO3^- (aq) + OH^- (aq)+ Al (s) --> CO3^2- (aq) + OH^- (aq)

    asked on April 15, 2013
  48. Math

    In an experiment with light, Rodney used 6 square polarized filters, 3 in. on a side. What was the total surface area of the filters? Count one face only for each filter.

    asked on February 7, 2013
  49. Physics

    Stephanie serves a volleyball from a height of 0.78 m and gives it an initial velocity of +7.7 m/s straight up. How high will the volleyball go? The acceleration of gravity is 9.81 m/s^2. How long will it take the ball to reach its maximum height?

    asked on January 28, 2013
  50. math

    A drawer contains 4 red socks, 3 white socks, and 3 blue socks. without looking, you select a sock at random, replace it and seect a sond sock at random. what is the probablity that the first sock is blue and the second sock is red?

    asked on May 21, 2012
  51. PHY103

    Write 2 arguments in english, one in the form of modus ponens and one in form of modus tollens. Then write the arguments in symbols using sentence letters and truth functional connectives. What advantages does being able to symbolize our arguments provide?

    asked on April 12, 2012
  52. Chemistry

    How much CuSO4.5H20 would you need to prepare 6 grams of copper ammine complex, [Cu(NH3)]SO4.H20? There is only 1 ammonia molecule in the copper ammine complex. please answer asap, thanks!

    asked on March 27, 2012
  53. chemistry

    If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?

    asked on February 6, 2012
  54. chemistry

    If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?

    asked on February 6, 2012
  55. Anatomy and Physiology

    Discussion Topic: Chemistry of Life, Cells, and Tissues Select an organ and provide an example of how it uses the following: carbohydrates, lipids, proteins, and nucleic acids. Also, describe an area of interest related to one of the types of molecules,

    asked on January 14, 2012
  56. Anatomy and Physiology

    Discussion Topic: Chemistry of Life, Cells, and Tissues Select an organ and provide an example of how it uses the following: carbohydrates, lipids, proteins, and nucleic acids. Also, describe an area of interest related to one of the types of molecules,

    asked on January 14, 2012
  57. chemisty

    give the conjugate base for HNO2

    asked on November 29, 2011
  58. Psychology

    How do the ideas of positive psychology differ from the traditional model of illness?

    asked on October 18, 2011
  59. Geometry. Please help.

    1. The complement of an angle is 10 degrees less than the angle itself. Find the angle and it's complement. Find the perimeter and area of the following figures with the vertices given: a) A (3, 5) B (3, 1) C (0, 1) b) Q (-3, 2) R (1, 2) S (1, -4) T

    asked on September 14, 2011
  60. College Algebra

    A farmer has 100 yeards of fencing with which to enclose two adjacent rectangular pens both bordering a river. The farmer does not need to fence the side with the river. What should the dimensions of the two pens together (a rectangle) be in order to yield

    asked on July 15, 2011
  61. chemistry

    At room temperature, 20° C, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer best explains the states of the two fluids?

    asked on April 18, 2011
  62. Chemistry

    If you react 55g of hydrazine and 55g of oxygen gas, what is the maximum moles of nitrogen dioxide gas that can be made and what is the limiting reagent?

    asked on March 1, 2011
  63. Math

    What is 10x + 2y - 10 = 0 in slope intercept form ? and can you also explain how you got the answer cause I'm not really sure how to convert that into slope intercept (y = mx + b) m = slope and b = y intercept

    asked on February 23, 2011
  64. Math

    solve each system 1) 3x + y = 6 2x + 3y = 13 2) 2x + 5y - 6 = 0 -2x + y - 2 = 0 3) x + 3y = 6 4x - 5y = 7

    asked on February 22, 2011
  65. Math

    1. What are the next two terms of the following sequence? -3, 1, 5, 9... 2. What are the next two terms of the following sequence? -2, 4, -8, 16... 3. What is the common difference of the following arithmetic sequence? 13, -7, -27, -47... 4. What is the

    asked on January 15, 2011
  66. Global History

    Turning point of world war 2 and the causes of world war 2.

    asked on April 11, 2010
  67. Chemistry

    Hi can someone please help with this question, or atlest direct me in the right direction. Please and thank you. The initial rate of reaction H2O2(aq) --> H2O (l) + 1/2 O2(g) is found to be1.7*10^-3 M/s . Assume that this rate holds for 2 minutes. Start

    asked on November 20, 2008
  68. Math

    What is the greatest possible probability in any experiment? A. 9 10 910 B. 1 C. 10 D. 100

    asked on February 6, 2020
  69. Science-plz help

    which of the following show the correct order from smallest to largest a- community - organism - population-ecosystem b- organism -population- community -organism c- population-ecosystem- community-organism d- organism -community-ecosystem-population

    asked on January 30, 2020
  70. Math

    If the monitor is 15 inches wide, what is the height? Round the answer to nearest hundredth if necessary.

    asked on November 27, 2019
  71. social studies

    In which situation does an entrepreneur earn profits?

    asked on November 18, 2019
  72. Algebra

    Solve the inequality : 6/-5 < -18 i know it's false but it as some answers like 1. G < -23, 2. G > -90, 3. G >90, 4. G

    asked on December 10, 2018
  73. Math

    1. 7r - 7 = 2r + 18 1 .r= -5**** 2. r= 5 3. r= 2.2 4. r= 1.2 2. 2x + 12 = 18 - x 1. x= 3 2. x= 10 3. x= 6**** 4. x= 2 3. 8x - 3 = 15x + 18 1. x = -3 2. x= 3**** 3. x= 2.1 4. x= .9 4. 6y- 6 = 4y + 16 1. y = 2.2 2. y = -2.2 3. y= 11 4. y = 5**** Am i right?

    asked on December 5, 2018
  74. History

    so in the world history book for 8th grade it says that the roman republic had it's own constitution, which was a written set of guidelines we can say as laws. but it was not ratified, as in it was not approved of. I know to make something a constitution

    asked on December 5, 2018
  75. history

    Please check my answers! Characteristics women can vote United States representative democracy: United States government included separation of powers: United States government structured by a constitution: United States part of government like an

    asked on December 4, 2018
  76. Algebra

    Hey people, i need some help i tried to do this but i don't know what im doing help me out here please... 1.x/4 +1 = -5 a. -2**** b. 16 c. 4 d. -24 2. 6x + 29 = 5 a. -4** b. -18 c. 204 d. -144 3. combine like terms. -21a +16a 1. -5a**** 2. 5a 3. 37a 4.

    asked on December 4, 2018
  77. art

    1.what is one characteristic on this student work a. creation of 3-D art b. creation of cubist art c. exact representation of human proportion**** 2. to create a portfolio of work this artist would do all the following except? a .include more drawings of

    asked on December 3, 2018
  78. history

    someone plz help me Drag the geographical features that helped Rome flourish to the box. mountains plateaus plains rivers desert i think river mountains and plains am i right

    asked on December 3, 2018
  79. history

    URGENT QUESTION PLZ ANSWER ASAP How did common Greeks explain natural events prior to scientific explanations?

    asked on December 3, 2018
  80. history

    I'M confused can someone please explain this to me and help me figure out the answer? How did Greek scientists change the way people viewed and understood the natural world around them? How did common Greeks explain natural events prior to scientific

    asked on November 29, 2018
  81. history

    How did geography affect the development of independent city-states? Select all that apply. A. The mountains isolated the city-states. B. The sea separated the city-states. C. The coastal areas were not fertile. D. The plains were barriers. E. The climate

    asked on November 29, 2018
  82. history

    Which of the following describes life in Sparta for children? A. Young boys got a well-rounded education. B. Young boys were taught to obey orders. C. Girls stayed in the home with their moms. D. Boys were expected to participate in government. is it b plz

    asked on November 29, 2018
  83. math

    can someone help me like ASAP 1. 13x - 7 = 136 A. 11 B. 15******* C. 8 D. 9 Am I correct?

    asked on November 29, 2018
  84. science

    Breanna and Kevin learned that fossil fuels, such as coal and oil, release energy when they are burned. Breanna believes this energy comes from the ancient plants and animals that formed fossil fuels, but Kevin says the power in fossil fuels comes from the

    asked on June 3, 2018
  85. Math

    Whole numbers from 1-10 that are factors of… 1260 Whole numbers from 1-10 that are factors of... 73500 Whole numbers from 1-10 that are factors of... 3600 Can I have help ASAP with these three problems? Thank you in advance! :)

    asked on December 13, 2017
  86. Math

    Write the number in two other forms two hundred thirty four thousand one hundred sixty four

    asked on October 17, 2017
  87. Math

    Managers of a local shopping mall selected a random sample of shoppers and recorded the gender of each. Here are their results. Gender Number of People Male 69 Female 106 Based on this sample, how many of the next 2000 shoppers would we predict to be

    asked on August 20, 2017
  88. Statistics

    What is the probability that simple random sample of 50 staff members provides a sample mean leave of 6.5 to 9.5 weeks?

    asked on August 1, 2017
  89. Math

    If the diameter of a circle P is 40 percent of the diameter of circle Q, then the area of circle P is what percentage of the area of circle Q? Not enought information given right?

    asked on July 18, 2017
  90. math

    If 3/x= 6, then x-1= I tried to solve for x and got 2, but 3/2 does not equal 6??

    asked on July 18, 2017
  91. Literature

    Since the time of the play's first performance, the props and set have been designed to be minimal so that________. the play can be performed in outdoor as well as indoor locations the play becomes more appealing for younger audiences ***my answer actors

    asked on May 5, 2017
  92. Plz help check my answer!!?

    The commute times during rush hour traffic on a local interstate have a mean of 25 minutes and a standard deviation of 5 minutes. Repeated studies of this section of interstate are considered normally distributed. What percent of commuters drive between 20

    asked on April 24, 2017
  93. Check my math question please? Very urgent!

    The commute times during rush hour traffic on a local interstate have a mean of 25 minutes and a standard deviation of 5 minutes. Repeated studies of this section of interstate are considered normally distributed. What percent of commuters drive between 20

    asked on April 24, 2017
  94. Math-decimals

    Is 20 times 5/6 greater or less than 20?

    asked on February 16, 2017
  95. Science

    Why do Oil & Water not mix? I'm so confused (This is just something I wanna know, no multiple choice) also, Ms. Sue, If you see this, Hi

    asked on January 30, 2017
  96. Math

    A waitress Nikia makes three dollars per hour +8 dollars in tips she goes to earn no less than $26 today what is the algebra equation for that

    asked on December 20, 2016
  97. Chemistry

    Determine the volume of a 0.1 M solution of HCl, necessary to titrate 20 mL of a 0.5 M solution of NH3. The value of Kb is 1.8 x 10-5.

    asked on December 13, 2016
  98. Chemistry

    Determine the variation of the buffer of the problem 1, if 200 mL of the buffer is added 10 mL of a 1.0 M solution of HCl.

    asked on December 13, 2016
  99. Chemistry

    Calculate the pH of a buffer made of a 0.4 M of acetic acid and 0.5M of sodium acetate. The Ka for the acetic acid is 1.8 x 10-5.

    asked on December 13, 2016
  100. math

    2x^2 - 5 y = _______ 3x^2 - 4

    asked on October 28, 2016


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