Popular questions and responses by Joanne
  1. Math

    Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. WHich two masses produce this answer? 1) 210.10 g+235.100g 2)210.100 g + 235.10 g 3) 210.1 g + 235.1 g 4) 210.10 g+ 235.10 g I think the answer is 2 but I don't

    asked on November 6, 2008
  2. Chem.

    An aspirin tablet weighing 0.400 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of

    asked on April 18, 2009
  3. Language Arts

    The seashells were iridescent in the sunlight. a. cloudy b. drying out c. breaking into pieces d. shimmering with colors I choose "d" Am I right?

    asked on September 5, 2017
  4. algebra

    The volleyball team at West View High School is comparing T-shirt companies where they can purchase their practice shirts. The two companies, Shirt Box and Just Tees, are represented by this system of equations where x is the number of T-shirts and y is

    asked on May 23, 2016
  5. earth

    The radius of the sun is 695 500 km What is its approximate volume written in Scientific notation?

    asked on July 23, 2013
  6. english

    Learning is to sail challenging and exhilarating it is also not the easiest thing to do. is this sentence a dangler sentence.

    asked on February 22, 2015
  7. Chemistry

    Balance the equation in aqueous basic solution: As2S3(s) + H2O2(aq) → AsO43-(aq) + SO42-(aq) I normally understand how to balance redox equations, but this one confuses me because I would normally think that the As2S3 is being reduced to AsO4^3-, but

    asked on June 5, 2011
  8. Microeconomics

    Mrs.Simpson buys loaves of bread and quarts of milk each week at prices of $1 and 80 cents, respectively. At present she is buying these products in amounts such that the marginal utilites from the last units purchased of the two products are 80 and 70

    asked on March 23, 2011
  9. English

    Anne Bradstreet's "The Author to Her Book" I have to explain the irony in the poem. I thought irony would be like a firehouse burning to the ground. I don't see any irony in the poem what am I missing?

    asked on July 23, 2008
  10. Statistics

    In a study of pleas and prison sentences, it is found that 40% of the subjects studied were sent to prison. Among those sent to prison, 20% chose to plead guilty. Among those not sent to prison, 10% chose to plead guilty. 3.3.a (0.5 pt) If a study subject

    asked on February 6, 2015
  11. Mathematics

    The graph of y = f(x) is transformed to give the graph of y= -f(x+3). The point A on the graph of y=f(x) is mapped to the point P on the graph of y= -f(x+3). The co-ordinates of point A are (9,1). Find the co-ordinates of point P. Thank you very much

    asked on January 3, 2017
  12. math

    What are three different ratios for 5 circles and 4 squares?

    asked on April 28, 2010
  13. Math

    What are two pairs of numbers of 105 as their least common factor ?

    asked on August 31, 2016
  14. statistic

    Two samples each of size 25 are taken from independent populations assumed to be normally distributed with equal variances. The first sample has a mean of 35.5 and standard deviation of 3.0 while the second sample has a mean of 33.0 and standard deviation

    asked on March 17, 2015
  15. chem

    The pressure 15.0 meters under water is 248 kPa. what is this pressure in bar? (how would you set this up) what is the pressure in torr? I believe the second one is set up like this: 248 kpa * (760 torr/ 101.325 kpa)= 1860.15.. Although, if the lowest sig

    asked on June 21, 2018
  16. Chemistry

    If the density of ocean water at depth of 10,000m is 1.071g/ml and if 25.0g of water at that depth contains 190mg of KCl what is the molarity of KCL?

    asked on October 12, 2014
  17. Chemistry

    If a reaction yields 2.5165 × 10^8 kJ, then how much mass was lost? (User 3.00 x 108 m/s as the speed of light) 2.30 × 10^-3 kg 5.60 × 10^-3 kg 2.80 × 10^-12 kg 5.60 × 10^-12 kg Please help.

    asked on May 16, 2012
  18. History-Civil War

    What was the biggest challenge faced by the federal government at the end of the war in reintergrating the South into the United States of America ?

    asked on July 1, 2011

    IS A PLANT CELL AN EXAMPLE OF A UNICELLULAR ORGANISM? iS AN ANT AN EXAMPLE OF MULTICELLULAR ORGANISM? What are Plants Plants are multicellular photosynthetic organisms that are believed to have evolved from green algae. Both groups have chlorophylls a and

    asked on February 20, 2007
  20. Physics

    Really need help with this asap plz~ there is a 4kg wooden block on top of a wooden ramp forming an angle of 37 degrees above surface.The block is placed 1.2 m up on the ramp and the ramp is connected to another wooden flat board.So when the block slides

    asked on December 8, 2013
  21. statistics

    1. Find the mean, median, and range for each of the two data sets? 2. Find the standard deviation using the rule of thumb for each of the data sets. 3. Compare the two sets and describe what you discover. The following data sets shows the ages of the first

    asked on August 13, 2011
  22. social studies

    How did the Emancipation Proclamation change the nature of the Civil War, if it did at when he issued it ?

    asked on June 9, 2011
  23. Maths

    The volume of a hemisphere is 250 ----- pi 3 Work out the total surface area of the solid hemisphere. Give your answer as a multiple of pi. Thank you.

    asked on January 3, 2017
  24. physics

    a projectile is fired at 50 meters per second at an angle of 30 degrees below the horizontal off a cliff that is 50 meters high. How far away and at what speed and angle will this projectile land?

    asked on November 2, 2014
  25. Algebra

    mark can paint the fence in 40 minutes and manny can paint the fence in 30 minutes together how long will it take to paint the fence

    asked on September 7, 2014
  26. chemistry

    the oxidation number of Mn in MnO4- is +4 (true or false)

    asked on December 10, 2012
  27. chemistry

    #1 A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml (a) find the mean volume and deviation from the mean for each and calculate the average deviation from the mean (b) calculate the relative deviation (in %) for this set of data. Relative deviation (%) =

    asked on December 10, 2012
  28. Physics

    When a mass of 21 g is attached to a certain spring, it makes 16 complete vibrations in 4.4 s. What is the spring constant of the spring? Answer in units of N/m

    asked on February 16, 2012
  29. reading

    I have a foster child (my niece) who has been through a lot in the past year. She is having huge difficulty in school. She is in 1st grade. My 21 year old daughter is home with her trying her best to help her but it is getting overwhelming to get her to

    asked on October 7, 2011
  30. Economics

    What is the role of economic theory in the way economies are run today? Give some concrete examples.

    asked on July 27, 2011
  31. History-Civil War

    To - Damon....any comments on the question I posted on 07-10-11 @ 9:48 pm. I always appreciate your remarks...they help

    asked on July 11, 2011
  32. history-Civil War

    Sorry Sra...your sites didn't help..i was in sooo many sites last two discussion found on this don't know the answer to this ?

    asked on June 11, 2011
  33. elementary statistics

    The distribution of cholesterol levels in teenage boys is approximately normal with u=170 and o=30. Levels above 200 warrent attention. Find the probability that boy has a cholesterol level greater than 225.

    asked on May 29, 2011
  34. chemistry

    calculate the velocities of electrons with de Broglie wavelengths of 1.0x10^2nm and 1.0nm

    asked on September 23, 2010
  35. math

    What is the number directly below 99 when the triangular array below is continued? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

    asked on March 7, 2010
  36. word problems

    Paul read 20 pages of a book in 15 minutes. (a) What is Paul’s reading rate of pages per minute? (b) If he continues to read at the same rate, how many pages will he read in 1 hour?

    asked on November 14, 2009
  37. college

    how can i solve this problem? The number of tickets sold each day for a upcoming peformance of Handel's Messiah is given by N(x)=0.4x^2+8x+11, where x us the number of days since the concert was first announced. When will daily ticket sales peak and how

    asked on September 20, 2009
  38. Math

    Find the five-number summary of the following set of numbers. 337, 248, 157, 388, 248, 451, 271, 225, 310 First sort... 157,225,248,271,310,337,388,451. the minimum = 157 the minimum = =271 the median = (271+310)/2= 290.5 the upper quartile= can you please

    asked on December 1, 2008
  39. United States History

    What were the views of the NORTHERN RADICALS concerning the following topics: -slavery -women's suffrage -prohibition (temperance) -free public education, help for handicapped -right to education for women & african americans -practice of religion -Native

    asked on November 30, 2008
  40. math

    Business and finance. Julio works as a quality control expert in a beverage factory. The assembly line that he monitors produces about 20,000 bottles in a 24-hour period. Julio samples about 120 bottles an hour and rejects the line he finds more than 1/50

    asked on October 23, 2008
  41. Psychology

    Which parts of the brain begin to change first during development? What function would be affected due to these changes? What region of the brain changes last?

    asked on September 28, 2008
  42. statistics

    SAT scores are normally distributed. The SAT in English has a mean score of 500 and a standard deviation of 100. a. Find the probability that a randomly selected student's score on the English part of the SAT is between 400 and 675. b. What is the minimum

    asked on August 4, 2008
  43. algebra I

    If you toss a coin, the probability of gettig heads is 1/2. If you toss a coin 2 times. the probability of getting heds each time is 1/2*1/2 or (1/2)^2. -Write an expression to represent the probability of tossing a coin 'n' times and getting 'n' heads.

    asked on February 7, 2008
  44. Math

    A football coach wants to know if the is a correlation between his players' leg strength and the time it takes for them to sprint 40 yards. he sets up the following test and records the data: Every day for a week, he counts how many times each player can

    asked on November 14, 2019
  45. Algebra

    Solve (8X5)+(8X1)-(2x6)+6-2x(2-1)

    asked on January 31, 2018
  46. Math

    a book cover has the length and width (in inches). top 31-b, bottom 2+a+2b,sides 3a - b and 2+a+2b,find the values of a and b? Find the perimeter of the book cover.

    asked on April 10, 2017
  47. Algebra

    A snack stand sells hot dogs for $2 and hamburgers for $3. If you want to spend exactly $14, write an equation to model this situation. If you purchase one hot dog , how many hamburgers will you purchase?

    asked on January 30, 2017
  48. Pre-Calulus

    for a person who drives his car 15000 miles a year trading in a car that gets 15 miles per gallon for a car that gets 18 miles per gallon (a 20% increase) will save them how many gallons of gas each year?

    asked on August 31, 2016
  49. Math

    Three seta of lights blink after 6 seconds, 8 seconds and 12 seconds respectively. What is the least number of seconds it would take for the lights to blink together.

    asked on June 20, 2016
  50. Math

    Tim has a rose garden that is three times as long as it's wide. the total length around the garden is 80 feet. tim wants to line the exterior of the garden with paver stones. each paver stone is 2 feet by 2 feet in area. 1) area of the rose garden 2)

    asked on September 17, 2015
  51. Thermodynamics

    Gas is contained in a n 8L vessel at a temperature of 20¡ãC and a pressure of 9atm. a)Determine the number of moles of gas in the vessel. b) How many molecules are there in the vessel?

    asked on August 27, 2015
  52. Organic Chem

    4 KO2 + 2CO2 rightwards arrow 2 K2CO3 + 3 O2 How many moles of O2 can be produced from 12 moles of KO2 and 10 moles of CO2? If you were to produce 100.0 grams of O2 what would be the percent yield of the reaction?

    asked on November 14, 2014
  53. Physics

    a place kicker must kick a football from a Lint 36 meters from the goal. As a result of the kick, the ball must clear the crossbar, which is 3.04 meters high. When kicked, the ball leaves the ground with a speed of 20 meters per second at an angle of 50

    asked on November 2, 2014
  54. math

    18 sections of fence each 1 meter long. What are the various sizes of rectangular pens using all 18 units of fence?

    asked on October 23, 2014
  55. Statistics

    Suppose you are given data from a survey showing the IQ of each person interviewed and the IQ of his or her mother. That is all the information you have. Your boss has asked you to put together a report

    asked on May 14, 2014
  56. english

    what is the correct spelling with troublesome consonants,sheriff

    asked on April 30, 2014
  57. Finance

    Following are selected financial data in thousands of dollars for the Hunter Corporation. 2012 2011 Current assets $ 500 $400 Fixed assets, net 700 600 Total assets 1,200 1,000 Current liabilities 300 200 Long-term debt 200 200 Common equity 700 600 Total

    asked on November 10, 2013
  58. biology

    Why is it good for plants on the forest floor to have larger leaves but could be harmful to the trees above?

    asked on November 5, 2013
  59. chemistry

    balance the following ionic equation: Sn(2+)(aq)+ Mn(2+)(aq)----- Mn(5+)(aq)+ Sn (s)

    asked on October 21, 2013
  60. math

    Louise travels 10 miles in 15 minutes and alice drives 23 miles in 30 minutes. who is faster?

    asked on January 27, 2013
  61. math

    Ms Adams gave 1/4 of an apples to each of 10 children. How many apples did she give to the children in all?

    asked on January 23, 2013
  62. Math: solving rational equation

    2/x + 5/3 = 7/x

    asked on January 14, 2013
  63. Math help pls

    X^-2 - Y^-2 __________ X^-1 + Y-1

    asked on January 13, 2013
  64. Strayer university

    Suppose that the Fed's inflation target is 2%, potential output growth is 3.5%, and velocity is a function of how much the interest rate differs from 5%: %^V= 0.5 X (i-5). Suppose that a model of the economy suggests that the real interest rate is

    asked on December 16, 2012
  65. chemistry

    a 2.55g sample of an unknown has a volume of 3.73 cm. what is the density of the unknown

    asked on December 10, 2012
  66. chemistry

    #1 A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml (a) find the mean volume and deviation from the mean for each and calculate the average deviation from the mean (b) calculate the relative deviation (in %) for this set of data. Relative deviation (%) =

    asked on December 10, 2012
  67. chemistry

    a 2.55g sample of an unknown has a volume of 3.73 cm. what is the density of the unknown

    asked on December 10, 2012
  68. chemical reaction engineering

    Propane steam reforming over an alumina supported Ni metal catalyst: C3H8 (g) + H2O (g) → CO2 (g) + H2 (g) is proposed to follow these mechanisms: C3H8 + 2S1 ↔ C2H5-S1 + CH3-S1 (M1) H2O + 2S2 ↔ OH-S2 + H-S2 (M2) CH3-S1 + OH-S2 → CH3O-S1 + H-S2 (M3)

    asked on November 6, 2012
  69. economics

    Over the last 30 years in the United States, the realprice of a college education (i.e., after adjusting for inflation) has increased by almost 70 percent. Over the same period, an increasing number of high school grad- uates have sought a college

    asked on April 20, 2012
  70. Italy

    What is the officail website for Italy and it's sports?

    asked on March 25, 2012
  71. Physics

    A load of 47 N attached to a spring that is hanging vertically stretches the spring 0.22 m. What is the spring constant?

    asked on February 16, 2012
  72. physics

    A harmonic wave is traveling along a rope. The oscillator that generates the wave com- pletes 48.0 vibrations in 25.8 s. A given crest of the wave travels 413 cm along the rope in a time period of 10.5 s. What is the wavelength? Answer in units of m

    asked on February 16, 2012
  73. math

    what is the value of 3/14 rounded to the nearest fouth.

    asked on January 30, 2012
  74. college biology

    In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey

    asked on October 12, 2011
  75. College biology

    In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey

    asked on October 8, 2011
  76. biology

    How would you measure chloride current during an action potential

    asked on September 18, 2011
  77. math\

    2. A data set consists of a set of numerical values. Which, if any, of the following statements could be correct? a. There is no mode. (True or False) b. There are two modes. (True or False) c. There are three modes. (True or False)

    asked on August 13, 2011
  78. Economics

    Unable to find any info to answer my question I recently posted about.. role of economic theory in the way economics are run today & no clue found as to concrete examples of same...went through all your sites you suggested and looked many, many sites

    asked on July 27, 2011
  79. History-Civil War

    To Damon, if available, this is my last question in this subject..for me very confusing..don't know where to start or what I'm looking for. Do you see an overall vision, or approach to command and strategy, in Ulysses S. Grant's actions as overall military

    asked on July 12, 2011
  80. History-Civil War

    What was the most important technological or technical advance made during and for the Civil War ?

    asked on July 10, 2011
  81. History-Civil War

    How important was the Union blockade to defeating the Confederacy, and how could the Union have won without it ?

    asked on July 2, 2011
  82. history-Civil War

    Upon retreating from Petersburg, were there any options open to Lee that might have prolonged the War? Please chech if my answer is correct... No, Lee retreated from Petersburg and attempted to link up with the remnants of Confed. Gen. Johnson's defeated

    asked on June 30, 2011
  83. History-Civil War

    1865: Marching through Georgia In terms of supply, how was Sherman"s march different than other Civil War campaigns? What I found was..Sherman telegraphed President Lincoln, asking him as a gift to Savannah, he would need 150 guns along with plenty of

    asked on June 28, 2011
  84. History-Civil War

    1865-Marching through Georgia How did Sherman's march affect the Confederacy, and advance the cause of Union victory ?

    asked on June 27, 2011
  85. History-Civil War

    Battle of Chattanooga, last fought by Grant and Sherman together. Why was its outcome significant ?

    asked on June 21, 2011
  86. History-Civil War

    Of the Union Generals covered in the course through 1863, who was considered the worst? The.. site you gave me in the past was of no help at all...was mostly timelines..I came up with George B. McClellan ???????

    asked on June 19, 2011
  87. History-Civil War

    To:Damon..His little bit of written info really helps me to complete my essays....New question...Was there an opportunity for the confederates to win during any day of Gettysburg? Identify & analyze the opportunity, and show how the South could have

    asked on June 18, 2011
  88. History-Civil War

    Thank You anyway for your help !

    asked on June 18, 2011
  89. History-Civil War

    Still struggling on info about Vicksburg...

    asked on June 18, 2011
  90. social studies

    What was the greatest obstacle that the Union army faced at Vicksburg, and how did they overcome it? I read so much on this ...were hills, surrounded by flooded marshlands & couldn't get through by foot..can't find a full explanation of this &

    asked on June 18, 2011
  91. social studies

    When was there a time through 1863 that the Confederates had a strong chance of winning the Civil War..?

    asked on June 16, 2011
  92. social studies

    Almost done ..What are two of the qualities that made Stonewall Jackson an outstanding battlefield Commander ? The only thing I found on this was, he inspired incredible loyality in his men and was a brillant stratigist ?? Is this correct ?

    asked on June 15, 2011
  93. social studies

    Here I'm really upset with all this....New question..I need something to guide me...How did the changing command situation of the Army of the Potomac influence Gettysburg ? Also, did the elevation of George Gordon Meade make the Union victory

    asked on June 14, 2011
  94. social studies

    Was there an opportunity for the confederates to win during any day of Gettysburgh ? How could the South have won ??

    asked on June 14, 2011
  95. social studies

    Battle of Chanellorsville 1863....of all the battles fought by Robert E. Lee through 1863, this battle was his most impressive I correct ?

    asked on June 14, 2011
  96. social studies

    Please correct me if I'm wrong....Of the Union generals covered in the course through 1863, who do you consider the worst ? I say ...Gen. George B. McClellan ?

    asked on June 13, 2011
  97. social studies

    the most significant thing to learn about the differences between social, political and economics systems in the world ???????

    asked on June 12, 2011
  98. social studies

    Describe how influential you would say the cold war has been on the world of today ?

    asked on June 12, 2011
  99. social studies

    What political dangers did President Lincoln face when he issued the Emancipation Proclamation..I don't think Damon was able to help me or I'm looking at the question the wrong way ?Need your input on this Ms.Sue....Thank You

    asked on June 11, 2011
  100. History-Civil War

    What political dangers did President Lincoln face when he issued the Emancipation Proclamation ?

    asked on June 11, 2011


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