Joanne

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

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

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?

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

5. earth

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

6. english

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

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

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

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?

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

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

12. math

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

13. Math

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

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

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

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?

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.

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 ?

19. BIOLOGY

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

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

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

22. social studies

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

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.

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?

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

26. chemistry

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

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 (%) =

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

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

30. Economics

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

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

32. history-Civil War

Sorry Sra...your sites didn't help..i was in sooo many sites last two days...no discussion found on this question..you don't know the answer to this ?

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.

34. chemistry

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

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

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?

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

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

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

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

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?

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

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.

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

45. Algebra

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

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.

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?

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?

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.

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)

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?

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?

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

54. math

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

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

56. english

what is the correct spelling with troublesome consonants,sheriff

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

58. biology

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

59. chemistry

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

60. math

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

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?

62. Math: solving rational equation

2/x + 5/3 = 7/x

63. Math help pls

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

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

65. chemistry

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

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 (%) =

67. chemistry

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

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)

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

70. Italy

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

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?

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

73. math

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

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

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

76. biology

How would you measure chloride current during an action potential

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)

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

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

80. History-Civil War

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

81. History-Civil War

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

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

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

84. History-Civil War

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

85. History-Civil War

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

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 ???????

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

88. History-Civil War

Thank You anyway for your help !

89. History-Civil War

Still struggling on info about Vicksburg...

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 & waters..army couldn't get through by foot..can't find a full explanation of this &

91. social studies

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

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 ?

93. social studies

Here goes..now 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

94. social studies

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

95. social studies

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

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 ?

97. social studies

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

98. social studies

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

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