# Posts by joanne

Total # Posts: 189

**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.

**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?

**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.

**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

**biology help**

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**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?

**Math**

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

**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.

**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 the total cost of the T...

**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) number of paver stones...

**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?

**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 of 4.0. The pooled (i...

**english**

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

**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 is randomly selected...

**Thermodynamics**

The active element of a certain laser is made of a glass rod 30cm long by 1.5cm in diameter. If the temperature of the rod increases by 65¡ãC, what is the increase in: a) Its length? b) Its diameter? and c) Its volume? Assume the average coefficient of linear ...

**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?

**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 degrees to the ...

**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?

**math**

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

**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?

**Social Studies**

yep sorry it is b

**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

**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

**english**

what is the correct spelling with troublesome consonants,sheriff

**EARTH SCIENCE**

how fast are a hurricanes winds?

**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 down, it continues a ...

**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 liabilities and ...

**biology**

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

**chemistry**

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

**science help!!!**

Hi, does anyone know the answers to the quiz after this, i am failing and need the help, please!

**Cesar chavez**

3x567 4

**earth**

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

**math**

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

**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?

**Math: solving rational equation**

2/x + 5/3 = 7/x

**Math help pls**

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

**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 determined by the ...

**chemistry**

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

**chemistry**

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

**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 (%) = (average deviation from ...

**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 (%) = (average deviation from ...

**chemistry**

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

**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) CH3O...

**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.

**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 education. (Nationwide ...

**Ireland**

it's an opinion. I agree

**Italy**

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

**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?

**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

**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

**fractions**

1/9 3/7 2/3

**trigonometry**

wow this really helps!! :D I have the same problem too haha thanks!!!

**math**

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

**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 Poisson stati...

**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 Poisson ...

**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 look at words to learn ...

**biology**

How would you measure chloride current during an action potential

**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)

**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 seven presidents (...

**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 involving economic theory...

**Economics**

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

**History-Civil War**

Thank You, I must comment to all at Jiskha, all the time you put in, in answering all those questions. You are all special and dedicated people in doing this.

**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 ...

**History-Civil War**

Thank you so much Damon, I had found railroads, rifles & telegraph.Your info helps me with outlining my answer.

**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

**History-Civil War**

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

**History-Civil War**

Thank You Damon !

**History-Civil War**

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

**History-Civil War**

Thank You, I'm on the right track.

**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 ?

**history-Civil War**

Thanks Damon!

**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 army in order to ...

**History-Civil War**

I already was on that site you gave me...no..I'm looking tooo hard, it could be right under my nose and I don't even know it. I look up for HRS. I have a hard time absorbing this subject..I always did. Thank You for your time anyway.

**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 ammunition...also ...

**History-Civil War**

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

**History-Civil War**

O.K. ...my answer was correct, but at this time, 1863, this Battle was also a Union victory ?

**History-Civil War**

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

**History-Civil War**

Thanks for your opinion Damon...I had Ambrose Burnside 2nd on my list

**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 ???????

**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 won...Have been working on ...

**History-Civil War**

Damon..you explain it well !:) This is one subject I always had a hard time absorbing...doing my best..your help is again appreciated in helping me to continue on this subject...Thanks again!

**History-Civil War**

Thank You anyway for your help !

**History-Civil War**

Yes....last 4 hrs. trying to do this...

**History-Civil War**

Still struggling on info about Vicksburg...

**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 & how did they...

**social studies**

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

**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 ?

**social studies**

Thanks Lance, for the guidance to complete my work on this.

**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 more or less likely...

**social studies**

Oh Boy ! This is really confusing me now ! Was trying to read up on this..many many sites..will continue to do so, including your listed site...Thank you so much to you and Raymond on this one ! Don't know if I could really understand this to write up on it...dont want to ...

**social studies**

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

**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 ?

**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 ?

**social studies**

Already was on your suggested sites...don't think you can help me on this one...Thank you for trying

**social studies**

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

**social studies**

was already on your suggested 2nd site and found what i need ...Thank you...I need real help with my last question..ill send now

**social studies**

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

**social studies**

Yes Ms. Sue, this is what I've been looking for, I'm on the right track...just wanted to make sure so I'm not writing about the wrong thing here.Thank You !

**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