Tuesday

July 28, 2015

July 28, 2015

Total # Posts: 248

**Alegbra**

I am trying to factor, but I can't seem to get this one. The question is: -15d*2*-2d+8. It is actually -15d squared but I didn't know how to right that without it being confusing. Anyways I changed it so now it says -1(15d-2d+8). Then I drew a diagram using the factors...
*April 24, 2012*

**Chemistry**

What will be the effect on a chromatogram of two well separated peaks if: (this is for a gas chromatography) a) the carrier gas flow is set too high? b) the temperature of the injection port is set too low? c) the temperature of the column is set too high?
*April 3, 2012*

**Chemistry**

If the gas chromatograph is polar, and a mixture of a polar compound and a non-polar compound is injected. Which one of the two compounds will have a higher retention time? Why?
*April 3, 2012*

**chemistry**

What will be the effect on a chromatogram of two well separated peaks if: (this is for a gas chromatography) a) the carrier gas flow is set too high? b) the temperature of the injection port is set too low? c) the temperature of the column is set too high?
*April 3, 2012*

**Geography **

Can someone check these for me? 1.What problem has been at the heart of the intense political struggles in Central America? Unequal distribution of usable land is the heart of the political struggle. There is a shortage of farmland in order to meet the needs of everyone. ...
*March 23, 2012*

**Chemistry **

What is the balanced equation for the reaction of acetylsalicylic acid and sodium hydroxide?
*March 20, 2012*

**Algebra 1**

Write an equation of a line that passes through (-12, -14) with slope 6. A.y = 6x - 12 B.(y + 14) = 6(x + 12) C.(y + 12) = 14(x + 6) I've tried so many different ways to find this answer but can't. Please help me and please show me how you got it. I don't want you ...
*March 13, 2012*

**English 1 **

1.Writers often communicate their themes by building clues into the story. Choose one story from Collection 4 and show how the author uses characterization, title choice, and key passages to develop the theme of the story. Use examples from the story, including quotes from the...
*March 12, 2012*

**English 1 Literature**

I understand what the question is asking for but I do not know exactly how to write it. Here is the question. The way a story is told and the voice that tells it are important parts of a story. Choose at least two stories from Collection 3. Analyze the role that the narrator ...
*March 12, 2012*

**Chemistry**

It is possible, although less accurate, to do a standard addition with only one sample. An unknown Fe sample was analyzed by AAS and gave an absorbance reading of 0.160. To the same sample we added 1.5ppm Fe and the new absorbance reading was 0.205. Calculate the ppm of the ...
*March 5, 2012*

**chemistry**

One purpose of adding KIO4 is to prevent the permanganate ion from being slowly reduced to Mn+2 by H2O. Write a balanced redox equation for the reduction of permanganate ion to Mn+2 by water in acid solution.
*February 23, 2012*

**Chemistry**

There is a large [Cr2O7]-2 absorbance observed at 360 nm. Why can this wavelength not be used instead of the smaller absorbance at 440 nm?
*February 23, 2012*

**ChemistryDrBob222 could you please check this over**

0.281g of Fe(NH4)2(SO4)2*6H2O is dissolved in a total volume of 500.0 mL of water, calculate the resulting Fe concentration in ppm. molar mass of Fe(NH4)2(SO4)2*6H2O = 392.14088g/mol molar mass of Fe = 55.845g/mol 0.281g * (1mol/392.14088g) = 7.165X10^-4 mol 7.165X10^-4 mol...
*February 13, 2012*

**Algebra**

Krystal grilled 21 burgers at a block party. She grilled the same number of pounds of turkey burgers as hamburgers. Each turkey burger weighed 1/4 pounds and each hamburger weighed 1/3 pound. How many of each did Krystal grill? ~Please help me and provide an explanation for ...
*January 19, 2012*

**HELP PLEASE! (Math)**

Krystal grilled 21 burgers at a block party. She grilled the same number of pounds of turkey burgers as hamburgers. Each turkey burger weighed 1/4 punds and each hamburger weighed 1/3 pound. How many of each did Krystal grill? ~Please help me and provide an explanation for ...
*January 19, 2012*

**I NEED HELP :(**

Okay thank you! I understand now!
*January 18, 2012*

**I NEED HELP :(**

Mr. Malone is putting money in two savings accounts. Account A started with $200 and Account B started with $300. Mr. Malone deposits $15 in Account A and $10 in Account B each month. In how many months will the accounts have the same balance? What will that balance be?
*January 18, 2012*

**Algebra**

Mr. Malone is putting money in two savings accounts. Account A started with $200 and Account B started with $300. Mr. Malone deposits $15 in Account A and $10 in Account B each moth. In how many months will the accounts have the same balance? What will that balance be?
*January 18, 2012*

**Math**

Mr. Malone is putting money in two savings accounts. Account A started with $200 and Account B started with $300. Mr. Malone deposits $15 in Account A and $10 in Account B each moth. In how many months will the accounts have the same balance? What will that balance be?
*January 18, 2012*

**Math Homework**

A car dealer carries out the following calculations. What is the annual percentage rate? (Round your answer to the nearest tenth.) List price $ 5,368.00 Options $ 1,625.00 Destination charges $ 200.00 Subtotal $ 7,193.00 Tax $ 431.58 Less trade-in $ 2,932.00 Amount to be ...
*October 30, 2011*

**algebra**

Assume f(x) = x2 + 2. Find the functional value requested.
*October 22, 2011*

**chemistry**

what mass of water can be heated from 45 celcius to 88 celcius with 28kj?
*October 11, 2011*

**chemistry**

what mass of water can be heated from 45 celcius to 88 celcius with 28kj?
*October 11, 2011*

**geometry**

10. Exactly how many cubic inches of air can a fully inflated basketball hold if its radius is 4.8 inches
*October 9, 2011*

**math**

540 kg of dry concrete mixture is to be spread over three surfaces in the ratio equal to that of their areas.If their areas are 9 square m,11 square m and 16 square m,how much is used on each surface?
*October 2, 2011*

**math**

lim (2x^2+3x-2)/ (2x-1) the lim is x->1/2 [ans:5/2 but i get 3/2) can someone show me the calculation work.
*July 20, 2011*

**math**

lim (7-6x^5)/(x+3).... the lim is x->+infinity [ans=-infinity but i get 0] can someone show me the calculation work.
*July 20, 2011*

**math**

f'(x).... y=(e^x-e^-x)/(e^x+e^-x). I need the calculation work. [ans: 4/(e^x+e^-x)^2]
*July 20, 2011*

**chem**

a mixture of 50g of S & 1x10^2g of Cl2 reacts completely to form S2Cl2 &SCl2. Find the mass of S2Cl2 formed.
*July 20, 2011*

**Physics**

7.685
*June 30, 2011*

**Chemistry**

An electron ps from the 6th to te 3rd energy level in the hydrogen atom: a) calculate the wavelength b) calculate the frequency c) calculate te enrgy d) into which spectral series would the photon be grouped? (i really just need to formulas, then i could solve myself...)
*May 23, 2011*

**Managerial Accounting**

true
*May 13, 2011*

**URGENT - History**

I tried that!
*May 11, 2011*

**URGENT - History**

Hi, Okay, so where can I get other cartoons on Stalin? I was searching like forever to find that one. Thanks for all your help
*May 11, 2011*

**URGENT - history**

Based on what you know do you think I should reference it as from Getty Images, or should I ditch it and try to find another one?
*May 10, 2011*

**URGENT - history**

Heya The Cartoon on Getty Images, Cosy Communist circa 1940. I'm trying to find where it was originally published and who originally drew it so that I can put that in my research journal. We are graded on our research journal and it documents like all our research. I need ...
*May 10, 2011*

**math**

what are the factors of 22x^2+66x-220?
*May 1, 2011*

**algebra**

Stacey throws two dice. The difference in face value between the two dice is three, and the product of the numbers thrown is equal to twice the sum of the two numbers. Show and solve an alebraic equation that finds the numbers Stacey threw.
*April 27, 2011*

**US History**

The cold war/red scare.
*April 24, 2011*

**Maths**

Hey! Okay so when the weather reporters say that ?mm of rain fell over night, they're talking about mm cubed aren't they? So while I was working out what to cube root to find out the ?mm of rain that fell overnight, I called it Rainfall mm. So what could I call the ?mm...
*April 24, 2011*

**maths**

how do you do taking away fractions like for eg 2 1/5 take away 1/10
*March 31, 2011*

**chemistry**

a liquid has an enthalpy of vaporization of 30.8 kg.mol. at 273 K it has a vapor pressure of 102 mmHg. What is the normal boiling point of this liquid
*February 17, 2011*

**chemistry**

a liquid has an enthalpy of vaporization of 30.8 kg.mol. at 273 K it has a vapor pressure of 102 mmHg. What is the normal boiling point of this liquid
*February 17, 2011*

**Modern World Studies**

i thought 1 was Romanticism?
*February 10, 2011*

**algebra**

write a quadratic equation in the variable x having given the numbers as sollutions type the equation in standard form ax^2+bx+c=0. solution 4 only solution
*February 8, 2011*

**Math**

Actually, Maybe I've got it. Is it 100(700)+20000=90,000 It will cost $90,000 to make 700 items.
*February 1, 2011*

**Math**

The Mathematical model C(x)=100x+20,000 represents the cost in dollars a company has in manufacturing x item during a month. Base on this, how much it does it cost to produce 700 item? Sorry, I did not put the whole question up
*February 1, 2011*

**Math**

How do I solve this? I don't even know where to begin.
*February 1, 2011*

**Math**

The Mathematical model C(x)=100x+20,000 represents the cost in dollars a company has in manufacturing x item during a month.
*February 1, 2011*

**economics**

yes
*January 26, 2011*

**chemistry**

I need to find out which structure is more correct: Reaction of the compound C3H8O with CrO3 (oxidizing agent) yields acetone. Which of the three structures is more correct? (My three structures are as follows: 1-propanol, 2-propanol, and methylethyl ether.)
*January 18, 2011*

**algebra**

provide me with a radical expression to simplify
*January 17, 2011*

**algebra**

Mike would like to plant some trees so he needs to use a portion of his existing yard. The perimeter of this rectangular portion needs to be 14 yards and the diagonal is 5 yards. Can you help Mike determine the length and width of this new portion? Mike requested that you show...
*January 16, 2011*

**English**

As she flipped through the newspapers, she saw headlines such as "Food shortages hit Mitika," "Hurricane departs coastline," and "Elkwood ravaged by flooding." Is my apostrophe and comma usage correct? Newspaper headlines are supposed to be ...
*October 17, 2010*

**algebra**

the value is 49, not sure what there asking for in the second part, unless it's just asking you to show your steps.
*October 14, 2010*

**algebra**

0.0025934041088830740483370627371053
*October 14, 2010*

**Chemistry**

1st one is right, the second one cant be right because there is no H on the left side.
*October 14, 2010*

**Math**

x+1 - x+2 = ? --- --- 2x-8 12-3x
*October 3, 2010*

**7th grade**

I agree with Hailey
*September 29, 2010*

**H. Physics **

7.6km at a 26 degree angle ussing signifigant figures
*September 29, 2010*

**11th grade**

in 5.5? two
*September 27, 2010*

**Math**

2d+8=24
*September 12, 2010*

**math**

Find the standard deviation for the given data. Round your answer to one more decimal place than original data. 2,5,47,11,13,48,39,36
*September 3, 2010*

**math**

Consider the following students method of solving the proportion 8/5 = 20/x and determine whether the methods were correct: Richie: First I divided 20 by 8 and got 2 1/2. Then I multiplied 2 1/2 by 5 and got 12 1/2 for my answer. Martha: I think of it this way. Every time a ...
*August 11, 2010*

**Math**

Factor: X⁸ + 2x©ùy©ù + 9y⁸
*July 22, 2010*

**college**

while a patient is having surgery,his doctor notices a small mole.The doctor doesn't think the mole is anthing to worry about,but he decides to remove it to perform a biopsy.What is the doctor guilty of?
*July 9, 2010*

**Speech**

Hi. I have to write a speech for student council vice president...this is what i have. tell me what you think! Hi! I’m Ella and I would like to be your student council vice president. You should vote for me because I am responsible, creative, good with people, and I would...
*May 5, 2010*

**math**

Verify that the circles x2+y2 = 25 and (x−5)2+(y−10)2 = 50 intersect at A = (4, 3). Find the size of the acute angle formed at A by the intersecting circles. You will first have to decide what is meant by the phrase the angle formed by the intersecting circles.
*April 25, 2010*

**Geometry help**

A parallelogram has a 7-inch side and a 9-inch side, and the longer diagonal is 14 inches long. Find the length of the other diagonal. Do you need your calculator to do it? then, (Continuation) Evaluate 72 + 92 + 72 + 92 − 142 − d2, where d is the length of the ...
*April 21, 2010*

**Geometry need help pls**

A. A parallelogram has a 7-inch side and a 9-inch side, and the longer diagonal is 14 inches long. Find the length of the other diagonal. Do you need your calculator to do it? B. (Continuation) Evaluate 72 + 92 + 72 + 92 − 142 − d2, where d is the length of the ...
*April 21, 2010*

** medical terminology**

I read over my material and iam not sure if they are asking or really what they are asking. maybe what are any five terms that have to do with the muscuoskeletal system?
*April 2, 2010*

** medical terminology**

devise memory aids for any five terms relating to the musculoskeletal system
*April 2, 2010*

**Help Plz**

i need help finding the similarities & differences between passover and easter. thnx ella
*January 7, 2010*

**math**

Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. (Round your answer to the nearest cent.) $3,000 balance, 21% rate, $150 payment, average ...
*January 7, 2010*

**3rd grade math**

If the third grader can multiply fractions they can multiply it by a 1/3
*December 10, 2009*

**English**

When do I capatilize the word aunt? I think it's: This is my Aunt Marrianne. Is that right or is the a lowercase? Please explain. Thank You
*December 3, 2009*

**Science**

I am in 6th grade and doing very well so i am not stupid or anything but i dont know if my science fair project is for my grade level. It's What Makes Ice Melt The Fastest. What Do You Think? Thnak You
*November 16, 2009*

**Calculus**

Solve the IVP {y'=-(sinx)y + xexp(cosx) y(0) = 1 Please show me step by step. Do I need to find out if this is exact? Do I use an integrating factor?
*October 7, 2009*

**S.S.**

thnx but i don't think that i am allowed to right about a mmovie thats coming out. anything else? if not thats fine too. thnx soooooooooo much!
*October 1, 2009*

**S.S.**

I need help finding a curent event. It has to be a national advancement in medicine that happened anywhere from this past Sunday to today. plz help thnx -ella
*October 1, 2009*

**english **

what is an adjustment letter?
*September 23, 2009*

**Language Arts (2nd Grade)**

Question: Name 10 Community Things You Can Do To Help The Earth. I Cant Think of Any!! Help
*September 18, 2009*

**chemistry**

Potassium perchlorate has a lattice energy of -599 kj/mol and a heat of hydration of -548 kj/mol. Find the heat of solution for potassium perchlorate when 10.6 g of potassium perchlorate is dissolved with enough water to make 102.7 ml of solution. (J-absorbed) find the ...
*September 18, 2009*

**Chemistry**

The U.S. Food and Drug Administration (FDA) recommends that adults ingest less than 2.4 g of sodium per day. How many liters of softened water, containing a sodium concentration of 6.0×10−2 percent sodium by mass, have to be consumed to exceed the FDA ...
*September 17, 2009*

**Social Studies**

What is the mountain range that stretches across west virginia? thnx
*September 13, 2009*

**math**

i can't figure out how to do this problem: 3(y-4)=-2y-12
*September 6, 2009*

**Science**

Are there such things as pink sheep or is there fur dyed pink?
*June 30, 2009*

**Legal Aspects of Health Information**

If a doctors computerized medical records are compromised by a hacker, who is liable?
*May 27, 2009*

**Legal Aspects of Health Information**

A doctor applies for medical staff privileges at a hospital. What is the hospital administrator required to do?
*May 26, 2009*

**Legal Aspects of Health Information**

Judge Jones is hearing a motion to order release of substance abuse records pursuant to a subpoena....Where should the hearing take place/
*May 26, 2009*

**Health Information Management**

At what point during the course of treatment of a new patient should notice of use and disclosure of health information, required under HIPAA, be given?
*May 21, 2009*

**Medical Law**

What is the difference between contributory negligence and comparative negligence?
*May 20, 2009*

**Legal Aspects of Health Information**

Jane Doe does not want her violent boyfriend to know shes getting an abortion. She asks Dr. John to send all communications to her to a post office box and to only call her at work. What should Dr John do, and what is the legal basis?
*May 19, 2009*

**Confidentiality of Health Information**

Jane Doe does not want her violent boyfriend to know shes getting an abortion. She asks Dr. John to send all communications to her to a post office box and to phone her only at work. If he doesnt, Dr.John could be endangering her. What should Dr. John do, and what is the legal...
*May 19, 2009*

**math**

If you are finding the volume of a cylinder, but the cylinder has a base instead of a diameter or radius... what would you do?
*April 29, 2009*

**child care**

hi im doing my assignment in child care level 3 and i need to answer this question ,(describe ways that parents may participate in a pre school's activites to promote their children's learning and development) and (discuss how a pre school can encourage parents to ...
*April 23, 2009*

**Please proofread**

Do you think my report will be long enough? Mabye I can try to split it off into five paragraphs. Thank you for the advice. I am going to enter it in a writing contest because it is awsome and I am going to publish a book some day. It will be called 'Fun With Old Paint'...
*April 12, 2009*