Monday

November 30, 2015
Total # Posts: 1,126

**Algebra ll**

down parabola w/ a max at (-2,3). intersect x-axis at (1,0) and (-5,0).
*March 24, 2009*

**Chem: stoich**

would the answer for the first question be .06654 g H2O?
*March 24, 2009*

**Chem: stoich**

I burned a candle for 3 minutes. It started with a mass of 38.53g (C25H52). It ended with a mass of 38.48g. What mass of water was produced in three minutes? If I burned the candle all day, what mass of the candle would react?
*March 24, 2009*

**Chem problem- percent yield**

thanks for helping. :)
*March 22, 2009*

**Chem problem- percent yield**

Is the percent yield 91.5%?
*March 22, 2009*

**Chem problem- percent yield**

Heating an ore of antimony (Sb2S3) in the presence of iron gives the element antimony and iron(II) sulfide. Sb2S3 (s) + 3Fe(s) ¨ 2Sb(s) + 3FeS(s) When 15.0 g Sb2S3 reacts with an excess of Fe, 9.84 g Sb is produced. What is the percent yield of this reaction?
*March 22, 2009*

**social studies**

Thanks again =] Very much appreciated
*March 22, 2009*

**social studies**

Sorry to keep posting, I thought I had this one figured out, however it is the last one that I have. She helped to end the Bourbon Triumvirate and pushed for Women Rights Hints - 13 letters - ends with an t _ n
*March 22, 2009*

**Social Studies**

I think Ethnic War will fit it properly. Thank you very much =]
*March 22, 2009*

**Social Studies**

This form of violence is used when two races want to hurt each other. hints - it's 9 letters long - It starts with an E
*March 22, 2009*

**Social Studies**

What is the name of the group formed by three white supremacists who tried to run Georgia after the Civil War. hints - it's 18 letters long - The second letter is an O
*March 22, 2009*

**physics**

compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
*March 10, 2009*

**physics**

compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
*March 10, 2009*

**physics**

compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
*March 10, 2009*

**Math**

How do you write .79 as a fraction in simplest form?
*March 10, 2009*

**intro to economics**

Re: Ray- ya its a homework help website, this student posted the entire assignment word for word and expects others to give the answers. Very different than actually learning this info herself. LOL that this student got busted!
*March 2, 2009*

**intro to economics**

I had econ 104 last semester with Sarah Frazelle and she very THROROUHGLY covers the EXACT concepts she puts on tests in homework in her notes. We really never did used the text b/c it was always easier to use the notes rather than dig through chapter after chapter. She also ...
*March 2, 2009*

**4th grade language**

We are working on sequencing events. What comes next VI, VOI, VOIVI and ______. Would the answer be VI?
*March 1, 2009*

**balance equation**

thanks
*February 26, 2009*

**balance equation**

NaPO4 + PbNO3 = what? balance
*February 26, 2009*

**economics**

can you explain to me the main concepts of income in economics
*February 26, 2009*

**Math**

find the mean of 98 89 46 32 and 81?
*February 25, 2009*

**Math**

how do you find the mean of 98 89 46 32 and 81?
*February 25, 2009*

**Math**

A tennis court is 6 yards wide and 10 yards long. A football field is 60 yards wide and 110 yards long. How many tennis courts fit onto the football field?
*February 25, 2009*

**history**

how did the south with fewer supplies and resources manage to stall a northern victory for four years?
*February 23, 2009*

**Math**

What is half of 3/4?
*February 19, 2009*

**Math**

The sum of Jason's and Elton's ages is 30 years. Jason is 8 years older than Elton. How old is Elton?
*February 17, 2009*

**Math**

The sum of Jason's and Elton's ages is 30 years. Jason is 8 years older than Elton. How old is Elton?
*February 17, 2009*

**Thanks**

Thanks
*February 12, 2009*

**chemistry: equations and reactions**

identify the products when the following substances decompose: 1) binary compoound 2) metallic hydroxide 3) metallic carbonate 4) the acid H2SO3
*February 12, 2009*

**World Geography**

South America is a realm of diverse cultural landscapes and numerous immigrant sources. Some countries that are relatively homogeneous culturally, such as Columbia and Venezuela, are as divided politically and economically as are other countries with strong and obvious ...
*February 10, 2009*

**World Geography**

Brazil is the giant of S. America, and it has the largest and most productive economy. But Brazil is unlike other S. American states in a number of ways (ie. no megacity on a scale with San Paulo anywhere else in the realm) so that what locals call the "Brazilian model&...
*February 10, 2009*

**English**

What is an adverb clause?
*February 5, 2009*

**Biochemistry**

Find the net charge of cysteine at pH 8.75 using the follwing pka values: carboxyl group has pka=1.9 amino group pka= 10.7 side chain=8.4
*January 19, 2009*

**Math**

Suppose you have a lemonade stand, and when you charge $1 per cup of lemonade you sell 50 cupes. But when you raise your price to $2 you only sell 25 cups. Write an equation for the nuber of cups you sell as a function of the price you charge. Denote "C" for number ...
*January 19, 2009*

**French 1**

grand-pères, granparents petite-fille, grandaughter petit-fils grandson
*January 8, 2009*

**algebra**

t/3<13
*January 7, 2009*

**English/Latin Translation**

translate this sentence for me please into latin? -the journey to the spanish town is long but we shall walk with great speed?
*January 7, 2009*

**English/Latin Translation**

How do you say "live free" in latin?
*January 7, 2009*

**AP Stats**

thanks for your help!!:)
*January 2, 2009*

**AP Stats**

Surveys indicate that 5% of the students who took the SATs had enrolled in an SAT prep course. 30% of the SAT prep students were admitted to their first choice college, as were 20% of the other students. You overhear a high school student say he got into the college he wanted...
*January 2, 2009*

**algebra**

An architect makes $75.25 per hour. What will his/her gross income be after completeing a 95-hour project?
*December 14, 2008*

**algebra**

A salesperson earns a salary of $500.00 per week, plus a commision of 2% of her total weekly sales. write an algebraic expression that computes the total weekly salary. Let m represent the total weekly sales.
*December 14, 2008*

**Chemistry**

What volume will the following quantities of gases occupy at STP? 5.0 g of H(2) subscript=2 228.0 g of N(2) subscript=2
*December 11, 2008*

**chemistry**

1. how many grams are in 5.66 mol of CaC03 (3 is the subscript)? --------------------------------------- mass= 5.66 mol CaCO3 x mass/1 mol CaCO3 How do i finish this off? 2. find the number of moles in 508g of ethanol (C2H6O)? 2 and 6 are subscripts
*December 10, 2008*

**chemistry**

how many grams are in 5.66 mol of CaCO3? (the three is the subscript)
*December 10, 2008*

**English**

Discuss Dickens' use of symbol in GREAT EXPECTATIONS- symbolic names, settings, characters, actions, etc.
*December 7, 2008*

**stats: need help please**

4.34 Keno is a favorite game in casinos, and similar games are popular with the states that operate lotteries. Balls numbered 1 to 80 are tumbled in a machine as the bets are placed, then 20 of the balls are chosen at random. Players select numbers by marking a card. The ...
*December 7, 2008*

**Chemistry**

Thank you. I rechecked my problem. Should the power be positive? Or is it another power instead?
*December 6, 2008*

**Chemistry**

Calculate the wavelength of the yellow light emitted by a Sodium Lamp if the frequency is 5.10 X 10^14 Hz. Formula: Wavelenght (lamda)= speed of light, 3 X 10^8(c)/frequency, 5.1 X 10^14. My answer was 5.9 X 10^-5. Is this anywhere near correct? Please explain the steps if I&#...
*December 6, 2008*

**appeal letter**

I have received a exclusion from uni, because I fail 3 courses this semester.So school ask me to write an appeal letter in order to get a chance of re-enrollment. Please help me and give me some advices, thanks a lot!!!
*December 5, 2008*

**BUS 210**

Describe a business scenario, either real or fictional, that depicts each of the following forms of business organization: Joint-stock company, Limited liability company, Partnership, and Sole proprietorship.
*December 3, 2008*

**4th grader needs help>>>Transporation**

I was asked to interview a grandparent about what New York's public transportation was like in the past. What kinds of questions could I ask him or her?
*November 29, 2008*

**math**

i mean -5 for .5
*November 25, 2008*

**math**

why would the be a value c for 1<c<3 that the h'(c)=.5
*November 25, 2008*

**11th grade**

a particle starts at time t=0 and moves on a number line so that its position at time t is given by x(t)= (t-2)^3(t-6) what is the farthest to the left of the origin that hte particles moves?? i was able to find the velocity and acceleration formula. but i have no idea how to ...
*November 23, 2008*

**Stats: need help please**

thanks
*November 23, 2008*

**Stats: need help please**

two golfers plan to enter a tournament where the score will be determined as a team score. golfer x has a mean score of 85.4 and St. Deviation of 3.2 while golfer y has a mean score of 89.6 and St. deviation of 4.1. what is their expected team score and the variation ...
*November 23, 2008*

**Maths**

The first odd number can be expressed as 1 = 1squared - 0squared. The second odd number can be expressed as 3 = 2squared - 1squared. The third odd number can be expressed as 5 = 3squared - 2squeared. a) Express the fourth odd number in this form. (Am I right in saying 7 = ...
*November 20, 2008*

**Pre-Algebra**

Thank you again! Really appreciate it.
*November 19, 2008*

**Pre-Algebra**

2/7y = 18 (2/7y) / 2/7 = 18 / (2/7) y = 63
*November 19, 2008*

**Pre-Algebra**

does y = 63
*November 19, 2008*

**Pre-Algebra**

What is the answer to this one? 4/7y - 8 = 2/7y + 10 4/7y - 8 = 2/7y + 10 (4/7y - 8) - 2/7y = (2/7y + 10)- 2/7y 2/7y - 8 = 10 2/7y - 8 + 8 = 10 - 8 2/7y = 2 (2/7 y)/ 2/7 = 2/1 / 2/7 y = 2/14 or 1/7
*November 19, 2008*

**Pre-Algebra**

Thank You all! I was trying to help my daughter and was all confused.
*November 19, 2008*

**Pre-Algebra**

13 - t = -t + 7 (13 - t) - 13 = (-t +7) -13 -t = -t - 6 -t + t = (-t - 6) + t 0 = -6 This makes no sense to me.. What is the answer to the problem 13 - t = -t + 7
*November 19, 2008*

**psychology**

underlying causes of unipolar and bipolar disorders?
*November 15, 2008*

**it doesn't work**

28=1 is the value of x and that doesn't work
*November 12, 2008*

**please help; calc**

when you plug it in the original eqn. it doesn't work
*November 12, 2008*

**please help; calc**

original curve: 2y^3+6(x^2)y-12x^2+6y=1 dy/dx=(4x-2xy)/(x^2+y^2+1) a) write an equation of each horizontal tangent line to the curve b) the line through the origin with the slope .1 is tangent to the curve at P. Find x and y of point P.
*November 12, 2008*

**science**

it's a small amount, it doesn,t have to be very precise, just the average
*November 7, 2008*

**science**

Please help me!!! I need to create an expieriment but I need to find a way to measure the amount of co2 in an enclosed small space....is it possible? is there a way?
*November 7, 2008*

**optimal radius**

how do i find the optimal radius?
*November 4, 2008*

**Calculus-Optimal Form: need help... please**

thnx! :)
*November 4, 2008*

**Calculus-Optimal Form: need help... please**

Suppose you are designing a coffee creamer container that has a volume of 48.42 cubic inches. Use the surface area and volume of a cylinder to develope an eqn. relating radius r and surface area S. ¡Ç=pi=3.14 S=2¡Çr^2+2¡Çrh V=¡&...
*November 4, 2008*

**Calculus**

the curve: (x)(y^2)-(x^3)(y)=6 (dy/dx)=(3(x^2)y-(y^2))/(2xy-(x^3)) a) find all points on the curve whose x-coordinate is 1 and write an equation for the tangent line of each of these points b)find the x-coordinate of each point on the curve where the tangent line is vertical
*November 2, 2008*

**half-life of radioisotope**

A radioisotope has a half-life of 4 days. How much of a 20-gram sample of this radioisotope remains at the end of each time period? 1) 4 days 2) 8 days
*October 31, 2008*

**math**

a) 2/1 b) 2/1 I think this is right but you're gonna have to double check again
*October 31, 2008*

**Math**

I understand problems like this but with just a variable in the first one. Here, it has 12. This throws me off. factor 12m^2 + 25m + 12 = 0.
*October 29, 2008*

**Social Science**

What is a polygenous relationship?
*October 28, 2008*

**Genetics**

The question is as follows: The round trait is dominant over recessive wrinkled peas. A homozygous round pea mates with a homozygous wrinkled pea. The resulting F1 generation is self crossed and 900 round pea plants and 100 wrinkled plants are observed. What is the penetrance...
*October 22, 2008*

**Biology(Anatomy&Physiology)**

1)How many covalent bonds does it take to satisfy the carbon atom? 2)In the body, carbohydrates are stored in the form of: 3)Name the portion of an enzyme that attaches to the substrate. 4)The coiling of the protein chain backbone into an alpha helix is referred to as the 5)A ...
*October 15, 2008*

**Biology(Anatomy&Physiology)**

1)Which organelle makes most ATP 2)The chemical reaction that joins two amino acids is called 3)In a single molecule of water which type of bond holds the H to the O? 4)Which type of chemical bond results from the transfer of an electron from one atom to another 5)A chemical ...
*October 15, 2008*

**Biology(Anatomy&Physiology)**

1)Which group of organic molecules makes up your genetic code 2)A substance which tends to resist a change in the pH of a solution is called a 3)Which buffers is the most common in the body 4)Which of molecules is primarily made of CHON 5)Which is the building block or monomer...
*October 15, 2008*

**Anatomy**

1)Which two molecules/chemicals make up the backbone of the DNA molecule? 2)Which organelle makes most ATP? 3)AMP would have ________ phosphate(s) attached to it? 4)Which is the smallest carbohydrate 5)Which type of chemical bond involves a sharing of electrons
*October 15, 2008*

**physics**

25 & 20
*October 15, 2008*

**physics**

Two concurrent forces have a maximum resultant of 45 newtons and a minimum of 5.0 newtons. What is the magnitude of each of these forces?
*October 15, 2008*

**science**

how is rocks absolute age is determined?
*October 9, 2008*

**math**

explain how we use pi in the real world.
*October 8, 2008*

**math**

what is the true meaning and exact value of pi?
*October 8, 2008*

**physics**

ok, so you have to find the cos of x-axis: v*cos=(300m/s)cos 55 degrees, and then the sin of your y-axis: v*sin= (300m/s)sin 55 degrees. The vx (x-axis)is always constant. Then you have to use the formula: x=x(i)*t+ 1/2axt^2 to get the x- coordinate, y=y(i)*t +1/2ayt^2. That&#...
*September 30, 2008*

**Critical Thinking**

Are your answers correct?
*September 29, 2008*

**ALGEBRA -- long division**

Find each solution using long division. Show your work. Show that x + 1 is NOT a factor of... 2x^3 + x^2 - 11x - 30. Show that x - 3 IS a factor of 2x^3 - 11x^2 - 11x^2 + 12x + 9.
*September 25, 2008*

**Trinomials**

I need help with trinomials today. x^4 + 2x^2 - 24 and -x^2 - 5x + 14
*September 24, 2008*

**Chemistry**

Help! A solution is made by dissolving 33.7 g of MgCl2 in .35L of H20. What is the mass of the solvent? The density of water is 1.oo g/ml. Thanks!
*September 22, 2008*

**MATH: TRINOMIALS**

Hello. Can you explain to me how to factor the following. 30x^2 - 48x x2 + 6x + 7
*September 21, 2008*

**algebra**

Hello. Can you explain to me how to factor the following? 30x^2 - 48x 6x^2 + 7xy - 20y^2 Thank you.
*September 21, 2008*

**earth**

WHEN DID PRIMORDIAL OCEANS FORM?
*September 18, 2008*

**criminal justice**

can anyone put in lamen terms on what or how annotated bibligography?
*September 10, 2008*

**7th grade**

Help me solve this problem, I am lost here. These are integers, 15-12-8= also 4-(-7)-9= and -11-(-5)-(-6)=
*September 9, 2008*

**criminal justice**

what are two main functions of criminal law
*September 7, 2008*