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Posts by Stephanie

Total # Posts: 1,213

physics
compare and contrast sound and electromagnetic waves in terms of types, speed, etc.

Math
How do you write .79 as a fraction in simplest form?

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!

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 ...

4th grade language
We are working on sequencing events. What comes next VI, VOI, VOIVI and ______. Would the answer be VI?

balance equation
thanks

balance equation
NaPO4 + PbNO3 = what? balance

economics
can you explain to me the main concepts of income in economics

Math
find the mean of 98 89 46 32 and 81?

Math
how do you find the mean of 98 89 46 32 and 81?

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?

history
how did the south with fewer supplies and resources manage to stall a northern victory for four years?

Math
What is half of 3/4?

Math
The sum of Jason's and Elton's ages is 30 years. Jason is 8 years older than Elton. How old is Elton?

Math
The sum of Jason's and Elton's ages is 30 years. Jason is 8 years older than Elton. How old is Elton?

Thanks
Thanks

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

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 ...

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&...

English
What is an adverb clause?

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

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 ...

French 1
grand-pères, granparents petite-fille, grandaughter petit-fils grandson

algebra
t/3<13

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?

English/Latin Translation
How do you say "live free" in latin?

AP Stats
thanks for your help!!:)

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...

algebra
An architect makes $75.25 per hour. What will his/her gross income be after completeing a 95-hour project?

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.

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

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

chemistry
how many grams are in 5.66 mol of CaCO3? (the three is the subscript)

English
Discuss Dickens' use of symbol in GREAT EXPECTATIONS- symbolic names, settings, characters, actions, etc.

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 ...

Chemistry
Thank you. I rechecked my problem. Should the power be positive? Or is it another power instead?

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&#...

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!!!

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.

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?

math
i mean -5 for .5

math
why would the be a value c for 1<c<3 that the h'(c)=.5

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 the particles moves?? i was able to find the velocity and acceleration formula. but i have no idea how to ...

Stats: need help please
thanks

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 ...

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 = ...

Pre-Algebra
Thank you again! Really appreciate it.

Pre-Algebra
2/7y = 18 (2/7y) / 2/7 = 18 / (2/7) y = 63

Pre-Algebra
does y = 63

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

Pre-Algebra
Thank You all! I was trying to help my daughter and was all confused.

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

psychology
underlying causes of unipolar and bipolar disorders?

it doesn't work
28=1 is the value of x and that doesn't work

please help; calc
when you plug it in the original eqn. it doesn't work

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.

science
it's a small amount, it doesn,t have to be very precise, just the average

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?

optimal radius
how do i find the optimal radius?

Calculus-Optimal Form: need help... please
thnx! :)

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=¡&...

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

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

math
a) 2/1 b) 2/1 I think this is right but you're gonna have to double check again

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.

Social Science
What is a polygenous relationship?

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...

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 ...

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 ...

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...

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

physics
25 & 20

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?

science
how is rocks absolute age is determined?

math
explain how we use pi in the real world.

math
what is the true meaning and exact value of pi?

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&#...

Critical Thinking
Are your answers correct?

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.

Trinomials
I need help with trinomials today. x^4 + 2x^2 - 24 and -x^2 - 5x + 14

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!

MATH: TRINOMIALS
Hello. Can you explain to me how to factor the following. 30x^2 - 48x x2 + 6x + 7

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

earth
WHEN DID PRIMORDIAL OCEANS FORM?

criminal justice
can anyone put in lamen terms on what or how annotated bibligography?

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)=

criminal justice
what are two main functions of criminal law

Math
A man selling fruit has only three weights. But with them he can weigh any whole number of kilograms (from 1 kg to 13 kg) inclusive on his balance. What weights does he have? Responses math - Kalyan, Friday, September 5, 2008 at 4:38am The man had 1kg, 3kg and 9 kg weights. ...

math
How did you get this answer?

math
A man selling fruit has only three weights. But with them he can weigh any whole number of kilograms (from 1 kg to 13 kg) inclusive on his balance. What weights does he have? I can't figure this out

algebra
A man selling fruit has only three weights; but with them he can weigh any whole number of kilograms from 1 kg up to 13 kg, inclusive on his balance. What weights does he have?

psychology
Can you please tell me exactly what intrinsic means ? I am looking it up online and I still cannot understand the definition.

Chemistry- HWK CHECK
5 is B. I really find it mean that people deliberately put the wrong answers on this site. Is the pursuit of a decimal's worth of increased standing in the class distribution really worth lessening your character? Why can't we just help each other out fairly?

Law and Ethics
I am taking a course at Penn Foster and was having problems myself finding this information. It takes awhile but the AMA site really is helpful. Try looking for article E 5.07 and H 325.971. Also go to Google books and search the book Medical Ethics. It lets you preview the ...

Reseach paper
Should written policies be developed for abbreviation usage? If yes, what should the policies contain?

Algebra
what is factoral equations????

science- need some help
ms. Sue I have to do a powerpoint presentation I do not know where to start I am having a serious hard time on this 4th of July. Please help. I need some information that can help me start Power Pointpresentation that describes environmental benefits and challenges of ...

humanities
Aeneas is the main character. What book is he in? Who is the author?

Math
she had a bum steer

Chemistry 1
Does anyone know what websites are good to use for Chemical Reactions and balancing equation. I have a test tomorrow, and i need to really practice those. Thanks

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