Saturday

April 25, 2015

April 25, 2015

Total # Posts: 1,585

**calculus**

Find an expression for the function whose graph is the given curve. a) The bottom half of the parabola x+(y-1)^2=0 b) The top half of the circle (x-1)^2 + y^2= 0 I think I have a vague idea of what I need to have in my expression for b; I know it's a circle with a center (...
*September 11, 2007*

**maths**

please can some one help me..? Part a - O is the centre of the circle, and P , Q are points on the circumference of the circle, with the angle POQ being a right angle. The radius of the circle is 3 cm. Choose the option that is the area of the smaller sector POQ, correct to 3 ...
*September 11, 2007*

**calculus/graphing calculator help**

We were given a worksheet on modifying functions with the equation y=Af(Bx+C)+D. The first function we're given is y1=f(x)= x + x^2 and we're supposed to graph it. Then we're told to graph y2=2f(x), and we're given instructions on how to enter it [y2=2 ->...
*September 9, 2007*

**Biology**

What type of tissue are neurons?
*September 4, 2007*

**Biology**

What is the difference between a simple colony and a complex colony?
*September 4, 2007*

**Spanish**

*facilitated
*August 31, 2007*

**Spanish**

I've actually cleaned up my translation a bit, so it reads more like: The collapse of the Roman empire facilitations the invasion of Spain from 409 d.C... but I'm still having trouble with the second half.
*August 31, 2007*

**Spanish**

Can someone help me translate this sentence? It was in a packet we were given for reading but I don't think I'm understanding it correctly. La crisis del Imperio Romano facilitó la invasión de España a partir del año 409 d.C., por varios ...
*August 31, 2007*

**calculus**

We were asked to solve the problem 1/x < 4. I solved it like so: 1<4x 1/4<x and wrote my answer in interval notation as (1/4, infinity). However, the answer in the back of my book said the answer was the union between (negative infinity, 0) and (1/4, infinity). How do...
*August 31, 2007*

**science**

What is the effect of an insoluble impurity, such as sodium sulfate, on the observed melting point of a compound?
*August 15, 2007*

**bio**

Under what situation(s) can a single environment be both coarse-grained and fine-grained. I was thinking in an envirnomental where many organisms exist, such as a field. To a herbivorous insect, it would be course-grained while to a cow or horse it would be fine-grained. But ...
*July 30, 2007*

**Government**

can federal government abuse its power?
*June 15, 2007*

**math (domain)**

whats the domain and range of sine and tan? The sine ranges from -1 to +1. Its domain is all postive and negative numbers. I will be happy to critique your thinking on tangent.
*June 6, 2007*

**Chemistry**

Describe the apparent relationship between H30+ and OH- concentrations when an endpoint is reached in an acid-base titration
*May 30, 2007*

**Physics Thanks**

Please help... Let g be the acceleration due to gravity at the surface of a planet of radius R. Which of the following is a dimensionally correct formula for the minimum kinetic energy K that a projectile of mass m must have at the planet's surface if the projectile is to ...
*May 13, 2007*

**Physics Work and Energy, Momentum**

Let g be the acceleration due to gravity at the surface of a planet of radius R. Which of the following is a dimensionally correct formula for the minimum kinetic energy K that a projectile of mass m must have at the planet's surface if the projectile is to escape from the...
*May 13, 2007*

**Physics HELP**

1.If a particle moves in a plane so that its position is described by the functions x=A*cos(wT) and y=A*sin(wT), the particle is ( w-angular velocity, T-period) A) moving with constant speed along a circle B) moving with a varying speed along a circle Thanx! Note that x^2 + y^...
*May 13, 2007*

**reading**

sentense with 11 elephant Please keep in mind that we don't do students' homework for them. Once you write a sentence, please re-post and someone here will let you know if you're right or need to work on it some more. =)
*May 9, 2007*

**Science**

state the number of electrons either lost or gained in forming each ion. Br- As3-
*April 25, 2007*

**ss**

The british army was trapped at yorktown by? a.an army led by friedrich von stueben b.a freet of spanish warships c. a fleet of french warships d. guerella fighters led by francis marion. Isnt it C I want this paper to be correct in all the answers as much as possible please ...
*April 23, 2007*

**s.s**

Which statement BEST describes the mood of the continental congress in May 1775? a. few delegates wanted a formal break all ties with britian. b.most delegates wanted to break all ties with britian. c.A majority of delegates believed that war with britian was inevitable. d....
*April 23, 2007*

**S.S**

The question is Wich statement BEST describes the mood of the continental congress in may 1775? a.Few delegates wanted a formal break with britian. b.most delegates wanted to break all ties with britian. c.a majority of delegates believed that war with britian was inevitable. ...
*April 20, 2007*

**maths**

Compass bearings of a carin are taken from two points A and B, 400 m apart, along a strsight north-south path, A being due north of B. the bearings of the carin from A and B are 110 degrees and 80 degrees, respectively. choose the two options which give the distances from A ...
*April 19, 2007*

**maths**

An investor invests £20 000 over three years in a scheme which offers compound interest of 4.5%, compound annually. Which one option gives the amount of money in the scheme after 3 years, rounded to the nearest pound? A. £22 891 B. £22 700 C. £22 833 D...
*April 18, 2007*

**maths**

Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not change. C. A particle which has zero ...
*April 18, 2007*

**calc.**

find the sum of the series of (-2)^n/3^n+1. This is an alternating series... what if we rewrite it as an= (1/3)* (-2/3)^(n) Divide any nth term by the n-1 term and see if you get a ratio term r. This might be a geometric series.
*April 17, 2007*

**maths**

which three statements are true? a) if x= -10^4 then log 10 = -4 b)if x= 2^8 then log 2x = 8 c) log2 2= 4 d) if x= 3 then log10 3=x e) log 10 256-2log 10 a/log 10 b f)log 10 (a-b)= log 10 a/log 10 b g) the gradient of the graph of y= 2x^x at x= 2 is 2e^e h) the gradient of the...
*April 17, 2007*

**calc**

determine whethere the sequence a(n)=nsinn/n^3 converges or diverges. Explain why it does or does not converge. If it converges find the limit. Sin(n) is always between -1 and 1. So, you have: -1/n^2 < a(n) < 1/n^2 Both the lower bound and the upper bound converge to ...
*April 17, 2007*

**calc**

for the parametric curve defined by x=3-2t^2 and y=5-2t ...sketch the curve using the parametric equation to plot of the point. use an arrow to indicate the direction of the curve for o<t<1. Find an equation for the line tangent to the curve at the point where t=-1. x=3...
*April 17, 2007*

**Social Studies**

I have to do a project and I can't get motivated to start!! I want a good grade, but I don't know how to convince myself to get started!! PLEASE HELP!!!!!!! Sometimes motivation just doesn't come. You can't wait until you feel like doing it. I urge you to start...
*April 15, 2007*

**Calculus**

find the equation for an ellipse that satisfies the following condition Vertices at (-3,1) and (9,1) one focus at (7,1) I will assume you know the general equation of an ellipse and its properties in terms of a,b and c. the centre would be the midpoint of (-3,1) and (9,1) ...
*April 14, 2007*

**Calculus**

Determine whether the sequence A(n)=nsinn/n^3 converges or diverges. Eplain why it does or does not converge. It is converges find the limit
*April 14, 2007*

**Math**

Evaluate. (15 – 5) ÷ [(12 ÷ 2 • 2) – 2] I think the answer is 10. Is this correct. Correct. Please Excuse My Dear Aunt Sally applies.
*April 8, 2007*

**Math**

make a star. each intersection and vertex is a tree.
*April 3, 2007*

**Science**

We are having a science test soon and there is a question on the studie guide that I am not sure about. What is the differance between Michanical advantage and Ideal Michanical advantage? Isnt it frictions. Yep you are right it is friction
*April 2, 2007*

**calculus**

The integral of 3x^2 - 4x + 1 equals x^3 - 2x^2 + x. Is this always correct? Where is the constant of interation? wouldn't x^3 - 2x^2 + x + 23 also be correct?
*March 31, 2007*

**criminology**

can anyone give me some websites with arguments in favor of and against the just desert theory? Thank you for using the Jiskha Homework Help Forum. Here are some things online: 1. http://en.wikipedia.org/wiki/Justice (definition) 2. web.missouri.edu/~umcasklinechair/on-line%...
*March 31, 2007*

**Accoutning**

Identifying cost flows in process cost system
*March 30, 2007*

**dogs**

Does any good web sites to look up a dog called a Basenjis? Great site: http://www.canismajor.com/dog/basenji.html ca9ns look up basenji dot org
*March 29, 2007*

**Science**

Name a compound machine and tell what simple machine it contains? pencil sharpiner wedge and wheel and axle
*March 27, 2007*

**Science**

How does friction affect the mechanical advantage of a machine? It lowers it
*March 27, 2007*

**Economics- Exogenous Demand/Supply Shocks**

I need to know which way aggregate demand (AD) shifts according to scenarios and why: 1) Economic booms in both Japan and Europe result in massive increases in orders for exported goods from the United States. 2) As part of its countercylical policy, the government both ...
*March 3, 2007*

**WWI**

"One of the ironies of World War I was that in a war 'to make the world safe for democracy,' the government attacked the civil liberties that make democracy possible." I don't know what you're supposed to do with that (quotation?), but the search ...
*February 28, 2007*

**science**

what happens to the load on a bridge that carries the Goeta Canal when a boat passes slowly through the canal? The Goeta canal in Sweden is not carried by a bridge. There are bridges over it. The loads on the bridges do not depend upon water traffic below.
*February 14, 2007*

**math magic square**

on a four by four grid distribute the numbers 1 through 8 and -1 through -8 so that all horizontal, vertical and main diagonals equal zero http://mathworld.wolfram.com/MagicSquare.html You have to b a smart kid to answer this soo you cant you silly person i am an 8th grade ...
*February 6, 2007*

**Chemistry**

Which solution has the lower freezing point? 90.0 g CH3OH in 100. g H2O 180.0 g CH3CH2OH in 200. g H2O I have worked this problem for someone within the last 3-4 days. delta T = kf m kf is not needed for this problem. change 90 g CH3OH and 180 g CH3CH2OH to mols. Change 100 ...
*January 24, 2007*

**Chemistry**

The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 8.50 g of naphthalene (C10H8) in 425 g of benzene (Kf of benzene = 4.90°C/m)? I worked this problem for someone just a couple of days ago. delta T = kf m kf = 4.90 m = molality = mols/...
*January 24, 2007*

**Biology**

Why does protein stain yellow in ninhydrin?
*January 24, 2007*

**Biology**

How many types of amino acids are there in milk?
*January 24, 2007*

**Biology**

Why is milk vitamin fortified? What disease might this prevent? Pasteurizing milk destroys many vitamins. The have to be re added. One of the added vitamins, Vitamin D, prevents Rickets. What happens when the pH of milk is adjusted to 4.7?
*January 24, 2007*

**Biology**

Does milk contain all the macronutrients necessary in the human diet? Yes, for a normal human. What milk does not have, the body can make from what milk has. There are eight essential saccarides: Glucose Galactose Mannose Xylose Fucose (NOT fructose) N-acetylgalactosamine N-...
*January 24, 2007*

**Vocabulary**

What is an enigma? I think something that's an enigma is very complicated, but I'm not sure. An enigma is mysterious and puzzling. Check this dictionary site for more information. http://dictionary.reference.com/browse/enigma For each word, write a sentence that uses ...
*January 22, 2007*

**Pysical Features**

Can you give me a breif 2 page summary of all the physical features of Africa Kelly , we don't do your homework for you. Here are sites that will give you good information. http://library.thinkquest.org/16645/overview.shtml http://www.mapsofworld.com/physical-map/africa.htm
*January 14, 2007*

**had a few ideas, need some more.**

this is the question we have for my software application class... To explain why commonality is important, pcmag reminds us how the 2000 Presidential election was affected by apparently confusing punch cards in Florida. In that scenario, the interaction of humans with ...
*January 10, 2007*

**Need some more examples to research**

this is the question we have for my software application class... To explain why commonality is important, pcmag reminds us how the 2000 Presidential election was affected by apparently confusing punch cards in Florida. In that scenario, the interaction of humans with ...
*January 6, 2007*

**Physics**

A 17.0 kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 220N and breaks as the elevator accelerates. What was the elevator's minimum acceleration (magnintude and direction)? Please show me how to do this in addition...
*January 2, 2007*

**food**

i love bacon, who knows were you get it for a cheap price I bought bacon today at my local grocery store in Michigan. Most brands were $4.00 a pound, with a couple of brands above and below that price.
*December 17, 2006*

**Math- Geometry Proofs**

can u give me some problems on proofs so i could study for my math test today
*November 21, 2006*

**written communication**

Write a letter to a bank that made mistakes on my checks while keeping goodwill. http://owl.english.purdue.edu/handouts/pw/index.html#sub6 On this webpage, be sure to go into the first two links under Letters, Memos, and Reports. http://grammar.ccc.commnet.edu/grammar/corresp/...
*November 15, 2006*

**acids and alkalis**

i need to know more about bludy acids tell me more please help me now i need it for friday help me now please it is anoying u do not tell us alot ey do u help us sum of us neeed help and u will not give it to us u are not helping alot it is anoying tell me alot more
*November 4, 2006*

**Chemistry**

How do I make NH3 to NH4? How would write an ionic equation? Can you show me how to do it? Thank you so much! NH3 + CuSO4 -> NH3 adds a hydrogen ion (from HCl or another source of H^+) to become NH4^+. There is no such animal as NH4 as a neutral material. For the equation, ...
*October 22, 2006*

**math**

A certain football league has the following scoring system: - each field goal counts for 5 points - each touchdown counts for 3 points The only way to score points is with some combination of field goals and touchdowns. They have noticed that not every score is possible in ...
*October 15, 2006*

**Math**

A certain football league has the following scoring system: - each field goal counts for 5 points - each touchdown counts for 3 points The only way to score points is with some combination of field goals and touchdowns. They have noticed that not every score is possible in ...
*October 15, 2006*

**music**

what is the defination for bimary form in music???????????????????????????? If you truly mean bimary, here are the results I got when I searched in Google: http://www.google.com/search?q=music+bimary+form&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:...
*September 24, 2006*

**physics**

A firefighter of mass 120 kg slides down a vertical pole with an acceleration of 4 m/s per second. What is the friction force that acts on the firefighters? In this case, the friction force is the force that is acting against gravity. Use F=M*a If g=9.8m/s^2 and the ...
*September 20, 2006*

**transportation**

what are transportation barriers Please clarify your question. Are you asking about barriers to transportation in general -- major rivers, steep mountains, etc.? Or are you asking about transportation barriers for handicapped people? Your question is unclear. There are many ...
*September 16, 2006*

**maths! please help me it is an emergency!!!!!!!!!!**

what is the fibonacci sequence and what is its relationship to the golden ratio? http://www.google.com/search?q=fibonacci+golden+ratio&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official Many websites here that can help you -- especially the very first ...
*September 16, 2006*

**math**

how do you measurement measure what?
*September 13, 2006*

**science**

how much did the first microscope magnify? i think it magnified from 6x to 10x....from all the research i gathered... how much does the first microscope magnify
*September 12, 2006*

**science**

Who invented the first microscope and what did it look like? http://www.cas.muohio.edu/~mbi-ws/microscopes/fathers.html
*September 12, 2006*

**Chem**

Help! I'm not suppose to react Iron Chloride with Silver Nitrate in order to get Iron nitrate. If i'm suppose to keep one of the above ingredients and obtain a pure dry sample, what should i do? I don't know the question. Why are you not supposed to react the two? ...
*September 8, 2006*

**math**

just an algebra question. how would you solve: (3x^2 +5)(3x^2 +5) ^ means power :] Since you have not given us an equation, it is impossible to "solve" your problam. Please repost with the complete equation, so we can help you. I hope this helps a little. Thanks for ...
*September 5, 2006*

**Algebra :]**

What is the doamin and range of: y= square root of (3-2x) The domain must be non-negative when we have a square root. Thus 3x-2 is greater than or equal to 0. The range will be non-negative too. All real y =>0. verify this.
*September 5, 2006*

**algebra!**

If the measure of angle A is doubled and then decreased by 10 while the complement of angle A is decreased by one-third of itself, then these two anlges formed are still complementary. Find the supplement of angle A. Please explain so i could understand. thank you ! Isn't ...
*August 31, 2006*

**MATH Trouble**

I have no idea what this problem means: For how many two-digit numbers if the ones digit larger than the tens-digit? Can you find a systematic way to arrive at the number? Ok, every 2-digit number looks like xy, where x is the 10's digit and y is the one's digit. It ...
*August 30, 2006*

**spanish(foriegn language)**

i really need help with these spanish words.i just started my first spanish class, so those who have already had spanish, it shouldnt be to hard.translate the following please: aqui,tengo(not tango.lol),te llamas,soy,eres,yo,tu,? de donde?,de, ?eres tu de,and finally tengo ...
*August 29, 2006*

**Advanced Algebra**

In the definition of intercepts, it says THE y-intercept, but AN x-intercept. Sketch a graph which shows that a function could have more than one x-intercept. Explain why a fuction could not have more than one y-intercept. How about the x-axis? If it had two y intercepts then ...
*August 29, 2006*

**chemistry**

I have two Chemistry related questions that were in my AP Chem summer packet. The first has to do with Stoichiometry. It says, "Calculate the number of moles, molecules, and atoms in 60.0 g of boron triflouride. I calculated that there are .885 moles, and 5.33 x 10^23 ...
*August 28, 2006*

**algebra**

what would a graph look like if.. y= (3/4)x + 2 and the domain is... x = {-8,-4,0,4,8} would it be discrete or continous? Kelly you should be able to see that the first equation is a line. You should be able to determine the slope and intercept as well. Since the domain is a ...
*August 27, 2006*

**Math!!!!**

13.75 is the same as 12.5 plus a fraction of 12.5. What is the fraction? HELP. THANK YOU!! I would do this. 13.75 - 12.5 = 1.25 difference. 1.25 is 1-1/4 (one and one-fourth) and that is the same as 5/4. So 13.75 = 12.5 + 5/4. Check this out. 6=7\3=14
*August 23, 2006*

**orientalism of muslim and arab american**

Hahahahahahahahhaha, UOP. Me too.
*August 6, 2006*

**business and economics**

any one know the definition of: inelastic supply? core concepts? contestable? timebased pricing?
*June 30, 2006*

**critical thinking**

does anyone know where i can find the defintions of principles! http://www.onelook.com/?w=principle&ls=a the defintion of they're
*June 28, 2006*

**math logic correction !!**

What comes next in the sequence? st, nd, rd, th, __, __. Sorry about typos in previous question. th, th These are the two-letter endings to "ordinal" numbers, starting with the "first". See http://www.janbrett.com/piggybacks/ordinal.htm Thanks for your ...
*September 4, 2005*

**math logic??**

What cones nest in the sequence? st,nd,rd,th,___, ____. See my answer to the same question, which you posted twice.
*September 4, 2005*