Thursday

April 17, 2014

April 17, 2014

Post a New Question | Current Questions

**Algebra 2, not "12th grade"**

Assistance needed. Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.
*Sunday, November 22, 2009 at 1:21pm*

**12th grade math an**

6b=30 b=30/6 b=5
*Wednesday, November 18, 2009 at 9:02pm*

**12th grade English**

I need to write a one page response essay to the quote "you can no more win a war than you can an earthquake"..........please help! Not good at writing. Thank you
*Tuesday, November 17, 2009 at 6:17am*

**12th grade math an**

Multiply the left side of the equation. 7b - 42 = - 12 + b Subtract b and add 42 to both sides. 6b = 30 Can you do the rest?
*Tuesday, November 17, 2009 at 12:48am*

**Math, not "12th grade"**

Assistance needed. Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.
*Sunday, November 15, 2009 at 8:19am*

**12th grade Physics**

Hi, actually Bob, your answer is not 30 degrees, but 60 degrees. 30 degrees does not refer to the angle inside the triangle formed by the x and y components.
*Tuesday, November 10, 2009 at 12:59am*

**12th grade Trig**

secTheta=2 means cosTheta=1/2, which means that Theta is 60 degrees.
*Monday, November 9, 2009 at 5:07pm*

**12th grade Trig**

sec theta = 2, sin theta is less than 0. I'm not sure what to do? Please explain. Thank you.
*Monday, November 9, 2009 at 4:44pm*

**12th grade Politics**

United States is the only sizable industrialized country that does not have a socialist party as a major source of power. Why is this??? Can someone please give me some points or reasons??? Thank you!!
*Wednesday, November 4, 2009 at 10:47am*

**12th grade Physics**

Determine the x and y components if a dog walks to the park that is 24m, 30 degrees northwest. Please help i don't know how to go about solving this problem
*Wednesday, November 4, 2009 at 9:57am*

**12th grade Advanced Functions**

A generator produces electrical power, P, in watts, according to the function: P(R)= 120/ (0.4 + R)^2 where R is the resistance, in ohms. Determine the intervals on which the power is increasing.
*Sunday, October 25, 2009 at 7:50pm*

**12th grade Physics**

Force required to accelerate the car vertically = m * (v^2) = 1200 * (0.8^2) = 1200 * 0.64 This force will be equal to the tension on the rope.
*Saturday, October 24, 2009 at 1:13pm*

**12th grade Physics**

how much tension must a rope withstand if it is used to accelerate a 1200-kg car vertically upward at .80 m/s^2?
*Saturday, October 24, 2009 at 1:09pm*

**12th grade English**

Your subject is English.
*Monday, October 12, 2009 at 8:18pm*

**12th grade chemistry**

Adding an O would make a superoxide and I don't know of any instances in organic of RCOOOH molecules although they are known in inorganic (KO2, for example).
*Sunday, October 4, 2009 at 7:37pm*

**12th grade chemistry**

thanks DrBob ..I appreciate the help. I have tried many searches for the answer on the internet and felt the answer was no as I found nothing.I understand the idea of going to CO2 and H2O. I also don't think that just an O molecule can be added. Thanks again.
*Sunday, October 4, 2009 at 5:50pm*

**11th grade u.s. history**

can i ask one more question srry um do you know a political cartoon that goes with the 12th amendment and what does he mean how does one go about amending the constitution lol srry thats 2
*Monday, September 28, 2009 at 9:52pm*

**11th grade u.s. history**

So basically the 12th amendment is necessary cause it helps select both president and vice president So does it protect the 20th amendment or am i like way off
*Monday, September 28, 2009 at 9:23pm*

**11th grade u.s. history**

Have you seen this site? http://kids.yahoo.com/directory/Around-the-World/Countries/United-States/Government/U.S.-Constitution/Amendments/12th-Amendment
*Monday, September 28, 2009 at 8:49pm*

**12th grade**

This is an opinion question. Your teacher is looking for YOU to be able to express your opinion and then back it up with facts, details, etc. Let us know what you think.
*Saturday, September 26, 2009 at 11:10am*

**12th grade**

According to the social contract theory, the contract is
*Wednesday, September 16, 2009 at 12:22pm*

**12th grade A.P. Economics**

which of the following is the most essential for a market economy? 1.) functioning labor unions 2.) good government regulation 3.) active competition in the marketplace. 4.) responsible action by the business leaders. I think its choice no. 3, am i right?
*Sunday, September 13, 2009 at 6:10pm*

**12th grade government/economics**

can you desccribe the definition of economics in these letters as examples J,K,O,Q,X,Y
*Friday, September 11, 2009 at 7:31pm*

**12th grade LAW**

i can think of the examples for that one point, but i'm not sure what other points i can add in order to answer my question. i'm not exactly sure how laws can actually increase someones freedom.
*Thursday, September 10, 2009 at 10:36pm*

**12th grade A.P. Economics**

Compare the mixed economies of various nations along a continuum between centrally planned and free market systems.
*Saturday, September 5, 2009 at 9:40am*

**12th grade English**

how to compare the characters of gilgamesh and enkidu. who was the more heroic? why? begin with an explanations of what you consider heroic and see if it is similar to what is considered heroic in the story.
*Saturday, September 5, 2009 at 12:45am*

**3rd grade**

His birthday must be: 10, 12, 14, 16, 18, 20, or 22 It can't be the 10th because 1 + 0 = 1 It can't be the 12th because 1 + 2 = 3 Let's see if she can figure this problem out from here.
*Wednesday, August 26, 2009 at 7:57pm*

**12th grade expository writing**

Can somebody help me with writing?
*Thursday, August 20, 2009 at 1:13pm*

**12th grade history**

Which groups of people were not afforded all the rights stated in the bill of rights?
*Thursday, August 13, 2009 at 6:12pm*

**12th grade AP Economics**

Why might an economist look at the hundreds of cars moving along an assembly line an say, “ There is an example of scarcity”?
*Thursday, August 6, 2009 at 2:15pm*

**12th grade**

"I am interested" IN WHAT? What is your education? What does the job require? What is your experience? Each of these topics require a paragraph. Post your letter, and we'll be glad to comment.
*Sunday, July 26, 2009 at 6:54pm*

**12th grade**

the voting right act of 1965 specially removed from voting in the U.S.
*Wednesday, July 15, 2009 at 5:10pm*

**12th grade**

which does suzuki in "hidden lessons" explore more thoroughly, the causes of children's negative or positive attitudes toward nature or the effects of these attitudes?
*Tuesday, July 14, 2009 at 12:06am*

**12th grade English**

How does Saki in "The image of the lost soul" use descriptions of places to reach desired effect in story? Can anyone tell me how? an example form the text would be helpful
*Thursday, July 2, 2009 at 11:50am*

**12th grade AP Economics**

I'd spend more money ($50? $100?) per trip if I knew the air traffic controllers were competent and not tired.
*Wednesday, July 1, 2009 at 6:26pm*

**12th grade AP Economics**

Ms. Sue, Thank you so much for the response. But I still don't get what I should be writing. Can you please mention one example? Sorry for the trouble! Thank you
*Wednesday, July 1, 2009 at 6:18pm*

**12th grade AP Economics**

Making a list of what you would consider the most important trade-offs of spending more money on air-travel safety. Can someone please help me!!!
*Wednesday, July 1, 2009 at 4:10pm*

**12th grade**

Penn Foster Examination #93051 Cooking Appliances I've gotten 16 out of 25 completed but I'll just post the whole exam to make sure I have THOSE right. Thanks for your help guys!
*Saturday, May 23, 2009 at 4:13pm*

**12th grade- Trigonometry**

Find the exact value of each expression Cos^-1(0) Tan^-1 sqrt(3)/3 Sin^-1(1) Since the expressions are capitalized, I'm not sure if I have to do anything different. Any help is appreciated.
*Thursday, May 14, 2009 at 9:04pm*

**12th grade chemistry**

Also, you are not adding up the molarity of the compound. Molarity is numer of moles of solute per liter of solution.
*Friday, May 1, 2009 at 1:22am*

**12th grade**

Are you sure you wrote the question correctly? I do not understand how g which is a function of x is written as a function of t, and especially with the dt.
*Thursday, April 23, 2009 at 10:34pm*

**Math, not "12th grade"**

assistance needed Please type your subject in the School Subject box. Any other words are likely to delay responses from a teacher who knows that subject well.
*Thursday, April 23, 2009 at 7:43am*

**12th grade**

Please put the class in the subject area and please complete your question.
*Monday, April 20, 2009 at 10:31am*

**12th grade, Economics**

After you have done some reading and answered the question, please repost and we will be happy to make any corrections/suggestions if needed.
*Thursday, April 16, 2009 at 4:11pm*

**12th grade math**

This seems to me a poor way to teach math.
*Saturday, April 11, 2009 at 7:57am*

**12th grade chemistry**

Calculate the number of grams in the following :[149.096 g/mole] 8.55 moles of (NH4)3PO4 IT WOULD BE NICE IF I CAN GET STEP BY STEPS TO GET ANSWER !!!
*Monday, March 30, 2009 at 6:32pm*

**12th grade**

Balance the reaction first. Then, figure the moles of Al in 100 g of Al. Now, use the mole relationships to figure themoles of Cu. We will be happy to critique your thinking.
*Monday, February 23, 2009 at 2:37pm*

**12th grade Data**

In this sequence, tk is a factorial number, often written k!. Show that tk=k!=k(k-1)(k-2)...(3)(2)(1)
*Monday, February 23, 2009 at 12:43pm*

**12th grade (chemistry)**

I think one of your reactants is wrong. It would have to be potassium hydroxide H2SO4 + 2 KOH -> K2SO4 + 2 H2O
*Tuesday, February 17, 2009 at 12:14am*

**12th grade**

Write the chemical equation for Sulfiric Acid and potassisum sulfate the product is potassium sulfate and water.
*Monday, February 16, 2009 at 10:55pm*

**12th grade**

List 3 problems of Decentralized power that existed under the Articles of Confederation. For each problem, identify one solution that the Constitution provided to address the problem.
*Thursday, February 5, 2009 at 9:54pm*

**12th grade bio**

The transition of the lips where the outer skinner and inner mucous membrane meet is called the _________ I looked it up and from what I read I believe it is the gingivae. Would that be correct. Thank you
*Thursday, February 5, 2009 at 2:10pm*

**12th grade Chemistry**

The total volume of the mixture is: 5 + 3 + 3 = 11 mls = 0.011 L I used 0.010 L by mistake. It should be replaced by 0.011 L. This will case a small change in the concentrations of Fe+3 and SCN-
*Sunday, January 11, 2009 at 8:40pm*

**12th grade**

not basically 20, it is 20. Units were not specified.
*Tuesday, January 6, 2009 at 9:36pm*

**12th grade**

I assume you are in calculus. Postition=INTEGRAL v(t) dt=INT (2t+1)dt = t^2 + t Put in t=4 and compute.
*Tuesday, January 6, 2009 at 9:31pm*

**12th grade Subject??**

What is your subject?
*Tuesday, January 6, 2009 at 9:30pm*

**12th grade**

A particle starts at x=0 and moves along the x-axis with velocity v(t)=2t+1 for time t is less than or equal to 0. Where is the particle at t=4?
*Tuesday, January 6, 2009 at 9:28pm*

**12th grade history**

Some of the clergy was corrupt and illiterate. By improving the clergy, the Church hoped to improve the whole organization.
*Wednesday, December 17, 2008 at 10:02pm*

**12th grade history**

Why did the Roman Catholic reform leaders believe that the fundamental aspect of improving the Church was to enhance the performance of the clergy?
*Wednesday, December 17, 2008 at 10:00pm*

**12th grade (Law)**

Could you tell me some information about NATO? I have to do a project for my law course and need to know how it impacts the world.
*Monday, December 15, 2008 at 9:18pm*

**12th grade chem**

In this case, they are different ways of writing the same thing. The more coventional way is H3PO3 (phosphoruus acid)
*Friday, December 12, 2008 at 12:29pm*

**12th grade chemistry!!**

Metal ions lose electrons to form cations, nonmetal ions gain electron to form anions.
*Sunday, December 7, 2008 at 12:05pm*

**12th grade IPT**

i need to gather information about E-commerce and there are questions i don't get. such as, how is the communication system is used and discuss some situations in which the system is used?
*Friday, December 5, 2008 at 7:03pm*

**12th grade, English**

We do not do your homework for you. After you have finished reading and writing, please repost and we will be happy to give you further corrections or suggestions.
*Wednesday, December 3, 2008 at 3:14pm*

**12th grade science (food & nutrition)**

You can start by Googling vegetarianism. Study these sites, and follow any links and hints that might help you more.
*Sunday, November 23, 2008 at 7:52pm*

**12th grade science (food & nutrition)**

Were doing a class debate on vegetarianism and i'm supporting vegetarianism (pro side) and i need 10 question to ask the con side (against vegetarianism). Don't really know how to start.
*Sunday, November 23, 2008 at 7:48pm*

**12th grade government/economics**

should the u.s move to an electonic currency and remove paper currency
*Thursday, November 20, 2008 at 4:18pm*

**12th grade calculus**

a marathoner ran the 26.2-mi New York City marathon in 2.2h. show that at least twice, the marthoner was running at exactly 11 mph
*Thursday, November 6, 2008 at 8:06pm*

**12th grade calculus**

I will be happy to critique your thinking. Remember, you need to work on either side of x=3 here, and on either side of x=-3.
*Wednesday, November 5, 2008 at 12:08am*

**12th grade calculus**

Let f(x)=[x^3-9x] [] --- absolute value a. does f'(x) exist? b. does f'(3) exist? c. does f'(-3) exist? d. determine all extrema of f.
*Tuesday, November 4, 2008 at 11:22pm*

**12th grade Physics**

a car travels in a straight line for 3 h at a constant speed of 53 km/h. what is the acceraleration? answer in units of m/s2.
*Saturday, November 1, 2008 at 9:58pm*

**12th grade calculus**

find the lines that are tangent and normal to th ecurve at the point given 1. 2xy+piesiny=2pie (1, pie/2) 2. x^2cos^2y-siny=0 (0, pie)
*Sunday, October 19, 2008 at 9:06pm*

**12th grade calculus**

You did not state the given point. Using implicit derivative I found it to be y' = (2x+y)/(2y-x) sub in the given point, that gives you the slope of the tangent. Now that you have the slope (m) and a given point, use the grade 9 method of finding the equation of the ...
*Sunday, October 19, 2008 at 7:58pm*

**12th grade government/economics**

Amendments must be ratified by 3/4 of the states. Article IV has given Congress the option of requiring ratification by state legislatures or by special conventions assembled in the states.
*Sunday, October 19, 2008 at 7:19pm*

**12th grade Physics**

"If a skier coasts down a slope at an angle of 24 degrees below the horizontal, what is her acceleration if the force of friction is negligible?" I must have done this question 15 times, and still can't get the right anwser. Can anyone help me?
*Monday, October 13, 2008 at 4:30pm*

**12th grade Math?**

How would you factor 3x^3-4x^2+4x-1? P.S. Factor theorem does not work here.
*Sunday, October 12, 2008 at 11:48pm*

**12th grade Physics**

Please do not just "drop off" problems. Show your work. Do you know what "the normal force" means? It is the component of the applied force that is perpendicular to the ground. Start by calculating that.
*Sunday, October 12, 2008 at 3:06pm*

**12th grade Physics**

it changed velocity from 88West to zero, in a given time. acceleration= (finalveloicty-initialveloicty)/time I assume you realize what negative West means.
*Tuesday, October 7, 2008 at 6:52pm*

**12th grade Physics**

In an experiment, a car taveling at 88m/s,west slams into a wall and comes to a halt in 0.75 seconds. What is the car's acceleration vector?
*Tuesday, October 7, 2008 at 6:45pm*

**12th grade Physics**

who was the father of physics
*Saturday, October 4, 2008 at 12:37am*

**12th grade**

Think of a business in your local area. Describe its operation in terms of factor markets and product markets.
*Sunday, September 21, 2008 at 2:34pm*

**12th grade**

If f(x)= 1/1-x Find the composition of f(f(x)). So I get 1/1-(1/1-x) I'm not sure if I am putting it in my calculator correctly because I keep getting a line. Is that right? If I put it in with the parentheses differently, I get the graph of f(x)=1/x. Does anyone know ...
*Thursday, September 18, 2008 at 5:18pm*

**12th grade Science**

A bud covers the bloom but when it erupts it holds up the flower from underneath find the name it’s divided into together and alone? -thanks-
*Wednesday, September 10, 2008 at 4:03pm*

**12th grade**

Given that x is an inetger, state the relation representing each equation by making a table of values. y=3x+5 and -4<x<4
*Wednesday, September 3, 2008 at 9:25pm*

**12th grade**

Why is it difficult to recognize the worth and dignity of all individuals at all times?
*Wednesday, September 3, 2008 at 5:33pm*

**12th grade math help!!!!**

The height of the right triangle is 9 units, and the area is 54 sq. units. how long is the base of the triangle?
*Tuesday, August 26, 2008 at 2:46pm*

**12th grade math help!!!!**

if (x,y) are the coordinates of a point p in the xy plane then x is called _______ of p and the _______ of p
*Tuesday, August 26, 2008 at 2:00am*

**12th grade government/economics**

If no candiate for the presidency wins a simple majority of the total number of electoral votes, what body has the power to choose the president?
*Sunday, August 24, 2008 at 10:23pm*

**10th grade math**

1.548937075 x 10 to the 12th. round the number to 3 significat figures. I thought I would respost this because the other one was getting confusing
*Tuesday, August 19, 2008 at 8:56pm*

**12th grade math help!!!!**

I fail to see how that relates to math
*Friday, March 28, 2008 at 1:08pm*

**Math - PreCalc (12th Grade)**

Which rectangular equation corresponds to these parametric equations? x = 0.2sec t and y = -0.25tan t A) 25x^2 − 16y^2 = 1 B) 25x^2 + 16y^2 = 1 C) x^2 − 16y^2 = 25 D) 25y^2 − 16x^2 = 1 E) 4x^2 − 16x^2 = 1
*Monday, March 24, 2014 at 10:24am*

**Math - PreCalc (12th Grade)**

If the distance covered by an object in time t is given by s(t) = 2t2 + 3t, where s(t) is in meters and t is in seconds, what is the average velocity over the interval from 2 seconds to 4 seconds? A) 15 meters/second B) 14 meters/second C) 13 meters/second D) 12 meters/second ...
*Friday, March 21, 2014 at 12:01pm*

**Math - PreCalc (12th Grade)**

spread = 5-2 = 3 if cut into n pieces, each base = 3/n endpoint of 1st rectangle = 2 + 3/n endpoint of 2nd rectangle = 2 + 2(3/n) ... endpoint of kth rectangle = 2 + k(3/n) = 2 + 3k/n f(2+3k/n) = 2(2 + 3k/n) + 1 = 5 +6k/2 I see you have two other questions above that follow ...
*Friday, March 21, 2014 at 11:40am*

**Math - PreCalc (12th Grade)**

Which statement about a uniform probability distribution defined on a given interval is true? A) The mean is always 0. B) The mean is always 1. C) The standard deviation is always 1. D) The mean is the midpoint of the interval. E) The standard deviation is equal to the width ...
*Friday, March 21, 2014 at 11:05am*

**Math - PreCalc (12th Grade)**

The function f(x) = 2x + 1 is defined over the interval [2, 5]. If the interval is divided into n equal parts, what is the value of the function at the right endpoint of the kth rectangle? A) 2+3k/n B) 4+3k/n C) 4+6k/n D) 5+6k/n E) 5+3k/n
*Friday, March 21, 2014 at 9:57am*

**Math - PreCalc (12th Grade)**

ok so far, though they already told you that f(2)=3 because the point (2,3) is on the graph. As you know, the slope at any point (x,y) on the graph is 2x+2 So, the slope at x=2 is 6 Though, if this is pre-calc, how do you know the slope of the tangent to a curve? That's ...
*Thursday, March 20, 2014 at 1:21pm*

**Math - PreCalc (12th Grade)**

as with any arithmetic progression, Sk = k/2(a1 + ak) = k/2(1+5k-4) = k/2(5k-3) Sk+ak+1 = k(5k-3)/2 + 5k-4+1 (D) Don't forget your algebra I just because you're in pre-calc now.
*Thursday, March 20, 2014 at 1:19pm*

**Math - PreCalc (12th Grade)**

If Sn = 1 + 6 + 11 + 16 + 21 + 26...... where an = (5n − 4), what would be the mathematical expression represented by Sk + ak + 1? A) (k(5k − 3)/2)+ 5k + 1 B) (k(5k − 3)/2)+ 5k − 4 C) (k(5k − 3)/2)+ 5k + 2 D) (k(5k − 3)/2)+ 5k − 3 E) (...
*Thursday, March 20, 2014 at 1:05pm*

**Math - PreCalc (12th Grade)**

What value must be defined for f(4) to remove the discontinuity of this function at x=4? f(x)=(x^2−16)/(x−4) A) 0 B) 4 C) -4 D) 8 E) -8 f(4)=(4^2−16)/(4−4) f(4)=0/0 you can't divide by zero. I don't understand the question.
*Thursday, March 20, 2014 at 12:38pm*

**Math - PreCalc (12th Grade)**

If Sn represents the sum of the squares of the first n natural numbers, use proof by induction to find which of the following expressions for Sn is true? A) Sn = n(n − 1)/3 B) Sn = n(2n − 1)/3 C) Sn = n(n + 1)/3 D) Sn = n(n + 1)(2n + 1)/3
*Thursday, March 20, 2014 at 12:23pm*

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