Friday
April 18, 2014

Posts by liz


Total # Posts: 992

psychology
how effective is classical conditioning in the long tem

economics
Why might management and economic theories not always work in the real world?

economics
A copy company wants to expand production. It currently has 20 workers who share eight copiers. Two months ago, the firm added two copiers, and output increased by 100,000 pages per day. One month ago, they added five workers, and productivity also increased by 50,000 pages pe...

Math
Joe drank 4 liters of water on Monday and 4 deciliters of water on Tuesday. How much more water did he drink on Monday than on Tuesday?

Calculus
Find if the limit exists. lim tan(x)/x x->0 Please show how you determined this. Thanks!

Calculus
Find an equation of the line that is tangent to the graph of f and parallel to the given line. Funtion: f(x)=1/sqrt(x-1) Line: x+2y+7=0

Calculus
**Note** Please use the Epsilon-Delta Definition.

Calculus
I have two similar problems that I need help completing. Please show all your work. Question: Find the limit L. Then use the å-ä definition to prove the limit is L. 1. lim (2x+5) x->3 2. lim 3 x->6 Thank you for your anticipated help!!

Algrebra 1
What are the practical uses of scientific notation? Why is scientific notation so important in modern-day society?

english
They are going to the park and play or they are going to the park to play. Which one is correct.

english
There are never enough discipline on the playground: someone always is getting hurt. Subject verb agreement.

Grammar
Everything looks good except #3, it is supposed to be Was.

reading
You don't want to put your the title of the essay in the introduction. An introduction has to have a grabber, thesis statment and also an idea of what we'll be reading. Sometimes that idea is part of th egrabber and that makes it stronger. People would want to read it....

reading
It looks like there are supposed to be choices. maybe if you put the choices down we'll help.

Chemistry (1Question)
This is really confusing. I know how to do the equilibrium which also has to do with reaction rates but they didb't give it to me as a choice. Please Please help me. I post other questions that i answered already but no one answered me. I just needed someone to check them ...

To DrBob222(Please check Chem)
#4 is the last choice for sure. I googled exothermics and i even found examples. #'s 12 and 14 look wrong to me also but those are the only choices i got.

To DrBob222(Please check Chem)
(This homework question has been removed due to a copyright claim submitted by K12 Inc.)

Algebra(please help)
Will someone please help me withthis question I couldn't solve it. What is the length of the segment whose endpoints are A(2, 3) and B(10, 7)? a)2 Sqrroot29 b)2 Sqrroot41 c)4 Sqrroot2 d)2 Sqrroot5

Calculus
Find the volume of the solid generated by the region in the first quadrant bounded above by the 3x+y=6, below by the x-axis, and on the left by the y-axis, about the line x= -2.

chemistry
The data in the table show the amount of a 500 g sample of sodium-24 over time. Make a graph of the data (remember to label all axes and title the graph). What is the half-life of sodium-24? Explain how you determined your answer. Sodium-24 decays by beta emission. Write a nuc...

English (quick Sentence)
Thanks. I forgot the comma ansd i used tha present tense when it is supposed to be the past tense.

English (quick Sentence)
Hi Teachers, I wrote a sentence in which i think has a wrong sentence structure. Will you correct me with it, please? When his daughter told us of what he said we promised that we will all be in part of helping him and making him feel like family.

Comm 215
Part1 looks good to me. I have to go:( I hope you get help with the rest.

English
It would be at the end of the cited work.

English (Check Please)
Hi Teachers, will you please check my answers? The arrows indicate my answers. Am I right? 1. The speaker’s use of many exclamation points and imperative statements in “Beat! Beat! Drums!” helps readers feel the tone’s humor. urgency. <--- quiet calm. hi...

English
Type this question in bing and when the results come up it is the first one. very helpful paper, trust me! Where would i put a parenthetical citation for a work that needs to be credited? This is what you should press on. Parenthetical (in-text) Documentation (citation)

English (Check)
Thank you again Ms. Sue.

English (Check)
Thank you so much for your help Ms. Sue. I had already told my sister that i think it is abundance and energy because in thos lines it talks about the coolness and sweetness of Ohio. It also talks about the flutering leaves in a moderate wind. She thought i was wrong. Thank yo...

English (Check)
Would it be suffering and loss? I'm just confused by this question.

English (Check)
I'm sorry i forgot to tell you that the arrows means indicate my answers. Am i correct?

English (Check)
Hi Teachers, will you please check my answers? 1. The speaker’s use of many exclamation points and imperative statements in “Beat! Beat! Drums!” helps readers feel the tone’s humor. urgency. <--- quiet calm. high spirits. 2. With what kind of life are th...

Religion
Hi Rebecca, I am a Muslim and Islam promotes peace. May i ask, what made you ask this question?

Calculus
Find the volume of the solid of revolution by roating the region R about the y-axis. Write the answer as a multiple of pi. y= sqrt(x), y=x^2, in the first Quadrant

Chemistry
In a calorimeter, 100 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed? 33.4 J 334 J 33.4 kJ 334 kJ

English ASAP
I have to choose the sentence that has no error in italics. (Italicized) a)Their lawyers are handling the case pro bono and not charging them a dime. b)Yes, of course you can use (and) instead of a comma here. c)Oh, I see the problem; this (three) should be an (eight) <-- I...

chemistry
a student determines the molar mass of methanol by the method used in this experiment. she found that the equilibrium temperature of a mixture of ice and pure water was .4 degrees Celsius on her thermometer. when she added 10g of her sample to the mixture, the temperature, aft...

Calculus
A container is in the shape of an inverted right circular cone has a radius of 2 in at the top and a height of 6 in. At the instant when the water in the conatiner is 5 in deep, the surface level is falling at the rate of -.4 in/s. Find the rate at which the water is being dra...

Calculus
Find the third Derivative of f(x)=x(3x-7)^3 The answer is 3x-1134 but I attempted the problem multiple times and I keep ending up with 648x-1134. What am I doing wrong?

Algebra2 {ASAP}
Hi helper, I used permutation for the following question. How can i use combination to find the answer? Help me please! There are 12 red checkers and 3 black checkers in a bag. Checkers are selected one at a time, with replacement. Each time, the color of the checker is record...

social studies 9
Wouldn't this be reading or Literature? I think that Dickens gave him his name because he looks a bit chubby and is short. More like a bumble bee with a fat stomach. It is just a good guess and that is how i visulized him whem i read Oliver Twist by Charles Dickens.

Algebra
thank you! u r awesome... I wasnt too sure.. again thank you!

Algebra
Use the formula d=rt to find the value of the missing variable d=42 feet, t=14 seconds then r= ft. second

MAT 116 (algebra)
Please help not understanding this question. If the cost of a cell phone has decreased 400% during the past 10 years, does that correspond to a cost decrease of four times? Make up your own numbers in an example and then explain your answer as though you were talking to someon...

8 th grade
Good job.

English
The styles are different. The “ Theme for English B” is a free style and the “Ballad of Birmingham' has rhythm. The rhythm he uses is ABCB, ABCB and so on. The themes for both the “Theme for English B” and “Ballad of Birmingham” are civil...

English
Well i understand that the style for “Theme for English B" is a free style. I don't know what style a “Ballad of Birmingham” uses. I know that it is something like ABCB but i don't know what the name is for it. I'm thinking that the theme for bo...

English
How do the styles and themes of “Theme for English B” and “Ballad of Birmingham” compare? Answer this question in at least a paragraph and make sure to cite examples from the text. Answer:

chemistry
Given the consentration of either hrgrogen ion or hydroxide ion, use the product constant of water to calculate the consentration of the other ion at 298 K. A: [H+]=1.0x10^-4M B: [OH-]= 1.3x10^-11M

Chemistry
If a total of 13.5 mol of NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of CO2 and Na3C6H5O7 will be produced? 3NaHCO3(aq) + C6H8O7(aq) > 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq)

Calculus
The strength of a beam with rectangular corss-section is directly proportional to the product of the width and the square of the depth (thickness from the top to bottom of the beam). Find the shape of the strongest beam that can be cut from a cylindrical log of diameter d= 3 ft

Physics
Thank you!!

Physics
The total charge in an electrical circuit as a function of time is given by q=t/t^2+1 coulombs. Find the maximum charge q. Please provide your reasoning.

Algebra 1
3x + 4y = -2 and 2x - 3y = 10

chemistry
Calculate the pH of a 2.5x10-5 M lithium hydroxide solution.

Chemistry-Help
An AM radio station broadcasts at 1060 kHz. Calculate the wavelength of the corresponding radio waves. How do I calculate this?

Algebra
3. There are 12 red checkers and 3 black checkers in a bag. Checkers are selected one at a time, with replacement. Each time, the color of the checker is recorded. Find the probability of selecting a red checker exactly 7 times in 10 selections. Show your work. Help! I'm h...

chemistry
1.16 x 10^22 sulfur atoms

chemistry
73.7g

chemistry
how many sulfur atoms are in 2.57 g of iron (III) sulfate?

chemistry
how many grams of magnesium carbonate are in a sample that has 1.58 x 10^24 oxygen atoms?

AP Chemistry
What is the pH of a .20M HA solution (Ka=1.0x10^-6) that contains a 0.40M NaA?

chemistry
What would the pressure be if h3 po4 was vaporized in a 20L container at a temperature of 23.5 degrees Celsius?? ( gas law)

Math
oops I meant length of AB

Math
An electric circuit has equally spaced parallel wire with connections A, B, and C. If the length of AP = 3.42 cm, what is the length of BC?

Calculus
Please help!! I keep solving this problem but I keep getting the wrong answer. Find the derivative of the function: f(x)= xsqrt(x-1)/(x+2)

Calculus
A electric circuit board has equally spaced parallel wires with connections at points A, B, C. If the length of AB=3.42 cm, what is the length of BC?

Native American Studies
OR d) All of the answers are correct

Native American Studies
a) Using a sacred site to store toxic waste b) Barring development on a sacred site c) Passing federal legislation to return sacred sites to Native American control All of the answers are correct

Native American Studies
Which of the practices listed is an example of an activity Native American people might regard as an act of desecration?

Calculus
Please help!! Differentiate: y=(x^2-1)^(1/2)/x^2

Calculus
Please Help! I tried doing this on my own and got the wrong answer. Differentiate: y=4/(x-x^2)^(1/4)

math
if 11% of the population is left handed, what is the porbability that as least one of the first 20 strangers you meet is left handed

math (integers)
What interval would you use on a line graph that's range is +13~+42?

physics
A baseball is tossed at a steep angle into the air and makes a smooth parabolic path. Its time in the air is t and it reaches a maximum height h. Assume that air resistance is negligible. a.) Show that the height reached by the ball is gt2 (square) /8. b.) If the ball is in th...

physics
A rock thrown horizontally from a bridge hits the water below at a horizontal distance x directly below the throwing point. The rock travels a smooth parabolic path in time t. A.) Show that Therapy vertical distance of the bridge above water is 1/2gr2. B.) What is the height o...

chemistry
Write the correct equation for the formation of a white precipitate on mixing together 10 mL each of 1 M calcium chloride, 1 M calcium bromide, 1 M calcium nitrate, 1 M sodium carbonate, 1 M potassium carbonate, and 1 M rubidium carbonate.

Chemistry
What is the number of bonding electrons and the number of nonbonding electrons in the structure of BeF2?

Chemistry
during a molar volume of oxygen experiment indicate how each of the following errors would affect (increase, decrease, or no change) your calculated value for the molar volume of O2 at STP. 1.) Your sample was not completely decomposed. 2.) After you finish heating sample & th...

Chemistry
1. As a research chimst, you are intrested in studying the extent and type of interactions in aqueous salt solution. As part of this study, you weight three samples of NaCl and dissolve each in 1.000kg H2O. You then measure the freezing temp. of each solution and compare these...

Chemistry
In our lab we had to experiment with an apparatus in order to find such things as the percent of KClO_3 in the solution.. Assume that you heated your sample too rapidly and some of the sample spattered onto the rubber stopper of the test tube. Will your calculated percent KClO...

math
so its 3456?

math
what is the volume of the stereo speaker 24inchs 12inches 12inches

geometry
Alec used 8 cubes to make this square frame that has 3 cubes on each side. If he uses 16 cubes to make a square frame, how many cubes will be on each side of the frame

Science
If a man has a mass of 90 kg on earth, what is his mass on the moon?

Algebra II
Simplify - 2/(the 6th root of 81)

algebra
Simplify - 2 / (the 6th root of 81)

Math-Are my answers correct?
Thank you very much:)

Math-Are my answers correct?
An anagram is a rearrangement of all the letters in a word. Example: page--->gape, pgea.. a) Find the number of 7 letter anagrams possible for the letters in GUITARS. I did 7!=5040...is that correct? b) Find the probability of randomly choosing an anagram that starts with T...

Math for the middle school and elementary teacher
Thank you very much for you help:)

Math for the middle school and elementary teacher
3 red balls, 4 green balls, and 5 yellow balls are in a bag. If 2 balls are drawn randomly (without replacement) find the probability that the balls are different colors. I got 47/66 that the balls are different colors...is that right?

math for the middle school and elementary teacher
Thank you! :)

math for the middle school and elementary teacher
No, so that a) is the correct answer because order matters in the line! I am correct, right? Thank you very much:)

math for the middle school and elementary teacher
They are not different but for a) the order doesn't matter for the way that the people can be lined up. But for b) order wouldn't matter either because there it doesn't matter who is on which team. Then c) there are no specifed posistions for the committee I'm ...

math for the middle school and elementary teacher
I think that the answer is d) the number of different fruit salads made by choosing four out of seven fruits because you can't have all of the same fruit in a fruit salad.

math for the middle school and elementary teacher
Which one of the following situations a permutation? a) the number of ways 10 people can be lined up in a line for basketball tickets. b) The number of possible four member bowling teams from a family of six siblings. c) The number of ways to choose a committee of three from a...

Math for the middle school and elementary teacher
The answer is 79, correct? Thank you for your guidance and help:)

Math for the middle school and elementary teacher
I don't think you can find the total score because you would need the individual scores, right? I tried dividing 82/25 but that wouldn't work because we don't have all the scores...am I on the right track if not, can i please have some guidance? thank you!

Math for the middle school and elementary teacher
A prof. teaches 2 calc. classes. The first class has 25 students and their mean on the 1st test was an 82. The 2nd class has 15 students and their mean on the same test was a 74. What is the mean on this test if the prof. combines the score for both classes? Is the answer the ...

Precalculus
The answer I got is 152.87 degrees/second.

Precalculus
A wheel rolling at a constant speed has a radius of 15 inches and takes 30 seconds to roll 100 feet along the ground. What is its angular velocity? Use 3.14 for pie, and solve to two decimal places.

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