Sunday
March 29, 2015

Posts by tiffany


Total # Posts: 832

Chemistry
1. Iron oxide and carbon monoxide react according to the following equation . Identify which reactant is limiting and which is excess if 43.5 grams of Fe2O3 reacts with 43.5 grams of CO Fe2O3 + 3CO2 --> 3CO2 + 2Fe 2. Calculate the percent yield of Carbon dioxide if 20.0 ...
March 19, 2015

Chemistry
What is the empirical formula for a compound that is 1.67g Ce and 4.54g I?
March 12, 2015

Math
Hello! I need help with this question. I know that I'm using the Law of Sines, but I'm confused on how to solve. I have to also round my answers to the nearest tenth for degrees and to the nearest hundredth for sides. Thanks! Given: A = 60 degrees a = 9 c = 10 Find: b...
February 24, 2015

Math
@ms sue?
February 18, 2015

Math
The function f(x) = x^2 -2x + x^1/2 is: A. A polynomial because it is continuous. B. A polynomial because it is of the form axn. C. Not a polynomial because you are subtracting 2x. D. Not a polynomial because you can’t have any fractional exponents. Is the answer D?
February 18, 2015

Physics 202
A rail gun uses electromagnetic forces to accelerate a projectile to very high velocities. The basic mechanism of acceleration is relatively simple and can be illustrated in the following example. A metal rod of mass 10.0g and electrical resistance 0.100Ω rests on ...
February 17, 2015

Physics
Sound of a certain wavelength is coming from within a room and passing through a rectangular door (a "slit"). If the width of the doorway is twice the wavelength of the sound, what is the diffraction angle è of the sound leaving the doorway? Please show me how...
February 17, 2015

Math
if 12 ft of ribbon is cut into pieces that are 2 1/4 ft long,how much ribbon is left over?
February 17, 2015

Algebra 1
On the second line where you put 3x^2+3x+1x+1 it should really be 3x^2-3x-1x+1 You just lost track of your negative
February 16, 2015

Algebra
x= -2 y= -6
February 16, 2015

Math
If w is some number between 3 and 10, which of the following could be the average of the numbers 4,5,6,7,9 and w? (A)4.6 (B)5.1 (C)6.3 (D)7.9 (E)8.2
January 18, 2015

Physics
The earth has about 80 times the mass of the earth’s moon. The gravitational force exerted on the moon by the earth has what relation to the gravitational force exerted on the earth by the moon? 1. the same as 2. zero; the earth exerts a force on the moon,but the moon is ...
January 18, 2015

math
A piece of wire 34 cm long is cut into two parts. One part is to twice as long as other. how long is each part? solution pls..
January 13, 2015

math
May takes 12 hours to type a report. Her friend helps her and together they finish the job in 4 hours. How long would it take her friend had she worked alone? Representation: Equation: Solution: Conclusion:
January 12, 2015

computers
Wendy calls the help desk and reports that she is unable to access her files that are stored on the server. The network is a Windows Domain with Active Directory. Wendy is logged on locally to her workstation that runs Windows 8. You remote into her machine and you can ping ...
December 23, 2014

english 10th
How does an open question differ from a closed question?
December 16, 2014

intro to computers
You call the help desk to report a problem you are having on your computer. The technician asks you what operating system you are running. You know it is Windows 7 but you forget which version. How can you find out?
December 7, 2014

Math
Is it 168?
November 18, 2014

Math
Mr. Sugar baked a sheet cake in the shape of a rectangular prism with the deminisions of 20in by 12in by 3in high he is going to spread icing all over the cake except for the bottom what is the total surface area?
November 18, 2014

soc120
Which of the following is a claim that utilitarian might use to argue that prayer should not be allowed in school? (Points : 1)
November 4, 2014

chemistry - DrBob?
Hi! Can you tell me if I chose the right options for my chemistry homework? My answers are at the bottom. 1. Electrostatic interaction is important for which type of bond? A. ionic bond B. triple covalent bond C. single covalent bond D. double covalent bond 2. When an atom ...
November 2, 2014

Chemistry
Hi! Can you tell me if I chose the right options for my chemistry homework? My answers are at the bottom. 1. Electrostatic interaction is important for which type of bond? A. ionic bond B. triple covalent bond C. single covalent bond D. double covalent bond 2. When an atom ...
November 2, 2014

math
what is the consecutive positive odd numbers of 34,459,425?
October 27, 2014

English
yes
October 26, 2014

Chemistry
1. The temperature of two substances with the same mass increases by 20 degrees Celsius. Which absorbs the most energy, the substance with the higher or lower specific heat? Explain 2. The human body is approximately 60% water. Explain how this high percentage of water helps ...
October 21, 2014

math
the number 34,459,425 is the product of several consecutive positive odd numbers. what is the greatest of these numbers?
October 18, 2014

Chemistry
If 14.23 mL of 0.203 M NaOH is required to neutralize .269 g of a monoprotic unknown acid, what is the molecular weight of the unknown acid?
October 9, 2014

Math Help Please
ABC Company is about 1614 feet tall. How long would it take an object falling freely from the top to reach the ground? Use a = 16t^2 I would appreciate any help. ^_^
September 22, 2014

Pre-Calculus
Hi! I'm having trouble with this math question; can someone help? Thanks! :) Given the function f(x)=x^2+9, solve. a.) Find f(-3) b.) Find f(x-2)
September 16, 2014

English
What is the relationship between literature and place in these narratives "from A Journey Through Texas" and "form of Plymouth plantation"
September 15, 2014

Geometry
M is the midpoint of LM LM=3x+5 LN=5x+40 Find MN I've tried to work this out several times and am pretty sure I start it off by 3x+5=5(x)+40 but I keep getting a negative answer or a fraction for X and know that is not right. Can someone please help me?
September 11, 2014

Please check my answers ASAP
after i pass this test ill give u the anwers
August 29, 2014

Algebra
If you are paid a weekly base salary of $200 plus an hourly wage of $5.00, determine an equation for finding your weekly gross pay (P) for t hours. Specify an amount between 25 and 50 hours worked for 1 week and determine your gross pay for that week.
August 14, 2014

English / Grammar
Please help me word this sentence correctly: At its zenith, the depression saw nearly 25 percent of all workers and 37 percent of all non-farm workers completely out of work. I'm trying to say that at the peak of the depression, that's how many people were out of work...
August 10, 2014

General Education
I said that I chose D above.
July 20, 2014

General Education
Only circus animals with a clean bill of health will perform in today’s exhibition. A monkey, a poodle, and a horse will perform in today’s exhibition. No circus animals with a clean bill of health were prescribed medications this week. If the statements above are ...
July 20, 2014

General Education
Memmie: The greater the population near a restaurant, the more potential customers it has and the greater chance its popularity will spread through word-of-mouth. O’Sullivans Restaurant just opened in the very densely populated town of Redville, so its chances for success...
July 20, 2014

General Education
Thank you very much!!
July 20, 2014

General Education
<11{2[3(02)26]}> Aron: The two double A batteries in my CD player are dead, so the CD player doesn’t work. My television remote control, which also uses two double A batteries, works fine. So if I move the two batteries from my television remote control to my CD ...
July 20, 2014

probability and statistics
Suppose every student in your class got a score of 85% on an exam. What are the mean and standard deviation of those exam scores without doing any calculations? I want to say the mean is 100 and the standard deviation is 1 but I don't know why. If all students scored 85% ...
June 17, 2014

Physics
Josh starts his sled at the top of a 3.0m high hill that has a constant slope of 25 degrees. After reaching the bottom, he slides across a horizontal patch of snow. The hill is frictionless but the coefficient of kinetic friction between his sled and the snow is .05. How far ...
June 16, 2014

Numer Theory
1+2+3+...+n=(1+n)+(2+(n-1))+(3+(n-2))+... =(1+n)+(1+n)+(1+n)+... How many copies of n+1 are in there in the second line? with n=6 and n=7
June 7, 2014

SCI 275
I just did this. Talk about asbestos !!!!!
May 15, 2014

psychology
Can someone give me an example of correlation and causation.
April 16, 2014

Chemistry
Thanks for your help. Sorry, I accidentally posted the question again without meaning to.
April 14, 2014

Chemistry
The problem is: Calculate the standard free-energy change for the following reaction at 25 degrees Celsius. 2Au^+3(aq) + 3Cr(s)-> 2Au(s) + 3Cr^+2(aq) I worked it out, getting half reaction: Au^3+ + 3e- -> Au; E = 1.498 Cr^3+ + 3e- -> Cr; E = -0.74 Ecell = 1.498 - (-0....
April 14, 2014

General Chemistry
Thanks for your help! I got it now. I messed up with second half reaction, it was supposed to be Cr^2+ + 2e- -> Cr; E = -0.91.
April 14, 2014

General Chemistry
The problem is: Calculate the standard free-energy change for the following reaction at 25 degrees Celsius. 2Au^+3(aq) + 3Cr(s)-> 2Au(s) + 3Cr^+2(aq) I worked it out, getting half reaction: Au^3+ + 3e- -> Au; E = 1.498 Cr^3+ + 3e- -> Cr; E = -0.74 Ecell = 1.498 - (-0....
April 14, 2014

economics
Do you feel there are any imbalances to our wage structure in our economy?
April 2, 2014

statistics
a resturant must choose 5 employees from 12 applicants. in how many ways can they do that?
March 17, 2014

statistics
a machine has 0.04 probability of producing a defective item. If it produces 6 items find: a. probability none is defective b. at least one is defective c. all are defective
March 17, 2014

statistics
a quiz had 6 questions, each with 4 possible answers (only one of which is correct). If you answer them at random, find the probability that all are correct and at least one is wrong.
March 17, 2014

Chemistry
Calculate the total heat energy needed to convert 110g of ice at -10°C to steam at 110°C..?
February 25, 2014

Research and Statistics
Explain how to accept and reject the null? How to identify the null and alternative hypothesis for t-tests in both statistical and experimental hypothesis?
February 9, 2014

Human Relations Part 1
C) Self-Confidence makes you seem more interesting to other people.
February 6, 2014

College Algebra
solve by the the substitution method 8x+9y=-39
February 2, 2014

Social Studies (History)
What changes in society occurred as a result of the Industrial Age?
January 21, 2014

5TH GRADE MATH PLEASE HELP
Draw an equation or function table. The cost of shipping mittens purchased online is $2 plus $6 for each of pair of mittens. What is the total cost of buying 5 pairs? P = pair of mittens. Can you please help me with this problem?
January 14, 2014

5th grade math
Draw an equation or function table. The cost of shipping mittens purchased online is $2 plus $6 for each of pair of mittens. What is the total cost of buying 5 pairs? P = pair of mittens. Can you please help me with this problem?
January 14, 2014

science... PLEASE HELP!
Within which group would all members show the greatest similarities: Phylum kingdom genus Or species?
January 13, 2014

Social studies (History)
What are three good questions to ask a student to see if they understand the Reconstruction era?
January 9, 2014

Business Math
What is the compound interest on the previous investment?
January 8, 2014

Math question
Thank you Ms.Sue
January 7, 2014

Math question
6yz?
January 7, 2014

Math question
y + 2y + 3z?
January 7, 2014

Math question
5x + 2(x + 6) 7x + 6 7x*2 + 12 7x + 12 7x (x+6)
January 7, 2014

Social Stydies (History)
Correction: How did the Civil War start the Reconstruction era?
January 7, 2014

Social Stydies (History)
What happened that started the creation of the Reconstruction era? I believe it was the Civil War, but I do not know if there was anymore situations that started it. And if not how did the Civil War start the War? Please help!
January 7, 2014

History
What are some positives and negatives results from the reconstruction era?
January 6, 2014

Social Studies (History)
What does it mean by "Uplift America's urban poor"?
December 17, 2013

Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Between y = x^2 − 4x + 1 and y = −x^2 + 4x − 5 for x in [0, 3] Please don&#...
December 16, 2013

Calculus
the answer wasn't correct and I tried to do it myself and it is not working
December 16, 2013

Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Enclosed by y = x and y = x^4
December 16, 2013

Calculus
Evaluate the integral. HINT [Use a shortcut or see Example 4.] 4 to 3 x/(3x^2-6)dx
December 16, 2013

Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. HINT [See Example 3.] Enclosed by y = x and y = x^4
December 15, 2013

Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. (Round your answer to three decimal places.) Between y = e^x and y = x for x in [1, 2]
December 11, 2013

Calculus
thank you so much
December 11, 2013

Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Enclosed by y = x^2 − 4x + 1 and y = −x^2 + 4x − 5
December 11, 2013

Calculus
Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Enclosed by y = x^2 − 4x + 1 and y = −x^2 + 4x − 5
December 11, 2013

Science
Which mineral property is the best way to tell the difference between each type of mineral?
December 3, 2013

Science
Which mineral property test is the best way to tell the difference between each type of mineral? Why? Mineral Properties are: -Luster -Color -Magnetism -Hardness -Streak -Cleavage There are other mineral properties like Odor and Taste.
December 3, 2013

Grade 8 Math
Oh, so all we need to do is make combinations, so that all the area adds up to 500m2. Thank you Steve and Aryan!
November 23, 2013

Computers (Internet)
Is this considered plagiarism? Original passage: A letter of thanks is a courteous acknowledgment of a gift or of something that was done for you. Another passage: A thank you note is a polite acknowledgment of a present or something nice someone did for you. Please also ...
November 20, 2013

math
integral problem 8^7dx=
November 20, 2013

statistics
David wants to rent an unfurnished apartment for next semester. He took a random sample of 9 apartments adversised in the local Halifax paper, and recorded the rental rates. The rents (in $ per month) were: 500 650 600 505 450 550 515 495 640 a) Find a 90% confidence interval ...
November 14, 2013

Computers (Internet)
What are 2 credible websites that has information with human evolution?
November 8, 2013

internet
What does, "How is the coverage on the subject?" mean?
November 6, 2013

Internet
What does it mean when a question says, "Has the article been peer reviewed?"
November 6, 2013

Health part 2
Go Ashworth
November 5, 2013

Computers (internet)
What steps would it take you take to discover if the article was accurate? Please list them in order.
November 5, 2013

Computers (internet)
How would you know whether a particular article from Wikipedia is accurate?
November 5, 2013

math
why couldn't the chicken find her egg
November 5, 2013

Computers (internet)
But what is the process if they have an argument/disagree whether or not the information should be included or not?
November 4, 2013

Computers (internet)
If there is some debate about whether a particular bit of information should or should not be included in an article, what is the process for deciding?
November 4, 2013

Computers (internet information)
Where does Wikipedia get its information?
November 4, 2013

Science
He said it measures mass. However, the question does not make sense for it to be mass. I said it was mass, but I have second thoughts of whether it could be grams that it is measuring.
November 4, 2013

Math
y = (x^2.7/9 + 7/x^2.7) (9x-1) dy/dx solve derivative and show work
October 22, 2013

Math
If I had the math problem: 2^4 x 3^9 ---- ---- 3^5 2^7 And I used the method of sorting the bases and subtracting the exponents. Would my answer be 2^-3 x 3^4?
October 21, 2013

chem 2
calculate kc for reaction I2 (g)+Cl2 (g)⇌2ICl(g )Kp=81.9 (at 298 K)
October 6, 2013

history
. Parliament passed the Coercive Acts, known in America as the Intolerable Acts, in response to A. Patrick Henry's Resolves. B. the Boston Tea Party. C. insults addressed to the customs commissioners. D. the Boston Massacre.
October 2, 2013

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