Sunday

April 20, 2014

April 20, 2014

Total # Posts: 787

**psychology**

Can someone give me an example of correlation and causation.

**Chemistry**

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

**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....

**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.

**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....

**economics**

Do you feel there are any imbalances to our wage structure in our economy?

**statistics**

a resturant must choose 5 employees from 12 applicants. in how many ways can they do that?

**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

**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.

**Chemistry **

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

**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?

**College Algebra **

solve by the the substitution method 8x+9y=-39

**Social Studies (History)**

What changes in society occurred as a result of the Industrial Age?

**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?

**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?

**science... PLEASE HELP!**

Within which group would all members show the greatest similarities: Phylum kingdom genus Or species?

**Social studies (History)**

What are three good questions to ask a student to see if they understand the Reconstruction era?

**Business Math**

What is the compound interest on the previous investment?

**Math question**

Thank you Ms.Sue

**Math question**

6yz?

**Math question**

y + 2y + 3z?

**Math question **

5x + 2(x + 6) 7x + 6 7x*2 + 12 7x + 12 7x (x+6)

**Social Stydies (History)**

Correction: How did the Civil War start the Reconstruction era?

**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!

**History**

What are some positives and negatives results from the reconstruction era?

**Social Studies (History)**

What does it mean by "Uplift America's urban poor"?

**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&#...

**Calculus**

the answer wasn't correct and I tried to do it myself and it is not working

**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

**Calculus**

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

**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

**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]

**Calculus**

thank you so much

**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

**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

**Science**

Which mineral property is the best way to tell the difference between each type of mineral?

**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.

**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!

**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 expla...

**math**

integral problem 8^7dx=

**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 ...

**Computers (Internet)**

What are 2 credible websites that has information with human evolution?

**internet**

What does, "How is the coverage on the subject?" mean?

**Internet**

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

**Health part 2**

Go Ashworth

**Computers (internet)**

What steps would it take you take to discover if the article was accurate? Please list them in order.

**Computers (internet)**

How would you know whether a particular article from Wikipedia is accurate?

**math**

why couldn't the chicken find her egg

**Computers (internet)**

But what is the process if they have an argument/disagree whether or not the information should be included or not?

**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?

**Computers (internet information)**

Where does Wikipedia get its information?

**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.

**Math**

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

**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?

**chem 2**

calculate kc for reaction I2 (g)+Cl2 (g)⇌2ICl(g )Kp=81.9 (at 298 K)

**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.

**Math**

mr blackwell tracks sales of ski equipment each week for a month. complete the table to determine which week had the highest percent of ski equipment sales.

**Math**

a group of friends went on a hiking trip. they planned to hike a total of 38 miles. they want to complete 25% of the hike by the end of the first day.

**Accounting**

Annual interest of 5% paid if balance exceeds 800, $7 monthly fee if account falls below minimum balance, average monthly balance $1,160, account falls below $800 during 5 months. What is the annual net cost of this checking account?

**Physics**

how long will it take a bobsled with a velocity of 6 meters a second o stop if it decelerates at a rate of 3 meters per second?

**math**

The cost of renting tuxes for the Choral Society's formal is $20 down, plus $80 per tux. Express the cost C as a function of x, the number of tuxedos rented.

**3 grade math**

8000 counters

**Science**

False

**Physics**

thank you, i was making sure i was correct before i responded back to steve. i thought the 2 represented half of 4s, which is the delay of the echo

**Physics**

An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel at 1530 m/s in seawater. Show that when the time delay of an echo to the ocean floor below is 4 s, the depth of the water is 3060 m. d=vt=1530ms x 2 =3060 not sure if i did it correct o...

**Physics**

In grandpa’s time automobiles were previously manufactured to be as rigid as possible, whereas autos are now designed to crumple upon impact. Why?

**Chemistry**

Need help identifying organic functional groups of Mifepristone's lewis structure.

**Chemistry**

An antacid contains 200mg of aluminum hydroxide and 200mg of magnesium hydroxide per capsule. a. How many moles of Al(OH)3 does each capsule contain? 2.56 x 10^-3 mol Al(OH)3 is that correct? b. What is the mass in milligrams of 0.0457 mole of magnesium hydroxide? 2.665 x 10^-...

**Chemistry**

If I have 1.93 x 10^-6 mole of chromium that would equal 100.35 mcg correct?

**Chemistry**

If I have 40mg of potassium, that would be how many moles of potassium? mols= grams/atomic number 0.04g/39.0983= .001023062 would equal 1.02 x 10^-3 correct? Did I do this problem correctly?

**calculus**

1.Ruth has 240 feet of fencing available to enclose a rectangular field. Express the area A of the rectangular field as a function x, where x is the length of the field. 2. For what value of x is the area largest? 3. What is the maximum area?

**Math**

If I had to report calculations precision to +/-1, 23.40-18.2= 5.2 948.75+62.45=1011.20 Would those answers be correct?

**Chemistry**

When one gram of gas, is burned, 55.5kJ of heat are released. How many pounds of methane gas must be burned to release 2.578 x 10^3kJ of heat?

**smith**

The Smiths want to buy a 9 ft. by 12 ft. carpet and center it in a 15 ft. by 20 ft. room. What is the area of the carpet?

**math**

What is the molarity of a 15%w/v HCl solution (GMW=36.46)?

**math**

give x has a poisson distribution with mean=1.6 what is the probability that x=9

**math**

sam burned a CD with 6 songs how many ways can Sam arrange songs on a CD

**math**

Suppose a third world country in the last five years is now expanding their Internet access. If they went from 2.5% of their citizens having access to the Internet to 7.5% now having access, calculate the following: a) How many percentage points did they increase in access? b)...

**Writing skills 1**

12. Sentence (i) has been shortened in sentence (ii) by using a(n) _______. (i) She likes a location that is in the sun. (ii) She likes a sunny location.

**computers**

why is payroll for employees and human resources listed as a co-number 11 business priority

**Calculus**

The limits are 0,3

**Calculus**

It is y^(2/3) - we have not gone over shell method yet so.....

**Calculus**

Find the volume using the shell method - about the x-axis x=y^2/3

**calculus**

Where does the 4/3 and 3/2 come from? Thank you

**calculus**

Find the volume of the solid generated by revolving the region about the given line. The region in the second quadrant bounded above by the curve y = 16 - x2, below by the x-axis, and on the right by the y-axis, about the line x = 1 I have gathered, that washer method is to be...

**exponential equation**

Solve the exponential equation e^x + e^-x = 6

**Physics**

The current in a 5.00mH inductor drops from 2.50A to zero in 5.ooms. What is the average emf induced in he inductor?

**Physics**

A battery with an emf of 7.9 V and internal resistance of 1.37 Ω is connected across a load resistor R.If the current in the circuit is 0.88 A, what is the value of R? Answer in units of Ω What power is dissipated in the internal resistance of the battery? Answer i...

**Physics**

If the emf of a battery is 23 V and a current of 66 A is measured when the battery is shorted, what is the internal resistance of the battery? Answer in units of Ω How would you set up the equation to solve?

**math**

An investor purchases 75 shares at 37.90 a share, holds the stock for 150 days, and then sells the stock for 41.20 a share. Find the annual interest rate earned. principal under 3000 3000-10,000 over 10,000 commission 32+1.8% of principal 56+1% of principal 106+0.5% of principal

**math**

George finds a company that charges 59 cnets per day for each 1000 borrowed. if he borrows 3000 for 60 days, what amount will he repay, and what annual interest rate will he pay the company?

**Math 75**

if you paid $120 to a loan company for the use of $2000 for 90 days, what annual rate of interest did they charge?

**math**

A woman 5ft 6in tall stands so that the tip of her shadow coincides with the tip of the shadow of a tall tree. The woman stands 18 ft from the tip of her shadow and 100 ft from the base of the tree. How tall is the tree?

**algebra**

what is 0.0446 rounded to the nearest hundredth of a percent

**Math**

How did you get that?

**Math**

factor the polynomials using whatever strategy seems appropriate. 12m^2n^2-8mn+1

**Help math calc**

Find the future value of $700 deposited at 3% for 9 years if the account pays simple interest and the account pays compounded annually? The future value of an account that pays simple interest is what?

**Math college **

Find the future value of $700 deposited at 3% for 7 years if the account pays simple interest and the account pays interest compounded annually

**Mth**

Find the slope of the line. 2x-4y=2

**Chemistry**

A solution contains 314 mg/L of Ca2 . What is the solution in nmol/m3?

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