Friday

November 28, 2014

November 28, 2014

Total # Posts: 2,165

**chemistry**

A scientist wants to make a solution of tribasic sodium phosphate, \rm Na_3PO_4, for a laboratory experiment. How many grams of \rm Na_3PO_4 will be needed to produce 575 mL of a solution that has a concentration of \rm Na^+ ions of 1.00 \it M?
*September 19, 2010*

**chemistry**

What mass of carbon dioxide is produced from the complete combustion of 8.20×10−3 g of methane?
*September 19, 2010*

**Statistics**

The average mpg usage for a 2004 Ford Expedition 2WD for a sample of 10 tanks of gas was 17.0with a standard deviation of 0.8. For a Ford Explorer 2WD, the average mpg usage for a sample of 10 tanks of gas was 18.5 with a standard deviation of 1.0. (a) Assuming equal variances...
*September 19, 2010*

**Statistics**

A survey of 100 mayonnaise purchasers showed that 65 were loyal to one brand. For 100 bath soap purchasers, only 53 were loyal to one brand. a) Perform a two-tailed test comparing the proportion of brand-loyal customers at á=.05.b) Form a confidence interval for the ...
*September 19, 2010*

**math**

sean is buying a player for $315. interest free payment plan. pays $25 each month. a. how much will he owe after 1 payment? 2 payments? 3 payments? b. use n to stand for the number of payments and a for the amount still owed. write an equation for calculating a for any value ...
*September 15, 2010*

**Algebra 2**

I've got some homework about ellipses and I am not sure if I am doing these right. So if you could check my answers I would appreciate it. Thanks!! 1.) Write an equation for an ellipse if the endpoints of the major axis are at (1,6) and (1,-6) and the endpoints of the ...
*September 14, 2010*

**economics**

10. 10. The amount of time an individual is willing to offer for a wage depends on the a) all of the following b) value of time devoted to leisure activities c) boredom, discomfort, and aggravation associated with work d) value of time devoted to nonmarket work e) satisfaction...
*September 14, 2010*

**statistics**

Use Excel to find the p-value for each test statistic.a. Right-tailed test, t = +1.677, n = 13 b. Left-tailed test, t = −2.107, n = 5 c. Two-tailed test,t = −1.865, n = 34
*September 13, 2010*

**statistics**

Find the p-value for each test statistic. a. Right-tailed test, z=+1.34 b. Left-tailed test, z=−2.07 c. Two-tailed test, z=−1.69
*September 13, 2010*

**science**

scientific notation 78,990
*September 12, 2010*

**english**

Using the chicago style manuel, how would you cite this in in-text citation. Smith doesn’t disagree. (In fact, he claims he figured this out himself!) Citation: Smith, 2008, p. 15 There needs to be a citation after the word disagree and at the end after the parenthesis. ...
*September 11, 2010*

**3rd grade**

writing in math mrs. bradner has 30 tomato plants. she wants to plant the same number of plants in each row of her gardner. explain how she could decide the number of rows to plants.
*September 9, 2010*

**calculus**

A point in the first quadrant lies on the parabola y = x^2. Express the coordinates of P as function of the angle of inclination of the line joining P to the origin
*September 8, 2010*

**algebra homework**

1 minus the sqrt of x by the power of 2. I need help with the steps of solving this. I forgot how to do it. Thakns in advance.
*September 5, 2010*

**math**

For the pair of numbers (-1/5),(-1/2) My teacher wants us to find the quadratic equation with integral coefficients that has these numbers as solutions. I am not sure if I have the right equation for this. Could someone let me know if I am right or wrong and then show me how ...
*September 3, 2010*

**math**

Could someone show me how to solve this problem? I am trying to do it myself.I just want to make sure I am going about it the right way. Thank you. z=(SQRTx^2+y^2) (9)^-3/2 (8)^2/3
*September 3, 2010*

**Chemistry **

What mass of pure aluminum can be dissolved by 13mL of 1.6M KOH?
*September 1, 2010*

**algebra**

I need help solving this problem. -6/z+8=-8/3z+24+7. Could some one help me out with this.
*September 1, 2010*

**algebra**

I just want to see if my answer for this problem is correct or not. The aswer I have is 3x^2-3/7x^3-3x^2-17x+6. I was just wondering.Can I factor my answer? 3x-3/7x-3*x+1/x^2-1
*August 31, 2010*

**science**

most of mali is arid. what kind of vegetation would you find there?
*August 31, 2010*

**english/Comm**

I need help in writing 5 sentences about the role of education in successful finacial planning and I need to use a verb tense in each sentence?
*August 28, 2010*

**algebra**

I am having trouble solving this complex fraction. Can you adise me hoe to work it out? The denominator I am using is 4. Is that right? 1/x - 3/2 ---------- 3/4 + 1/x
*August 27, 2010*

**statistic**

A lottery ticket has a grand prize of $28 million. The probability of winning the grand prize is .000000023. Based on the expected value of the lottery ticket, would you pay $1 for a ticket? Show your calculations and reasoning clearly.
*August 27, 2010*

**Statistic**

6.16 Calculate each binomial probability: a. X = 2, n = 8, ð = .10 b. X = 1, n = 10, ð = .40 c. X = 3, n = 12, ð = .70 d. X = 5, n = 9, ð = .90
*August 27, 2010*

**Statistic**

6.18 Calculate each binomial probability: a. Fewer than 4 successes in 12 trials with a 10 percent chance of success. b. At least 3 successes in 7 trials with a 40 percent chance of success. c. At most 9 successes in 14 trials with a 60 percent chance of success. d. More than ...
*August 27, 2010*

**social studies**

Compass rose
*August 25, 2010*

**cell biology**

draw the structure 1-palmitoyl-2-sn-glycero-3-phosphoinositol.using the drawing, illustrate the difference between saturated and unsaturated fatty acids 16:0 and 18:1, n-9
*August 3, 2010*

**general chemistry**

For a molecule with the formula AB2 the molecular shape is
*July 29, 2010*

**English**

Write five sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence
*July 22, 2010*

**math**

8x-(4x+4)=28 x=?
*July 20, 2010*

**algebra**

wow, forgot the term, sorry. 8x-(4x+4)=28
*July 20, 2010*

**algebra**

solve 8x(4x+4)=28 x=?
*July 20, 2010*

**math**

What is a function, in your own words?
*July 15, 2010*

**AP Chemistry 2**

which combination of electronic geometries: I. linear II. trigonal planar III. tetrahedral IV. trigonal bypyramidal V. octahedral include all of the molecular geometries with pyramidal structures? Options: 1. II, III, IV, and V. 2. III and IV 3. III, IV, and V. 4. IV. 5. IV and V
*July 14, 2010*

**AP Chemistry**

what is the molecular shape of OCCl2 ion? C is the central atom. Options: 1. seesaw 2. tetrahedral 3. trigonal pyramidal 4. trigonal planar 5. trigonal bypyramidal 6. octahedral
*July 14, 2010*

**pharmacy math**

the iv dose of mannitol is 1.5g/kg, administered as 15% solution. how many mls of the solution should be administered to a 150 pound patient.
*July 12, 2010*

**Recombinant DNA**

When you digest Vibrio DNA with Sal1, wh do you get mostly large DNA fragments?
*July 11, 2010*

**algebra**

solve 2x > 10
*July 8, 2010*

**math**

if an iv dose of mannitol is 1.5g/kg,administrated as 15% solution.how many mls of the solution should be administered to 150 pound patient
*June 25, 2010*

**math**

Perform the addition on the 12-hour clock. 5 + 11 (Points : 1)
*June 24, 2010*

**business**

can you give me a business scenario
*June 22, 2010*

**chemistry**

True or False CH4 probably has a lower boiling point than SnH4
*June 21, 2010*

**chemistry**

How much heat would be relaesed by the condensation of 5.40g of steam at 100 (degrees)C and the subsequent cooling of the water to 25(degrees)C? [(delta)Hvap=40.7 KJ/mol at 100(degrees)C; Cp for H2O(l) is 4.18Jg-1 (degrees)c-1] A) 12.2 kj B) 18.3 kj C) 12.8 kj D) 13.9 kj E) 23...
*June 21, 2010*

**chemistry**

Ethyl alcohol (CH3CH2OH) has a heat of fusion of 5.01 kj/mol. How much heat in kj is required to melt 137g of ethyl alcohol.
*June 21, 2010*

**Economic **

also i picked United States as the best place to raise a child but i need help starting the intro
*June 20, 2010*

**Economic **

Describing which country you would rank as the best place to raise a child. Be sure to include comparisons such as Literacy rates, infant mortality rates, and at least 5 metrics of the country that you feel might be important to your child. ***what do you about metrics?****
*June 20, 2010*

**Economics**

which country would rank as the best place to raise a child. Be sure to include comparisons such as Literacy rates, infant mortality rates, and any other comparison of a country that you feel might be important to your child.
*June 19, 2010*

**algebra**

Simplify i^-10 How exactly do I solve for this?
*June 17, 2010*

**business**

I'm tring to get on the right page of doing a business model for walmart tring to find the organization,commerce and occupation
*June 17, 2010*

**chemistry**

how many grams of CO2 are produced if 25.0 g of C6H6(BENZENE) was burned?
*June 16, 2010*

**business**

Your friend has asked you why the price of bananas is higher during certain times of the year. Using what you have learned about the laws of supply and demand, explain to your friend how the market affects price.
*June 14, 2010*

**Intro to Finance**

compare and contrast long- and short-term financing. Describe situations in which each type of financing would be used.
*June 12, 2010*

**business**

1. According to the Wolf article, the courts have imposed an "interactive-passive" test of jurisdiction. 2. @ Explain that distinction. According to the Wolf article, is advertising on the web alone enough to confer personal jurisdiction
*June 11, 2010*

**algebra**

ãx + 7 = 2ãx a)(3/7) b) (0) c) (7/3) d) 0
*June 9, 2010*

**algebra**

sqrt() x + 7 = 2sqrt()x a) {3/7} b) {0} c) {7/3} d) 0
*June 9, 2010*

**5th grade**

pressure systems bringing in hurricanes, tornados,and other storms
*June 9, 2010*

**college**

The first difference of a sequence is 6, 10,14,18. The sum of the first two terms of the original sequence is 24. Find the first three term of the original sequence. the first term of the original sequence is?
*June 8, 2010*

**algebra**

Simplify: sqrt() 27 - sqrt() 8 + 2 sqrt() 2 a) 0 b) 3 sqrt () - 2 sqrt() 2 c) 3 sqrt () - 4 sqrt () 2 d) 3 sqrt () 3
*June 8, 2010*

**algebra**

simplify the following radical expression: 3 sqrt () -216x^2/x^2 a) sqrt() -6x b)-6 c)-6 sqrt()x d) 6 sqrt()-x
*June 8, 2010*

**statistics**

that last post, the last number is 120
*June 8, 2010*

**statistics**

Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a.Percentage of scores less than 100b.Relative frequency of ...
*June 8, 2010*

**algebra**

What is the approximate value of sqrt()7? a) 1.9 b) 2.2 c) 1.5 d) 2.6
*June 3, 2010*

**algebra**

d^23
*June 3, 2010*

**algebra**

Thank you Jen
*June 3, 2010*

**algebra**

The area of a rectangle is 60 in ^2. The length is 4 inches greater than the width. Find the length. a) 6 in. b) 3 in. c) 4 in. d) 10 in.
*June 3, 2010*

**algebra**

Thank you Ms.Sue :)
*June 3, 2010*

**algebra**

The area of a rectangle is 72 in^2. The width is 6 inches greater than the length. Which expression represents? the width? a) w = 1 * 6 b) w = 1 + 6 c) w = 1 - 6 d) w = 6 - 1
*June 3, 2010*

**algebra**

Thanks
*June 3, 2010*

**algebra**

The area of a rectangle is 144in^2. The length is 4 times greater than the width. Which quadratic equation represents the area of the rectangle? a) w(w - 4) = 144 b) w(w + 4) = 144 c) w(4w) =144 d) w(4 - w) = 144
*June 3, 2010*

**statistics**

Give one example of when practical significance would outweigh statistical significance? Explain your rationale
*June 1, 2010*

**COMM215**

The teacher said they were going to grade the test over the weekend. Is it A. Pronoun shift in number B. Pronoun shift in person C. Ambiguous reference D. No error
*May 27, 2010*

**chemistry**

-log(2.62x10^-1) = 0.58
*May 27, 2010*

**calculus**

Use the first five terms of the exponential series and a calculator to approximate each value to the nearest hundredth. e^3.5 I honestly don't understand the concept or how to solve the problem. :(
*May 26, 2010*

**Chemistry**

Calculate the enthalpy change (delta H) in kJ for the following reaction. 2Al(s) + Fe2O3 (s) ==> 2 Fe(s) + Al2O3(s) use enthalpy changes for the combustion of aluminum and iron. 2Al(s) + 3/2 O2(g) ==> Al2O3(s) Delta H: -1669.8 kJ 2Fe(s) + 3/2 O2(g) ==> Fe2O3 (s) Delta...
*May 23, 2010*

**Chemistry**

Calculate the enthalpy change (delta H) in kJ for the following reaction. 2Al(s) + Fe2O3 (s) ==> 2 Fe(s) + Al2O3(s) use enthalpy changes for the combustion of aluminum and iron. 2Al(s) + 3/2 O2(g) ==> Al2O3(s) Delta H: -1669.8 kJ 2Fe(s) + 3/2 O2(g) ==> Fe2O3 (s) Delta...
*May 23, 2010*

**college**

How do i find the slope of the line containing the pair of points (5,4) and (7,-10)slope m= what
*May 23, 2010*

**Chemistry**

When 2 mol of solid magnesium (Mg) combines with 1 mole of oxygen gas (O2), 2 mol of solid magnesium oxide (MgO) is formed and 1204kJ of heat is released. Write the thermochemical equation for this combustion reaction.
*May 19, 2010*

**poetry**

thank you so much :)
*May 19, 2010*

**poetry**

i need help on thinking of a IAMBIC and TROCHAIC poem.
*May 19, 2010*

**English**

correct or incorrect? Sally wants a new bicycle,but her mother and father will not buy her one. My little sister is a big baby;she cries all the time. Mr.Smith,my spanish teacher,is going on vacation. Parents want their children to go to college;however they do not always have...
*May 18, 2010*

**english**

Correct or incorrect? My Garden is full of water,because of yesterday's rain.
*May 18, 2010*

**biology help**

Pick one of the multiple choice that best matches the answer. For grasshoppers and locusts to be in the same family they must also be in the same a. order b. group c. genus d. species
*May 18, 2010*

**poetry**

thank you so much :)
*May 17, 2010*

**poetry**

oh yea sorry i meant troy.
*May 17, 2010*

**poetry**

thank you so much
*May 17, 2010*

**poetry**

I need help to think of 3 more lines to finish this poem. "Dashing trough the streets of Toy, Greeks with swords, and not one coy, Wooden horse was brought within, --------------------------------- --------------------------------- ---------------------------------
*May 17, 2010*

**health**

What are the key anatomical parts of the cardiovascular system and how does it work.
*May 16, 2010*

**reimbursement methodologies**

Robles, I am working on this exam right now. I am having problems with the question - What reimbursement amount will the hospital recive from Medicare? You say it is A. $12,856. What are your calculations? I just can't see how you came up with that amount. If Robles or ...
*May 12, 2010*

**chemistry**

How do you calculate the energy change required to take 45g of water vapor at 126 degrees C to ice at -25degrees C?
*May 12, 2010*

**Algebra**

solve for h. d=1.2 square root h
*May 12, 2010*

**college**

i need math help please. on a math problem
*May 10, 2010*

**college algebra**

4. The yearly cost T, in thousands of dollars, of tuition and required fees at a private college (includes two- and four-year schools and does not include room and board) can be approximated by T= 3/5n + 5 where n is the number of years since 1985. That is, corresponds to 1985...
*May 9, 2010*

**science**

which best describe the desert? a.thick,waxy leaves b.many large leaves. c.a shallow root system.d.a tall,woody stem.
*May 4, 2010*

**4th grade science**

on which of theseb do the phases of the moon have an affect? a. the season b.ocean tides c.day and night d.weather
*May 3, 2010*

**science**

On which of these do the phases of the moon have an affect? a.the season b.ocean tide c.day and night d.weather
*May 3, 2010*

**science**

on which of these do the phases of the moon have an affect? a.the season b.ocean tiders 3.day and night 4.weather
*May 3, 2010*

**chemistry**

Explain why the rate of a simple chemical reaction such as NO(g)+1/2O2(g)=NO2(g) is likey to be most rapid at the beginning of the reaction.
*May 3, 2010*

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