Friday

August 22, 2014

August 22, 2014

Total # Posts: 427

**Chemistry Kb question need to clarify something**

-3.36(log button or 10^x button)= syntax error ??
*December 16, 2010*

**Chemistry Kb question need to clarify something**

the pKb for methylamine is 3.36, what is the Kb for methylamine? pKa+pKb= 14.00 Kb= 10^-pKb = 4.4x10^-4 is the answer but HOW?? what is punched into the calculator to get 4.4 x 10^-4??
*December 16, 2010*

**chemistry!**

determine the pH of the following mixture. 50.0 mL of 0.0260 M Benzoic acid and 0.626 g of sodium benzoate (assume the final volume is 50.0 mL) please explain the steps
*December 15, 2010*

**Chem**

thank you but I got 4.00 and it's incorrect. 11.2LC8H16/22.4L=.5 1mol/.5=8mol/x .5*8=4
*December 14, 2010*

**Chem**

Given the reaction: C8H16 + 12O2 --> 8CO2 + 8H2O How many moles of H2O are produced when 11.2 liters of C8H16 gas, measured at STP, reacts completely?
*December 14, 2010*

**Chem**

What is the percent by mass of oxygen in Al2O3?
*December 14, 2010*

**Chemistry**

what distinguishes ionic from moolecular or atomic solids
*December 14, 2010*

**chem**

The mole fraction of an aqueous solution of potassium perchlorate is 0.125. Assuming that the density of this solution is 1.20g mL-1, calculate the following: (A) the mass percent of potassium perchlorate in the solution. (B) the molarity of potassium perchlorate in the ...
*December 14, 2010*

**chem **

25.0 mL of 0.125 M silver nitrate are mixed with 35.0mL of 0.100 M sodium sulfate to give solid silver sulfate. Write the net ionic equation, and determine the mass in grams of silver sulfate produced. I think the net ionic equation is 2Ag(aq) + SO4^-2(aq) ---> AgSO4(s) but...
*December 14, 2010*

**Probability**

How could picking three dates at random in the month of April be simulated using a random digit table? (Please show and explain)
*November 23, 2010*

**college algebra**

What is the fundamental theorem of algebra of this polynomial in completed factored form? and how do I graph it? f(x)=x^5-x^4+x^3-x^2+x-1
*November 15, 2010*

**college algebra**

What is the fundamental theorem of algebra of this polynomial in completed factored form? and how do I graph it? f(x)=x^5-x^4+x^3-x^2+x-1
*November 15, 2010*

**programing**

Hi Anthony, I have this same class with the same question. I'm not sure what you are asking here. You just stated the instructions.
*November 15, 2010*

**Health Care**

Do you think that there is a difference if an EMR system is put into a small facility or a big facility?
*November 3, 2010*

**Organic Chemistry**

If you dont neutralize the aqueous solution, then the acid crystals will not reform. The basic aqueous solution contains the conjugate base of the acid. you need to reprotonate this in order to get the crystals. Hope this helps...if you are in Thursday Lab at UCI with Kim...Me...
*November 3, 2010*

**SCI230 UOP**

Also, remember to include each topic of your outline in your final paper. My professor required the bulleted format in my outline.
*November 1, 2010*

**statistics**

I have been working on this problem (and looking through my book and the internet) and could use direction. Info given: P(A or B)=.85 (A has line over it) P(A and B)= .41 (A has line over it) P(A or B)=.21 (A and B have line over it) Find P(A/B) (B has a line over it) I am not...
*October 27, 2010*

**Math**

Have to find the age of a family of 7. I'm told that the youngest child is 6, the oldest is 16 have a set of twins that are 15. The mean is 11 and the mean is 10. I added up all the numbers and got 73. Thought that if I added 4 I got 77 and then could get to the mean, but ...
*October 27, 2010*

**Stat**

Actually that is the question given to me (only that info). I used the formula for the confidence interval for a proportion where you have to find the sample proportion. I used both 1.65 and 1.645 but to no avail to get that answer.
*October 22, 2010*

**Stat**

For a sample of 200 patients diagnosed with allergies, 25 were men. What is the 90% confidence interval for the population proportion? I set this up and got the answer of .087 -.16. The book has .091-.17. Could use help---I must be missing something.
*October 22, 2010*

**english**

I get it...if I ask related what? doesn't make sense. Related who, doesn't make sense. Thanks
*October 18, 2010*

**english**

why is one not transitive? If I ask what is related I get wheat, barley, oats???
*October 18, 2010*

**english**

I think 1. is transitive 2. is transitive 3. transitive 4. transitive ?
*October 18, 2010*

**english**

In the sentences below, which are transitive or intransitve verbs? 1. It is related to wheat, oats and barley. 2. Their size might surprise you. 3. Some reach a height of 120 ft. 4. The stems measue a foot in diameter
*October 18, 2010*

**math**

A typical question found on psychology exams is answered by only by 22% of the respondents. Everyone else just leaves it blank. Estimate the probability that among the next 150 responses there will be at most 40 that answer it correctly. Incidentally, the question is "Why...
*October 10, 2010*

**statistics**

Women comprise 80.3% of all elementary school teachers. In a random sample of 300 elementary teachers, what is the probability that more the 3/4 are women?
*October 9, 2010*

**statistics**

Use of normal distribution to approximate the desired probability. Find the probability of getting at least 30 fives in 200 tosses of a fair 6 sided die.
*October 8, 2010*

**Statistics**

A multiple choice test consists of 60 questions. Each question has 4 possible answers of which one is correct. If all answers are random guesses, estimate the probability of getting at least 20% correct? Trouble with deciding p, n, q, and P (X)
*October 8, 2010*

**Statistics**

Hey--that is clever!! Thank you.
*October 3, 2010*

**Statistics**

In a given normal distribution, the standard deviation is 14.4 and 8.27% of the distribution lies to the left of 60. What is the mean?
*October 3, 2010*

**Statistics**

What z-value corresponds to the 18th percentile?
*October 3, 2010*

**Chemistry**

I am currently working on drawing isomers and find that I become way too creative in my structures. It would be helpful to know how many I should come up with... All isomers of C5H10O that contain a carbonyl group. I am looking for a number/count of them. Thanks is advance!
*September 28, 2010*

**Math**

Where do I inerst parenthesis to make the following statement true: 56 divided by 3 +4 x 1 + 2 =24
*September 27, 2010*

**Statistics**

If I deal you one card from a standard deck of 52 and it is a face card, I will give you a $5.00 bill. There are 12 face cards. There is one catch: You have to pay me something to play this game. How much would that be if the game is to be fair?
*September 26, 2010*

**statistics**

A student takes a 20-question, true/false exam and guessed on each question. Find the probability of passing if the lowest passing grade is 15 correct out of 20.
*September 26, 2010*

**Psydag--stat**

Thank you very much--I too finally got this answer.
*September 26, 2010*

**Psydag--stat**

An insurance company insures a person's antique coin collection worth $20,000 for an annual premium of $300. If the company figures that the probability of the collection being stolen is 0.002, what will be the company's expected profit?
*September 26, 2010*

**Stat**

An insurance company insures a person's antique coin collection worth $20,000 for an annual premium of $300. If the company figures that the probability of the collection being stolen is 0.002, what will be the company's expected profit?
*September 26, 2010*

**Statistics**

This is familiar to me--the answer from my book is 0.027. ????
*September 25, 2010*

**Statistics**

Working of a problem--I have found the mean, variance and the standard deviation from the following info: The probability that a cellular phone company Kiosk sells X number of new phone contracts per day is shown below---- X=4, 5, 6, 8, 10 P(X)=0.4, 0.3, 0.1, 0.15, .0.05 Mean...
*September 25, 2010*

**Statistics**

Sorry--I guess I was using the logic that with so many people using this that my questions may have been overlooked. I have had a couple questions that haven't been addressed this week. Again, sorry for the inconvenience. I truly appreciate the help.
*September 25, 2010*

**Statistics**

Working of a problem--I have found the mean, variance and the standard deviation from the following info: The probability that a cellular phone company Kiosk sells X number of new phone contracts per day is shown below---- X=4, 5, 6, 8, 10 P(X)=0.4, 0.3, 0.1, 0.15, .0.05 Mean=...
*September 25, 2010*

**Statistics**

At one college, 2/3 of the professors have doctorates. If a student signs up for 5 classes, what is the probability that 4 of the professors will have a doctorate? I have difficulty defining the X in the binomial distribution?????
*September 24, 2010*

**Statistics**

I get this!!
*September 24, 2010*

**Statistics**

37% of all doctors are family practitioners. If there are 300 doctors in one city, what is the standard deviation for the number of family practitioners? What is the expected value for the number of family practitioners?
*September 24, 2010*

**Statistics**

The probability that a person owns a microwave oven is .75, that a person owns a compact disk player is .25, and that a person owns both a microwave and a CD player is .16. Find the probability that a person owns either a microwave or a CD player, but not both.
*September 23, 2010*

**Statistics**

The probability that a person owns a microwave oven is .75, that a person owns a compact disk player is .25, and that a person owns both a microwave and a CD player is .16. Find the probability that a person owns either a microwave or a CD player, but not both.
*September 23, 2010*

**Statistics**

Any one want to take stab @ this??
*September 23, 2010*

**Statistics**

Box A contains 4 red and 6 blue balls. Box B contains 5 red and 10 blue balls. A box is selected at random and a ball is drawn. Find the probability that the ball is blue, given that it came from Box B.
*September 23, 2010*

**statistics**

That is what I got on my quiz--answer he told me was 10/19??
*September 22, 2010*

**statistics**

Box A contains 4 red and 6 blue balls. Box B contains 5 red and 10 blue balls. A box is selected at random and a ball is drawn. Find the probability that the ball is blue, given that it came from Box B.
*September 22, 2010*

**Statistics**

A manufacturer makes two models of an item: model I, which accounts for 80% of unit sales, and model II which accounts for 20% of unit sales. Because of defects, the manufacturer has to replace (or exchange) 10% of its model I and 18% of model II. If a model is selected at ...
*September 22, 2010*

**statistics**

Box A contains 4 red and 6 blue balls. Box B contains 5 red and 10 blue balls. A box is selected at random and a ball is drawn. Find the probability that the ball is blue, given that it came from Box B.
*September 22, 2010*

**statistics**

A coin is weighted in such a way that a tail is twice as likely to occur as a head. If the coin is tossed twice, what is the probability of obtaining two tails?
*September 20, 2010*

**statistics**

P(A)=.37, P(B)=.19, P(A and B)=.13. What is the probability that A doesn't occur or B does?
*September 20, 2010*

**statistics**

P(A)=.37, P(B)=.19, P(A and B)=.13. What is the probability that A doesn't occur or B does?
*September 20, 2010*

**statistics**

In a box of thirty AAA batteries, there are three defective batteries. Two batteries are randomly selected and tested. What is the probability that both are defective, if the first one is not replaced after being tested?
*September 19, 2010*

**Statistics**

Thank you for trying--appreciate it.
*September 19, 2010*

**Statistics**

I seem to get 0.167--book has 0.1157
*September 19, 2010*

**Statistics**

Roll two standard dice and add the numbers. What is the probability of getting a number larger that 9 for the first time on the third time.
*September 19, 2010*

**Statistics**

the answer the book is 243/1024
*September 19, 2010*

**Statistics**

In a department store there are 120 customers, 90 of whom will buy at least 1 item. If 5 customers are selected at random, one by one, find the probability that all will buy at least 1 item.
*September 19, 2010*

**Math**

An aircraft manufacturer determines that one of it's aircrafts has twice as many seats as another. Find the number of seats for each aircraft if the total number of seats is 336.
*September 3, 2010*

**algebra**

What is 7/16+2x=9/8 if you solve for x?
*August 24, 2010*

**Algebra**

If a pro basketball player has a vertical leap of 25 inches, what is his hang time? Use the hang time function V = T^2 Hang time is _________ seconds. Simplify the answer. Type an integer or a decimal Round to the nearest tenth. The answer I came up with is .52 seconds. Can ...
*August 17, 2010*

**algebra**

Thank you, I thought I was on the right track but wasn't sure.
*August 17, 2010*

**algebra**

Find the variation constaant and an equation of variation where Y varies directly as X and Y = 72 hen X = 8 The variation constant is K = ? The equation of variation is Y = ? I think that K = 9 but not sure I don't have a clue about the rest.
*August 17, 2010*

**IT210 week7/ DQ1**

• Due Date: Day 2 [Main] forum • Please post pseudocode or code showing how you would access a file as either a database or a sequential file. Describe in your code the differences between accessing the data. Post what is needed for this weeks assignment.
*August 10, 2010*

**Algebra**

Describe a process you can use to simplify a radical. Give an example in your answer.
*July 29, 2010*

**INB 205**

Wal-Mart Taking on the World Minicase Thank you Ms Sue. Now I need to find: Some statistics in regard to GNP and future growth potential for expanding Wal-Mart into India. What are the Government and Public Attitudes about American Products? Promotional Methods specific to ...
*July 18, 2010*

**INB**

I need to create a 7-12 slide powerpoint with 3 references for Wal-Mart Takes on the World Minicase. I don't know where to begin and I have a difficult time with research. Consider the following scenario: Your boss, the CEO of Wal-Mart, is interested in expanding ...
*July 18, 2010*

**Math**

Explain why this statement is true: when simplifying rational expressions, we must cancel factors only, and not terms. Give an example using just numbers.
*July 14, 2010*

**International Business**

Thank you
*July 11, 2010*

**International Business**

I would like to know what is viewed as a handout in a college level course. I have the two sites that I need to use as a reference but I was not sure if a table would be appropriate to list the informaton needed. I just don't know where to begin.
*July 11, 2010*

**International Business**

I have to create a 2 page handout for the following scenaario: Your company has developed a product that is all but guaranteed to be successful in any country that has a substantial population. The sales and marketing department would like you to do some research and find out ...
*July 11, 2010*

**AED **

Explain why this statement is true: when simplifying rational expressions, we must cancel factors only, and not terms. Give an example using just numbers.
*July 10, 2010*

**algebra**

Simplify the answer. Type coefficient as integers or decimals. (1.4x^3+4.8x^2-3.3x)-(-4.9x^3-4.3x^2+86)
*July 5, 2010*

**math**

Describe what the interval ( -7, 12) looks like
*June 13, 2010*

**geometry**

Draw two parallel lines on your paper. Locate four points on the paper each an equal distance from both lines. Describe the figure you get if you continue to locate points each an equal distance from both lines
*May 20, 2010*

**Eth 125**

Could somone check my grammer for me. I am not the best and could use some help. Thanks. • Imagine yourself as a current member of your selected group, and consider the following question: Would I want to immigrate to the United States, and why? Think about what opinion ...
*May 19, 2010*

**Finance**

Lee-Foods, Inc., sells 55-pound bags of tomatoes for $12 a bag. The fixed costs of this operation are $79,000, while the variable costs of the tomatoes are $.11 per pound. Please help, I have worked this out like this please tell me if this is correct FC $79,000 = $79,000 = my...
*May 18, 2010*

**math**

Explain in your own words why the line x = -8 is a vertical line.
*May 10, 2010*

**COM 220**

what is the thesis statement for A Nation Torn Apart
*April 26, 2010*

**math**

3{[3(x-5)+15]-[3(4x-3) +3]}
*April 25, 2010*

**Math**

3{[3(x-5)15]-[3(4x-3) +3]} I need help to simply this. I have been working on this for 2 hours and still don’t get it, can anyone help?
*April 25, 2010*

**Algebra**

3{[3(x-5)15]-[3(4x-3) +3]} I need help to simply this. I have been working on this for 2 hours and still don’t get it, can anyone help?
*April 25, 2010*

**Socials**

Seven Years War where were over 300 british men women and children massacred in 1757
*April 21, 2010*

**Math**

The total amount being spent on personal calls in a month by employees of a company follows a normal distribution with a mean of $900 and a standard deviation of $50. Find the probability that in a randomly selected month the amount spent on personal calls is less than $750
*April 17, 2010*

**Math**

Use patterns or a linear equation to complete the table. P 2 88 8 10 ? Q 22 ? 110 110 330
*April 17, 2010*

**Physics**

Who were two historical figures (scientists) that contributed to the process of mantle convection and plate movement?
*April 12, 2010*

**algebra**

Give the equation of the circle with center at (0, 2) and radius = 5
*April 11, 2010*

**math**

That's what I got, too. Thank you! I just wanted to be sure I was doing the problem right.
*April 11, 2010*

**math**

Give the equation of the circle with center at (0, 2) and radius = 5
*April 11, 2010*

**algebra**

without graphing, identify the slope and the y-intercept for the line associated with the equaiton. 5x + 20y = 60
*April 7, 2010*

**PreCalc**

An isosceles triangle is a triangle with two sides that are the same length. Find the measure of the two equal angles to the nearest degree in a triangle that has sides of length 5ft., 5ft., and 6ft.
*April 7, 2010*

**Precalc**

Find the smallest positive answer to the equation: sin(2x)=1
*April 7, 2010*

**Algebra**

Thank you for your help!
*March 31, 2010*

**Algebra**

2 (3a - 4) - 2 (4a + 3) simplify 2 (a + 4) = 4 (a - 3)solve the equation Any help would be appreciated, I am still learning. Thanks!
*March 31, 2010*

**MATH**

Thank you
*March 29, 2010*

**MATH**

Solve the equation 5(n+3)=2(2n+6) Simplify 4(x-1)+2(x+4)
*March 29, 2010*

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