Sunday
April 20, 2014

Posts by David


Total # Posts: 1,595

Math
antiderivative of (x-2)/(x-1)

Marcoeconomics
And is the bond price=face value?

Marcoeconomics
if Bond price= the discounted value of all the future income it will generate then does it mean that the buyer of the bond earn nothing? Because he in fact need to pay the discounted value of the future income(interest) which is said to be earned by him when buying the bond. T...

Marcoeconomics
My logical deduction is: asset demand for money + transaction demand for money= money demand=supply of bond(as bond issuers create supply of bonds)

Marcoeconomics
According to the formula, Bond price= y/r so bond price has a inverse relationship with interest rate.i.e. interest rate increases, bond price decreases. But why does it contradict with this demand-supply anysis: r(interest rate increases)--> returns from buying bonds incre...

Reiny! Reiny! Reiny! Answer Check and HW Help!
3) Answer (12, 28) 4) Answer (4, 22)

Engineering
Two pieces of steel are held together with six bolts. One end of the first piece of steel is welded to a beam and the second piece of steel is bolted to the first. There is a load of 54,000 pounds applied to the end of the second piece of steel. The tensile strength of steel i...

Engineering
5. Two pieces of steel are held together with six bolts. One end of the first piece of steel is welded to a beam and the second piece of steel is bolted to the first. There is a load of 54,000 pounds applied to the end of the second piece of steel. The tensile strength of stee...

Engineering
Thanks bob mind helping me with one more? The questions all ready posted, same subject.

Engineering
Determine the required nominal diameter of a threaded steel rod to carry an axial load of 16,000 pounds in tension if the tensile stress of 20,000 psi is permitted.

chemistry
a 16.2 L sample of CO(g) at 1.50 atm and 200.*C is combined with 15.39g of Fe2O3(s), How many moles of CO(g) are availabe for the reaction

AP Calculus
how do you evaluate integral of [lxl] from (0,2) , a step function. would you just do it as if it were a absolute value and then do two different integrals?

Calc
find the area between y=x^3–14x^2+45x and y=–x^3+14x^2–45x i am having trouble how the graphs look like and how to do this...

chemistry
.77

statistics
The questioner doesn't want the weighted mean, she wants the mean of the difference. This is equal to the difference between the means, or 0.12.

Math
You have a mean score of 86 on 9 quizzes. The teacher decides to drop your lowest quiz score to determine your final quiz mean. After dropping the lowest score, your mean score on the 8 remaining quizzes is 88. What score was dropped?

the novel "Ordinary People" by Judith Guest
Has anybody read this book? I have a few questions to ask, I've read the book but forgotten a few things reply ASAP!

Physics
(a)M.A=2 (B)F=186.6N(C)MASS=20KG,W=173N

accounting
Are condominiums taxable or exempt

12th grade English
A Lesson Before Dying- Quotations Analysis. " I had gone to barbershops;I had stood on street corners, and i had gone to many suppers in the quarter.But i had never really listened to what was being said.Then i began to listen, to listen closely to how they taked about th...

Finance-options
this was an exam question...i answer for a) long call option b) long put option. But i got it wrong, the instructor won't tell us the answer, he wants us to figure it out ourselves. But i just don't know. Any guidance would be helpful.

Finance-options
I need help on the following question. Suppose that you are the manager and sole owner of ahighly leveraged company. All the debt will mature in one year. If at that time the value of the company is greater than the face value of the debt, you will pay off the debt. If the val...

Chemistry
thanks a lot !!!

Chemistry
Q1. What will be formed when propanone reacted with sodium hydrogensulphite? There is white precipitate is the resulting solution . Is it sodium carbonate? Q2. What are the difference in the products bewteen the reaction of ethanal and propanone reacting with 2,4-dinitrophenyl...

Chemistry: ketone and aldehydes
Q1. What will be formed when propanone reacted with sodium hydrogensulphite? There is white precipitate is the resulting solution . Is it sodium carbonate? Q2. What are the difference in the products bewteen the reaction of ethanal and propanone reacting with 2,4-dinitrophenyl...

Chemistry
Q1. What will be formed when propanone reacted with sodium hydrogensulphite? There is white precipitate is the resulting solution . Is it sodium carbonate? Q2. What are the difference in the products bewteen the reaction of ethanal and propanone reacting with 2,4-dinitrophenyl...

French
Please correct the verb tenses in the following paragraph Alceste, le gros copain de Nicolas, se passionne pour la nourriture. Chaque fois qu’il sort avec ses amis il a envie de manger. La semaine dernière ses amis et lui ont décidé d’aller au ma...

Financial management
evaluates investment opportunities using payback. The finance director who has been with the company since its formation in 1975, has recently heard that this method may not be the best for evaluating long term projects. You have been brought in to advise the company and have ...

English
Leaving Home(the play)proves that the family structure is by far the greatest cause of people's social dysfunctioning. say why you agree or do not agree with this statement.

math help me
sorry because of misunderstood of the question. The above answer is wrong

math help me
case 1 : both bottle give red balls 1/2 * 1/2 = 1/4 case 2 : one bottle gives red ball 1/2 * 1 =1/2

chem
methanoic acid react with potassium dichromate to form what? A colorless solution and CO2 is formed as known

math
Find the first and third quartiles, Q1 and Q3, of the following set of numbers. 14, 4, 13, 18, 8, 15, 8, 3, 11, 8

math
-1/2- (-5/8)=

math need help please
-9 to the 2nd power - (-6) to the 2nd power

Pharmacy Math
The dose of gentamicin sulfate is 1.7mg/kg. How many mls of an injectable solution containing 40mg/ml should be administered to a person weighing 220 pounds? Any help is appreciated.

Pharmacy Technician
A physician prescribed 5mg/kg q day of a drug for a patient that weighs 132 pounds. How many 100mg tablets will be needed for a 2-week prescription?

Need Help on this Microeconomics question, really
If firms in perfect competition all pay the same price for resources and all receive the same price for outputs, how can they have different total profits or different profits per unit sold?

Math
Make up a data set of at least 12 numbers that have the following landmarks. Maximum : 18 Range : 13 ___________________________________ ___________________________________ ____ mode: 7 median: 12

seventh grade science
Thank you!

seventh grade science
Thank you. I looked it up in a dictionary, but I do not understand the terminology. Can you please explain it in a simpler language? Thank you.

seventh grade science
what is a monomer what is a polymer what is the structure of a protein

Need examples of variable and fixed inputs (micro)
I just need some example of fixed and variable inputs.

Math
Imagine there are 100 lockers. Each locker is given a number 1-100. When the students are assigned to their lockers, the 1st student runds down the row of lockers and opens every door, student #2 closes the doors of locker #'s, 2,4,6,8, etc. to the end of the line. Student...

Microeconomics help please (urgent)
True or False? Explain your reasoning. a. The short-run average total cost can never be less than the long-run average total cost. b. The short-run average variable cost can never be less than the long-run average total cost. c. In the long run, choosing a higher level of fix...

8th grade
I went to an unscramble a word site and came up with this "Zach's Word Unscrambler" Results The scrambled word you entered was "afsedrniru " ... Sorry, No Matches Were Found...

Microeconomics (margin Utility) need clarification
Someone was kind enough to help me with this question, but i was still confused on how they helped me with the first part of my question. The original question was: You go to an auction and set a maximum price of $100 you are willing to bid on an item. However, you are fortuna...

Microeconomics help please (urgent)
Thank you. I will remember the advice in the future:)

Microeconomics help please (urgent)
You go to an auction and set a maximum price of $100 you are willing to bid on an item. However, you are fortunate and purchase it for $50. 1) Does the lower price alter the marginal utility you originally placed on the item? 2) Is your potential total utility increased becaus...

Math
Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem? I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I am lost after that This is a multiple choice question and I am not getting any of the choices a.) -161/...

Formula help
This is a multiple choice question and I am not getting any of the choices a.) -161/8 b.) 120/7 c.) 161/7 d.) -17

Formula help
Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem?

Help
Now solve for speed of wind in the first equation.. 33km/time=32km/hr-speedwind. How do I do that?

Physics
You should start by listing the given information. vi = 0 vf = 100 m/s t = 12.5s a = (vf-vi)/t A). a = (100m/s - 0m/s)/12.5 s a = 8.00 m/s^2 B). You can use several equations for this question. I'm going to use: d = (vf + vi)/2 * t. d= (100m/s + 0m/s)/2 * 12.5 s d= 625m C)...

o-chem
explain how the rate of crystal growth can affect the purity of a recrystallized compound

o-chem
explain how the rate of crystal growth can affect the purity of a recrystallized compound

o-chem
well im confused because you said one needs to be great and the other has to be poor. so if you combine both do you get a great solvent or a horrible one?

o-chem
thanks. i understand why e won't work, but im a little confused on choice a. they both dissolve a wide range of solutes so would it be a great solvent?

o-chem
Explain whether or not each of the following pairs of solvents might be useful as a solvent pair for recrystallization. (a) ethanol-methanol (b) hexane-cyclohexane (c) acetone-ethanol (d) water-ethanol (e) water-cyclohexane

O- chemistry
During a recrystalliztion experiment, a student allows the hot solution to cool to room temperature, then chills the solution in an ice bath. Is the student using correct recrystallization technique? Why does the student not simply chill the hot solution in an ice bath initially?

AP US History
1775 to 1800

Re
i need to find eveidence of 3 things that jesus did and 3 things jesus didn`t do. thanks!

grammar
What part of speech is the word "Below" used in the following sentence. Below the main level, we have a large playroom.

education
Just to take the very first term you've listed, are you suggesting that income is a characteristic of a multicultural school? What would that mean - that a multicultural school has income? And if so, is that what you're trying to say? I don't think it is, is it? Or...

Calculus
8/h -> infinity as h -> 0, so I don't see how the above expression can tend to anything other than minus infinity.

Math
Can I throw in a note of clarification? Melissa'a answers are actually correct: what's INcorrect is the algebra that apparently gave rise to them. As Bob pointed out, the "16 divided by 6" is actually a measure of inches per car, not cars per inch. Also, the ...

algebra ll
im having trouble with this problem 6( n - 4 ) = 3n

Math
No, I'm sure the problem is written like this: [(3a^3-27a)/(2a^2+13a-7)]/[9a^2/4a^2-1)] And to divide you multiply by the reciprocal. So i still don't get the problem I also know to factor, but I'm stil confused.

Math
No, I'm sure the problem is written like this: [(3a^3-27a)/(2a^2+13a-7)]/[9a^2/4a^2-1)] And to divide you multiply by the reciprocal. So i still don't get the problem I also know to factor, but I'm stil confused.

Math
I'm totally stuck on this problem!! Simplify: (2a^2+13a-7/3a^3-27a)(4a^2-1/9a^2)

Algebra II/Trig
No, Problem! Thank you so much for the answer!

Algebra II/Trig
Simplify: (n/4)/(n/m) As my answer I got: 4m Is this response correct? If not, please let me know what I did wrong.

Math check
No, you distributed the 4 to the y only. You also need to distribute the 4 to the 8. This would then make the answer 4y+32

Math
Simplify: 24w^7t^4/6w^9t^2 And How Exactly do u do this? I got 4w^16t^6

Algebra II/Trigonometry
Thank you so much drwls! I can not believe I did not figure that out!

Algebra II/Trigonometry
Simplify this problem: (1/2m^4n^5)^2

English
No. I think you should work the subject back in, in place of "it" and remove the "s" tacked on to the end of accomplishment

math
Can someone show me all the combinations possible with these things A B X Y LB RB LT RT L R U D

math
img59.imageshack.us/img59/4912/dsc00716qy7.jpg

Physics
A passenger on a train traveling 90km/h on a straight, level track notes that it takes another train (180 m long and moving with constant velocity) 4.0s to pass by. What is the velocity of that passing train relative to the ground? **please include explanation** thnx!!

Chemistry
Nope, Kristen is right. It can also be written as 4-methylpent-2-yne but it's the same thing.

MAT 116 Algebra 1A
V = 1/5 ð t^2 s

Physics **PLEASE HELP**
plz ignore the 1st part just plz help with this: what's the relation between resistance and voltage?

Physics **PLEASE HELP**
During a short circuit, why does the voltage go down? I know that the resistance is almost zero...but what's the relation between resistance and voltage?

Geometry
They are similar. because ALL triangles have and will always have 180 degrees. BOTH of the right triangles have an 90 degrees angle, which leaves 90 degrees left in both triangles than they have an another angle which is less than 90 (x degree) just by knowing this, you can sa...

Geometry
They are similar. because ALL triangles have and will always have 180 degrees. BOTH of the right triangles have an 90 degrees angle, which leaves 90 degrees left in both triangles than they have an another angle which is less than 90 (x degree) just by knowing this, you can sa...

Chemistry
For the following electrochemical cell: Fe(s) | Fe2+(aq) || MnO4–(aq), Mn2+(aq) | Pt(s) Which letter corresponds to the correct balanced chemical equation in an acidic solution? A. 2Mn2+(aq) + 8H2O(l) + 5Fe2+(aq)-> 5Fe(s) + 16H+(aq) + 2MnO4–(aq) B. Fe(s)+8H+(aq)+M...

Chemistry
For the following balanced equation: 2Ag+(aq) + Cu(s)<->Cu2+ (aq) + 2 Ag(s) Which letter corresponds to the correct cell notation at standard state conditions? A. Cu(s) | Cu2+(aq) || Ag+(aq) | Ag(s) B. Ag+(aq) | Cu2+(aq) || Cu(s) | Ag(s) C. 2Ag+(aq) | Cu2+(aq) || 2Ag(s) ...

chemistry
The first step of the synthesis is described by the reaction below. When 1.200 g of Fe(NH4)2(SO4)2 6H2O is mixed with 13 mL of 1.0 M H2C2O4 , the theoretical yield of FeC2O42H2O is grams. Fe(NH4)2(SO4)26H2O(s) + H2C2O4(aq)-> FeC2O42H2O(s) + (NH4)2SO4(aq) + H2SO4(aq) + 4 H2...

math
Astro Knots

chem
H2 + H2O ->??

chemistry
Because solution pH is a measurement of either [H3O+] or [-OH] concentration, the acidic or basic nature of the acids and bases used in this experiment can be ascertained by inspecting just the density (electrostatic) potentials from the products (which contain either H3O+ or ...

Chemistry
What does the density potential (also known as the electrostatic potential) measure? What do the colors on the images indicate?

chemistry
calculate the equilibrium constant for the reactionas written at 940K. NH4Cl->NH3+HCl delta H= NH4Cl -1779, NH3 -46, HCl -92 delta s= NH4Cl - 682,NH3 192,HCl 187 i dont know how to solve for the equilibrium constant without the concentration of the values???

chemistry
The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.520. If a trial's absorbance is measured to be 0.275 and its initial concentration of SCN– was 0.00060 M, the equilibrium concentrati...

chemistry
thanks

chemistry
The correct interpretation of the equation below is:? Fe3+(aq) + SCN¨C(aq)¡ú FeSCN2+(aq) A. The reaction is incomplete because the product is still charged. B. A heterogeneous equilibrium exists because of the charged ions. C. The equilibrium constant is Kc = ...

chemistry
the concentration of OH ions in a household ammonia cleaning solution is0.0035M. Calculate the concentration of H ions. would it be pH=-log (.0035)??? or Kc=1/.0035???

chemistry
If a solution is diluted, say by adding 100ml of solvent, does the number of moles of solute change? Does the concentration increase, decrease, or stay the same? i think it depends on what the solvent is, for example if its water then the concentration would decrease?? please ...

Algebra 2
A package with square ends has a combined length and girth (girth is the perimeter of a cross section) of 120 in. The surface area of the entire package is 3600 sq. in. Determine the dimensions of thr package. s in.*s in.*l in. one solution is: 11.08in*11.08in*75.68in. find th...

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