Posts by dan

Total # Posts: 1,193

oceanography
A monster storm located 1200 km north of Hawaii generates wind waves with maximum wavelengths of 150 m. Calculate how much time you have to get to the north shore and surf the first big waves. Assume that the average depth of the North Pacific is 3800 m, and that there is no ...

IT 221
Does anyone have anything on this?

Economics
A firm with monoply power has the demand curve: P = 100 - 3Q + 4A^1/2 And has the total cost function: C = 4Q^2 + 10Q + A where A is the level of advertising expenditures. P is price, Q is output. How do I find the values of A, Q, and P that maximize the firm's profit?

Algebra II
Your solution is perfect, did you just want confirmation?

Algebra II
What exactly is your question? I don't even see a denominator anywhere :) What you have is right so far. If you want to finish that question you need to use the quadratic formula x = (-b +/- square root(b^2 - 4ac)) / 2a x = (5 +/- square root (25 + 192)) / 16 x = (5 +/- ...

Geometry and Measurement
For a right angle triangle the following equation is true: a^2 + b^2 = c^2 Where c is the hypotenuse of the triangle and a,b are the other sides (you decide which side is a and which side is b).

math
First you have to expand your terms. 7y^2 - 5y^3 - 180y^2 - 55 = -100 Collect like terms. -5y^3 -173y^2 = -45 now factor the y^2 y^2(-5y - 173) = -45 There are two solutions to this equation. y = 0 and 5y + 173 = 45 which yields y = -25.6

Math
n is the number of moles. It's usually equal to one to simplify matters.

Physics
I'm not familiar with that particular term, but mach number .85 could possibly mean 0.85 times the speed of sound.

calculus
"If the sequence An converges to 0, and each An is smaller than An-1 (i.e. the sequence An is monotone decreasing), then the series converges." In this case, An = 1 / (3n + 1) The limit as n->infinity (An) = 0 A1 = 1 / 4 A2 = 1 / 7 Therefore, by the Alternating ...

Math - Slight Error
Whoops, I read those numbers wrong. The area of two sides will be l*h and the other four will be w*h. So the total area = 2(l*h) + 4(w*h) Sorry about that :S

Math
I'm assuming length is depth. A rectangular solid has 6 sides, so the total area will simply be 6 times the area of one side. The area of one side is the area of square which is w*h. The volume of a rectangular solid is l*w*h. From Google, "The lateral area is the ...

right triangles can't have decimals in the angles?
Did you teacher actually say that's why you lost 2 marks? It might have been lack of decimal place(s) or an incorrect answer. Triangles can definitely have decimal angles.

Electrostatics
A linear charge rho L = 2.0 uC lies on the y-z plane. Find the electric flux passing through the plane extending from 0 to 1.0m in the x direction and from -infinity to infinity in the y direction. Alright, so the formula to use is: flux = (integral(integral)(Ds * dS)) where ...

math
Whoops, the answer should just be x = (4/3)^(1/3) or x = the cube root of (4/3) Bad grammar :P

math
Well 3x * x^2 = 3x^3 So now you have 3x^3 = 4 then x^3 = 4/3 so x = the cubed root of (4/3)^(1/3) Where ^ indicates "to the power of".

math
No problem :)

math
5^3 = 125 So how do we get 125^(1/3) from this? Simply take the cubed root of both sides. (5^3)^(1/3) = 125(^1/3) What then, must the cubed root of 125 be?

math
The "square root" of a number simply means the number is raised to the power of 1/2 or 0.5. So your question becomes (((125)^1/2)^4)^1/6 When you have exponents beside each other you simply multiply them. So the question becomes 125^(0.5*4*1/6) = 125^(1/3) Now what ...

Logic
Using the law of inference, prove if the below argument is valid. (P1) R -> B (P2) D V R (P3) B /D You may imply all rules of inference to figure out if it is valid.

PHYSICSS.. someone help plz.
A football is kicked at 15 m/s with an angle of 35 degrees with the ground. How long is it in the air? How far will it land? Can someone help plz... Thanks!

PHSYICS HELP PLZZZZ
A football is kicked at 15 m/s with an angle of 35 degrees with the ground. How long is it in the air? How far will it land? Can someone help plz... Thanks!

Physics
A football is kicked at 15 m/s with an angle of 35 degrees with the ground. How long is it in the air? How far will it land? Can someone help plz... Thanks!

Projective Motion Problem
Darryl Strawberry hits a baseball with a horizontal velocity of 45 m/s and a vertical velocity of 25 m/s... Find the time it takes for the ball to travel to the highest point Find the total time the ball is in flight Find the range Find the max height the ball reaches Does it ...

algerbra
find the constant of variation for each direct variation. 10y=13x and f(x)=4.5x and x+y=0

SS
both of them are able to because they are 35 or older and born in america

For many people, the image that comes to mind when they hear, the word slavery is the Transatlantic Slave Trade. I thought of the buying and selling of people, their shipment from one continent to another and the abolition of the trade in the early 1800s. But even if one knew ...

my essay is longer but it won't paste

For many people, the image that comes to mind when they hear, the word slavery is the Transatlantic Slave Trade. We think of the buying and selling of people, their shipment from one continent to another and the abolition of the trade in the early 1800s. Even if we know ...

Can some one check it Choose apiece of literature you have read and describe how it has affected you. For many people, the image that comes to mind when they hear, the word slavery is the Transatlantic Slave Trade. We think of the buying and selling of people, their shipment ...

i would rate you 3 out of 10

college essay help me
can someone check my essay now thanks Choose apiece of literature you have read and describe how it has affected you. For many people, the image that comes to mind when they hear, the word slavery is the Transatlantic Slave Trade. We think of the buying and selling of people, ...

Chem
Ok, so I have DeltaHrxn=(X+90)-(143+90). How do you calculate the enthalpy of O2 (X above) when it is not given to you. Am I even doing that right?

Chem
Change in enthalpy problem. Consider the reaction represented below. Referring to the data in the table below, calculate the standard enthalpy change for the reaction at 25 degrees C. O3(g)+NO(g)-->O2(g)+NO2(g) Standard enthalpy of formation in kJ/mol: O3(g) 143 NO(g) 90 ...

Economics
I have to discuss the growth of modern technology's impact on transaction costs. What points do you think I should discuss?

Economics
When it comes to economic decision making, I have to discuss the importance of transaction costs. Any ideas of the main points I should discuss?

music
how many beats in a bar

Physics Problems
What is the solution?

Chemistry
The equilibrium constant for the reaction of bromine and chlorine to form bromine chloride under certain conditions is 4.7x10-2. Cl2(g) + Br2(g) --> 2BrCl(g) K= 4.7 x 10-2 What is the equilibrium constant for the following reaction under the same conditions? 1/2 Cl2(g) + 1/...

Chemistry
Thanks, that's what I got :)

Chemistry
A container initially has 0.0186 M ammonia at a certain temperature. When the system reaches equilibrium the concentration of ammonia is 0.0035 M. Calculate Kc for the following reaction as written. N2(g) + 3H2(g) --> 2NH3(g)

Math-word problem
How much work does a 120 pound boy do in climbing to the top of the Washington Monument, a climb of 550 feet? If the climb in problem 2 takes 20 minutes, what is the average horsepower produced by the boy?

Math-word problem
The head of a round piston has a pressure of 210 psi pushing down on it. The piston is 3 inches in diameter. What is the force pushing the piston down?

Math-word problem
A 3000 POUND CAR IS PUSHED 500 FEET BY THREE BOYS, A FORCE OF 60 POUNDS IS REQUIRED TO MOVE THE CAR. HOW MUCH WORK DID THE BOYS ACCOMPLISH? HOW MUCH WORK CAN EACH BOY CLAIM IF HE DID HIS SHARE?

GENETICS
With regard to pattern baldness in humans (a sex-influenced trait) a woman who is not bacld but mother is bald, has children with a bald man whose father is not bald. what are their probabilities of having the following types of families? a) their first child will not become ...

chemistry
Tungsten has been used to make light bulb filaments since 1908. The melting point of tungsten is 3422 °C and the heat of fusion is 35 kJ/mole. Calculate the entropy change associated with the melting of one mole of tungsten.

English
Trying to help with 6th grade homework. All I know is the assignment is to write mirror adjective words? Not sure what this means, any suggestions?

Calculus
So there is no way profit = price x quantity demanded because I have q=-60p+950 and Revenue or profit=-60p^2+950p. I then have to find out the profit made by selling things at 5.50, 10 , and 15 dollars. I was told to plug these numbers into -60p^2+950p to get the profit and ...

Calculus
So there is no way profit = price x quantity demanded because I have q=-60p+950 and Revenue or profit=-60p^2+950p. I then have to find out the profit made by selling things at 5.50, 10 , and 15 dollars. I was told to plug these numbers into -60p^2+950p to get the profit and ...

Calculus
I have a project and part of it has to do with revenue, demand and profit. I know that Revenue=price x quantity but can profit equal price x quantity demanded? I have both written down and I am getting confused because I was supposed to find the profit but I have the revenue ...

Brit Lit.
If anyone can help I need a iambic pentameter (10 syllables per line with 30 lines)we have to write it in 3rd person and it has to be about a student, busdriver, teacher, Janitor doesnt matter what one of those 4 examples.

thanks =)

so I don't have to do any Permutations right? just a simple Pr(E)=n(E)/n(S)

Photography - Two men and a woman are lined up to have their picture taken. If they are arranged at random, what is the probability that (A) the woman will be on the left in the picture? (B) the woman will be in the middle in the picture?

math
i am confused with this question. what do i need to use in order to solve this question? eliza must fence in a pool area net to a concession stand with 25 m of fencing? what was the dimensions which will maximize the pool area?

Chemistry
1) Yes, Cl2 is definitely produced, we could see it, it stung our noses and we tested the gas. I know it's annoying, but please help! 2)Thank you!

Chemistry
Two questions: 1) NaCl+H2SO4+NH3=Cl2+? 2) KF+AgNO3+NH3=? I've been agonising over these for the past few hours, but can't seem to make any headway. Please help.

algebra
solve the system by graphing x+y=4 y=2x+1 I think these are the kind that you take equation #1 and rewrite it as y = -x + 4 and do the table for it plot the dots and connect the line for it. then take equation #2 y= 2x+ 1 do the table and do the same and if the lines cross if ...

algebra
what is the ratio of the circumfrence and diameter of any circle? pi, which is 3.14159...

MATH, HELP

MATH, HELP
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MATH, HELP
test

Chemistry
What happens to pressure when you increase the temperature Of a gas? PV=nRT if volume is constant, increasing the right side has to increase the left side. Pressure is directly related to absolute temperature, given volume is constant. Isn't this Charles' Law?

Physics
A tennis ball is a hollow sphere with a thin wall. It is set rolling without slipping at 4.07 m/s on a horizontal section of a track. It rolls around the inside of a vertical circular loop 90.0 cm in diameter and finally leaves the track at a point 20.0 cm below the horizontal...

Chemistry
Only a chemist can be trusted with the combination to the safe containing a ton of money. The combination is the pH of solution A, followed by the pH of solution C. (for example: is the pH of solution A is 3.47 and the pH of solution C is 8.15 the combination to the safe is 3-...

When we are given an expression for the Short Run Total Cost Curve (for eg: 8 + 3Q - 1.5Q^2 + 0.25Q^3), how do you derive expressions for the following: 1. Average Fixed Costs 2. Average Viarable Costs Curve 3. Marginal Costs Curve 4. Short Run Supply Curve I also have a ...

math
Is a glass of water equal to 30 grams or 300 grams? http://www.calorie-count.com/forums/post/20619.html A "glass" of water could designate any size. If you mean a cup of water, Lance's answer should be sufficient. I hope this helps a little more. Thanks for asking.

math
Is a glass of water equal to 30 grams or 300 grams? More likely 300 grams. 30 grms would be nearly two tablespoons.

Math
Round 427,685 to the nearest thousand. 428,000

Math
Three cards are drawn from a deck of 52 playing cards and not replaced. Find the probability of the following: a). Getting three jacks b). Getting an ace, a king, and a spade in that order. c). Getting a club, a spade and a heart in that order. d). Getting three clubs. HELP! a...

english
How can I make this better? The prompt is to explain how the author uses narrative voice and characterization to provide social commentary in "The Other Paris" To find story search 2003 AP English Literature and composition free-response questions #2 Mavis Gallant ...

pictures of juliette low
duh! Of course

Comunications
Prescribe solutions for business communication problems. This sounds like the subject of a major paper. In general, most communication problems are solved by telling the truth, being very clear about your objectives, and considering the sensibilities of your audience.

chemistry gas laws
39 Pa for each of 4 blowers; 26 Pa for each of 6

english
how do you write an evaluation? What kind of evaluation are you referring to? Job evaluation? Evaluation of literary work? Or what? If you're referring to a literary evaluation, here's a webpage that may help: http://grammar.ccc.commnet.edu/grammar/composition/review....

Social Studies
Facts about Georgia. How do we persuade peolpe to come to a colony in the early days? Thank you In Georgia, many were in prison in England: They were given a choice to stay in prison or go to the colonies. I have that. What I need to do is create an advertisement on Georgia in...

science
energy needed to change a material from a liquid to a gas... its 3 words Is this for a puzzle? how many letters in each word would help. Try heat of vaporization. 18 letters

2yrs later no answers? I don't get how this is any different than asking a friend for help. I don't think it is plagiarism. I have the book. This is the only reference to MERCOSUR and its in a section labeled "Take it to the Web"... "Do you think ...

chem again
One more question- how do I balance this half-reaction in terms of atoms? MnO4^-(aq) -> MnO2 (s) i can't balance the oxygen I have no idea! Here is how to do it. It isn't the easiest method (there are easier ones) but this covers areas that you need to know. And ...

chem
"The percentage of sodium hydrogen carbonate, NaHCO3, in a powder for stomach upsets is found by titrating .275 M hydrochloric acid. if 15.5 mL of hydrochloric acid is required to react with .500 g of the sample, what is the percentage of sodium hydrogen carbonate in the ...

science
how do i balance this equation: sodium hydroxide reacting with sulfurous acid [1 mol sulfurous acid reacts with 2 moles hydroxide ion] my hydrogens aren't balancing right 2 NaOH + H2SO3 -> Na2SO3 + 2 H2O ah thx, i accidently wrote H3O Why are oxygen tanks and spacesuits...

geography
population of wales Check this site for the population of Wales plus a lot of additional information about this part of the United Kingdom. http://worldatlas.com/webimage/countrys/europe/ukw.htm

chemistry
Assuming the molor mass of paraffin is 280 g/mol, calculate the # of mols of paraffin burned. Then calculate the heat of combustion of paraffin in kJ/mol I don't think I can help you with the information provided. We need an equation (although we can wing that one) but we ...

RE: accounting
When posting a journal entry how would I post the following. March 9 Completed a 7,500 project for a client who must pay within 30 days. March 22 Received 3,500 cash as a partial payment fro the work completed on March 9 Please help immediately thanks Thank you for using the ...

Accounting?
I need to post a journal entry and a trial balance. Can anyone help???

Accounting
I have to prepare a income statement with the following info. I don't understand it. cash 11,360 Accounts Receivable 14,000 office supplies 3,250 land 46,000 office equipment 18,000 accounts payable 8,500 owner investments 84,000 cash withdrawals by owner 2,000 consulting ...

math
Simplify 36x^2 y^4 a^-2 ____________________ 72a x^-1 y ^ means power I answreed this above.

Tickets
Hi all. Be sincere; be brief; be seated. I am from Sierra and learning to write in English, give please true I wrote the following sentence: "Find discount coupons and deals for cheap airline travel tickets at online stores with couponmountain." With best wishes :(, ...

hi guys can you please answer some of these stuff? its for my business case about business philos and strategies.. i need everyones opinions and answers.. here goes: 1. Using the operations system model, describe fully kripy kreme’s production philosophy? How does it ...

ionic or covalent
Citric acid is a moleule with entirely covalent bonds. Covalent componds can dissociate (weakly) into ions in solution, after all water itself dissociates to a small degree. Citric acid is an organic acid; it does dissociate (weakly) however the bonds that hold the hydrogens ...

word problem
A person invests \$7,500 part at 5% and the remainder at 4% simple interest. If the total interest at the end of the first year was \$346.50, find the amount invested at 4%. total interest=346.5=7500*.05 + x*.04 solve for x. ooopsss, I misread the problem. The total amount ...

word problem
A person invests \$7,500 part at 5% and the remainder at 4% simple interest. If the total interest at the end of the first year was \$346.50, find the amount invested at 4%. Let x = amount invested at 5% Let (7500 - x) = amount invested at 4% 0.05x + 0.04(7500 - x) = 346.50 HINT...

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