Sunday
March 29, 2015

Posts by dave


Total # Posts: 671

economics
all of the following can be used to compute profit per unit except: a) price minus avg total cost. b) total profit divided by quantity. c) avg revenue minus avg total cost d) marginal profit minus marginal cost
October 5, 2009

economics
if production displays economies of scale, the long run average cost curve is: a) upward sloping b) above the short run average total cost curve C0 below the long run marginal cost curve d) downward sloping
October 5, 2009

economics
When the price of summer tank tops falls and you buy more because they are relatively less expensive, this is called: a)elasticity effect b) deadweight loss effect c) income effect d) substitution effect
October 5, 2009

economics
When the price of summer tank tops falls and you buy more because they are relatively less expensive, this is called:
October 5, 2009

math again
Yes because if you graph x=4, your line should be vertical and by graphing (4,0), you would get the same answer.
October 4, 2009

science
what are the common place copernicum or ununbium are found in
October 3, 2009

sceince
i want to know what is the common place this element is found in
October 3, 2009

sceince
what are place to find the element ununbium or copernicium
October 3, 2009

MATH
a 5 b 3 c 7 d 38
October 1, 2009

physics
A rugby player runs with the ball directly toward his opponent's goal, along the positive direction of an x axis. He can legally pass the ball to a teammate as long as the ball's velocity relative to the field does not have a positive x component. Suppose the player ...
September 28, 2009

french
thankyou
September 26, 2009

french
Le gouvernement a décidé de programmer à nouveau ces spots sur les chaînes de radio et télé, accompagnés d'autres recommedations.
September 26, 2009

french
does spots mean commercial i have tried dictionaries and online translators none of them know the word
September 26, 2009

Computers
Operator overloading: Array indexing [] – allow for double indexing [][] I'm not sure how to overload the operator[] for double indexing. Please help if you can. Thanks
September 10, 2009

Computers
The test data I'm using is y = 3. I tried using a trace table, but I get back to 2. Not sure how to get an answer in the form x * Z - y. Any help will be much appreciated. Thanks
August 27, 2009

Computers
Show what the final output of this function will be. The answer will be in the form x * Z - y Private Function F(x as Int, y As Int, z as Int) If (y = 1) then Return 2 Else Return x * Z - y + F(x-1,y-1, z) End If End Function
August 27, 2009

Accounting
Determine the amount to be paid within the discount period for purchase with an invoice price of $7,745, subject to credit terms of 2/10, n30. Explain how you reached your answer.
August 2, 2009

Accounting
Discuss the advantages and disadvantages of sole proprietorships, partnerships, and corporations.
August 1, 2009

calculus
Find an equation for (a) the vertical line and (b) the horizontal line through the given point. (-3.14,0)
July 21, 2009

economics
Suppose that the typical snowboarder/skier visiting Mount Unknown ski resort on a typical day would be willing to pay for lifts up the mountain according to the following schedule. (see graph …url below) 1. Why does the WTP schedule slope downward ? 2. Suppose all skiers ...
June 29, 2009

Physics
Millikan's oil drop experiment suspended a charged oil drop in an electric field. By measuring the size of the drop and using the oil's density, the weight of each drop could be calculated. This allowed the charge of each drop to be found, which was always found to be ...
June 18, 2009

Chemistry
Hi! I have another question. So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change. Now i think the formula is DH=DU + PDV so what i did was DH = 1 kcal + 1atm(3.1-1.5) = ...
June 11, 2009

high school
what?
June 11, 2009

Chemistry
Hi! I have another question. So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change. Now i think the formula is DH=DU + PDV so what i did was DH = 1 kcal + 1atm(3.1-1.5) = ...
June 10, 2009

Chemistry
Hi! I have another question. So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change. Now i think the formula is DH=DU + PDV so what i did was DH = 1 kcal + 1atm(3.1-1.5) = ...
June 10, 2009

Chemistry
sweet thanks GK!
June 10, 2009

Chemistry
A person falls in water at 0 C. After 30 min in the water, he/she suffers from hypothermia, as their body temp drops to 30 C. Since we are water.... we assume the heat capacity is 4.18 J/g/C. 180 Kcal of energy is required to raise the persons temp to 40 C. I need to find the ...
June 10, 2009

Chemistry
Which is the anode and which is the cathode when doing the electrochemistry: Zn or I2/I- Cu or I2/I- Fe or I2/I- Ni or I2/I-
April 26, 2009

Critical Thinking
What is a true, non-subjective, factual claim.
April 21, 2009

critical thinking
what word or phrase shows that a conclusion is up ahead
April 21, 2009

Science
How many Coulombs of charge pass through a 95W amplifier plugged into 110V wall socked over the course of a 2 hour concert?
April 20, 2009

Chemistry-Solubility Product
Why does effervescence when the Group 2 anion precipitate is acidified imply the presence of (CO3)2- ?
April 12, 2009

math
the incompetent bullfighter was by gordan bluddy.
March 30, 2009

math
The acceleration of a particle at a time t moving along the x-axis is give by: a(t) = 4e^(2t). At the instant when t=0, the particle is at the point x=2, moving with velocity v(t)=-2. Find the position of the particle at t=1/2 if you could show me how to get that please
February 23, 2009

spanish
what is wrong with saying llegamos con mi mama en el aeropuerto? should the en el be del?
February 17, 2009

chemistry
a compound made in the first part of an experiment, [Co(NH3)5Cl]Cl2 appeared to be a dark brown/orange/purple color. This product was then used as a reactant to synthesize [Co(NH3)5ONO], which was a red color. how do you account for the differences in color between these two?
February 17, 2009

chemistry
what ions would for from this compound in an aqueous solution? how would i write the equation that forms these ions? [Co(NH3)5Cl]Cl2
February 16, 2009

Physics
Do you go to Connections Academy?
January 27, 2009

9th grade
ms.sue whats the answer?to my question? Thanks,Daves dad
January 7, 2009

9th grade
using only 15 of these letters,tlpuytsiaaganbrnlrog,what do you call a female bug that floats?
January 7, 2009

9th grade sience
what do you call a female bug that floats?
January 7, 2009

math
blank times blank equals 140 what is the two blanks
January 5, 2009

precalculus
show that (-1,1), (9,4), (20,6) and (10,1) are the vertices of a rhombus and then find the area of this rhombus?
December 16, 2008

9th grade : Algebra
how do you solve linears
December 2, 2008

math
lula wants to round 76.24491 to the nearest hundreth. how do you do it?
November 26, 2008

chemistry
2 Cl(g) --> Cl2(g) exo-on H2O(l) --> H2O(g) endo-by 2 H2(g) + O2(g) --> 2 H2O(l) exo-on 2 Li(s) + H2O(l) --> 2 LiOH(aq) + H2(g) endo-by 3 NaN3(s) --> Na3N(s) + 4 N2(g)endo-by
November 16, 2008

math
WHAT IS THE RECIPROCAL OF 5 3/4
November 15, 2008

business
why must a business manage information as a resource?
November 11, 2008

5th grade
draw some quadrilaterals. one fifth is blue. one half is yellow.
October 28, 2008

AP World History
is this good, The Han and Roman Empire were important empires during the time of their existence. The Han Empire began around 206 B.C.E and ended 220 C.E. The Roman Empire began around 27 B.C.E. Throughout their existence, Han China saw technology as an important and ...
October 14, 2008

AP World History
i need help!
October 14, 2008

Math -5th Grade
Using on 3, 11, 21, and 24 only once, and using any combination of divide, multiply, addition, and subtraction, what formula can be created to equal 24?
October 6, 2008

acton high
how do you detect the presence of co2 in a liquid
September 24, 2008

Macroeconomics
Can someone check this for me? 1. Where in the US National Income and Product Accounts and the circular flow of expenditure and income do new home sales appear? ANSWER: I said they appear with money going from the households to the goods and services market. 2. How does a fall...
September 11, 2008

MATH
Suppose that g(X)=f(cx). Show from the definition that g'(x)=cf'(cx)
September 1, 2008

Calculus
Find (fg)'(1) if f(1)=1, g(1)=2,f'(1)=3, g'(1)=-3
August 31, 2008

Axia College
I can not believe the amount of errors on this page with spelling etc. There is no problems getting jobs as long as you know your stuff. People usually gripe about the school because they cant handle not having a teacher around. If you are self-paced and do not need constant ...
August 7, 2008

help math
a partial moves along the x-axis so that its velocity at time t, for 0< = t = < 6, is given by a differentiable function v whose graph is shown above. The velocity is 0 at t=0, t=5, and the graph has horizontal tangents at t=4. the areas of the regions bounded by the t-...
May 20, 2008

calc help
t= hours 0 1 3 4 7 8 9 l(t) people 120 156 176 126 150 80 0 concert tickets went on sale at noon (t=0) and were sold out within 9 hours. the number of people waiting in line to purchase tickets at time t is modeled by a twice-differentiable function L for 0< = 0 < = 9. ...
May 20, 2008

government
Why did the South choose to return to a Confederacy despite the failures of this governmental form in the late 18th Century?
May 14, 2008

math
How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another type? When might you use ...
April 3, 2008

physics/chem
n Fig. 21-41, three identical conducting spheres initially have the following charges: sphere A, 7Q; sphere B, -8Q; and sphere C, 0. Spheres A and B are fixed in place, with a center-to-center separation that is much larger than the spheres. Two experiments are conducted. In ...
March 31, 2008

physics/chem
(a) What equal positive charges (in Coulombs) would have to be placed on two celestial objects with masses 9.40 x 1027 and 1.99 x 1022 kg to neutralize their gravitational attraction? (b) What mass of hydrogen would be needed to provide the positive charge calculated in (a)? I...
March 31, 2008

physics/chem
Calculate the number of coulombs of positive charge in 261 cm3 of (neutral) water. (Hint: A hydrogen atom contains one proton; an oxygen atom contains eight protons.)
March 31, 2008

geography
Thanks for all the help. I realize this isn't a site for doing other's homework, but this is not for the purpose of a homework assignment, but for creating a map of East Asia. I am merely trying to source outside help due to time constraints.
March 26, 2008

geography
Also the principal roadways; airports, harbors; and railroads in each region would be very helpful too.
March 26, 2008

geography
Need to know the principal rivers, mountains, and bodies of salt and fresh waters within and around China, Taiwan, Japan, North and South Korea. Thanks.
March 26, 2008

science
Describe (with calculations) how you prepare 1.00 L of 0.750 M barium hydroxide solution starting with Solid barium hydroxide
March 8, 2008

English
chameleon,
February 28, 2008

Health Project
Could someone help me find a medical supply company presentation which involves information about the products, jobs, services, etc available. I would greatly appreciate that!! Thanks
February 17, 2008

Access Database - computers
I have to make a database to track university apartments in access. I am stuck trying to decide what type of tables and field names i should have. would it make sense to have a table for students including first, last names, address, city, postal code, telephone number table ...
February 10, 2008

Physics
why is the initial speed down equal to 0?
February 8, 2008

Chemistry
don't forget when finding the mass for the volume equation you must add the mass of your solute, citric acid. once you find the total mass, then divide by the density to give you the total volume. Then moles of citric acid divided by your total volume gives you the ...
February 7, 2008

math
how do you find the reference angle of csc,sec, cot? for example: csc theta= 2 times square root of 3 / 2
February 4, 2008

chemistry
The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 300C , the total pressure is 980 mm Hg. The vapor pressure of ethanol at the new temperature is...
February 4, 2008

chemistry
When a student plotted ln [vapor pressure of a gas] vs. inverse Kelvin temperature, she obtained a straight line with a slope equal to -9.500 x 10^3 K. According to the Clausius Clapeyron equation, Hvap is kJ/mol.
February 4, 2008

Microecon
If you are given this function: P=1000-40Q where P=price and Q=sales..... How do you get the price elasticity of demand at a price that is $500? At what price, if any is the price elasticity of demand equal to one?
January 23, 2008

English
It takes someone with a really big heart to give to our charity, and you seem like someone who cares more than most
January 21, 2008

algebra
well i redid it and i got this: = x^2 + 4x + 4 - 2x - 4 - 2^2 - 4 / 2 = x^2 + 2x / x divide the x and i get "x+2" is it correct??
January 13, 2008

algebra
wait, i mistyped. it should be: if f(x) = x^2 - 2x, find f(x+2) - f(2) / x divided by x, not 2. sorry...
January 13, 2008

algebra
if f(x) = x^2 - 2x, find f(x+2) - f(2) / 2 the answer is: x+2 but l got: x^2 - 2x - 8 = 0 which is x = 4 or x = -2
January 13, 2008

geography
Sammy goes out to play. His Mother tells him to be home by 5:00. Sammy is almost an hour late, but he has an excuse. He says that he got lost. He tells his mother that when he checked his compasd, it was pointing to the west, so he followed a path in that direction, but still ...
November 28, 2007

Math For Business
A man has decided to invest at most $90,000 in securities in the form of corporate stocks. He has three options: blue chip stocks he assumes will yield a 6% return, growth stocks @ 12%, and speculative stocks @ 20%. No more than 25% of his investment should be in growth and ...
November 19, 2007

English rhymes/riddles
small parts of wild plants
November 15, 2007

Calculus
find the equation of a line tangent to the graph of y = x / (square root of 5x^s +4), at x = 1. am i suppose to take the derivative? if so, then what else?
November 13, 2007

American History
thanks but i'm still lost...
November 11, 2007

American History
Hi, I need help on answering this question: To what extent did foreign affairs shape American domestic politics in the 1790s? -- I know about the competing visions between Hamilton and Jefferson as well as the British and the French... But i'm lost. i don't know which ...
November 11, 2007

calculus : related rates
a balloon rises at a rate of 3 meters per second from a point on the ground 30 meters from an observer. find the rate of change of the angle of elevation of the balloon from the observer when the balloon is 30 meters above the ground... so i drew a small picture depicting it ...
November 5, 2007

crt 205
Wishful Thinking
October 28, 2007

algebra
how do I work this? (-4x^12y^7)^2 (2x^-3y^-2)^2 divided by (5x^-3y^10)^-1 i need step by step help
October 14, 2007

algebra
how do you get that answer???
October 14, 2007

algebra
(2x^2y^-4z^-5)^3 How is the answer 8x^6 _____ y^12z^15
October 14, 2007

Science
What is the mathematical calculations that lead to the theory of Dark matter or Dark energy? What is the calculation for energy in the universe? What is the calculation for matter in the universe? What is the discrepancy between the two calculations? Please note that we don&#...
June 25, 2007

Science
Prior to the detonation of the first atomic bomb, had the scientist been able to prove by theory that the reaction would stop? I assume they did considering they continued with the test. If not, how was Bethe able to calculate the yield of the explosion? It stops because the ...
June 25, 2007

physcial science
Why is a nail attracted to either pole of a magnet, but another magnet is attracted to only one of the poles? Did you post this twice? Please review my answer posted yesterday It looks like my answer to this same question by "jan" did not get posted. It was related ...
June 25, 2007

physcial science
Does a light bulb glow because.... a) there is burning inside b) an electric current glows c) the filament is hot d) a very small current is flowing Wouldn't you think it was because the filament was hot? Of course, a very small current also CAN make a filament hot if the ...
June 25, 2007

physcial science
Does a 5000-watt heater use twice the energy of a 2500-watt heater. What calculation do I need to do to compare these and answer the question? It does while it is on. But if it is controlled by a thermostat, it needs to be on only half as long to maintain the same temperature...
June 25, 2007

physcial science
How do I calculate the orbital velocity of a satellite that is 400 miles above the earth? Set the centripetal acceleration V^2/(R+h) equal to the gravitational acceleration, g * [R/(R+h)]^2 Then solve for V R is the earth's radius and h is the 400 mile height. g is the ...
June 25, 2007

Economics
If Mary takes money from her savings account and buys a T-bond from Jody with that money, it's: A. An expansionary fiscal policy. B. An example of contractionary monetary policy. C. An example of expansionary monetary policy D. An example of neutral (neither expansionary ...
June 24, 2007

physcial science
When a thermometer is placed in a beaker of hot water, WHY does the mercury level DROP, then rise? See my answer below to the same question.
June 22, 2007

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