Wednesday
October 1, 2014

Posts by kim


Total # Posts: 2,090

chemistry
plan and design an experiment which would allow you to find the percentage by mass of copper in a sample of impure copper
March 27, 2011

Chemistry
A chemist mixes 100ml of H2O at 30 degrees Celsius and 56.0g of CaOin a calorimeter. The following reaction occurs" CaO(s) +H2O(l)--->Ca(OH)2(s) ΔH= -16.0 kcal/mol The heat capacity Ca(OH)2(s) is 19.2 cal/mol*degreeCelsius and the heat of vaporization of water is ...
March 27, 2011

statistics
An auditor of Health Maintenance Services reports 40 percent of policyholders 55 years and older submit a claim during the year. Fifteen policyholders are selected at random for company records. a)how many of the policyholders would you expect to have filed a claim within the ...
March 26, 2011

statistics
A study of checkout lines at the Safeway revealed that between 4-7pm on weekdays there is an average of 4 customers waiting in line. What is the probability that you visit that Safeway during this time period and... 1-no customers are waiting in line? 2-Four customers are ...
March 26, 2011

Managerial Economics
Are organizations more risk adverse or individuals more risk adverse? Is one more risk tolerant? Use economic theory to explain your position.
March 24, 2011

math
a rectangle is 7 ft by 9ft. a second is similar to the first with a perimeter of 260 ft. what are the dimensions of the second rectangle?
March 23, 2011

Pre Calculus
Find the measure of the central angle, in radians, given the area of the sector as 22.6 cm2 and a radius equal to 3.7 cm. Round your answer to the nearest tenth.
March 23, 2011

PROBABILITY
There are 100 patients in a hospital with a certain disease. Of these, 10 are selected to undergo a drug treatment that increases the percentage cured rate from 50 percent to 75 percent. What is the probability that the patient received a drug treatment if the patient is known...
March 23, 2011

Pre Calculus
Verify the identity: cos x + sin x tan x = sec x.
March 23, 2011

accounting
$36,000 PAYABLE AT THE END OF THE SEVENTH, EIGHT, NINTH, AND TENTH PERIODS AT 12%
March 21, 2011

Us History
whichever side has more facts to show that you know the stuff. The person grading it isn't looking at you opinion, but at the facts you have & how you've analyzed them. :)
March 21, 2011

Chemistry
A mixture of ethyne gas (C2H2) and methane gas (CH4) occupied a certain volume at a total pressure of 16.8 kPa. When the sample burned, the products were CO2 gas and H2O vapor. The CO2 was collected and its pressure found to be 25.2 kPa in the same volume and same temperature ...
March 21, 2011

Science
Need help with constructing a model of radioactive decay with popcorn kernals
March 20, 2011

algebra
Lisa studies 8 hrs. for a particular test and gets a score of 78. at this rate how many hours would she have to study to get a score of 98?
March 19, 2011

english
Do you think that films, in general, influence society or does society influence what is presented in films?
March 18, 2011

sociology
How can the three sociological perspectives (e.g., social functionalism, social conflict, and symbolic interaction) be used to conceptually understand multiculturalism?
March 15, 2011

Early childhood
School-age children generally develop writing skills in which sequence? A.Expressive writing,expository writing,story B.Exposity writing,story writing,expressive writing. C.Expressive writing,story writing,expository. Story writing,expository writing,expressive writing
March 15, 2011

math college
POST YOUR QUESTIONS AT ww w.ac eyou rcoll egec las sses . c o m
March 14, 2011

science
how many half-lives have passed if 87.5% of a substance has decomposed? how many if 99.999% has decomposed?
March 14, 2011

math
POST YOUR QUESTIONS AT ww w.ac eyou rcoll egec las sses . c o m
March 9, 2011

statistic
Given a normal population with ì = 40 and ó = 8, what is the probability of obtaining a sample mean between 39 and 41 for a sample of n = 16 scores?
March 9, 2011

English
POST YOUR QUESTIONS AT ww w.ac eyou rcoll egec las sses . c o m
March 8, 2011

algebra
write an equation for the line parallel to the x axis through the point 7,2
March 8, 2011

statistics
POST YOUR QUESTIONS AT ww w.ac eyou rcoll egec las sses . c o m
March 6, 2011

Advance Finance
The Howland Carpet Company has grown rapidly during the past 5 years. Recently, its commercial bank urged the company to consider increasing its permanent financing. Its bank loan under a line of credit has risen to $250,000, carrying an 8 percent interest rate. Howland has ...
March 6, 2011

helppppp :)
more than 7 points plzzzzz
March 1, 2011

helppppp :)
how can we help african people who is having a hard time with poverty? :)
March 1, 2011

constellations;)
could you tell me the story of aries?? i wantta knoww^^
February 28, 2011

chemistry
pH=11.1, so pOH is 14-11.1=2.9
February 26, 2011

reimbursement methodology
Differentiate between the official coding guidelines for using V codes in an inpatient and outpatient settong
February 23, 2011

home economics
compute the price elasticity of demand for paint and show calculations? If a gallon of paint went from 3.00 to 3.50 a gallon and the usage of paint drops from 35 gallons a month to 20 gallons a month.
February 20, 2011

mathh help plzzz
the perimeter of a rectangle is 3.5 times the legth. the width is 2.5cm less than the legth. what is the width?
February 20, 2011

science check plzzzzzzzzzz
if your computer uses 2.5A at 120V, how much will it cost to use the computer for 4 hours a day, seven days a week for two weeks? assume that the cost of electricity is $0.09 for every kWh*h of energy. i solved it like this way could you check of i got it right plzzz?? (C= E* ...
February 17, 2011

science check plzzzzzzzzzz
if your computer uses 2.5A at 120V, how much will it cost to use the computer for 4 hours a day, seven days a week for two weeks? assume that the cost of electricity is $0.09 for every kWh*h of energy. i solved it like this way could you check of i got it right plzzz?? (C= E* ...
February 17, 2011

science check plzzzzzzzzzz
if your computer uses 2.5A at 120V, how much will it cost to use the computer for 4 hours a day, seven days a week for two weeks? assume that the cost of electricity is $0.09 for every kWh*h of energy. i solved it like this way could you check of i got it right plzzz?? (C= E* ...
February 16, 2011

maths
maximise p=15x+10y
February 16, 2011

math
candie since u r ask to find the y coordinates then the coordinates given must be x so substitute the x values in the equation and solve example.place -9 for x annd solve u will get the frist y coordinate then -3 then 6 ok
February 16, 2011

math
maximise p=15x+10y
February 16, 2011

math
a negative + a negative =a negative answer ex.-+-=- -x-=+ -x+=- so -25+(-16)= -25-16=-41
February 16, 2011

alg
9x +5y=34 8x-2y=-2 solve by elimination
February 15, 2011

alg
9x +5y=34 8x-2y=-2 solve by elimination
February 15, 2011

STATISTICS
Private colleges and universities rely on money contributed by individuals and corporations for their operating expenses. Much of this money is put into a fund called an endowment, and the college spends only the interest earned by the fund. A recent survey of eight private ...
February 15, 2011

math
A student planning her curriculum for the upcoming year must select one of four business courses, one of four mathematics courses, two of ten elective courses, and either one of four history courses or one of four social science courses. How many different curricula are ...
February 14, 2011

international business
what effect might the economics socioeconomic forces wthin south korea have on a products potential
February 14, 2011

Economics
i also agree
February 14, 2011

geometry
If AB is opposite AC and AC is opposite AD , what can you conclude? Explain.
February 14, 2011

helpppppp
what role do insulators play in preventing electric shock?
February 14, 2011

helpppp science 7
what role do insulators play in preventing electric shock?
February 13, 2011

helpppp science 7
what role do insulators play in preventing electric shock?
February 13, 2011

fin 200
i am really confused on what numbers to use to get the calculations on the 13 ratios
February 10, 2011

fin 200
using the financial statements for the goodyear calendar company calulate the 13 basic ratios
February 10, 2011

chemistry
A 20.2g chunk of magnesium metal reacts with 13.7 g of oxygen gas to make magnesium oxide. Write the balance equation.
February 9, 2011

Science/ Physics
An airplane is traveling km/h in a direction 41.5 degrees west of north. (a) find the cmpopnets of the velocity in the northerly and westerly directions. (b) How far north and how far west has the plane traveled after 3.00 h?
February 9, 2011

english
can u find the climatic sentences in the poem Africa by David Diop
February 9, 2011

management information system
Thanks Ms. Sue
February 8, 2011

management information system
Is spyware ethical? why or why not?
February 8, 2011

chemistry Please Help Dr.BOB
Complete hydrolysis of 25 mM ethyl acetate in an enzyme (i.e., esterase)-catalyzed reaction is carried out in a 40 mM NaCl solution buffered by 0.2 M Tris-Cl, pH 9.1. What is the pH at the end of the reaction? (For Tris base, which is the abbreviation for Tris (hydroxymethyl) ...
February 7, 2011

Calculus
.00092
February 6, 2011

algebra
The length of the side of a rectagular desk is given by 9x-2y cm. The length of the front is given by 9x+2ycm. What is an algebriac expression for the area of the top of the rectangular desk? Including correct units
February 3, 2011

algebra
(x^8+8)(x^9-^2)
February 1, 2011

algebra
convert decimal notation 5.166x10-^8
February 1, 2011

Algebra
(4x^6)(-3x^9)(6x^7)
February 1, 2011

3rd grade math hw help!
How can I do 5 1/4 line segment
January 31, 2011

Physics
Two charged particles exert an electrostatic force of 8 N on each other. What will the magnitude of the electrostatic force be if the distance between the two charges is REDUCED to one-third of the original distance? Would you just have to multiply 8 by 9?
January 31, 2011

3rd grade math
Thanks for the suggestion. I think my son got the idea on what to do.
January 30, 2011

3rd grade math
What patterns help you divide? DRaw a picture or make a chart to show how to divide 1600 by 4. Give the quotient. We know the answer but having trouble to make a chart to show the outcome. Please help. Thanks in advance
January 30, 2011

chemistry
What is the number of grams of a solute for a 3L of a 2.5 M HCl solution???
January 26, 2011

chemistry
What is the number of grams of a solute for a 3L of a 2.5 M HCl solution???
January 26, 2011

chemistry
what is the molarity of a solution when you ha 2mole of ammonium chloride (AgNo3) in 1L?
January 26, 2011

Intermediate Accounting
I am having a hard time calculating this my question is On April 1, 2011, the company paid an insurance company $4,000 for a two-year fire insurance policy. The entire $4,000 was debited to insurance expense. How do I calculate?
January 25, 2011

statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The general population of ...
January 24, 2011

statistics
For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3.
January 24, 2011

reimbursment methologies
when coding late effects, the code for the what is usually sequenced first
January 24, 2011

math
To make 5 sets of curtains, when each set requires 2'1/3 yards, how many of material are needed ?
January 18, 2011

physics
A 15kg model plane flies horizontally at a constant speed of 12.5 m/s and the kinetic energy is 1171J and the potential energy is 3000J what is the new horizontal velocity? Please show work and explain.
January 17, 2011

Business
I am trying to write a 1500 words review of two articles that are discussing ethical perspectives or business ethics for two countries. Each article must contain info. on a different foreign country on a different continent; for example, if the first article you select ...
January 16, 2011

Chemistry Lab
Penicillin is an important antibiotic isolated from a type of mold. If you have 0.0468 g Penicillin, C14H20N2SO4MW = 31239 gmol , answer the following questions. A. How many moles of Penicillin do you have? B. What is the number of moles of nitrogen that are present? C. What ...
January 11, 2011

math
how to mixed #s or whole #s 18/7
January 11, 2011

Science
Which of the following are involved in the clotting process? 1. platelets 2. neutrophils 3. fibrinogen
January 10, 2011

Science
Improper functioning or regulation of which of the following might lead to poor regulation of the membrane permeability? 1. albumin 2. fibrinogen 3. platelets 4. lymphocytes 5. chloride ion levels
January 10, 2011

language
What is the adjective for the question, Some hawk's eyes are yellow.
January 6, 2011

Math
you use a rectangular piece of cardboard 20 in by 30 to construct a box. you square the sides x in. from each corner of the piece of cardboard and then fold up the sides to form the bottom. A. write a function A to represent the area of the base of the box in terms of x. B. ...
January 4, 2011

MATH PRE-ALGEBRA
yes! if it is addition or subtraction you have an open dot! if it multiplication or division than a closed dot!
January 3, 2011

Algebra
factor trinomial This is what I have so far dont know where to go from here 4h^2 + 8h - 5 (4h^2-2h) + (10h-5) 2h(h-5) + -5(2h-1) cant figure out what to do next
January 1, 2011

Algebra
I checked it and that is how it is on the worksheet I couldn't get it to work out either
January 1, 2011

Math
2 4/7
December 29, 2010

us history
what are the similarties and differences of philosophies in the Articals of confederation and the constitution
December 28, 2010

geology
... Refer to Figure 9.21 on p. 264 of the text. How would you determine the slope of the land surface in this figure?
December 27, 2010

Chemistry
I converted 22 min into second -lnx= 4.17E-4 *1320seconds -ln100 lnx=4.0547 x=E^4.0547 x=57.67 100-57.67=42.33%
December 25, 2010

Chemistry
The K comes from dividing it by 212seconds
December 25, 2010

Chemistry
k- 4.17E-4 A-ln100/27)/4.17E-4 t=52min B= (ln100/x)=4.17E-4*22 lnx=4.0547 e^94.0547)=57.667 100-57.667 =42% Thank you
December 25, 2010

Chemistry
The decomposition of ehtane, C_2H_6, is a first-order reaction. It is found that it takes 212seconds to decompose 0.00839M C_2H_6 to 0.00768M. A. How long in minutes will it take to decompose ethane so that 27% remain B. What percentage of ethane is decomposed after 22minutes?
December 25, 2010

Chemitry
Thank you
December 25, 2010

Chemitry
I understand how to get the Constant but I don't get how you know that it is a 17% increase?
December 25, 2010

Chemitry
If he activation energy of a reaction is 4.86Kj, then waht is the percent increase in the rate constant of a raction when the temperature is increased from 45 to 75C
December 25, 2010

math
If you add 9 to me and then subtract 6, you get 7. What am I?
December 21, 2010

stastics
I'm having a hard time with question, can someone help me? A random sample of medical files is used to estimate the proportion p of all people who have blood type B. If you have no preliminary estimate for p, how many medical files should you include in a random sample in ...
December 19, 2010

statistics
Finish times (to the nearest hour) for 59 dogsled teams are shown below. Draw a histogram. Use five classes. 261 269 236 244 280 296 284 297 290 290 247 256 338 360 341 333 261 267 287 296 313 311 309 309 299 303 277 283 304 305 286 290 286 287 297 299 332 330 309 326 309 326 ...
December 19, 2010

science
The average solar radiation incident on the surface of the earth is about 1 KW/m2 for the entire year. A solar house is built with solar panels installed in the roof to provide the heating and electrical energy of the house. If the roof has a surface area of 100 m2 and the ...
December 12, 2010

soc 120
1 32
December 12, 2010

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