Saturday
April 19, 2014

Posts by jason


Total # Posts: 1,061

Math
1)Write a quadratic equation with integer coefficients that has -4+7i(Radical 3) and -4-7i(Radical 3) as its roots. 2) Solve your answer to part 1 using the quadratic formula verifying your answer

pre cal
solve for x: x^(2/3)=(1/27) (2^(x)+4)/(2^x)=2 explain please

physics
a crane drops a .3 kg steel ball onto a steel plate. the ball's speeds just before impact and after are 4.5 m/s and 4.2 m/s respectively. If the ball is in contact with the plate for .03 s, what is the magnitude of the average force that the ball exerts on the plate during...

chem
which of the following could be used to dissolve a carboxylic acid into the aqueous phase? a)MgSO4 b)1.5 M HCl c)1.0 M NaHCO3 d)2.0 M Na2SO4 e)saturated NaCl I'm leaning towards choice e because you can have an aqueous solution of sodium salt and a carboxylic acid.

English
What does Martin Luther King mean by "Continue to work with the faith that unearned suffering is redemptive?"

central america & the caribbean
yea ok kool,

central america & the caribbean
aight then thanx

central america & the caribbean
word bank : belize,costa rica ,coffee, cuba,honduras,lead,mestizos,multicultural,oil,panama canal,puerto rico,rice,sugar cane, slavery,canal 2.___was introduced in the caribbean after indians died from european diseases. 3.central america is an ___between north and south ameri...

CHEMISTRY
Observations Mass of Fe metal:100 MG Volume of water in Calorimeter: 100 ML Mass of water in Calorimeter (use 1g per ml): 100G Initial Temperature of metal: 20 Initial Temperature of water: 20 Final Temperature (both metal and water): 100 Determine the heat gained by the water...

English- vocab
can you please help me figure out a word that means something that happens for no reason and we dont know the reason why it happens. i dont think its mystery, I'm not sure.

chem
Would you expect 2-chlorobutane to react faster or slower than 2-bromobutane under Sn1 conditions? Sn2 conditions?

chem
would you expect 2-chlorobutane to react faster or slower than 2-bromobutane under sn1 conditions? sn2 conditions? - would it slower because of the stronger bond? and it would be sn2 reaction? i'm i on the right track?

chem
List the experimental conditions that favor Sn1 reactions, and those that favor Sn2 reactions.

chem
(R)-(+)- limonene has a boiling point of 176 C. What made it possible to steam distill it at 100C? - is it because you could have different weights of each one?

Chem
How would you expect the following series of compounds to compare in behavior in teh two tests(SN1 vs. SN2)? CH3CH=CHCH2Br (1-bromo-2-butene) CH3-C=CHCH3 l Br CH3CH2CH2Br (1-bromopropane) I know primary alkyl halides like 1-bromopropane favor SN2 reactions and tertiary alkyl h...

math
Using the table (ADBC)= 8 (DACB)=5 (BADC)=3 (BDCA)=1 (DCAB)=2 (it is supposed to be a table but the table won't paste correctly). Deter mine: a) deter mine the winner using the Borda count b) deter mine the winner using the Hare method? What round did you find an answer? E...

math
Sorry that did not come out good. Let me try again. In voting of 4 candidates, the outcomes are recorded as: (ADBC)=8 (DACB)=5 (BADC)=3 (BDCA)=1 and (DCAB)=2. It is supposed to be a table but it didn't copy. Using this table, determine: a)what is the total number of votes ...

math
(ADBC) (DACB) (BADC) (BDCA) (DCAB) 8 5 3 1 2 Using that table, determine: a) the total number of votes b) what does (ADBC) mean c) What the "8" mean d)how many votes will be necessary for a majority, why? is a)19 b) rank c) the number of votes d)?

chem
An optical rotation study gives a result of alpha=+140 degrees. Suggest a dilution experiment to test whether the result is indeed +140 degrees, and not -220 degrees. -could polarimetry experiment be used to find the r and s isomer?

Chem
A sample of 2-butanol has a specific rotation of 3.25. Determine the % ee and molecular composition of this sample. The sepcific rotation of pure (+)-2-butanol is +13.0. is it (3.25/13.0)x100%= 25%... i'm a little confused on the molecular composition though.

Chem
What determines whether 2-bromobutane undergoes an Sn1 or an Sn2 reaction how would you favor SN2 formation?

Math
your mom

chemistry
we did an extraction of a mixture between neutral compound fluorene and an unknown carboxylic acid. Diethyl ether was used as the organic solvent while NaOH was used as the aqueous solvent. After extracting the unknown acid we also had to extract the neutral compound and to do...

chemistry
what experimental difficulty would you encounter if you had neglected to include a drying step before evaporating the ether solution of the neutral organic compound? Water was added to the organic solvent ,but a drying agent wasn't added. So would the difficulty be a separ...

chemistry
Calculate the number of grams of reactant left over when 28.35 grams of silver reacts with 50.0 liters of air at STP which is 20.9476 % oxygen by volume. The density of air at STP is 1.292 g/L. attemtp at solution volume of oxygen= .209476*50L=10.5L How do i go from volume of ...

chemistry
Calculate the number of grams of reactant left over when 28.35 grams of silver reacts with 50.0 liters of air at STP which is 20.9476 % oxygen by volume. The density of air at STP is 1.292 g/L. attemt at a solution: m = dv = 64.6 g of air moles silver =28.35/108=0.26 moles of...

chemistry
A sample of acid (C,H,O) massing 1.000 g burns to give 1.466 g of carbon dioxide and 0.6001 g of water. The molecular mass is approximately 120 g/mol. Calculate the molecular formula of the acid

Chem
What experimental difficulty would you encounter if you had neglected to include a drying step before evaporating the ether solution of fluorene?

Chemistry
how do u draw the lewis structure of F3S-SF

Chemistry
What is the geometry of S2O82- its basically two SO4 molecules connected by the O-O bond

chem
A student carried out a simple distillastion on a compound known to boil at 124 C and reported an observed boiling point of 116-117 C. Gas chromatographic analysis of the product showed that the compound was pure, and a calibration of the thermometer indicated that it was accu...

chem
why would it be dangerous to heat a liquid in a distillation apparatus that had no vent or opening to the laboratory? - is this because the liquid will create vapor pressure and could cause a serious injury to a student?

chem
why do we add boiling chips or boiling stones before the distillation starts? Boiling chips should never be added to a hot solution!Why? i don't know what the answer is to the first one, but as for the second i think i have a clue. is it that the boiling chips will start a...

Math
Okay tell me if thease lines are parallel, perpendicular or neither. y=3x-2 y=1/3x+2

algebra
u solve the equation and the point should be the the end of the solution.

chem
Thank you soo much for all of your help!!!

chem
K2CO3 is an excellent drying agent for some classes of organic compounds. would it be a better choice for an acid (RCO2H)or an amine(RNH2)? why? i know this is RNH2. could it be explained that potassium carbonate itself is basic so it will make water and a salt if mixed with a...

chem
what precautions should be observed when an aqueous sodium carbonate solution is used to extract an organic solution containing traces of acid? is it that aqueous sodium carbonate is extremely combustible, which can't be exposed to an open flame?

chem
what precautions should be observed when an aqueous sodium carbonate solution is used to extract an organic solution containing traces of acid? is it that aqueous sodium carbonate is extremely combustible, which can't be exposed to an open flame?

chem
a crude non acidic product mixture dissolved in diethyl ether contains acetic acid. describe an extraction procedure that could be used to remove the acetic acid.

physics
the period of a comet is 100 years. At ists closest approach(perihelion), it is 0.37 AU from the sun. What is the semi-major axis of the comet's orbit? How for does it get from the sun(what is its aphelion distance)?

physics
a 9.9*10^23 kg planet orbits a star in a circular orbit. The planet is 5.6 AU away from the star and has an orbital velocity of 32 km/s. What is the mass of the star. (1AU = 1.496*10^11m)

physics
The sun rotates around the center of the milky way galaxy at a distance of about 30,000 light years (1ly= 9.5*10^15m). if it takes about 200 million years to make one rotation, estimate the mass of our galaxy. Assume that the mass distribution of galaxy is concentrated mostly ...

Vocabularay
First of all, look at the definition in the dictionary: Main Entry: van·guard Pronunciation: 'van-"gärd also 'va[ng]- Function: noun Etymology: Middle English vantgard, from Middle French avant-garde, from Old French, from avant- fore- (from avant befo...

vocabulary
I dont understand the definition? i was asking for an example...

vocabulary
how do u use vanguard in a sentence?

Vocab
Does: Ger taut smile revealted the highg levels of stress she went through today make sense? for taut?

Vocab
Is she suddenly veered off the road to avoid a deer make sense?

Vocab
How do u use veer in a sentence?

Math - 9th grade
A company has a 22% profit margin, and has employee fraud of $220,000. Calculate the additional revenue to offset the lost income. Thanks.

Math
Thanks Damon. My computation was ($1,400,000 * 0.20) + ($1,400,000) = $1680000

Math
You are told that a company has a 20% profit margin, and the discovered fraud has caused $1,400,000 more needed revenue to cover the fraud. how much was stolen?

chem
Thanks alot. yeah I was a little confused as to which was more polar.

chem
The Rf value of compound A is .34 when the TLC plate is developed in hexane and .44 when the plate is developed in diethyl ether. Compound B has an Rf value of .42 in hexane and .60 in diethyl ether. Which solvent would be better for seperating a mixture of compounds A and B b...

chem
why does the addition of a salt (like sodium chloride) to the aqueous layer sometimes help break up an emulsion that forms in an extraction? - sorry about that last post

chem
when two layers form during an ether/water extraction, what would be an easy, convenient way to tell which layer is which if the densities were not available?

chem
well if it is wet then the solution will contain some impurities from the water or which ever other compound is added to the solution.

chem
what are some of the factors that affect melting point besides, impurities, pressure, and having a wet solution?

chem
Explain why ethanol and acetone are not suitable solvents for extracting organic compounds from aqueous solutions. does it have to do with their density?

Chem
so it would be lower right?

Chem
In the previous experiment, you recrystallized salicylic acid. If you were askedto take melting point of your crystals, would it be necessary to dry the salicylicacid crystals thoroughly first? What result would you expect from your melting point determination if you did not d...

6th grademath
this is a word problem:the country of hoffnemath is holding its presidential election this week. there three candidates(a,b,c,) and each eligible voter can vote for two of them. the candidate with the most total votes wins the election. here is a summary of the results: >ha...

chem
what is the typical melting range of a compound? I think .5 to 2.0 C is way tooo low.

chem
A student in 51LA conducts a melting point experiment with an unknown compound and observes a melting range of 122 – 129 °C. Is this a typical range for a melting point? If not, what range would be typical? Well for a pure compund the meliting range is from .5 to 2.0C...

Chem
Thank you. i understand this now.

Chem
the solubility of a compound is 59g per 100 mL in boiling methanol and 30g per 100mL in cold methanol, whereas its solubility in water is 7.2g per 100 mL at 95 C and .22g per 100mL at 2C. Which solvent would be better for recrystallization of the compound? Explain. Well this i...

stoichiometry
confused

English-Symbolism
I need examples of what the Moon has symbolized in literature, history, popular culture, legends, etc. I need to create a paragraph, so ideas will be appreciated.

Short story part 1
WHAT ARE CONVENTIONS?

language arts: reading
which element is especially significant in this passage?

French
ok thanks, I'm sure this'll help ^^

French
ok thanks ^^

French
no, no I'm not... sorry

French
Hey I was in french immersion last year, but now I'm not cuz I moved, and I'm wondering, is there a website so I can catch up on my french so I'll be able to at least UNDERSTAND french? thanks! ~jason~

history
dude, I'm sure you can figure this on out easily, just go to google or wikipedia.

biology
messages from nerve cells go to the ....... ........ ? please help

math
what is the next letter w,s,p,l,h

finance (depreciation)
Depreciation is a source of cash inflow because? A. it is a tax-deductible non-cash expense B. is supplies cash for future asset purchases C. it is a tax-deductible cash expense D. it is a taxable expense My answer is A because depreciation is a tax deductable non-cash expense.

finance (operational efficiency)
The best indication of the operational effiency of management is? A. net income B. earnings per share C. EBIT D. gross profit I like net income as a metric for measuring operational efficiency of management. The amout of money a corporation has after all the bills are paid is ...

finance (bonds vs. perferred stock)
Corporations prefer bonds to preferred stock for financing their operations because A. preferred stocks require a dividend B. bond interest rates change with the economy while stock dividends remain constant C. the after-tax cost of debt is less than the cost of preferred stoc...

finance (risk premium)
The risk premium is likely to be highest for? A. U.S. government bonds B. corporate bonds C. gold mining expedition D. either B or C I like C. I think th risk premium the rate added to the risk free rate would be highest for a gold mining expedition.

finance (assumptions)
The cost of capital for common stock is ke=(D1/Po)+g. What are the assumptions of the model? A. growth (g) is constant to infinity B. the price earnings ration stays the same C. the firm must pay a dividend to use this model D. all of the above are assumptions of the model The...

finance (total asset turnover)
Total asset turnover indicates the firm's? A. liquidity B. debt position C. ability to use its assets to generate sales D. profitability I read about a asset turnover ratio in the text book. this ratio by itself is useless but when compared to the company and industry hist...

finance (net income)
If a firm has a break-even point of 20,000 units and the contribution margin on the firm's single product is $3.00 per unit and fixed costs are $60,000, what will the firm's net income be at sales of 30,000 units? A. $90,000 B. $30,000 C. $15,000 D. $45,000 the firm...

finance (sales on credit)
In general, the larger the portion of a firm's sales that are on credit, the ... A. lower will be the form's need to borrow B. higher will be the firm's need to borrow C. more rapidly credit sales will be paid off D. more the firm can buy raw materials on credit I ...

finance (after-tax profit margin)
The ABC Corp. had net income before taxes of $4000,000 and sales of $2,000,000. If it is in the 50% tax bracket its after-tax profit margin is? A. 5% B. 10% C. 20% D. 25% net income $400,000 - 50% taxes = $200,000 $200,000 / $2,000,000 sales = 10% after-tax profit margin

Finance (after-tax cost)
Assuming a tax rate of 50%, the after-tax cost of a $200,000 dividend payment is? A. $200,000 B. $100,000 C. $-100,000 D. none of the above O.K., given a $200,000 after-tax dividend payment and a 50% tax bracket. That means the company had at least $400,000 or more before taxe...

finance (retained earnings)
The retained earnings of the firm belong to A. creditors B. prefered stockholders C. common stockholders D. bondholders retained earnings is a company asset. it is money that the company keeps rather than paying a dividend to the stockholders. I like C for my answer retained e...

finance (current asset)
An item which may be converted to cash within one year or one operating cycle of the firm is classidied as a.... A. current liability B. long-term asset C. current asset D. long-term liability I like C current asset-the quest is the definition of a current asset Is this correct?

finance (capital to corporations)
the financial markets allocate capital to corporations by A. reflecting expectations of the market participants in the prices of the corporation's securities B. requiring higher returns from companies with lower risk than their competitors C. rewarding companies with expec...

finance (depreciation)
Depreciation is a source of cash inflow because? A. it is a tax-deductible non-cash expense B. it supplies cash cor future asset purchases C. it is a tax-deductible cash expense D. it is taxable expense depreciation is tax deductable because the original purchase of a machine ...

finance (stock price)
A firm with earning per share of $5 and a price-earnings ration of 15 will have a stock price of? P/E ratio = stock price / earnis per share 15 = X / 5 X = 15(5) x = 75 FINAL ANSWER stock price is $75.00 Is this correct?

finance (efficiency of management)
The best indication of the operational efficiency of management is? A. net income B. earnings per share C. EBIT D. gross profit I like net income as a metric for operational efficiency because net income is how much money the company has after to paid all the bills and taxes.....

finance (bonds to stock)
corporations prefer bonds to preferred stock for financing their operations because? A. prefered stocks require a dividend B. bond interest rates change with the economy while stock dividends remain constant C. the after-tax cost of debt is less than the cost of preferred stoc...

finance (risk premium)
The risk premium is likely to be highest for A. U.S. government bonds B. corporate bonds C. gold mining expedition D. either B or C I like C the gold mining expedition I that correct??

finance (assumptions)
The cost of capital for common stock is ke=(d1/Po)+g. What are the assumptions of the model? A. growth (g) is constant to infinity B. The price earnings ration stay the same C. The firm must pay a dividend to use this model D All of the above are assumptions of the model I rea...

finance (higher interest rate)
A higher interest rate (discount rate) would? A. reduce the price of corporate bonds B. reduce the price of preferred stock C. reduce the price of common stock D. all of the above I remember reading about the relationship between interest and bonds/stocks. When the FR raises r...

finance (asset turnover)
Total asset turnover indicates the firm's A. liquidity B. debt postition C. ability to use its assets to generate sales D. profitability I can't remember the name of the ratio right now, but I remember reading about an asset ratio that is a metric for asset turnover......

finance (firm's net income)
If a firm has a break-even point of 20,000 units and the contribution margin on the sirm's single product is $3.00 per unit and fixed costs are $60,000, what will the firm's net income be at sales of 30,000 units? o.k. the break even amount will be 20,000 units time $3...

finance firm's sales on credit
In general, the larger the portion of a firm's sales that are on credit, the: A. lower will be the firm's need to borrow B. higher will be the firm's need to borrow C. more rapidly credit sales will be paid off D. more the firm can buy raw materials on credit This ...

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