Saturday
October 1, 2016

Posts by Laura

Total # Posts: 1,192

calculus
what's the limit as n goes to infinity of (2 + 4/n^2)^(1/3)
March 24, 2009

Physical Science
0.83 m/s
March 20, 2009

social civics
what plan of government is used in chicago heights
March 16, 2009

calculus
what is the derivative of 4(x^2-1)^-1/2
March 15, 2009

Physics
What is the difference between an inelastic and an elastic collision? What does kinetic energy have to do with all of this? Give an explanation that explains the role of momentum, kinetic energy, and such in collisions. I think elastic collisions is when the things bounce of ...
March 10, 2009

college math
find the integral of x^2 e^-xdx with the limits of negative infinity to zero. so far, I have, lim as t approaches negative infinity of (-e^-x [x(x+2) + 2] from 0 to t does this converge or diverge?
March 9, 2009

college math
Prove: there exists x and y for c=ax+by iff gcd(a,b)/c.
March 8, 2009

college math
thanks, I'll try these methods
March 8, 2009

college math
the exact problem states: for an arbitrary integer a, verify that 3/a(2a^2+7). This is a problem out of a number theory book included in the section involving gcd.
March 8, 2009

college math
Yes, you are to prove that 3 divides [(a)(2a^2+7)] probably by using the greatest common divisor.
March 8, 2009

college math
Prove: 3/ a(2a^2 + 7)
March 8, 2009

Chemistry Lab
Hi guys, I thought it would be due to aromaticity breaking difficulty? In the bromination reaction, why are the double bonds which are par t of the phenyl r ing not brominated? A. We only added one equiv alent bromine. B. T he phenyl r ing is aromatic and aromaticity is diffic...
March 5, 2009

5th grade Reading
Its the syllable with the loudest stress. The accent is usually on the syllable before the suffixes such as ion, ical, and ity.
March 1, 2009

General Question
How does this statement go: A slim to none chance or a slim to nothing chace
March 1, 2009

calc
Using L'Hospital's Rule, find, the limit as x approaches 0 of x^(sinx)
February 26, 2009

college math
Using L'Hospital's Rule, find, the limit as x approaches 0 of x^(sinx) thank you in advance to any help.
February 26, 2009

college math
how do you take the derivative of e^(x^2)?
February 26, 2009

collegte math
Using L'Hospital's rule: find, lim as x approaches (-) infinity of xsin(1/x)
February 26, 2009

Economics
How is elasticity of supply related to elasticity of demand? Is this correct? I know that the terms supply and demand refer to the behavior of people as they interact with one another in markets. Buyers determine demand and sellers determine supply. Just as we can measure how ...
February 26, 2009

Social Studies
1. The president of the United States is elected by the electoral college. What type of system is this? 2. In ancient Athens (Greece) tribes and generals took turns at power. This is an example of what type of political system? 3.What type of political system is headed by ...
February 26, 2009

Chemistry
What is the difference between an amino acid and a protein? How does this difference in structure affect biological function?
February 23, 2009

Chemistry
State two differences between DNA and RNA.
February 22, 2009

Chemistry
Give an example of a disaccharide
February 22, 2009

Chemistry
The question is with a lab that I have already done. Here are my numbers moles of malachite in 1g 221.12 moles of CuO produced 141.57 ratio of moles of CuO produced per moles of malachite decomposed 79.55 Use the mole ratio of CuO produced per mole of malachite to write a ...
February 22, 2009

Chemistry
I need to write a balanced equation for this problem and am having difficulty doing so. The question is this: use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO2 is also a product of ...
February 22, 2009

Chemistry
I need to write a balanced equation for this problem and am having difficulty doing so. The question is this: use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO2 is also a product of ...
February 22, 2009

Chemistry
Why do carboxylic acids generally have higher melting and boiling points than alcohols, ketones, and aldehydes of comparable mass?
February 21, 2009

Chemistry
Explain why alcohols of lower molecular weight are generally soluble in water but those of higher molecular weights are generally not.
February 21, 2009

college math
How do you prove: If a/b, then a/bc So far I have: Since a/b, then b=ac where c is an integer. Now where do i go?
February 21, 2009

Chemistry
What are amine salts?
February 18, 2009

Chemistry
An alcohol has an OH functionally in it. Do you expect it to be a base? Why, or why not?
February 18, 2009

Economics
How does the government participates in a mixed economy? Based on principles of the free market, allowing some government intervention. Is there anything else i can say?
February 18, 2009

college math
how do you integrate (cos^2 x)^4
February 15, 2009

college math
thnx
February 15, 2009

college math
is the integral of 1/x^2, 2x ln of the absolute value of x^2?
February 15, 2009

college math
thank you. i understand now.
February 15, 2009

college math
how do you integrate ln(x^2+1)dx?
February 15, 2009

math
yes, I got this answer, as well THANKS
February 15, 2009

math
how do you integrate (3x+1)/(x-1)x^2 dx?
February 15, 2009

math/ cal
thank you for your answer, but this example problem is not the same as mine. the example problem is (sin (x))^2, in other words the whole quantity is squared. mine is just sin of x^2. any suggestions here?
February 15, 2009

math/ cal
how do you integrate sin (x^2) dx?
February 15, 2009

Chemistry
Name an isomer of pentane (that is not cyclic) and write down its structure.
February 14, 2009

adult education
I am currently studying for the cbest exam in all three areas, math, reading and writing. Does anyone have any current information that would help better prepare for these tests.
February 14, 2009

Chemistry
What is the three dimensional structure of methane? Why?
February 14, 2009

Chemistry
What is the difference between hydration and hydrogenation reactions?
February 14, 2009

CHemistry
Why do cis and trans isomeric compounds exhibit different properties?
February 14, 2009

Chemistry
Why is the benzene molecule represented as " a flat cyclohexane with a ring inside?"
February 14, 2009

Chemistry
Why is benzene much less reactive than 1, 3, 5-cyclohexatriene?
February 14, 2009

Chemistry
Are these compounds organic, if not what are they? Kmno4 CH3OH C6H6 PdC12 CH3CO2H
February 14, 2009

Chemistry
What is the formula of 1,3-butadiene?
February 11, 2009

Chemistry
Name one structural and one chemical difference between acetylene and ethylene. Give reasons.
February 11, 2009

Chemistry
Name an isomer of pentane (that is not cyclic) and write down its structure.
February 11, 2009

Chemistry
What is the three dimensional structure of methane? Why?
February 11, 2009

Chemistry
What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones?
February 11, 2009

Economics
1. The main disadvantage of using shells as money, instead of coins, would be a lack of: a. durability b. portability c. uniformity d. divisibility I think its B. portability?
February 11, 2009

Economics
Thank you, for your feedback. I just read another part of my economic book and B is definitely the answer.
February 11, 2009

Economics
1. Products that would be used in calculating GDP include: a. Toys manufactured in China at a factory owned by a U.S. company b. cars manufactured in Tennessee at a factory owned by a Japanese automobile company c. plastic manufactured in Kentucky and sold to toy manufacturers...
February 11, 2009

CHemistry
In a clean 250mL volumetric flask, 125mL of a 6.0 M hydrochloride acid was added. This was then diluted with more water to reach the 250mL mark. What is the molarity of the acid at this time?
February 7, 2009

Chemistry
calculate the final concentration if 4.0 L of 1.5 M NaC1 and 2.0 L of 3.0 M NaC1 are mixed.
February 7, 2009

AP CHEM
How did you get part B?!
February 7, 2009

science
What kind of materials block sound.
February 5, 2009

Physics - Waves
0.78352941
January 26, 2009

Physics - Waves
0.141525
January 26, 2009

Socialogy and cultural diversity
Are Irish Americans considered a subordinate group in American History? I need to do a paper on a subordinate group and I was thinking of using Irish Americans.
January 16, 2009

Chemistry
91.7g of HCl solution was added to the calorimeter and brought to a constant temperature. Then 0.5278g of MgO was added and the temp rose from 25.65C to 32.60C and held steady. Then 0.0185g of Mg was added and the temp again rose from 30.35C to 32.20C Calculate the Cp for the ...
January 14, 2009

chem
If a cube with edges of 1.000 cm weighs 25.68 g, what would the mass of a cube of the same material with sides 2.63 cm in length be?
January 13, 2009

Chemistry
91.7g of HCL solution was added to the calorimeter and brought to a constant temp. Then 0.5278g of MgO was added and the Temp rose from 25.65C to 32.60C and held steady. Then 0.0185g of Mg was added and the temp again rose from 30.35C to 32.20C. Calculate the Cp for the ...
January 12, 2009

spanish help
1. soy 2.somos 3.son 4.estoy 5.fue 6.es , era ?? 7.es 8.esta
January 9, 2009

spnaish HELP
1. Is wrong. Its... Quiero ir a Colorado para Navidad 2. Has comprado algo para la cena ? 3. Este celular es solo para emergencias. 4. Ella siempre viaja en autobús.
January 9, 2009

grammer
Thanks Ms.Sue and Writeacher...website was a big help. My son now has a better understanding subject/predicate! very happy :)
January 6, 2009

grammer
what is a predicate? My son's assignment is to circle the action verb and underline the predicate. I've tried to explain what a predicate is, but he still doesn't understand.
January 6, 2009

science
Appendix
January 6, 2009

home economics
how does the increase in use of ethanol in the United state impact other place in the world?
January 4, 2009

Calculus
The curve f(x)=-x^4+2x^2+x has a tangent at the point (1,2). Is this line tangent to the curve at another point and, if so where?
January 4, 2009

math need help with this
If on the first of January a savings account has a balance of $3200 what amount will be in this account after three years if the bank gives 6% per year interest compounded quarterly?Assume that there are no deposits or withdrawals of money during these three years.
December 17, 2008

algebra with pizzazz
What is it called when a sea bird lands on a channel marker?
December 16, 2008

math
A dealer offers a computer software program whose list price is $500 at a 19% discount. She will give an extra 3% discount if paid in cash. What is the selling price if payment is made in cash? If 500=81%, _____=78% (this comes from subtracting 19% from 100%, then subtracting ...
December 16, 2008

math
need help in 1996, the civilian labor force of the united states included 127 million people, and 5% were unemployed. how many people in the cilvilian labor force were unemployed?
December 16, 2008

math
the two parallel bases of a trapezoid are 5inches and 6 inches long. the altitude of the trapezoid is 4inches. what is the area of the trapeziod? i got 15
December 5, 2008

science
~Which type of plate is thicker? continental or oceanic [i know that oceanic plates are denser but that doesn't exactly mean its thicker.] ~Which type of plate, continental or oceanic, is older?? [on this question i have no clue] Thanks for any help! <3
November 29, 2008

chemistry
THANX I AM IN 5TH GRADE AND THIS WAS 4 A PROJECT
November 21, 2008

chemistry
I NEED A MODEL OF THE ELEMENTS OF CHLORINE
November 21, 2008

Precalculus with applications
Determine whether the system of inequalities is infeasible, has alternate optimal solutions, or is unbounded for the function f(x,y)=2x+y
November 18, 2008

english
what does the word daff remind you off?
November 16, 2008

MATH
please help execute the indicated multiplications. (x-2)(x^2+2x+4)
November 14, 2008

MATH
combine like terms is this correct (5x^2+6x+8)+(6x^3 +2x^2-4x) = 6x^3+7x^2+2x+8
November 14, 2008

math
please help me out here the problem is combining like terms. 4x^3-3x^3+9x+2x I got 1x^3+11x but when i asked a friend they said it would be x^3+11x could u help me out please. also could you tell me if this probem is correct as well (10x^3+6x^2+4x) -(8x^3+2x^2-3x)= 18x^3+4x^2+...
November 14, 2008

US history
we are supposed to create an advertisement for a revolutionarynewspaper- around the constitutional convention time.. what products do you think they would sell at that time??? thank you!
November 10, 2008

Math
oh and this is grade nine math
November 6, 2008

Math
it says the knights banquet hall uses the equation 25n-c+1250=0 determine the cost for a hall rental the legions banguet hall usues the equation 30n+995-c=0 to determine the cost for thier hall rental express each equation in slope y-intercept form- c=mn+b identify the fixeed ...
November 6, 2008

college algebra
Identify the units on x in each of the following equations. (a) x= yz (both y and z are measured in feet) (b) x=3y^2 (y is measured in inches) (c)x = t^3 (t is measured in seconds) (d) x 4F^2 d (both F and d are measured in meters) 4. In an exponential expression such as A = ...
November 4, 2008

Science- Chemistry
THANK YOU!
October 28, 2008

Science- Chemistry
What does NaHco3 + HCl produce?
October 28, 2008

math
75 150 divided by 2 equals 75
October 27, 2008

10th grade english
um how do u write an extended metaphor
October 23, 2008

science
THANK YOU SOOOOOOOO MUCH!
October 20, 2008

science
Why are there more warm currents than cold currents in oceans?
October 20, 2008

Algebra
Word Problem: Jack mows the lawn in 4 hours, mary mows the lawn in 5 hours. how long will it take them if they mowed the lawn together? I have a hard time figuring out which formula to use to solve a problem in a word problem can anyone help and tell me how to set up the ...
October 18, 2008

Algebra; check please?
A television has a diagonal of 10 inches and a width of 8 inches. what is it's height? i think the answer is nine inches, am I correct? If I am not how do I find the answer?
October 16, 2008

Algebra
Thank you!
October 16, 2008

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