Tuesday
August 23, 2016

Posts by Laura

Total # Posts: 1,158

// calculus - derivatives
y = sec(5x) / x^2 my notes say y' = 5x^2sec5xtan5x-2xsec5x i get y'= sec5x(-2x^-3)+sec5xtan5x(5)(x^-2) when i change it to (sec5x)(x^-2) or by quotient rule [ (x^2)(sec5x)(tan5x)(5)-(sec5x)(2x) ] / (x^4) which is correct?
October 24, 2009

math
chris - do your own homework. at least try it first, show some work or where youre stuck on.
October 24, 2009

calculus
f(x) = (3x^2) (csc4x)^4 // f'(x)=? my notes say : f'(x) = (3x^2)5(csc4x)^4(-csc(4x)(tan4x)(4)+(csc4x)^5(6) I redid it and i got : f'(x) = (3x^2)5(csc4x)^4(-csc4x)(cot4x)(4) + (csc4x)^5(6x) which is correct? if its my notes why?
October 24, 2009

math
perpendicular lines have negative reciprocal slopes such as 3 and -1/3 so put them into y=mx+b form and see.
October 24, 2009

History
In a sentence or two can you please tell me what Marbury vs. Madison was?
October 22, 2009

HRM
how do you write a response recommendation anaylsis for a large and small firm for the demands of growing technology and more, but I am lost how to write it
October 21, 2009

math
How to explain 4/34 (34 divided by 4) to a 4th grader?
October 20, 2009

Decision Making
I can't decide on an event that would have been a rational decision at one time but now is considered to be an irrational decision. I have been looking at the different wars but still don't see it.
October 13, 2009

4th Grade Math
Arrays and an expanded algorithm: 23 x 17
October 12, 2009

com 140
Thank you Ms. Sue. I have found the answer's to this question but I do appreciate how quickly you got back to me
October 4, 2009

com 140
There was a fee tips in there but they are looking for the ones that are not in there. That is what I am having a hard time finding,
October 4, 2009

com 140
Suggest two tips for creating academic documents not mentioned in the resource information.
October 4, 2009

someone answer please
Tracy Migre, a certified public accounting, has completed the following transactions. Ms.Migres assests , liabilites, and owner equity account titles and balances are shown in the table below. use the table on the page to show the effect of each transaction. Transactions: 1)...
September 29, 2009

i need help accounting
Tracy Migre, a certified public accounting, has completed the following transactions. Ms.Migres assests , liabilites, and owner equity account titles and balances are shown in the table below. use the table on the page to show the effect of each transaction. Transactions: 1)...
September 29, 2009

accounting
i mean 1)empty than next box you write your new balance
September 29, 2009

accounting
sorry it didnt post right there is a chart 18 boxes and 6 colums.6cloums are the beginning balanes there on top cash in the bank $5,000, accts rec. $900, equipment $14,000 supplies 1,500 accts payable 3,000 t.migre capital 18,4000 then on the side of the chart it says 1) new ...
September 29, 2009

accounting
Tracy Migre, a certified public accounting, has completed the following transactions. Ms.Migres assests , liabilites, and owner equity account titles and balances are shown in the table below. use the table on the page to show the effect of each transaction. Transactions: 1)...
September 29, 2009

please i need help accounting
i have a promblem it gives me the information and form i understand the information but cant fill out the form because i dont know how and its 71 points out of the whole exam. is there anyway u can help me out if i give you the information. its about transactions the first i ...
September 28, 2009

accounting
what catorgorie does commissions fall in: A)income statement B)statement of changes in owner equity C)balance sheet i think a what catorgorie capital falls in: A)income statement B)statement of changes in owner equity C)balance sheet i think b
September 28, 2009

stoichiometry
if 5.00g magnesium is combined with 10.0 g of chlorine, show by calculation which substance is the limiting reactant and calculate the theoretical yield of magnesium chloride for the reaction. Someone PLEASE HELP ME!!!!
September 11, 2009

physic
Jules Verne in 1865 proposede sending men to the moon by firing a space capsule from a 220-m-long cannon with final velocity of 10.97 km/s. what would have beed the unrealistically large accelerationexperienced travels during launch? compare your answer with the free-fall ...
September 7, 2009

math
an average family of four uses roughly 1200 liters (about 300 gallons) of water per day (1 liter=1ooocm cubed) . how much depth would a lake lose per uear if it uniformly covered an area of 50 square kilometers and supplied a llocal town with a population of 40,000 people...
September 5, 2009

math
thank you
September 5, 2009

math
commutative property?
September 5, 2009

math
0 +16 = 16+ 0 <<< what property is this?
September 5, 2009

algebra
The sides of a triangle are in the ratio 5:12:13. What is the length of each side of the triangle if the perimeter of the triangle is 15 in?
August 18, 2009

statistics
A random sample of 10 observations has been drawn from a normal population, and the sample variance is found to be s² = 19.5. Determine the 98% confidence interval for ó².
August 12, 2009

statistics
For three independent samples, each with n= 100, the respective sample proportions are 0.30, 0.35, and 0.25. Use the 0.05 level in testing whether the three population proportions could be the same.
August 12, 2009

History
How did human history in North America differ from the events of Asia, Eurasia, and Europe before the international state of affairs? How were these differences important to the international state of affairs in 1450?
July 31, 2009

11th English literature
A letter was left off in my previous question, changing the meaning. What is the TONE of ee cummings Anyone lived in a pretty how town and Old age sticks? Examples from poems?
June 27, 2009

english
The American Experience: California Edition (Prentice Hall Literature Timeless Voices, Timeless Themes This is the textbook we are using and it says, " Satire is writing in which an author uses humor to ridicule or criticize certain individuals, institutions, types of ...
June 25, 2009

english
What is the one of e.e. cumings poems ' anyone lived in a pretty how town' and 'old age sticks'? Where is the satire? To me, satire is funny, and I don't find either of these to be funny!
June 25, 2009

geometry
how can we prove that an exterior angle of a triangle has measure equal to the sum of the measures of the 2 interior angles remote from it
June 22, 2009

organic chem
A student's correctly calculated value for the percent recovery of the purified unknown solid in a recrystallization experiment was 102%. Assume that the student performed all steps of the procedure correctly a) comment of the validity of this result; include reasons b) ...
June 22, 2009

physics
Certain neutron stars (extremely dense stars) are believed to be rotating at about 0.76 rev/s. If such a star has a radius of 10 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation? i got 3.4187*10^23 but its not right?
June 17, 2009

geometry
prove triangular inequality: if P,Q, and R are not collinear, then PQ + QR is greater than PR.
June 11, 2009

Music
I need to know the difference between rhythm, beat and pitch in the song Amazing Grace
June 2, 2009

Marine Biolodgy
you do the work yourself lola and stop being lazy and dum
May 25, 2009

Chemistry
4-methyl-2-pentyne show tautomerization ? i know tautomerization is done with a double bond but this one has a triple bond
May 16, 2009

Chemistry
4-methyl-2-pentyne show tautomerization
May 15, 2009

calculus
what's the derivative of cos3x
May 9, 2009

calculus
what is derivative of (1-2x)^-1? is it -1/(1-2x)^2 ?
May 9, 2009

french exam tomorrow, WHAT DO I DO?!
i have a french exam tomorrow and i cant remember nothing, i've looked through my book like a million times and i just forget it about 10minutes later arghhh! help?
May 7, 2009

science
Does work transfer energy as the result of motion
April 28, 2009

calculus
how do you find the limit as n approaches infinity of n/(2^n + n)?
April 24, 2009

Math
at x=4, y=0. if y=0, there is no y vlaue to "slope" the line, so the line will form vertically at x=4.
April 24, 2009

COLLEGE MATH PLEASE HELP
you need to find the permutation when order matters. look up the formula if you don't know it off hand. this should help you start...
April 24, 2009

earth sceince
Help please anyone? If the wet-bulb thermometer and the dry-bulb thermometer readthe same temperature, the air is said to be??? Anyone know?
April 23, 2009

calculus
how do you take a limit of [ln(1+e^n)]/2n as n goes to infinity?
April 23, 2009

calculus
determine if this converges and methods used to find its covergence or divergence. The series as n = 1 to infinity of [(2n+3)/(3n+2)]^n
April 23, 2009

HCA 210 Introduction to Health Care
According to MedicineNet(2008), “Mental illness is any disease or condition affecting the brain that influences the way a person thinks, feels, behaves and/or relates to others and to his or her surroundings. Although the symptoms of mental illness can range from mild to ...
April 23, 2009

algebra
how can i find adding,sudtracting,andmutiply fraction
April 19, 2009

college math
when eggs in a basket are removed 2,3,4,5,6 at a time there remain, respectively, 1,2,3,4,5 eggs. when they are taken out 7 at a time, none are left over. find the smallest # of eggs that could have been contained in the basket.
April 19, 2009

college math
thank you, count iblis. you have been a tremendous help with homework.
April 19, 2009

college math
what is the remainder when the sum 1^5+2^5+3^5+...99^5+100^5 is divided by 4? again a mod problem that I don't know how to work.
April 19, 2009

collegemath
find remainders when 2^50 and 41^65 are divided by 7. this is a mod problem but I don't know how to work it...
April 19, 2009

number theory
How do you prove that any palindrome, a number that reads the same backwards and forwards, with an even number of digits is divisible by 11? I know how to show a number is divisible by 11, but how do you prove the above case?
April 19, 2009

number theory
How might you go about proving that N-M is divisible by 9 when N represents an integer (such as 6923) and M represents that integer in reverse order (such as 3296)? so far, I have shown that 6923-3296=3627 is divisible by 9 by the sum of the digits, but how do you prove that ...
April 19, 2009

number theory
give an example to show that a^2 congruent to b^2 mod n need not imply that a congruent to b mod n.
April 18, 2009

ecology
I need to write an ecological profile for an animal. What exactly is an ecological profile? What does it include? Since I am not actually conducting research...it does not need abstract, materials, methods, results etc??? Please help. Thanks
April 11, 2009

college math
how would you find all prime numbers that divide 50! (factorial)?
April 7, 2009

soical civics
in what way could putting a traffic on foreign shoe imports result in a disadvantage to the united states economy or united states consumers i say we would not be able to buy them
April 7, 2009

Chem
so it will be 1 as the last electron comes on that one correct? umm and i don't see the link you posted :S
March 30, 2009

Chem
what are the four quantum numbers of the last electron of As this is what i have n=4 l=1 ms= 1/2 i don't know how to calculate ml. I know it's either: -1,0,1
March 30, 2009

math
if a number is evenly divisible by 6, it is also evenly divisible by which other numbers?
March 30, 2009

calculus
thnx
March 24, 2009

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

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