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December 21, 2014

Posts by jane


Total # Posts: 1,402

Calculus
There was a typo in last question A company estimates that the cost ($) of producing x units of a certain product is given by: C= 800 + .04x + .002x^2 Find the production level that minimizes the average cost per unit.
March 30, 2009

Calculus
I still do not see what the answer would be . Is x = .001
March 30, 2009

Calculus
Sorry for the typo - you are correct it should be -.002x^2
March 30, 2009

Calculus
Here's one more that I do not understand A company estimates that the cost ($) of producing x units of a certain product is given by: C= 800 + .04x + .0002x^2 Find the production level that minimizes the average cost per unit. Thank you so much
March 30, 2009

Calculus
This is the question - you are designing a rectangular poster to contain 256 in^2 of printing with a 3 " margin at the top & bottom and a 2 " margin at each side. What overall dinmensions will minimize the amount of paper used? Round to the nearest whole inch if ...
March 30, 2009

Calculus
Here's another one that I do not really understand. A company estimates that the cost (in dollars) of producing x units of a certain product isgiven by: C=800 + .04x + .0002x^2. Find the production level that minimizes the average cost per unit.
March 29, 2009

HS Calculus
Having trouble with this questions. Please help. A particle moves on the x-axis so that its position at any time t (is greater than or equal to) 0 is given by x(t) = 2te^-t a) Find the acceleration of the particle at t=0 b)find the velocity of the particle when its ...
March 29, 2009

spanish
How do you say great great grandmother and great great grandfather in spanish?
March 5, 2009

college
What was the result of your IAT, and do you feel that the test produced valid results in your case? o In your opinion, is it difficult to accurately measure prejudice? Why or why not? o Describe other measurements sociologists use to calculate prejudice
March 3, 2009

Chemistry
thx 4 the help.
February 28, 2009

Chemistry
Why might exposure to organic chemicals be a problem? Refer especially to halogenated hydrocarbons and alcohols. Help please. thx
February 28, 2009

calculus
f(x) = cos(x) - (cos(x))^2 for -pi is less than or equal to x is less than or equal to pi 1) x-intercepts? 2) x and y coordinates of all relative maximum points? 3) intervals on which f is increasing? then i have to sketch f, so tips on doing so would be appreciated. thank you!
February 27, 2009

Aantomy
How would damage to inter neurons in the spinal cord affect nervous system function?
February 23, 2009

calculus
thanks!
February 21, 2009

calculus
Find the exact value of: cos(arctan(2) + arctan(3)) Please explain how you got your answer. I have the answer, but I don't know how to get to it.
February 21, 2009

i lied. very quick calc problem.
f(x) = abs(sin(x)), -pi less than or equal to x less than or equal to pi g(x) = x^2 let H(x) = g(f(x)) i got that H(x) would equal sin^2(x). THIS IS WHERE I AM STUCK! find the domain of H. do i still need to account for "-pi less than or equal to x less than or equal to ...
February 20, 2009

last calc question, i promise!
the second one would be x = 2, resulting in the original point (2,1), i think. but other than that, thank you sooooo much!
February 20, 2009

last calc question, i promise!
ALSO ALSO ALSO - on my first calc question (a couple posts down!), i added more to the problem that i forgot, so i need help with that too.
February 20, 2009

last calc question, i promise!
i mean: do i just set (-1-y)/(x+4y) equal to -1/3 AND use the original formula to come up with an answer? like a two-variable system?
February 20, 2009

last calc question, i promise!
given the curve x + xy + 2y^2 = 6... a. find an expression for the slope of the curve. i got (-1-y)/(x + 4y) as my answer. b. write an equation for the line tangent to the curve at the point (2,1). i got y = (-1/3)x + (5/3). but i didn't any answer for c! c. find the ...
February 20, 2009

calc again!
thank you sososososo much! i was pretty sure of these, but i wanted to double-check.
February 20, 2009

calc again!
i got answers for this one, but i feel like i did something wrong. f(x)= 2x+1 when x is less than or equal to 2 (1/2)x^2 + k when x is greater than 2 1) what value of k will make f continuous at x = 2? my answer: i got k = 3 because it would make the two parts of the function ...
February 20, 2009

calculus please
i forgot the part that said "for -pi is less than or equal to x is less less than or equal to pi" this was attached to the f(x) - does it change the answer? the domain?
February 19, 2009

calculus please
given f(x) = abs(sin x) and g(x) = x^2 for all real x: 1) let H(x) = g(f(x)) and write an expression for it. 2) find domain and range of H(x). 3) find an equation of the line tangent to the graph of H at the point where x = pi/4.
February 19, 2009

Algebra
3) ab+mn+an+mb ab + an + mn + mb a(b + n) + m(n+b) (a + m)(b + n)
February 19, 2009

Algebra
6) P = 22 A = 24 2l + 2w = 22 lw = 24 l = 24/w 2(24/w) + 2w = 22 48/w + 2w = 22 48 + 2w^2 = 22w w^2 - 11w + 24 = 0 (w - 8)(w - 3) = 0 w = 8 or 3 l = 3 or 8 dimensions = 3 x 8
February 19, 2009

Algebra
4) GARDEN width = w length = w +5 GARDEN w/CEMENT WALK width = w + 6 length = w + 5 + 6 = w + 11 a = 546 ft sq. a = lw a = (w+6)(w+11) 546 = (w+6)(w+11) 546 = w^2 + 17w + 66 0 = w^2 + 17w - 480 w = (-17 +/- sqrt(289 - 4(1)(-480))/2 w = (-17 +/- sqrt(289 + 1920))/2 w = (-17...
February 19, 2009

French
Can you please unscramble these letters into 4 words with this spacing. xxx xxx xx xxxxxxxx? CPOBETULEEIQSAUL Thank you
February 17, 2009

Organic chemistry
Write contributing (important) resonance structures for each of the following compounds and predict their relative C=O vibrational frequencies based on the importance of the contributing resonance structures. List in them order from highest to lowest frequency. a.) ...
February 17, 2009

chemistry
I am trying to synthesize CH3CH2CH2CH2CL from only 2HC=CH2, and am unsure about which mechanism to use, any ideas?
February 16, 2009

chemistry
I am trying to synthesize CH3CH2CH2CH2CL from only 2HC=CH2, and am unsure about which mechanism to use, any ideas?
February 16, 2009

math
f''(x) = 24x^2(x^2-1) + 6(x^2-1)^2 when is the graph of f concave upward?
February 11, 2009

Organic chemistry
Suggest an appropriate reducing reagent for the following substrates and predict the product of the reaction: a) 2-hexanone b) ethyl 4-nitrobenzoate (reduction of the nitro group) c) hexanal
February 7, 2009

history
oh wow, thank you so much!
February 5, 2009

history
i have a bunch on her rule in my history notes, but i wanted some extra information and she apparently doesn't exist by that name online! she ruled china in place of several child rulers and ruled during a war in maybe the late 1800s? that's all i have and i need more.
February 5, 2009

history
i really need to know who zuxi is and google isn't coming up with anything and for some reason, my last question was deleted. help please?
February 5, 2009

history
Why did westernization fail in the Ottoman Empire?
February 5, 2009

chemistry another Q
Which, 9-fluorenol or 9-fluorenone, would have higher Rf value on a silica gel plate with 30% acetone/70% hexane at the eluent? Explain.
February 2, 2009

chemistry
Calculate the amount (volume) of 5.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 100mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation.
February 2, 2009

history
Was Westernization the best policy for China, Japan, Egypt, and the Ottoman Empire? i don't need a direct answer, just links to websites that could help me out with this. google didn't come up with anything for me.
January 28, 2009

how children learn
according to carl jung what are the two main ways that people process information
January 19, 2009

Calculus
Got a midterm worksheet. Realized how confused I am. Here are some questions: lim x^3 + 12x^2 - 5x/5x x->0 Find the indicated limit: lim 11x/absolute value x x->0+
January 19, 2009

calculus
Consider curve given by x^2+ 4y^2= 7 + 3xy.. Three part question A) show that dy/dx = 3y-2x/8y-3x B) Show that there is a point P with x-coordinate 3 at whiich the line tangent to the curve at P is horizontal. Find the y-coordinate of P. C) find the value of d^2y/ dx^2 at the ...
January 11, 2009

Calculus
Find: 1)x^2-y^2=15, normal at (-8,7)
January 11, 2009

Eth125
What was the result of your IAT, and do you feel that the test produced valid results in your case? o In your opinion, is it difficult to accurately measure prejudice? Why or why not? o Describe other measurements sociologists use to calculate prejudice
January 11, 2009

Calculus
I rewrote the quesion y = sqrt (4 + sin 10x)
January 8, 2009

Calculus
y = sqrt (4 + sin 10x)
January 8, 2009

Calculus
More questions on - finding dy/dx 1) y = sqrt 4 + sin 10 x - I am lost again 2) y = 10/sin x answer: - 10 csc x cot x 3) y = sin x/ 8x
January 8, 2009

Calculus
Need help to find dy/dx: 1) y = (sin x) ^-1/3 answer dy/dx = - 1/ 3(sinx) ^4/3 2) y = sqrt 8 + sin(6x) answer - lost
January 8, 2009

spelling
brother is to mother like fly is to? 4 letters and must include scr spr str or thr
January 7, 2009

Calculus
Answer ? - impicit differentiation Find dy/dx & d^2y/dx^2 y^2 - x^2 = 2 is the answer dy/dx=x/y; d^2y/dx^2= y^2-x^2/y^2
January 7, 2009

Calculus
I did miss the sign but would the answer be: 7x^6 - ----- csc^2y
January 7, 2009

Calculus
Here's another one - I think that I am starting to understand it. Find dy/dx by implicit differentiation: x^7 = cot y My answer is csc^2y / 7x^6
January 7, 2009

Calculus
Thanks Remy. I have one more - 2y + 9xy-4=0 I got -9y/2 + 9x
January 7, 2009

english
Neither Shanti nor Neelima have an extra pen. I think
January 7, 2009

Calculus
I am lost. Find dy/dx by implicit differentiation. 1) 5y-2x^2=x-3
January 7, 2009

PHysics
describe briefly how a generator works. Well, I'm in the electricity unit of my course, so would this mean I have to describe how electricity's generated?
December 28, 2008

english
annagrams aeiifglnhpwystThis is an event that will never happen. However, I suppose it could on any given Saturday Night. Here are your letters, you will have 3 left over. A E I I F G L N H P W Y S T
December 23, 2008

english
solve this puzzle make two words you will have one letter left. aeeioumnrrstv
December 18, 2008

physics
In the figure below, a uniform sphere of mass m = 2.50 kg and radius r = 2.4 cm is held in place by a massless rope attached to a frictionless wall a distance L = 10.2 cm above the center of the sphere. (a) What is the tension in the rope? N (b) What is the force on the sphere...
December 13, 2008

physicscalculus
An automobile with a mass of 1310 kg has 3.10 m between the front and rear axles. Its center of gravity is located 1.78 m behind the front axle. The automobile is on level ground. (a) Determine the magnitude of the force from the ground on each front wheel (assuming equal ...
December 13, 2008

english
i have to devise a writing exercise which has to involve all children working on writing one text.so i need some ideas
December 12, 2008

english
hello:)i have to give my class a writng exercise which has to involve all children.they all have to work on writing out one and the same text?any ideas?
December 12, 2008

math
97.3 is 7% of what number?
December 12, 2008

math
roberto has 22% of his pay withheld for deductions. if he earns $680 per week, what amount is withheld?
December 12, 2008

sci/275
Raw carrot 52 calories per serving. Energy Calculator Trophic level Type of producer or consumer Total energy available from previous level (100%) Energy from total gained by consumer (10%) Energy from total lost when consumed (90%) First Primary producer 52 N/A N/A Second ...
December 9, 2008

sci/275
Identify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix CHow did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth trophic levels? Considering the...
December 9, 2008

literature
trust me i got a 85% which is a disappointment so if you want a 100% take this down 1.B 2.B 3.B 4.B 5.D 6.C 7.A 8.D 9.C 10.C 11.D 12.C 13.A 14.A 15.C 16.A 17.C 18.D 19.A 20.A
December 9, 2008

math
Ms. Jordan has been given a loan of $2,500 for 1 year. If the interest charged is $275, what is the interest rate on the loan?
December 9, 2008

english
need some help!which language learning strategies are you using when you need to solve these tasks: 1.Rewrite the sentences using adverbs I'm a terrible dancer.I dance_______ 2.Read the text and make questions and 3.Make subject and object questions So which language ...
December 7, 2008

english
yes, i will be teaching ESL classes.I'll look through this page and see what is says.:)
December 7, 2008

english
Hey everybody:) Question:How can I as a future teacher help my students to practice how to use language?
December 7, 2008

deutsch
Hallo!Versteht hier jemand deutsch?Ich muss einen Bericht schreiben.Muss ein Thema sein das etwas mit Kroatien zu tun hat.Eher was aktuelles.Wenn jemand mir Hilfe leisten kann könnte dann wäre ich sehr dankbar!
December 1, 2008

government
are third party efforts essentially a waste of time in America? who were the 4 greatest presidents and why? (did anyone know the site or where i could find the answer for this???)
November 28, 2008

Niagara Falls
So you mean the characteristics of Niagara Falls???
November 26, 2008

Niagara Falls
Well, I'm doing a project that I picked in science and one of the questions said "What are the physical features of Niagara Falls" and I don't know what that means, so please help me!!!
November 26, 2008

health
Well, you could say that how he's gonna ruin the family or what's going to happen if he drinks a lot.
November 26, 2008

HS Calculus
I have one more that I really am lost at. Question - find the points on the graph y=2x^3-3x^2-12x+20 at which the tangent is parallel to tthe x-axis. I do not even know where to begin. We were told we could use the shortcut for this one.! Thanks again
November 25, 2008

HS Calculus
Thank you . I think that I understand alittle better. It is oblivious that I do not understand this material.
November 25, 2008

HS Calculus
Definition of the derivative to calculate f'(x) if f(x) = square root 2x. Find the equation of the tangent & normal line to the graph of f at x=2. Tangent line - y=2x-x Normal line - y = 1/2x +3 I do not know whether these are the correct answers.
November 25, 2008

HS Calculus
Let f(x) = 2/3-x a) find the slope of the tangent to the graph of f at a general point x0 using the definition of the dervative. b) use the result in part a to find the slope of the tangent at x0=1. I am very confused. My answer for (a) 1/ 6-6x-x^2 (b) -1 I compared them to a ...
November 25, 2008

Calculus
what is the limit of x/(ln x) as x approaches 0?
November 8, 2008

math
235 x 0.3 = x 235 - x = the amount you have to pay
November 6, 2008

HS Calculus
1) Limit theta approaching zero sin squared theta/ tan theta 2) Lim x appraoches zero x + sin x/x x + sin x/x = x/x + sinx/x 0 + 1 =1 My answer : 1 Is this correct
November 3, 2008

HS Calculus
Help Have some more that I do not understand. Limit theta approaching zero SinTheta minus Tan theta/ sin cubed theta
November 3, 2008

HS Calculus
1) Limit theta approaching zero sin squared theta/ tan theta 2) Lim x appraoches zero x + sin x/x x + sin x/x = x/x + sinx/x 0 + 1 =1 My answer : 1 Is this correct
November 3, 2008

HS Calculus
Have some more that I do not understand. Limit theta approaching zero SinTheta minus Tan theta/ sin cubed theta
November 3, 2008

Calculus
Evaluate: Limit - Theta approaches 0 Theta /cos theta
November 2, 2008

science
What is the lock and key theory? Explain. I need to use words such as active site, substrate and catalyst Are there any diagrams of it?
November 2, 2008

HS Calculus
Sorry I posted the incorrect ? Evaluate: Theta approached zero Theta/cos theta
November 2, 2008

HS Calculus
Evaluate..........Please Help Lim Infinite -> 0 Infinite/cos infinite
November 2, 2008

Math
27 IS THE MODE WHICH IS THE # USED MOST. THERE ARE (2) OF THE FOLLOWING #'S: 20, 27, 36. IF THE MODE IS THE MOST USED #, THEN THERE SHOULD BE (3) 27. FIRST BLANK SPACE IS 27. RANGE IS THE DIFFERENCE BETWEEN THE 1ST # AND THE LAST #. FIRST # BEING 18 AND THE RANGE IS 22 SO ...
October 27, 2008

calculus
Help - I have three problems that I am stuck on - 1. Lim x approaches infinity (x-3/x squared + 4) 2. Lim x approaches 3 x cubed - x squared - 7 x +3/ x squared - 9 3. Lim x approaches negative infinity (x + square root x squared + 2x)
October 27, 2008

calculus HS
Analtical method to evaluate Lim X -> -infinite
October 26, 2008

AP English Comp
Same type of ?- Using - Notes of a Native Son by Baldwin 3. Baldwin uses many different writing techniques in the essay. Find instances of concrete description, action, reflection, and strong argumentative assertions. How do these techniques further his specific purposes.
October 26, 2008

AP English Comp
Help - Baldwin's - Notes of a Native Son - 1. What are the time periods of the essay? Baldwin does not present them chronologically; how does he connect them?
October 26, 2008

Social Studies
How did the Cherokee use the land to get food?
October 22, 2008

Philosophy
Appendix F Philosophy and Belief in God Matching Ativity
October 20, 2008

college level physics
a 40 kg skier skis down a frictionless slope angled at 10 degrees to the horizontal. Assume the skier moves in the negative direction of an x axis along the slope. A wind force with component Fx acts on the skier. What is Fx is the magnitude of the skier's velocity is (a) ...
October 19, 2008

Math
No
October 19, 2008

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