Monday

December 22, 2014

December 22, 2014

Number of results: 48,187

**Calculus AP**

im still stuck. i need help. evaluate the integral ∫sinx /(1+x^2) dx from -1 to 1
*August 26, 2012 by Vicky*

**Calculus AP need help!**

i still understand this problem If x^2/25 +y^2/49=1 and y(3)=5.6000, find y'(3) by implicit differentiation.
*February 28, 2012 by josephine*

**Calculus**

I need help with this question still!!! Find the values for a, b, and c such that the graph of y= ax^2 + bx + c has a relative maximum at (3,12) and crosses the y-axis at (0,1). Please Help!!!
*March 24, 2011 by Kay*

**calculus**

Sorry to post this again, but I am still unable to understand it and need help. Please help.1) Using 3(x-3)(x^2-6x+23)^2 as the answer to differentiating f(x)=(x^2-6x+23)^3/2, which I have been able to do, I need to find the general solution of the differential equation dy/dx...
*May 22, 2011 by Claire*

**This is for alex, who had needed help with biology**

Hey buddy, so I found my notes and I will post for you tomorrow, if you still need me to do so. Let me know if you still need them. I haven't looked over them in detail, so I can't ensure that they will answer everything you needed help with, but I am sure they will be of use ...
*January 1, 2008 by Alexis*

**calculus**

I am reposting this because I still don't understand it. I need help with this problem. this is what I got so far: P(x)=12x-(x^2/500)-680-4x-0.01x^2 P'(x)=12-0.004x-4-0.02x P'(x)= -0.024x-8 x=8/0.024 My book says x=8/0.024 which somehow become 1000/3. They are the same when ...
*May 4, 2009 by Riley*

**Calculus**

Please help find the rational roots of f(x)=4x^4 - 3x^3 + 2x^2 +x - 3 another is f(x)=-3x^3 - 2x^2 + x - 1 I tried but still confuse please help really really need help Thank you very much!
*September 2, 2012 by Heather*

**math - still don't get it**

Thanks for helping me for figure out my age in months and days but I still need to find my age in hours. Please help me. Thank you.
*August 13, 2012 by GL *

**Math (pre-calculus)**

Hi! I have a question! I forgot how to do these two problems, and I need some help in solving them! Thanks so much! 1.) Find the first 5 terms of the sequence given by a1=2, an=3an-1 -1. (It's: a sub 1 =2, a sub n= 3a sub n-1 -1) Does that make sense? If not, that's ok. I'll ...
*November 2, 2008 by Angellove*

**Calculus (Math 2A)**

Use implicit differentiation to find the slope of the tangent line to the curve y/(x-2y) = y^3 +9 (1,10/21) ive done this problem around 10 times and i still cant get it.... when i did it the last time i got -9-y^3/ 3y^2 x - 8y^3 - 19 and the slope around 0.4754 but it is ...
*February 19, 2012 by BOB PLEASE HELP*

**CHEMISTRY**

A 21g SAMPLE OF SULFURIC ACID IS DISSOLVED COMPLETELY IN SUFFICIENT WATER TO MAKE A .025 LITRE OF FINAL SOLUTION. CALCULATE THE HYDROGEN ION CONCENTRATION (IN mol1-1)IN THIS SOLUTION. GIVE YOUR ANSWER IN SCIENTIFIC NOTATION TO AN APPROPRIATE NUMBER OF SIG. FIGS. SHOW THE ...
*March 8, 2007 by Desmond*

**Math**

Hi...i asked a question about 45 minuets ago, and i have been working at it still. I still havn't gotten an anwser! Could somebody please help me! The question is, "this staircase has 3 steps (their are 6 blocks lined up as a staircase) How many blocks would you need for a 2-...
*May 26, 2008 by Dawn*

**Pre-calc**

Find the effective rate of interest for 5.25% compounded quarterly. I don't know how to solve this. Would I use this equation A=Pe^(rt) But still I don't know because even if I put the given info into the equation I still need P and A
*January 12, 2011 by Amy*

**socials**

ms. sue i actual still need help on first question because i read again and i not think i need to mention some info in this answer and sorry i reword it wrong it have to be this. i add not in there there have to be no not. how has burden of debt in develop countries prevent ...
*January 12, 2012 by Mohammad*

**Literature**

I need to make a fake letter from Roger [in Langston H's short story Thank You Ma'am] and for that I need to create a fake adress. I need help with this; I looked at the setting described but I'm still stuck. Thanks -MC
*September 3, 2009 by mysterychicken*

**Social Studies**

How is New York City not changed from the days when it was called New Amsterdam? A. Its streets still have walls. B. Its houses still look the same. C. It is still a major trading center. D. It still has mostly Dutch residents. My answer- K
*July 3, 2014 by Dddd47906*

**English**

I urgenlty need you to check these sentences. Thank you. I'm emailing you the list of objectives again since my first draft was incomplete. I still have to add a few things as to the impact of the project on our students and the European value attached to it. Let me check the ...
*February 1, 2012 by Henry2*

**Calculus**

Evaluate the integral: 16csc(x) dx from pi/2 to pi (and determine if it is convergent or divergent). I know how to find the indefinite integral of csc(x) dx, but I do not know how to evaluate the improper integral, at the following particular step. I know I need to take the ...
*June 5, 2012 by Sam*

**Calculus**

What is the simplest solution to the Brachistochrone problem and the Tautochrone problem involving calculus? (I know that the cycloid is the solution but I need a simple calculus proof as to why this is the case)
*May 27, 2010 by Sam*

**Calculus, bobpursley! **

This has to do with my last Calculus problem. I need help on it..The part I replied to after you answered the question.
*September 21, 2010 by Leanna*

**Algebra 2. HELP**

Furniture Assembly: At the beginning of your 8 hour shift, there were 42 units of furniture that needed assembled. The number of units N that still need to be assembled during your shift can be modeled by n(t)=-3t +42 where t is the time in hours... 1. Graph the model 2. What ...
*September 2, 2014 by Josh*

**calculus**

I need help with this calculus problem. H(S)=S/(1+S) If F 1/2, -1/2 & (a+1)? I can't figure out what this mean /?
*May 30, 2011 by Tammy*

**English**

i'm reading a book called "1984" i have an assignment that got to do with propaganda in 1984. i have to find 4 propaganda examples so far i got 2/4 examples i still need 2 more examples i dont know what other propaganda there are the examples must be under these categories: ...
*January 7, 2011 by needhelp!!!*

**Calculus AP need help!**

Use Part 1 of the Fundamental Theorem of Calculus to find the derivative of the function. If f(x)= ∫(4,x^3)√(t^2+10) dt then f '(x).
*April 17, 2012 by dania*

**Calculus**

I need to take a college calculus class. Can someone direct me to a site which might help me get a good start? Thanks in advance.
*July 10, 2008 by jules*

**Pre Calculus**

How do I find the domain in this problem? Is it that the denominator cannot equal zero still? x^2-x/(x^2-x)+2
*October 6, 2008 by Crystal*

**Maths**

Please, I still need help with this. I need to make tables of values for both horizontal and vertical stretching, but I wasn't in class and missed the lesson. I don't really understand how to get the values; at first I figured you'd get the value of y by just pluging in ...
*September 14, 2008 by Isobelle*

**math - still don't get it**

Ms. Sue I still need help. On this website called 1happy birthday it said I am 117 months, 3,563 days and 85,512 hours. And that is because I searched it for July 3rd. So my main question really is that how do I figure out my age in months and days I am from 10/1/2002 to 7/3/...
*August 13, 2012 by GL *

**Chemistry**

I know that this is an off topic question, but I need you to respond to this.... I received barely an A in my chemistry class, and my teacher gave me a 2/25 on an assignment... Although I got that grade, I still have an A.. I asked my teacher why and she said that it is not ...
*November 7, 2013 by Anonymous*

**Chemistry**

I know that this is an off topic question, but I need you to respond to this.... I received barely an A in my chemistry class, and my teacher gave me a 2/25 on an assignment... Although I got that grade, I still have an A.. I asked my teacher why and she said that it is not ...
*November 7, 2013 by Anonymous*

**Political Studies**

Hi. I kinda need some help. I need some against points on the topic "That Australia should have a space program" I have already looked at the other posts but I still need more. Oh and any Ideas for a possible split? Thanks in advance Minnie
*February 28, 2009 by Minerva Wisdom*

**MATH**

I get really confused with math . I am great with all of the other subjects . In fact I get all B's except for Math , I get 1's !!! I really need help with it . I ask for help but whenever people help me and put it in the most simplest way possible .. I still don't get it . I ...
*September 1, 2011 by Kaylyn*

**Calculus Please Need Urgent3 :/**

Find the derivative of the following function using the appropriate form of the Fundamental Theorem of Calculus. F(x)= (s^2)/(1+3s^4)ds from sqrtx to 1 F'(x)=? Thank you so much guys!
*April 19, 2014 by Jay*

**Calculus**

How would I use the chain rule here for x^2+y^2=z^2 but still have my answer in equation form?
*July 3, 2013 by Emma*

**poetry, please comment**

Still So New to You Standing alone Looking' at the moon Why'd you have to leave me so soon I was still so new to you I didn't have a clue Barely even two I was still so new to you still so new....... written by: kathy a.... thanks for any and all comments. good and bad. Thank ...
*April 3, 2012 by i♥zee*

**Math**

I need to find k for the probability distribution: P(x)=k(x+2) for x=1,2,3 I tried subbing in the x-values, which gave me: P(1)=3k P(2)=4k P(3)=5k But I still have no idea what I need to do to find k. Guidance, please?
*January 25, 2011 by Brianna*

**Math**

I need to find k for the probability distribution: P(x)=k(x+2) for x=1,2,3 I tried subbing in the x-values, which gave me: P(1)=3k P(2)=4k P(3)=5k But I still have no idea what I need to do to find k. Guidance, please?
*January 26, 2011 by Anonymous*

**Calculus**

[Linear Approximations and Differentials] I tripled checked my work but I'm still not getting the correct answer. y=3x^2 x=3 & delta x =0.2 I get 3(3.2)^2 - 3(3) = 21.72
*September 27, 2009 by Z32*

**calculus**

In still water, Maria can paddle at the rate of 7 km/h. The current in which she paddles a speedof 4 km/h.At what valocity does she travel downstream? has
*April 10, 2011 by Anonymous*

**social studies/writing**

we have i pproject and i need to find some information on washhiington d.c. i need to find a hisstoric place in washington d.c that starts a d-z. (i am still working on them.)
*December 15, 2010 by April*

**pre Calculus**

how do you find additional points on a line with a slope of 1/2 and a given point of (7,-2)? im sorry but i still cant get an answer for this question.
*September 7, 2008 by Joseph*

**Calculus**

Need an answer to this Calculus Question. I keep getting this type of question wrong. Thanks. Differentiate the Function: y = (3x-1)^2(2-x^4)^2 y =
*April 19, 2010 by Dave *

**Calculus**

I need help with these two review calculus problems for my final exam. What is the derivative of a). (5x^2+9x-7)^5 b). Lne^x^3 For a. I got 50x+45(5x^5+9x-7)^4 For b. I got 3x^2 Can you verify please?
*May 21, 2012 by Sam*

**Calculus**

So,y(t) = 2.5e^-t cos2t I need to find the derivative, which is y'(t)= -2.5e^-t(2sin 2t +cost 2t) . And now I need to find t when y'(t) = 0 (I know 2.5 e^-t is never zero.) I need to use trigonometry identity to find it ?
*April 9, 2014 by Gordon*

**calculus**

Please help. I need ( with details) how to differentiate with the chain rule f(x)=(x^2-6x+23)^3/2. I need to
*April 10, 2011 by ben*

**calculus**

I need help simplifying this problem. f(x)=x^4/5(x-4)^2 f'(x)=x^4/5*2(x-4)+(x-4)^2*4/5x^-1/5 it is suposed to end up as this: 1/5x^-1/5(x-4)[5*x*2+(x-4)*4] but how do i get it to there? I need to see all the steps and how to get them. Thanks
*March 31, 2009 by Riley*

**calculus**

I need to find the critical number of 4x^3-36x^2+96x-64 by factoring. Basically I need to know the zeros.
*November 9, 2009 by Matt*

**Calculus**

I need help with integrals and I need help with the problem. Integral of 4/sqrt(x)dx
*April 11, 2011 by Leanna*

**AED 200**

Help Please! Need some reliable sources for state mandated tests? I feel the test interefere with teaching. I found 2 websites with information but i still need one reliable reference.
*April 21, 2009 by Anonymous*

**Business Communication**

Which way of asking for action carries the highest level of politeness? A. A polite order B. An indirect request C. A question D. An order I'm a bit confused as to what this question is asking for. However, I believe the answer may be B since asking for an indirect request is ...
*August 13, 2010 by Rain Misoa*

**math help & correction**

Problem #1 Is this correct or wrong? Find the slope of the line passing through the points(-1, -1)and(-1, 2). Write the equation of the line. For this one I KEEP GETTING Y= - (3)/(2)x-2.5 Problem #2 Find the y-intecept and slope of 7x+9y=72 My answer: Slope is: - (9)/(8) y-...
*March 31, 2007 by jacky*

**Calculus Exam**

My calculus exam is on friday. I was wondering if anyone had any tips on doing well? I have severe test anxiety and it seems as though no matter how much I prepare I still do poorly. Does anyone have any suggestions for overcoming this?? I cannot afford to fail this exam ...
*December 7, 2008 by Hannah*

**calculus : related rates**

a balloon rises at a rate of 3 meters per second from a point on the ground 30 meters from an observer. find the rate of change of the angle of elevation of the balloon from the observer when the balloon is 30 meters above the ground... so i drew a small picture depicting it ...
*November 5, 2007 by dave*

**Calculus**

An airplane is flying in still air with an airspeed of 325 miles per hour. If it is climbing at an angle of 20°, find the rate at which it is gaining altitude.
*September 29, 2011 by Mary*

**Film review**

I have to write a review of a film I've seen and need help on what are the things I need to include and how long it should be. I googled it but I'm still confused and stuck.
*December 14, 2009 by Anonymous*

**Calculus - Urgent!!!**

In case this looks familiar, yes, it is a repost. I really need help. Find the anti-derivitive of f(x)= x^3(x-2)^2. Multiple choice gives me the options: A: 1/6 x^6 - 4/5 X^5 + x^4 + C B: 1/6 x^6 - 4/5 X^5 + 1/4 x^4 + C C: x^6 - X^5 + x^4 + C D: x^5 - 4x^4 + 4x^3 + C I got as ...
*April 26, 2012 by In Need Of Help!*

**Science/English**

I still need the help of a science teacher. I urgently need to know where to look for English vocabulary used to describe the equipment of both a chemistry and a computer laboratory.
*January 23, 2012 by Henry2*

**a.p. calculus help please!**

My a.p. calculus teacher doesn't know how to do this problem (like many others) so he's giving us 5 points extra credit on our test if we can figure it out, but I don't know how to do it: It's as the lim-->infinity (x+sinx)/(x+cosx) We know the answer is 1 because it's in ...
*October 22, 2006 by teamcaridee*

**Calculus**

Sorry, I need more help! I am reallly struggling with Euler's method, and here's a problem I need help on: y'=2y + sin(x), y(0)=0, dx=0.1, the interval is 0 to 1, and f(x)= [e^(2x)-2sin(x)-cos(x)]/5
*December 18, 2006 by Raine*

**Calculus**

I posted this several days ago but it hasn't been answered and I still can't figure it out: For which values of r does the function defined by y=e^(rt) satisfy the differential equation y''+ y'-6y = 0
*January 12, 2008 by Matt*

**8th grade math**

i still need help on this problem ( 5x-2)-(6-2x)=-x-9+5x
*December 28, 2009 by cynthia*

**to Ms.Sue**

Thank you so much. I bet when I'm in college I will still need your help!
*February 23, 2012 by Celest*

**pre calculus**

I have worked this over and over still think it's wrong. find its inverse, domain, and range of f and f^-1 f(x) = 5/ (3x -7)
*December 15, 2011 by anon*

**Calculus**

Find the limits: lim {[1/(2+x)]-(1/2)}/x as x->0 lim (e^-x)cos x as x->infinity ...First off, I'm having trouble getting rid of complex fractions. I tried multiplying the whole numerator by [(2+x)/2], but you'd still get 0/undefined answer (the answer in the back of my ...
*February 14, 2010 by Momo*

**Calculus**

How would you solve this problem: An airplane is flying in still air with an airspeed of 240 mph. If it is climbing at an angle of 22 degrees, find the rate at which it is gaining altitude.
*November 17, 2010 by Anonymous*

**Calculus - Still Need Help! Anyone!**

A particle moves along the x-axis with position at time t given by x(t)=e^(-t)sin(t) for 0 is less than or equal to t which is less than or equal to 2 pi. a) Find the time t at which the particle is farthest to the left. Justify your answer I think you have to find the prime ...
*November 29, 2010 by Leanna*

**ALGEBRA again still need help !**

need help solving this word problem, converting from words to an equation 48 equals a number increased by 6, and the sum, all multiplied by 5. I have the answer, but I am unable to set up an equation. answer - x=3 3/5
*October 9, 2008 by Rose*

**english 2**

I need to create a list of power shifts, starting from the opening scene of Act I. It's supposed to follow the exchange of power throughout the play. I have read the play two times already and still need help.
*February 8, 2011 by taylor*

**Calculus**

Hi there, I need help with composition of functions. I need to find fog, gof, gog, and fof and their domains for the following: f(x) = square root of 2x +3 g(x) = x^2 + 1 if someone can help me asap that would be so great!
*January 21, 2009 by Lola*

**calculus**

i need to find the derivative using chain rule and show steps: y= (x) / ((x^2)-1)^(-1/2) and is it possible to have free tutoring online like through a chatroom? i am in need of help
*January 10, 2014 by eric*

**math-calculus**

30/x^2-25 = 3/x-5-2/x+5 i be left with 30 = 3x^2-75-2x^2+50 i not sure what to do? i use the quadratic formula? math-calculus - Steve, Saturday, January 7, 2012 at 3:38pm First, you have to simplify properly: 30/(x^2-25) = 3/(x-5) - 2/(x+5) 30 = 3(x+5) - 2(x-5) You were ok ...
*January 7, 2012 by Shreya*

**Math**

Need to make a monthly amortization schedule. Borrowing 16000 over 4 years at 3.5%. Do I need to calculate for 48 months in order to do this project correctly? I do all the calcs for 48 months and I still end up with approx a payment left over?
*June 15, 2012 by Lori*

**calculus**

i'm having trouble with a problem in my calc class...it isn't really calculus yet since we're still in the review section but it goes somethign like this: ( don't have it in front of me) a rational function is defined by: R/(x-K) where R and K are constants. find R and K for a...
*March 15, 2007 by Rob*

**physics**

thanks for the help earlier just got a question I'm taking AP Physics B this year does that mean next year I would Take AP Physics C??? I don't know if the material in C convers the same material plus the additional calculus material or what??? Could I take AP Calculus while ...
*August 9, 2009 by physics*

**Calculus **

There is this improper integral problem I've been given. I've completed most of it but still don't understand what I'd get, I don't quite get what it means to go from 'e' to 'infity'. What would I get? -ln(x)+1/x from 'e' to 'infinity' + -1/x from 'e' to 'infinity'.
*July 12, 2013 by Isaac*

**Algebra**

3{[3(x-5)15]-[3(4x-3) +3]} I need help to simply this. I have been working on this for 2 hours and still don’t get it, can anyone help?
*April 25, 2010 by Lori*

**Math**

3{[3(x-5)15]-[3(4x-3) +3]} I need help to simply this. I have been working on this for 2 hours and still don’t get it, can anyone help?
*April 25, 2010 by Lori*

**English**

Do i need a comma? Do you still have relatives living there Kate?
*January 30, 2011 by Sally*

**to ms.sue**

I still don't get it. do we divide every # by 2. why do we need to move 2 decimal spaces?
*April 9, 2012 by Celest*

**math **

I still need to show my work for the days and years please help me. Thank you.
*August 7, 2012 by Anonymous*

**Calculus still confused**

Find the length in the first quadrant of the circle described by the polar equation r=(2 sin theta)+(4 cos theta) A. (sqrt2)(pi) B. (sqrt5)(pi) C. (2)(pi) D. (5)(pi)
*November 22, 2011 by Tracy*

**English**

I urgently need you to check these sentences on the present perfect. Thank you. 1) I've just come back from the studio where we were rehearsing/practising(exercising/training are mistakes?).Is "we practised" possible? 2) I still haven't spent my time listening to music. I ...
*April 17, 2012 by Matthew*

**science**

i still need a few more facts about the past atmosphere
*March 17, 2009 by anonymous*

**Re:Career**

I still need one more job from my previous question please and thank you
*April 22, 2009 by Tony*

**calculus**

Need help with the following proof: prove that if lim x->c 1/f(x)= 0 then lim x->c f(x) does not exist.I think i need to use the delta epsilon definition i am not sure how to set it up.
*July 26, 2009 by jeff*

**CALCULUS!!! tangent lines**

If f(2)=4 and f'(2)=3, use the line tangent to the graph of f at x=2 to find a linear approximation for f(1.992) HELP! The only one I need, I need a Genius!!!!
*March 23, 2010 by Anonymous *

**history**

i found most of my questions. i still need to know to be civilized (according to historians) what has to be present?
*September 8, 2008 by jerson*

**English 9 MS. SUE**

i still need help: the conflict is character vs charcater how would i say what caused it?
*November 12, 2012 by Jules*

**Geography**

When doing world maps on climate zones and elevation, do we still need to color the ocean?
*August 27, 2014 by Kyralle*

**Math**

Angela and Doreen each want to by the same comb. Angela still needs 58cents to by the comb and Doreen still needs6cents. If they were to combine their money, they still do not have enough. What is the most the comb could cost?
*November 5, 2014 by Meena*

**Pre-Calculus**

For the function f(x)=3x^3−42x Compute the difference quotient [f(x+h)−f(x)]/h,h≠0 I checked my work like 3 times and still got [(-2x^3)+(3hx^2)+(3xh^2)+(h^3)-(42h)]/h Is it wrong?
*October 7, 2013 by Ann*

**Calculus**

A curve is defined by the parametric equations: x = t2 – t and y = t3 – 3t Find the coordinates of the point(s) on the curve for which the normal to the curve is parallel to the y-axis. You must use calculus and clearly show your working, including any derivatives you need to ...
*July 18, 2014 by Daksh*

**Math**

Find the slope of 8x+4y=7 in parallel and perpendicular lines. Please help me figure this out? Still need help
*July 28, 2014 by Natalie*

**HUM 130**

i need to find 2 URL web sites dealing with indigenous culturals and/or religions. Then I need to discuss how modern civilization has impacted the spiritual lives of the indigenous peoples you explore. Are indigenous religions still practiced today? If they are how has the ...
*November 17, 2007 by dawn*

**Pre-Calculus**

convert to the alternate form to exponential form. a) 5^4=625 b) e^x=y c) log.001=x I really need help on these problems i have no idea how to do it? pls help me i need to study for it on my exam.
*December 6, 2013 by Lane*

**Calculus**

Determine the points of inflection of the function. f(x) = x + sin x (−2π ≤ x ≤ 2π) I'm still completely confused
*March 30, 2011 by Starr*

**SraJMcGin are you still here**

I'll post my finished work when you answer me that you are still online
*March 29, 2009 by Destiny*

**Calculus/Substitution**

The integral from 1 to 2 of x*the square root of (x-1) dx. Using the substitution method, I said that u = x-1, du = 1 dx, and dx = du. I'm not sure how to plug u back into the equation since I still have that first x. Suggestions are greatly appreciated.
*July 12, 2009 by Amy*

**calculus**

Nikki is driving a motorboat across a river that flows at 5 m/s. The motorboat has a speed of 12 m/s in still water. She heads out from one bank in a direction perpendicular to the current. How far does she travel in 3 minutes?
*August 16, 2014 by Liz*

**Chemistry**

Determine the unknown quantity in the following cell at 298.15 K. Pt(s) | H2(g, 1.0 bar)| H+(pH = ?) || Cl -(aq, 1.0 mol·L-1) |AgCl(s), Ag(s), ΔE = +0.36 V. (DrBob) I still wasn't able to figure out the other one--I posted again after that one, but I know there are a lot ...
*March 29, 2010 by Val*

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