Thursday

April 17, 2014

April 17, 2014

Number of results: 61,934

**Calculus I**

This post was also placed at freemathhelp, on the calculus board with titled, "Calculus I". No work is shown at either location. Sad.
*Tuesday, September 2, 2008 at 4:53pm by Mark*

**Calculus 2**

Calculus work problem. John bought the following corner lot. Two sides are bounded by 2 roads the back is bounded by a stream that follows the curve y = -x^3 + 8. He wants to build a house in the center of the lot. Where will that be? Please show all work
*Thursday, September 27, 2012 at 5:35pm by Laura*

**Physics (Please)**

Newton ponder all this, and had to invent calculus to explain what was happening. Hold your questions until calculus, you will get the answer there. Work is in calculus terms, the integral of force *dx integrated over the path. Remember that, then in calculus, all your terms ...
*Monday, October 19, 2009 at 8:29pm by bobpursley*

**calculus(work)**

a rectangular water tank has a length 20 ft, width 10 ft , and depth 15 ft . if the tank is full , how much work does it take to pump all the water out (using calculus)?
*Saturday, April 2, 2011 at 3:05pm by tony*

**calculus**

First of all, it is spelled calculus. Next, show your work so that we know where you need help. Okay?
*Sunday, February 17, 2008 at 7:11am by Guido*

**Physics, Calculus(alot of stuff together)= HELP!!!**

Can someone please check my Calculus work and see if it is correct? THANK YOU =D
*Sunday, September 16, 2007 at 7:12pm by ~christina~*

**Calculus**

Let x+3 be u. y=400*2^u y'=400*2^u*ln(u)*du/dx You need to start posting some work or thinking. Our critiquing your work is much more value to you than your seeing someone else set up the problems or do the work.
*Friday, June 6, 2008 at 5:41am by bobpursley*

**calculus, limits, l'hopital**

You're very welcome. Keep up the good work. Calculus is best learned with lots of practice.
*Sunday, February 13, 2011 at 3:08pm by MathMate*

**physics**

find the difference in PE in the two locations. Hold one charge stationary. PEtotal= kQQ/.1 PE(new total)=KQQ/.06 subtract the first from the second, that must equal the work done. There are more difficult ways to work this, involving finding work in an integral calculus ...
*Sunday, March 30, 2014 at 12:45am by bobpursley*

**calculus**

This is not calculus, it is vector math. Work it as a Algebra II vector problem, breaking it into components. Most in the real world of navigation would do this graphically.
*Wednesday, May 5, 2010 at 7:01am by bobpursley*

**calculus**

Work= INT Fdx = INT GMeMs/x^2 dx integrate from re to re+800,000m I will be happy to check your work.
*Tuesday, February 3, 2009 at 6:42pm by bobpursley*

**Calculus (check my work)**

You realize I'm a terrible Calculus student? I don't understand the concepts that the other students can pick up on right away. I don't really get why you did any of what you did, and there aren't any examples like this one in our book for me to look back on.
*Tuesday, December 17, 2013 at 6:52pm by Lindsay*

**calculus**

prove that 5x - 7 - sin3x = 0 has at least one zero and prove that it has exactly one real zero. How am I supposed to show my work for this? I don't really understand how to show my work for the IVT. Without that I can't do any work for the MVT.
*Friday, December 16, 2011 at 1:46am by Rob*

**college Physics**

work done is integral Fdotdx INT (3.99x)dx= 1/2 3.99x^2 over limits, or work= 1/2 3.99 (4.45)^2 I am assuming you are taking calculus.
*Thursday, October 28, 2010 at 9:37pm by bobpursley*

**Calculus**

No, not true for all integrals. But if you are looking for something that only has magnitude, you have to split the integrals, as the area below the axis is NEGATIVE. On things like vector work (force*dx), the negative would mean work being absorbed, so it might be useful to ...
*Friday, December 18, 2009 at 1:56pm by bobpursley*

**calculus help work**

a force of 1250 pounds compresses a spring 5 inches from its natural length. find the work done in compressing the spring 8 additional inches. f=kd 1250=k5 k=250 then what do i do. i have to do this the calculus way, not the physics way. by using integrals the answer choices ...
*Monday, January 8, 2007 at 8:56pm by david*

**Physics - work done**

You did not state in which direction the force acts. I assume in the direction of displacement. Work done will be the area under the graph FvsD. sketch the graph (F=kd is a straightline) c) Using calculus, work=integral f.dx= = int kx dx= 1/2 x^2 You should get this by ...
*Wednesday, October 6, 2010 at 6:20am by bobpursley*

**Calculus 2**

Calculus 2. Tom and Mike have a bet as to who will do the most work today. Mike has to compress a coil 200 feet. It takes Mike 250 lbs to compress the coil 10 feet. Tom needs to pump water through the top of a cylindrical tank sitting on the ground. The tank is half full, has ...
*Thursday, September 27, 2012 at 8:34pm by Laura*

**calculus**

<<or does x=0 not work because x does not equal zero on the point (1,0)? >> It does not work because x is not 1 at y = 0, where they want the limit evaluated.
*Tuesday, February 28, 2012 at 2:30am by drwls*

**Calculus**

Let f (x) = 5x^2 9 and g(x) = x 3. (a) Find the composite function ( f o g)(x) and simplify. Show work. (b) Find ( f o g)(2) . Show work.
*Saturday, March 10, 2012 at 2:43pm by Brian*

**calculus**

Find any relative extrema and any points of inflection if they exist of f(x)=x^2+ ln x^2 showing calculus. Please show work in detail so I can follow. Thanks. The answer is no relative max or min and the points of inflection are (1,1) and (-1,1) but I'm having trouble getting ...
*Saturday, May 4, 2013 at 1:12pm by Rene*

**calculus**

it doesn't work
*Friday, November 5, 2010 at 2:42pm by ashley*

**physics**

It takes 5.28 J of work to stretch a Hookes Laq spring 9.82 cm from its unstressed length. How much extra work is required to stretch an additional 11.9 cm? anwser in J Figure the Potential energy at 11.9, and at 9.82cm. The difference is the energy that stretched the spring. ...
*Thursday, April 12, 2007 at 5:44pm by hannah*

**calculus**

1) Integrate (e^x+x)^2(e^x+1) dx 2) Integrate xe^x2 dx Let u=(e^x+x) du=(e^x +1) dx I will be happy to critique your work or thinking. You are posting work for me to do, and I am not inclined to do that, it will not help you for me to do it. I think I gave you strong hints on ...
*Friday, April 13, 2007 at 11:22am by Febby*

**Physics**

No on the first. If you are in calculus, work= INT fdx=INT kxdx= 1/2 k x^2 eval at the limits .2 to .25 Same thing on the second. If you are not in calculus, the energy stored in a spring is 1/2 kx^2. You have to evaluate the stored energy at each point, and take the difference.
*Wednesday, October 17, 2007 at 5:07pm by bobpursley*

**calculus**

never mind. i thought about it and it is the work done by gravity. not the man. which leads me to another question. how exactly would you find the work done by the man. would he be represented as another vector or or in the vector field?
*Monday, April 16, 2012 at 11:08pm by Bryant*

**Calculus**

Good work Michael, thanks.
*Sunday, November 25, 2007 at 7:20pm by bobpursley*

**calculus**

I will be happy to critique your work.
*Friday, October 16, 2009 at 11:44am by bobpursley*

**Calculus Work**

Subject added
*Monday, January 11, 2010 at 7:24pm by Mike*

**calculus**

I will be happy to critique your work on this.
*Sunday, October 17, 2010 at 6:04pm by bobpursley*

**Calculus**

I will be happy to critique your work.
*Monday, October 18, 2010 at 7:41pm by bobpursley*

**calculus**

nice work, Mgraph.
*Thursday, April 21, 2011 at 9:23pm by bobpursley*

**Calculus**

Oh and show the work please!
*Sunday, February 26, 2012 at 12:23pm by Labiba*

**Calculus - please check my work**

thank you!
*Monday, June 18, 2012 at 5:55pm by Lenna*

**Calculus - please check my work**

thank you
*Monday, June 18, 2012 at 5:48pm by Henry*

**Calculus - please check my work**

thank you
*Tuesday, June 19, 2012 at 12:26am by Henry*

**Physics**

I assume you have calculus. g is changing, so we have to use calculus. Work= INT Force*dx = INT GM3m/distance^2 dx integrated from radEarth to 2500km+radEarth.
*Sunday, November 9, 2008 at 4:48pm by bobpursley*

**calculus**

Quadratic function written in standard form where a, b, and c are constants such that a is not zero. f(x)= ax^2+bx+c Using calculus find the vertex of the parabola formed by this quadratic function. Determine under what conditions this vertex is a maximum or minumum (using ...
*Sunday, May 8, 2011 at 11:34pm by Janet*

**calculus**

does weight vs. eating work too?
*Monday, August 27, 2007 at 8:56pm by Anonymous*

**Calculus**

f(x)=3u^-1 where u=x-2 We will be happy to critique your work.
*Tuesday, October 21, 2008 at 7:35pm by bobpursley*

**calculus**

I tried the integral from 1 to e of 1-lnx^2 but that doesn't work.
*Monday, January 25, 2010 at 8:55pm by Bob*

**calculus**

I tried 3 for both (a and b) as a maximum and didn't work....
*Sunday, March 13, 2011 at 11:10pm by Abdullah*

**Calculus**

I will be happy to critique your work here.
*Sunday, October 30, 2011 at 7:36pm by bobpursley*

**Calculus **

Graph f(x) = 4^(x - 1) Please show work
*Sunday, November 6, 2011 at 10:43pm by Brett*

**Calculus **

Differentiate f(x)=(x^(3)-8)^(2/3) Please Show Work
*Sunday, November 6, 2011 at 10:47pm by Brett*

**calculus**

solve the inequality e^x+e^x-x=6 can you show work
*Sunday, January 6, 2013 at 3:23pm by Heather*

**Calculus**

the curves intersect at (-1,1) and (6,36) The x-line rotations all work the same way. Shells probably work best: v = ∫[-1,6] 2pi * r * h dx where r is 6-x or 1+x and h = (5x+6)-x^2 simple polynomial for the y-line axes, maybe discs work best, but you'll have to use ...
*Sunday, September 16, 2012 at 2:16pm by Steve*

**physics**

Here is one way to do this. I assume you are in calculus. Lets pretend we can do this charge by charge. First charge: work done=INT force dx from x=.03 to inf where force=kq2q1/x^2 integrate it over that domain of x. So that is the energy this partical has. SEcond charge. Now...
*Friday, March 8, 2013 at 6:34pm by bobpursley*

**Calculus**

Does my answer look correct? Find the derivative. 11, y= (e^3-e)(e+5)/6e my work: ((6e)(4e^3 + 15e^2 - 2e - 5) - (6)(e^4 + 5e^3 - e^2 - 5e))/ (6e)^2 Multiplied/divided everything through My answer: (10e^2 + 30e - 3)/ 18 I cant follow your work: I assume e is a derivative. (e^3...
*Tuesday, December 19, 2006 at 6:58pm by Alexandra*

**PHYSICS**

Stella, I assumed that you have had calculus. If you have not, then your book must say something like: For an ideal gas: With compression at constant temperature, work in = (n R T) ln (V1/V2) or With compression at constant temperature heat out = (n R T) ln (V1/V2) Since ...
*Sunday, March 2, 2008 at 7:23pm by Damon*

**Science**

Work or no work? Work=ForcexDistance 1. A person holding a box of potatoes. No work 2. A batter holds his bat at his side while waiting for his turn to play. No work 3. Your sister carries home her books from school. No work 4. You push a box from point A to point B along the ...
*Tuesday, February 4, 2014 at 6:57pm by Jerald*

**Math--Calculus**

I will be happy to critique your thinking or work.
*Monday, November 12, 2007 at 3:14pm by bobpursley*

**calculus**

find all x,y intercepts of x+6/x-3 show work
*Tuesday, September 30, 2008 at 5:14pm by ron*

**calculus**

find all intercepts x^2-4/x-1 show work
*Tuesday, September 30, 2008 at 5:16pm by ron*

**integral calculus**

I dont get that. I will be happy to examine your work.
*Tuesday, October 7, 2008 at 11:45am by bobpursley*

**Calculus**

Yes, it's 9x^2 y^2 where I had a coefficient of 6. Good work!
*Monday, February 9, 2009 at 5:18am by drwls*

**Calculus**

Can you please explain how to work it because I still cannot understand.
*Sunday, February 22, 2009 at 11:30am by Claire*

**calculus**

thank you...I was able to work through all the steps with your help!
*Saturday, March 7, 2009 at 8:32am by dolphin1384*

**calculus**

differentiate y=x^2x. show all work
*Tuesday, February 23, 2010 at 9:42pm by Anonymous*

**Calculus**

Thank you. Can you tell me how to actually work the problem, too? Thanks again!
*Tuesday, September 7, 2010 at 11:28pm by Hannah*

**Calculus**

Correct, keep up the good work!
*Tuesday, September 21, 2010 at 8:53pm by MathMate*

**calculus**

I will be happy to critique your work. this is incredibly easy.
*Sunday, March 20, 2011 at 7:29pm by bobpursley*

**calculus**

I think so. but im at work and cant make it before the test.
*Tuesday, June 28, 2011 at 11:26am by a*

**Calculus - please check my work**

All correct, well done!
*Monday, June 18, 2012 at 5:48pm by MathMate*

**Calculus - please check my work**

All correct!
*Monday, June 18, 2012 at 5:55pm by MathMate*

**calculus help plz**

work= force * distance, so you can set up an integral to solve for work F=k*x, k=250 force =250x distance =dx so then you integrate(250x)dx from 0->(5+8)=21,125 idk if its right but its an awnser choice
*Monday, January 8, 2007 at 11:05pm by B*

**calculus**

Marlyn: I removed your someone post. What drwls is saying, it appears that you are answer grazing, you show now work on a variety of topics, not indicating what you dont understand about the question. Surely you know something..that is our starting point for teaching. We cant ...
*Sunday, December 6, 2009 at 5:41pm by bobpursley*

**pre-calculus-check over work**

all correct.
*Monday, April 21, 2008 at 10:21am by bobpursley*

**calculus**

do this with the d(uv)/dx procedure. We will be happy to critique your work.
*Friday, November 7, 2008 at 8:58pm by bobpursley*

**calculus**

Lim= x-Infinite x+0/(x2+1)=? please show work
*Wednesday, November 3, 2010 at 7:45pm by tim*

**Calculus some1 plz!!!!**

sadly, it didnt work :( thanks for trying
*Monday, March 14, 2011 at 7:47pm by yolana*

**Calculus**

Thank you so much this definitely helps me double check my work!!
*Monday, April 18, 2011 at 1:28am by Amie*

**Calculus**

Find the derivative of f(x) = x^3 Show all the work please and thank you!
*Sunday, February 26, 2012 at 3:42pm by Steph*

**calculus**

I will be happy to critique your work here. These are standard formulas.
*Thursday, April 26, 2012 at 12:50pm by bobpursley*

**calculus**

It's a Maclurian Series (a=0) so your work is just 35/1!+4/2!= 37.
*Thursday, September 30, 2010 at 9:37pm by Anonymous*

**calculus**

find the rate of change of f(x)=x^2+4 a. from -2 to 0 b. from 1 to 3 c. from -2 to 1 pllease show work
*Saturday, December 15, 2012 at 10:06pm by Help--Please help!!!!*

**calculus**

Please show your work so corrections can be pointed out.
*Saturday, September 7, 2013 at 1:24am by Graham*

**Calculus**

Really a physics question. I know that Work = Force x distance.
*Saturday, December 14, 2013 at 8:13pm by Reiny*

**Pre-Calculus**

y = 6 x + 4 through point (0,4) slope = 6 well (0,4) + (1,6) t should work
*Monday, March 3, 2014 at 5:46pm by Damon*

**Pre Calculus**

work on the right side RS = 1/cos(π/6 - x) = 1/)cosπ/6cosx + sinπ/6sinx) = 1/(√3/2cosx + 1/2sinx) = 2/(√3cosx + sinx) did you make a typing error? I tested your equation for some value of x, it did not work out, mine did.
*Thursday, April 22, 2010 at 1:27pm by Reiny*

**Calculus Help Please!!!**

I am going to assume it is algebra first take t = 0 at 1:30 T = Ti - k t Ti = 32.5 so T = 32.5 - k t 30.3 = 32.5 - k (1 hour) k = 2.2 so T = 32.5 - 2.2 t 37 = 32.5 - 2.2 t t = - 2.04 call it 2 hours so by that linear model 11:30 am now I will work on the more realistic ...
*Thursday, March 27, 2014 at 8:16pm by Damon*

**Physics**

I assume you are a calculus based physics student. Work= INTEGRAL Forcegravity.dr = INT from re to re+1007,000m of (GMe*95)/r^2 * dr evaulated over limits. Now the additional work to go into orbit: 1/2 mv^2, where v^2=GMe/(re+1007,000)
*Monday, March 21, 2011 at 3:26pm by bobpursley*

**Calculus please help!**

Here is the answer I gave to the same question yesterday: ============================ I would graph x versus t^2 but is that correct? Thank you very much! * Math/Calculus - Damon, Friday, July 2, 2010 at 8:36pm Sure, that will work. You could also use a sheet of graph paper ...
*Saturday, July 3, 2010 at 11:58am by Damon*

**Calculus**

Is x^2 - 2x 1 to 1? I keep getting yes every way I try to work it. Book says no. In the end, I get (with x1=1 and x2=-1 <- I use these numbers because of the x^2) f(x1) = -1 and f(x2)=3. I can't seem to find if x1 = x2 (btw, I know that by the graph it is not, but I am ...
*Friday, June 25, 2010 at 2:04am by Elisabeth*

**Calculus**

f(x) = 4- 2|x-2|/(x-2) ; f(2) = 2 which is the same as f=6 (x<2) f=2 (x >or= 2) There are other functions that would work.
*Sunday, July 4, 2010 at 11:03pm by drwls*

**Calculus**

Doesn't this simply to 8*z -4 z - 2z + z = k z You need to show some work or thinking.
*Monday, October 1, 2007 at 8:04pm by bobpursley*

**calculus**

integrate (x+2)/((x^2+2x+4)^2) the usual partial fractions dont work???
*Monday, March 3, 2008 at 4:31pm by matt*

**Pre-Calculus**

I get the same result as you, and checked my work. I have no explanation
*Thursday, July 24, 2008 at 7:15pm by drwls*

**pre-calculus**

thank you for your time and work. i really appreciate it. god bless you.
*Saturday, March 13, 2010 at 8:35pm by hawra*

**Calculus**

what is Trapezoidal rule? How does it work in finding the area under the curve(s)?
*Tuesday, November 30, 2010 at 2:06pm by prakash*

**Calculus **

Find The Derivative y= 9e^(x)/ 2e^(x)+ 1 Please Show Work
*Sunday, November 6, 2011 at 10:44pm by Brett*

**Calculus **

Find The Derivative y=5x^(2)e^(3x) Please Show Work
*Sunday, November 6, 2011 at 10:46pm by Brett*

**pre-calculus**

solve equation show work. log_2(x^2+47)=7
*Wednesday, January 11, 2012 at 7:24pm by Sara*

**calculus**

How do you find the points of continuity for F(x) = sin(x^2-2) ? Can you show your work? Thx
*Wednesday, January 18, 2012 at 11:16pm by saphire*

**Calculus**

Sorry for the confusion. May I ask why my answer does not work? :S its asking for the vertices, not equal to Point P.
*Tuesday, March 27, 2012 at 10:06pm by Jake*

**calculus please help me**

find derivative of: f(x)=e^2 I know that b/c e is a constant the answer is 0, but how do I show that in my work?
*Sunday, October 7, 2012 at 11:21pm by erica*

**calculus**

If (a,-12) is a point on the graph of y=x^2+7x, what is a? please show work
*Tuesday, December 4, 2012 at 8:36pm by Heather*

**Physics**

workapplied=39cosine22.6*1m= work doneonbook= 1/2* 4 *1.75^2 work friction= work applied-work done
*Wednesday, July 18, 2012 at 8:06pm by bobpursley*

**Chemistry I**

For the methanol combustion reaction 2CH3OH(â) + 3O2(g) ----> 2CO2(g) + 4H2O(g) estimate the amount of P [change]V work done and tell whether the work was done on or by the system. Assume a temperature of 27âŚC. 1. 2.5 kJ, work done by the system 2. 2.5 kJ, work done on ...
*Thursday, July 1, 2010 at 9:04pm by Anonymous*

**Physics**

1. No The train does work; the wagon has work done on it. 2, Negative net work ON an object is work done BY that object against another force. When negative work is done ON an object, its kinetic energy may decrease, but not necessarily. The work done can be converted to other...
*Saturday, October 27, 2007 at 9:44pm by drwls*

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