Friday

July 25, 2014

July 25, 2014

Number of results: 30,024

**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)?
*April 2, 2011 by tony*

**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
*September 27, 2012 by Laura*

**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 ...
*January 8, 2007 by david*

**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...
*December 19, 2006 by Alexandra*

**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.
*December 16, 2011 by Rob*

**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 ...
*April 13, 2007 by Febby*

**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. ...
*April 12, 2007 by hannah*

**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 ...
*June 25, 2010 by Elisabeth*

**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 ...
*September 27, 2012 by Laura*

**Pre-Calculus**

How do you work this problem. I cannot find an example in the book to illustrate how to work it. Find the value of tan(a-b) if cos a=-3/5, sin b=5/13, 90<a<180, and 90<b<180 Thanks for any help
*August 30, 2008 by Lucy*

**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 ...
*May 4, 2013 by Rene*

**calculus (gr 12)**

the productivity of a person at work (on a scale of 0-10) is modeled by a cosine function: 5cos (pie/2t) +5, where t is in hours. If the person starts work at t=0, being 8:00 am, at what times is the worker the least productive? a) 12pm B) 10 am and 2pm C) 11 am and 3 pm D) 10...
*May 14, 2013 by Maria*

**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 ...
*May 8, 2011 by Janet*

**Calculus**

If 6 J of work is needed to stretch a spring from 10cm to 12 cm and another 10 J is needed to stretch it from 12 cm to 14cm, what is the natural length of the spring? This is a physics problem as much as a calculus one. Solve for the spring constant k first, then determine ...
*October 10, 2006 by Shayn*

**calculus(equating coefficients)**

Can somebody explain to me why equating coefficients work? Example: 8x^3+13x = Ax^3 + 2Ax + Bx^2 + 2B + Cx + D expanded into: 8x^3 + 13x = Ax^3 + Bx^2 + (2A+C)x + 2(B+D) where A,B,C,D are constants. Why does 8 = A; 0 = B; 13 = 2A + C; etc. I know they have same power variables...
*June 6, 2011 by Jay*

**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.
*March 10, 2012 by Brian*

**calculus**

differentiate y=x^2x. show all work
*February 23, 2010 by Anonymous*

**Calculus **

Graph f(x) = 4^(x - 1) Please show work
*November 6, 2011 by Brett*

**Calculus **

Differentiate f(x)=(x^(3)-8)^(2/3) Please Show Work
*November 6, 2011 by Brett*

**calculus**

solve the inequality e^x+e^x-x=6 can you show work
*January 6, 2013 by Heather*

**calculus**

find all x,y intercepts of x+6/x-3 show work
*September 30, 2008 by ron*

**calculus**

find all intercepts x^2-4/x-1 show work
*September 30, 2008 by ron*

**calculus**

Lim= x-Infinite x+0/(x2+1)=? please show work
*November 3, 2010 by tim*

**Calculus **

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

**Calculus **

Find The Derivative y=5x^(2)e^(3x) Please Show Work
*November 6, 2011 by Brett*

**calculus**

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

**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 ...
*July 1, 2010 by Anonymous*

**calculus**

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

**calculus**

find the horizontal tangents of the curve and show work y=5x^3-3x^5
*October 12, 2011 by Millie*

**calculus **

find the work done in winding up a 175 ft cable that weighs 4.00 lb/ft?
*November 28, 2011 by seth *

**pre-calculus**

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

**Calculus**

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

**Calculus**

Does the line [x,y,z] = [-2,6,5] + t[3,2,-1] lie in the plane 3x - 4y + z + 25 = 0 ? Please show work.
*May 5, 2012 by J*

**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 please show work
*December 13, 2012 by confused--please help*

**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
*December 15, 2012 by Help--Please help!!!!*

**calculus help**

find y' and y'' for the equation below. Show work please!!! y= (x^3)/((x+1)^2)
*April 16, 2014 by Antony*

**Calculus**

Given f(x) = csc^4(5x^2-3x+1), find f'(x). Show all work.
*June 23, 2014 by Bob*

**calculus help plz**

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. the answer choices are: a.3250 b.21,125 c.18000 d.2000 e. none of these Work = (1/2)* F * ...
*January 8, 2007 by david*

**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 ...
*February 4, 2014 by Jerald*

**calculus**

Iamhaving a really hard time trying to understand this question. Can someone please show me how to work this question. Give the following polynomial, find a. the zeros and the multiplicity of each b. where the graph crosses or touches the x-axis c. number of turning points d. ...
*December 18, 2012 by Sammy-Please,please help!!!!*

**Calculus (Definite Integrals - Work)**

Recall that work is defined to be force times distance, and that the weight (force) of a liquid is equal to its volume times its density. A fish tank has a rectangular base of width 2 feet and length 6 feet and sides of height 5 feet. If the tank is filled with water weighing ...
*March 12, 2012 by Mishaka*

**Calculus**

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

**calculus**

Find the derivative of the function. 1. 2x+5/3x-2 2. (1-x)(1+x^2)^-1 Please show work. TYVM. :)
*September 11, 2011 by Matthew*

**calculus**

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

**calculus 2**

find the indefinite integral showing all work. x^3(x^4-11)6dx
*February 16, 2012 by sean*

**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?
*October 7, 2012 by erica*

**calculus**

find the equation of line L. L is parellel to y=4x show work pleaase..
*December 9, 2012 by Holly*

**Calculus**

If f(x1)>f(x2) for every x1>x2, then what is the behaviour of f(x)? I believe that the answer is that f(x) is increasing but I do not know how to show my work for that
*May 15, 2014 by Liz*

**Calculus III**

I'm supposed to find the expression 'y', when (x^2+100)y'=23 When y(10sqrt(3))=0 Also, I have to find the indefite integral of xsqrt(19x-7), using integration tables in teh back of the book "Calculus of a Single Variable, 8th Edition." Tables are in appendix B I used the ...
*March 16, 2008 by Sean*

**per- calculus**

Parrallel to the line 4x+3y=3; containing the points (6,0) a)3x-4y=-24 b)4x+3y=24 c)4x+3y=18 d)3x-4y=18 show all work
*October 4, 2007 by Neshia*

**Calculus**

what is the limit as x goes to 1- of (arcsin(x) - pi/2 ) / sqrt(1-x) ? I tried using L'Hopital's and it doesn't work.
*December 1, 2008 by Shaniquaa*

**Calculus**

Differentiate: F(x)=e^(xsin2x) This isn't homework, it's review for our exam. Couldn't remember how to work it :( Thanks!
*May 18, 2010 by Katie*

**Calculus**

find the limit as x approaches zero of (3sin2x)/sin7x and show work
*October 18, 2011 by Tina*

**Calculus**

find the limit as x approaches zero of (3sin2x)/sin7x and show work
*October 18, 2011 by Millie*

**Calculus**

find the limit as x approaches zero of (3sin2x)/sin7x and show work is it 6/7?
*October 18, 2011 by Millie*

**pre calculus**

Write the expression below as a single logarithm. Need to know how to work this! ln(x-5/x^2 - 1) - ln (x^2 - 2x -15/x + 1)
*December 17, 2011 by James*

**Calculus**

For the following function, state the derivative and evaluate f'(4): f(x) = x Please show your work! Thank you!!
*February 25, 2012 by Labiba*

**Calculus**

Find dy/dx by implicit differentiation. x^3 - 3x^2y + 2xy^2 =12 Please show me the work/steps on how to do it.
*October 3, 2012 by Guest*

**calculus**

for the function f(x)=5/x+4, find the average rate of change of f from 1 to x. please show work
*December 13, 2012 by Heather*

**calculus**

solve the inequality algebraically 7x-6 less than or equal to 3x^2 please show work
*December 27, 2012 by Kyrstal*

**Calculus **

(i) A 20m chain with a mass-density of 3kg/m (coiled on the ground). How much work is performed lifting the chain so that it is fully extended (and one end touches the ground)? (ii) How much work is performed to lift 1/4 of the chain?
*May 12, 2014 by T*

**Calculus **

(i) A 20m chain with a mass-density of 3kg/m (coiled on the ground). How much work is performed lifting the chain so that it is fully extended (and one end touches the ground)? (ii) How much work is performed to lift 1/4 of the chain?
*May 12, 2014 by HELP ASAP*

**Pre-Calculus/Calculus**

I am too embarassed to ask this Calculus (really pre-calculus) question in tutoring, because I know I should know. Is the inverse of f(x)=3x-1 actually f(x)=1/3x+1? How do I find it? What if it asks the same equation replaced with f to the -1 power (x)? I think I know how the ...
*July 1, 2008 by Molly*

**Calculus**

1. 10=6e 0.5t 2. 100=25(1.5)t We will be happy to try to critique your work or thinking. I have no idea what your question is.
*July 13, 2007 by Rumbunz*

**calculus**

f(x)=(9x^28)^6(4x^25)^11 Find f'(x) I got (9x^2-8)^6 *11(4x^2-3)^10*8x+((4x^2-3)^11)6(9x^2-8)^5(18x) but im doing something wrong can someone check my work please
*April 30, 2008 by John*

**Calculus**

Solve for x. Don't do the work using algebra and don't use a calculator. The Laws of Logarithms will be helpful. ln(x^2 - 1)= 3
*October 5, 2011 by Angel*

**Calculus**

Use the first principles definition to differentiate y = 5x^2. Please show all your work!
*February 26, 2012 by Steph*

**Calculus**

Determine the work done by the force F = [1, 4], in newtons, for an object moving along the vector d = [6, 3], in meters.
*June 19, 2012 by Yun Gao*

**calculus**

Plot the points and determine the slope of the line containing them (-7,-4);(8,-4) please show work
*December 7, 2012 by Holly*

**Calculus (check my work)**

Find the marginal revenue at x=10 using the equation R(x)=-x^2+80x Is the answer 60?
*December 7, 2013 by Lindsay*

**Calculus Help**

Find the derivative of the following function showing your work and fully simplifying your answer. f(x)=(8x-3)^5/(6x+7)^12 Thank you!!!
*March 11, 2014 by Layla*

**Calculus**

if the work required to stretch a spring 1 ft beyond its natural length is 12 ft-b, how much work is needed to stretch 9 inches beyond its natural length?
*April 30, 2014 by Rachel*

**calculus**

Eight and one-half foot-pounds of work is required to compress a spring 3 inches from its natural length. Find the work required to compress the spring an additional one-half inch. (Round your answer to two decimal places.)
*January 25, 2012 by fgm*

**calculus**

A trough has a trapezoidal cross section with a height of 5 m and horizontal sides of width 2.5 m and 5 m. Assume the length of the trough is 14 m. How much work (in joules) is required to pump the water out of the trough (to the level of the top of the trough) when it is full...
*July 23, 2012 by Zac*

**calculus 2**

Six and one-half foot-pounds of work is required to compress a spring 3 inches from its natural length. Find the work required to compress the spring an additional one-half inch.
*May 31, 2011 by brittney*

**Pre Calculus**

I keep trying to solve this by factring but I can't seem to get! It's so frustrating! The problem is 1+tan2x=0 This is how I worked the problem before: 1+((2tanx)/(1-tan^2x))=0 ((2tanx)/(1-tan^2x))= -1 Then I cross multiplied to get: -1 + tan^2x = 2 tanx Than I rearranged ...
*April 11, 2013 by Jen*

**integral calculus**

can anyone give me a site that best explain about the topic "work" and "center of moment"... thanks... :)
*October 7, 2008 by Akitsuke*

**calculus**

lim as approaches infinity of sin(pie.x/2-3x) i need the work and answer find the limit
*October 2, 2011 by Ben*

**calculus**

Find the distance d(P1,P2)between the points P1 and P2. P1=(-5,2) P2=(2,1) d(P1,P2)=? *all the 1's and 2's are to be lower down.* Please show work
*January 1, 2013 by Lisa*

**Calculus**

Solve the differential and initial value problem: x(dy/dx) + 1 = y^2 y(1)=0 I tried using bernoulli and it didn't quite work.
*December 10, 2013 by Raj*

**maths**

Please guide me to solve the below problem: 'A'an do 2/3 of a work in 40 days.'B'can do 1/2 of the work in 75 days.'C'can do 3/4of work in 75 days.If all them together work in how many days will they do 5/6 0f the work. I had solved the above problem like this: A can do the ...
*September 4, 2011 by Ramesh Reddy*

**arithmetic**

A and B can complete a piece of work in 8 and 10 days respectively However they work alternately one day each with beginning the work In how much time will the work be completed?
*February 3, 2012 by Ramesh*

**Calculus**

If the work required to stretch a spring 1 ft beyond its natural length is 6 ft-lb, how much work is needed to stretch it 6 in. beyond its natural length?
*December 4, 2011 by Ryan *

**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**

Find the derivative of the function. y=cos((1-e^x)/(1+e^x)) Please show all work and explain. I am very confused
*October 5, 2011 by Anonymous*

**Calculus AB**

Evaluate the indefinite integral of (ln(x))/(x + xln(x)) dx by using variable substitution. Show all steps of your work.
*February 29, 2012 by Simone*

**Calculus**

Find the total work done by a 15 N force in the direction of the vector [1,2,2], when it moves a particle from O[0,0,0] to P[1,-3,4] and then from P to A[7,2,5]. Distance is measured in metres.
*May 7, 2012 by J*

**Calculus**

Find the total work done by a 15 N force in the direction of the vector [1,2,2], when it moves a particle from O[0,0,0] to P[1,-3,4] and then from P to A[7,2,5]. Distance is measured in metres.
*May 8, 2012 by J*

**calculus--please help!!**

Graph the function using transformations show your work and state. A. the domain b. the range c. the asymptotes f(x)=4-1/(x+6)^2
*December 18, 2012 by Sammy-please help!!!!*

**calculus**

Solve the equation in the real number system X^4+11x^3+24x^2-23x+35=0 Please show work
*December 27, 2012 by Austin*

**Calculus**

Determine the equation ofthetangent line in slopeintercept form at x=1 of y^3 +2x^2=1 at x=1. Please show work so I can follow the process. Thanks!
*April 1, 2013 by Rene*

**Calculus II**

A cable that weighs 1.5 lb/ft is used to lift 700 lb of coal up a mineshaft that is 400 ft deep. Find the work done.
*November 3, 2013 by Brian*

**Calculus**

What is the use of Calculus? How is it use in jobs? What jobs use Calculus? Calculus is used in engineering, economics, any physical science, and in business (e.g., actuary studies and statistics).
*May 5, 2007 by Anonymous*

**Calculus**

If M is 30% of Q, Q is 20% of P, and N is 25% of P, then M/N equals which of the following? (a) 3/250 (b) 3/25 (c) 1 (d) 6/5 (e) 4/3 When I work this problem I keep getting 6/25, but that is not one of the choices. Any help would be greatly appreciated.
*November 28, 2007 by Arnold*

**calculus**

Given x+xy+2y^2=6 find the coordinates of all other points on this curve with slope equal to -1/3. Please show work.
*December 10, 2009 by Mark*

**Calculus**

Given x+xy+2y^2=6 find the coordinates of all other points on this curve with slope equal to -1/3. Please show work.
*December 10, 2009 by Lindsay*

**Pre-Calculus**

It may look lame but I can't work out how to solve (-9) sqrt(4-x^2) = 4x + 5sqrt2. I need some guidance, please.
*November 20, 2011 by Helga*

**pre calculus**

Solve the exponential equation Express you solutions in exact form only Please show your work e^2x - 9e^x - 20 = 2
*December 20, 2011 by anon*

**pre calculus**

solve the following equation in the complex number system Please show all your work. 5x^5 + 32x^4 - 5x - 32 = 0
*December 21, 2011 by Michelle*

**Calculus**

Integrate [1/square root of(e^(2x)-1)]. I have to use u substitution. We are doing the integrals of inverse trig functions, but I cannot get it to work out!
*February 5, 2012 by Elaine*

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