Friday

January 30, 2015

January 30, 2015

Number of results: 61,762

**Studying for Calc**

I have a quiz on derivatives coming up and I really want to do well, but i'm not sure how to go about studying calc. i have no trouble studying for other subjects, but i'm doing poorly in calc and i need to make some changes in my study habits. any suggestions? i usually work ...
*October 7, 2008 by Elizabeth*

**MATHS**

A CONE WAS CONSTRACTED FROM PLASTIC, HAVE A HEIGHT OF 20cm (PART C). THE LID IS MADE UP OF HEMISPHERE HAVE RADIUS 0F 5cm (PART A) AND PYRAMID HAVE VOLUME OF 81,667cm³. THE LID FITS EXACTLY OVER THE CONE. A) CALC. THE VOL. OF PART A. B) CALC. THE VOL. OF PART C. C) CALC. THE ...
*August 9, 2010 by MTHOMBENI BAFANA*

**Pre-Calc/Calc**

Which set of parametric equations corresponds to this rectangular equation? y=2x-(x^2 / 10) A. x=4t, y=4t-(t^2 /10) B. x=2t, y=8t-(4t^2/10) C. x=2t, y=4t-(4t^2/10) D. x=.5t, y=2t-(t^2/10) E. x=t, y=t-(t^2/10)
*April 17, 2013 by Chris Math Hw Help*

**Calc**

Can someone help me with this calc problem? lim as x->0 (tan^3 (2x))/(x^3)
*January 8, 2009 by Nick*

**help chem!:/**

a) Calc. PH of 0.010 M HF and 0.030 M KF e) calc. PH Zn(OH)2 in wAter
*March 15, 2012 by ALISON*

**Pre Calc**

Does this: sqrt 3x-4=(x-4)^2-3 Multiply out to: x^4-16x^3+90^2-211x+173 I then need to put it in the graphing calc and see what the roots are.
*September 10, 2009 by muffy*

**calculus (limits)**

lim h>0 sqrt(1+h)-1/h not sure how to factor this; not allowed to use L'Hopital's Rule. (that isn't taught at my school until Calc II & I'm in Calc I).
*January 22, 2011 by John*

**physics**

an aeroplane is travelling horizontally at a speed of 80ms and drops a crate of emergency supplies.To avoid damage,the max vertical speed of the crate on landing is 20ms. a)calc d max height of the aeroplane when the crate is dropped b)calc d time taken for the crate to reach ...
*January 19, 2012 by Shanti*

**Calc or Pre calc**

I am having trouble doing this problem. I know how to do indefinate integrals, but I don't know how to do definate integrals. Can you show me how to do this. Evaluate 5 (x^3-2x)dx 2
*May 14, 2008 by jennifer*

**Math**

If (a,-3) is a point on the graph of y=x^2+4x, what is the value of a? so far i have -3=x^2+4x i can do the problem on my graphing calc but we can't use a graphing calc on the test so i need to know how to do it by hand. what do i do next?
*January 20, 2010 by Karen*

**Pre-Calc**

I'm stuck on a pre-calc problem. I need to find y as a function of x, where the constant c is a positive number for In(y-1)+In(y+1)= -x+c express your question as ln[(y-1)(y+1)] = -x+c change that to exponential form e^(-x+c) = (y-1)(y+1) e^(-x+c) = y^2 - 1 y^2 = e^(-x+c) + 1 ...
*May 9, 2007 by Sarah*

**physics**

calc the buoyant force on a 2 L helium balloon
*December 6, 2012 by chris*

**Pre-Calc**

Can you show me how to find the rectangular equation of r=2costheta + 3 sin theta All I need is an example to work off I was absent today from Pre-Calc and I have homework to do and no explanation with them-Please help with this one Thank you
*October 3, 2011 by Leah*

**Physics & Calc**

Derive the stationary target equations: v1 = [(m1-m2)/(m1+m2)]v1 v2 = [(2m1)/(m1 + m2)] v1
*November 11, 2010 by Megan*

**Calc and Physics**

Damon and Reiny. Thanks for your quick and thorough responses.
*December 16, 2012 by Daryl*

**C code**

Write a .c file named calc that: - Takes arguments from the command line - Solves a simple math problem - Returns the result as an exit status calc.c: //this is the function that gets called when the executable is run. int main(int argc, char * argv[]){ //I've given you the ...
*February 6, 2013 by Nick*

**physics-non calc**

a hammer was released from rest vi=0m/s taking 1.12 seconds to fall 1 meter. How do you solve that
*October 14, 2010 by charles*

**chemistry**

liquid heptane C7H16 is completely combusted to produce CO2 and H2O: C7H16 + 11O2 --> 7CO2 + 8H2O the heat combustion for one mole of C7H16 is -4.85*10^-3 CO2 heat of comb. = -393.5 H2O h of c= -285.8 a) calc. the vale of heat of cumbustion for C7H16 in kJ/mol a .0108 mol ...
*March 10, 2010 by hilde*

**physics calc based**

In the product F = qB (vectors), take q = 2 (neglecting the units of charge, q) and v = 2.0 i + 4.0 j + 6.0 k and F = 4.0 i + (-20 j) + 12 k . What then is B in unit-vector notation if Bx=By ?
*January 24, 2010 by hannah *

**AP Calc B/C**

The base of a solid is the region enclosed by y=x^3 and the x-axis on the interval [0,4]. Cross sections perpendicular to the x-axis are semicircles with diameter in the plain of the base. Write an integral that represents the volume of the solid. I drew a picture, but I ...
*December 15, 2014 by Anon*

**Physics with Calc**

A point charge of 1.8uC (microcoulumbs) is at the center of a Gaussian cube 55 cm on edge. What is the net electric flux through the surface?
*February 5, 2011 by Robert*

**Calc**

Profit=p(-p^2+33p+9)-9(-p^2+33p+9)+100 How do I simplify this so I can take the derivative For Further Reading * Calc - Michael, Sunday, November 25, 2007 at 4:17pm Profit=p(-p^2+33p+9)-9(-p^2+33p+9)+100 p(-p^2 + 33p + 9) Just distribute the p in. -9(-p^2 + 33p + 9) Find the ...
*November 25, 2007 by Ben*

**Calc pt2**

Original question: Posted by Lost One on Tuesday, March 5, 2013 at 12:04pm. Let f(x) = (2/3)x^3 - 2x + 1 with a restricted domain of [1,infinity]. What is the value of (f-1)'(x) when x = 13? •Calc - Steve, Tuesday, March 5, 2013 at 12:58pm since x = f^-1(y) and dx/dy = 1/y' f...
*March 5, 2013 by Lost One*

**calc**

Use L’Hopital’s rule to find the limit of this sequence (n^100)/(e^n) ...If you do L'Hop. Rule it would take forever, right? You would always get an (e^n) at the bottom and will have to use the L'Hop. rule 100 times to find the limit...100*n^99, 9900n^98, and etc. Is there a ...
*February 1, 2012 by lola*

**Physics**

A body covers a distance of 25m in the 5th sec of its motion and 40m in the 8th sec.of its motion. Calc.initial velocity and acceleration.
*July 4, 2012 by Mohan *

**Physics/Calc**

A ball is thrown vertically upward from a cliff with a speed of 20 ft/sec. The ball hits the ground at 140 ft/sec. How high is the cliff? v'+-32
*December 12, 2014 by Sally*

**Physics/Calc**

A ball is thrown vertically upward from a cliff with a speed of 20 ft/sec. The ball hits the ground at 140 ft/sec. How high is the cliff? v'+-32
*December 12, 2014 by Sally*

**AP Calc**

When a chain hangs under its own weight, its shape is catenary. The equation of a catenary with a vertex on the y-axis is y=e^x+e^-x. Find the length of the chain from x=-2 to x=2. Then use the same technique from Problem #8(Previous AP calc problem I posted) to find the ...
*July 31, 2014 by Anon*

**Physics**

A sphere of radius 10 cm is charged to a potential of 500V. Calculate the outward pull per unit area. Ans: 1390 * 10^-8 N/m^2 -------- I'm sure the calc is simple, but how do I calculate "outward pull" from voltage?
*December 24, 2009 by Sean*

**Calc**

A student is in a 20 week calc class. The function f(t)=50-50e^0.2t f(t) measures the students problem speed in t weeks -how many problems per hour can a student solve at the beginning of the course - how many problems per hour can a student solve halfway through the course -...
*July 20, 2012 by Marshall*

**Physics-Please check answer**

Damon helped me with this calc but I think the answer should be -20, not -22, could someone please check the calculation If a ball is thrown into the wall at 14 m/s and comes off at 6 m/s, what is change of velocity of the ball? I think it would be 14-6 = (-8 m/s) Is that ...
*January 5, 2011 by Russ*

**calc**

f(x)=7x-4 a) f(0) b) f(-3) c) f(b) d) f(x-1)
*October 4, 2009 by kim*

**calc 2**

(dy/dx) + 8y =5
*March 24, 2010 by Anonymous*

**calc 2**

(dy/dx) + 8y =5
*March 24, 2010 by Anonymous*

**calc 2**

(dy/dx) + 8y =5
*March 24, 2010 by Anonymous*

**calc 2**

(dy/dx) + 8y =5
*March 24, 2010 by Anonymous*

**calc**

(e^x + e^-x)/2=1
*October 17, 2010 by BOB*

**calc**

(e^7x)/(e^3)^x= e^16
*October 18, 2010 by pauly*

**calc**

(e^x)e^x+1)/(e^x-1)=8
*October 18, 2010 by Vinny*

**Calc**

If dy/dx = x²y², then d²y/dx² = ?
*January 2, 2011 by Erica*

**calc**

If dy/dx = xy - y^2 and y(1) = 3, then y (2) = ?
*February 22, 2011 by Erica*

**Calc**

If dy/dt = 2y/(t(t+2)) for t>0 and y = 1 when t = 1, then when t = 2, y = ?
*February 22, 2011 by Erica*

**calc**

If f(x)= (3x)^(3x), then f'(x) = ? Thank you!
*April 25, 2011 by Erica*

**calc**

x^2=10-4x
*May 4, 2011 by anon*

**calc**

R(t)=85 t-2 t**2; t=4
*December 7, 2011 by lc*

**Ap calc**

F(x)= (2x-5)^3
*February 3, 2013 by Trent*

**ap calc**

what is 2+2
*November 30, 2014 by Bro*

**chemistry**

This problem is from my chemistry book and I am having a little trouble with the intermediary steps: Barium metal crystallizes in a body- centered cubic lattice (atoms at lattice points only) The unit cell edge length is 502 pm, and the density of the metal if 3.5g/cm^3. (...
*May 18, 2010 by Tokey*

**Chemistry**

A .682 g sample of an unknown weak monoprotic acid, HA, was dissolved in sufficient water to make 50mL of solution and was titrated with a .135 M NaOH solution. After the addition of 10.6mL of base, a pH of 5.65 was recorded. The equivalence point was reached after the ...
*May 9, 2007 by Sara*

**calc question**

Fx = d(x) * q(x) + r(x) if r cant be o and d(x) = 2 what is r?
*February 9, 2007 by tofu*

**calc**

how to do the integral of (ln(x))/(x^2)
*January 23, 2008 by sarah*

**calc**

what is the derivative of 1/x??
*October 30, 2008 by Dan*

**Calc**

What is the integral of x^(7/2) * ln(x) dx? Thanks
*November 17, 2008 by Mike*

**calc**

ln(a² − b²)
*January 24, 2009 by cindy999*

**Pre Calc**

How do I do this?... Sq Rt[(9*Sq Rt(3x^2))]
*March 14, 2009 by MW*

**Calc**

How do I solve for x in: y = -(x-4)^2 + 4
*April 2, 2009 by Jose*

**Calc**

what is a derivitive? And how do you get it (f(x)=2x) from f(x)=x^2-3?
*September 10, 2009 by Katie*

**Calc**

lim x->3 ((x^-2)-(3^-2))/(x-3)
*September 20, 2009 by sh*

**pre calc**

13-5e^2x=3
*October 30, 2009 by Laurie*

**Pre Calc**

h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 8 1 5 2 7 6 5
*November 13, 2009 by Pre Calc*

**Calc**

how do I integrate x^4-3y^3+2y^2? thanks
*November 21, 2009 by Rose*

**pre calc**

(1/x^2-49)/(1/x+7)?
*February 23, 2010 by Karissa*

**Calc II**

x^3/(sqrt x^2+25) dx
*June 26, 2010 by Scott*

**calc**

y(s)= 1/(6(s^2)) - 5/s Find Y'(s)
*October 3, 2010 by Mel*

**Calc**

Find f'(7) for f(x)=6x^ln(x)
*November 4, 2010 by Adam*

**Calc**

Find y' for y = x/(x+y)
*December 3, 2010 by Brandon*

**Calc**

derivative of (x^2+14)/x
*February 8, 2011 by Matt*

**Calc**

What is the antiderivative of dy/dx = x/(x^2 + 1)?
*February 15, 2011 by Erica*

**pre-calc**

(3^-2+4^-2)^-1/2
*February 16, 2011 by megan*

**pre-calc**

(3^-2+4^-2)^-1/2
*February 16, 2011 by megan*

**CALC**

INTEGRAL OF Y^2/(25+Y^2)
*February 26, 2011 by tom*

**calc**

hi what is the derivativ of [-18(x^2)]/[(1+2(X^3))^2] ?? thanks!~
*March 10, 2011 by Tinka*

**Pre-Calc**

2-2
*April 10, 2011 by Chelsey*

**calc **

Let f(3) = 0, f '(3) = 6, g(3) = 1, and g '(3) = 1/3. If h(x) = f(x)*g(x), find h '(3).
*April 30, 2011 by Todd*

**Calc**

dy/dx of xy^2=tan(2x+4y)
*April 30, 2011 by ardi*

**Calc 3**

intersect x^2+y^2=36-8x^2-8y^2
*July 13, 2011 by Katie *

**Calc AB**

(1/(x+h))-(1/x) ..simplify
*August 18, 2011 by star*

**Calc AB**

(x+y)^3 expand
*August 18, 2011 by star*

**calc**

lim x-> 2- = 2x-x^2/x-2
*September 18, 2011 by calculus*

**Calc**

find d^2y/dx^2 of dy/dx = -[y/x]^1/3
*December 5, 2011 by Anonymous*

**Calc**

find d^2y/dx^2 of dy/dx = -[y/x]^1/3
*December 5, 2011 by Anonymous*

**calc**

what is (x^2-8x+3) factored?
*January 9, 2012 by haleigh*

**pre calc**

g(1/2)=-(1/2)^2+7(1/2)-7
*January 25, 2012 by Dorene*

**Calc**

Integrate from [0, 1/2]: 1/(4x^2+1)^(3/2) dx
*February 23, 2012 by Anonymous*

**Calc AB**

How do you simplify: (x^(3/2))(x+x^(5/2)-x^2)
*August 6, 2012 by Em*

**Calc**

What is lim (x -> 0) of (e^x) / x Thank you!!
*September 13, 2012 by NIK*

**Calc**

deriv. h(t)=(tˆ4-1)ˆ3(tˆ3+1)ˆ4
*October 15, 2012 by C.S.*

**calc**

Integrate 2(x^2)e^g(x) where g(x)=4^(x^3)
*May 1, 2013 by Sunny*

**AP Calc.**

Simplify: [(x^-3)-x]/[(x^-2)-1]
*July 12, 2013 by Anon*

**calc**

f"(x)=10, f'(x)=3 f(0)=1/3 find f(1)
*November 22, 2014 by Beth*

**Ap calc**

If y= e^x - e^-x / e^x + e^-x , then y'= Please help
*January 8, 2015 by Lynds*

**College Physics II (Calc-Based)**

In state-of-the-art vacuum systems, pressures as low as 1.00 x 10^-9 Pa are being attained. Calculate the number of molecules in a 1.90-m^3 vessel at this pressure and a temperature of 35.0°C. Okay. So I know I have to use the Ideal Gas Law, PV = nRT, I then transformed it ...
*August 29, 2013 by Andrew*

**medical physics**

Rx = 3000 cGy in 10 fractions, whole brain Rt and Lt laterals, KD Siemens 6x. The collimator is set for 22 X 16 cm2 portal films at 92.5 cm SSD. Calculate the treatment port MU to isocenter. Calibration performed std. SAD; treatment performed SSD (assume SSDs at the calc point...
*February 20, 2013 by sara*

**Pre-calc/Calc**

Which expression is equivalent to sin(3x) + sin x? A. 2cos(2x)sin x B. 2sin(2x)sin x C. -2sin(2x)cos x D. 2sin(2x)cos x E. -2cos(2x)sin x
*April 17, 2013 by Chris Math Hw Help*

**pre-calc**

(8y2+3y-7)(3y+4)
*October 17, 2007 by steven*

**CALC**

What are local extrema?
*December 9, 2007 by Britt*

**calc**

find dy/dx when x = csc y
*December 11, 2007 by joo*

**math calc.**

Differentiate g(x)=x^(2^1/2)+(x^3/2^1/2)+e^(2^1/2)+(2e^x)^1/2
*July 9, 2008 by nam*

**pre-calc**

how do i solve this w(4-w^2)=8-w^3
*August 27, 2008 by jared*

**Pre Calc**

the domain of g(x)=x^3-2x-1
*October 6, 2008 by Crystal*

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