Friday

August 28, 2015
Number of results: 64,811

**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*

**math**

Hi, How do I improve my math skills? I can't calculate in my head (I.e 2x43), I would actually have to write it down to solve it. I took pre-calc, calc and didnt have problem understanding. I don't know what is wrong. what should I do?
*February 27, 2015 by john*

**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*

**Pre-Calc**

This is the last question on my pre-calc homework, I looked through the textbook and have no idea how to do this. Use the Law of Sines to solve for all possible triangles that satisfy the given conditions. (If an answer does not exist, enter DNE. Round your answers to one ...
*March 5, 2015 by Cat Jones*

**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*

**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**

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*

**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*

**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*

**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*

**calc**

derivative of y=4^(6-x^2)
*February 18, 2015 by jessica*

**calc**

integral from 1 to x of (5/(t^3 +3))dt
*April 19, 2015 by sam*

**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*