17,258 results




dT/dt= k(T - Tm), t > 0 where k is a constant of proportionality, T and Tm are measured in degrees Fahrenheit, and time t is measured in hours. Because Diff wants to investigate the past using positive values of time, he decides to correspond t  0 with 6:00 A.M., and so...

Diff eq

y'(x)=sqrt2y(x)+7, y(4)=1 Solve the seperable diff eq


Put slice of "potato" in four diff bowls. Add diff "solutions" to each bowl. Which is Dependent Variable and which is Independent Variable?


Please help me on this calculus question. I am getting the wrong diff. equation and so my answers to the remaining parts are wrong. ---------------------- A thermometer reading 85 degress outside is brought into a room with a constant temperature of 72 degrees. The rate of ...

Calculus Help

use logarithmic diff. to find the derivative of the function. Show steps please! so I can see how it is done. Thank you so much! y=(e^(-x)cos^(2)(x))/(x^(2)+x+1)

physical science

if two lighting volts heat exactly they same place at they same time in are frame of ref.,it is possible that observed in other frames will see the volts heating at diff. time r at diff. places????? explain.


I want to know how we know if a function is continuas or discontinuos and what are the types and diff if discontinuos functions?


Implicit diff. y^2 + 4xy +4y^2=40 2yy'+ _______ + 8y*y=0 I am confused with the 4xy. Would you write this out to be 4x*y'+4y OR 4x*4y' + 4y*4x'? Please help

Calculus Help Please!!!

If x^3 - y^3 =3 , use only implicit diff. to find d^2y/dx^2 . Express your answer in terms of x and y only and write is as a proper fraction that is completely simplified as much as possible.


"Leave the answer as a definite integral, but indicate how it could by evaluated by using the fundamental theorem of calculus." I solved the problem to a definite integral. Proceeding via the fundamental theorem, would involve finding the indefinite integral (or antiderivative...

Calculus Help Please!!! Urgent!!!

If x^3 - y^3 =3 , use only implicit diff. to find d^2y/dx^2 . Express your answer in terms of x and y only and write is as a proper fraction that is completely simplified as much as possible. d^2y/dx^2= -6x/y^5 (this is the answer I should get but i don't know how to show ...


actually an ODE question(but there's no diff. eq. subforum) (y^2)(dy/dx)+y^3/x =2/x^2 using substitution u(x)=y^3 so I've been doing a few of these and getting them all wrong and this problem... I don't know where to start. I tried (1/u)(du/dx)+u/x(du/dx)=2/x^2 but that gives ...

Calculus Help STEVE

find y'' by implicit differentiation. 2x^3 + 3y^3 = 8 I got the first derivative as you but the problem was asking for second derivative by implicit diff. this is where i got confused. Thank you!!!

Calculus Help Please!!!

Use implicit diff. to find dy/dx of each of the following. In the following x,y and (a) are all variables. Show step by step please! Thank you! 1) y^2 = x^2+a^2 2) y^2+ay = x^2+ax+a^2


A particle is moving along the parabola 4y = (x + 2)^2 in such a way that its x-coordinate is increasing at a constant rate of 2 units per second. How fast is the particle's distance to the point (-2, 0) changing at the moment that the particle is at the point (2, 4)?


Two Boats the Picadilly and the Orange are competing for a spot in the Cup races. They race over a part of the course SEVERAL TIMES. The sample times in minutes for the Picadilly are 12.9, 12.5, 11.0, 13.3, 11.2, 11.4, 11.6, 12.3, 14.2, and 11.3. The sample times for the ...

diff calculus

1.) triangular corner lot has perpendicular sides of lengths 120 feet and 160 feet. Find the dimensions of the largest rectangular building that can be constructed on the lot with sides parallel to the streets.

Diff Calculus

a swimming pool is 5m wide, 10m long, 1m deep at the shallow end, and 3 m deep at its deepest point. a cross section is shown in the figure. if the pool is being filled at a rate of 0.1 m3/min, how fast is the water level rising when the depth at the deepest point is 1m?

diff eq

solve 2y^2(y'')+2y(y')^2=1

Diff EQ

is the integration of (x-2)^2 = 1/3(x-2)^3 Yes, that is correct.


diff in fact oppinion


Find out the partial derivative w.r.t 'x' and 'y' of f (x,y) = log(y) x Now, log(y) x = ln x / ln y Partial Diff w.r.t 'x' = 1/ x ln y so can you find out what will be the partial derivatives w.r.t 'y'


What are the steps in finding the diff quotient for f(x)= sq rt of x?


What is the diff. Between parabola and ellipse

Biology - URGENT Enzyme Lab

Did a catalase producing hydrogen peroxide lab, used manganese dioxide, fresh frozen liver, potato, ice, fine clean sand, etc. Basically just added hydrogen peroxide to the catalysts under diff conditions and stuff. Just don't get this question which is : how do you account ...


trying to find the sims and differences for the following --------------------------------------- fertilization v pollination sim's both part of the process of sexual repro diff. pollination doesnt involve direct contact since it is transfer from the anther to the stamens by ...

US history

what/who did the antifederalists support? (what is diff. from them and the federalist beliefs)


diff between actual and formal parameter


state diff. between HTML AND DHTML


whats the diff b/w figure of speech and figurative language?

social studies

how is the iroquois confederacy diff. from the colonial government?


what is the the diff betwwen the three: imperative, active and passive

differential equations

the general solution of the diff. eq. y' = (1/x)(y/(1-y)) - (1-x)(y/(1-y)) in implicit form is?


What diff will appear in the mass no.if the no. of neutron is halved no. of electron is doubled in 8 O 16


The Erie Run Outlet mall has two NIKE stores, one is on Liberty street and the other on Barnes St. Two stores laid of differently, both owners claim their stores maximizes the amounts customers will impulse purchase. A sample of 10 customers at the Liberty st store revealed ...

Diff EQ

Find all critical points of the given system and investigate the stability of each. dx/dt = y - 1 dy/dt = x^2 - y


Can someone check my answer please i don't know if I am doing this right x^ (2):x= sum (x^2 )+ (x)=x^2+x diff (x^2 )-(x)= (x^2-x) Product (¡¼x)¡½^2 (x)=x^2^x


the general solution of the diff. eq. is y' = (1/x)(y/(1-y)) - (1-x)(y/(1-y)) what is the implicit form? what method would I use for this?


I am working on a research project. I am concerned about my opening paragraph. Could anyone read this to see if it makes sense. My topic is C. Diff. In 2009 according to the CDC and US Deparmtne of Social Secirty there were 2,437,163 people that died that year. During 2009, ...

Diff Calculus

Find the interval(s) where the function is increasing of decreasing. find the: a) critical value(s) b) critical point(s) c) max. value + max. point d) min.value and min. point e)point on inflection if there is: 1) y=x^4-3x^3+22x^2-24x+12 thanks:)

home economics

What are the diff.tools, equipments,materials used for farm crop production.


Im so tired of being frustrated can someone help get the sum diff and product of this problem 3^x ∶ x^2-3^x+ 2

math grd 11

how do u draw an asymtote ? diff btwn set and interval notation? and example plz


can someone help me with this crazy problem please I have to do the sum diff and product for class x^3- ¡¼2x¡½^2 + 3x-1 ¡Ã x^2- x+4


Please can you help out: 1)The Potential diff across the terminals of a battery is 8.5v when there is a current of 3amps in the cct from the -ve to the +ve terminal. When the current is 2amps in the reverse direction, the potential diff becomes 11volts. a) what is the internal...

Pre Calculus 12

Im on the chapter of permutations/combinations/fundamental counting principle need help with 2 questions 1. emma is arranging her books in piles on her desk. she has 5 math books, 3 english books, and 4 science books. how many ways can she arrange them if she wants to keep the...


how do u draw an asymtote ? diff btwn set and interval notation? and example plz


A swimming pool is 12 meters long, 6 meters wide, 1 meter deep at the shallow end, and 3 meters deep at the deep end. Water is being pumped into the pool at ¼ cubic meter per minute, and there is 1 meter of water at the deep end. a. What percent of the pool is filled? b. At ...


How do we identify or interpret when to get the screen away or towards the mirror in different situations? Please tell me diff. cases---phy practicals

Calculus - please check my work

differentiate each function a) y = cos^3x b) y = sin(x^3) c) y = sin^2 xcos3x my answers: a) y' = 3cos^2 x(-sinx) b) y' = cos(x^3)(3x^2) c) for this one, i don't know which one is correct. i got 2 different answers but i think they may be the same.. im not sure, i did it twice...

math grd 11-midterm tomm

please explain how do u draw an asymtote ? and whats the diff btwn set and interval notation? and example plz thanks

Polynomials check my answer please

I need help bad i been doing this homework since i got home at 4:00 and am stuck on this problem. X -1 : X-2 =sum (x+1)+(x-2)=(x+x+1-2) diff (x+1)-(x-2)=(x-x-1-2) Product (x-1)(x-2)=(x^2-1)


can someone please help me with this problem I have to get the sum diff and product I keep trying to work it out but i really think im blowing it. x^3- ¡¼2x¡½^2 + 3x-1 ¡Ã x^2- x+4


i am three digit number below 100 sum of my digit is 14 and the diff is 4 who am i


sources said that differentiation of GIF is 0 but x in GIF is variable .and diff.of simple x is 1.?

Diff Eq

If y(t)=3e^(t^2)is known to be the solution of the initial value problem y'+p(t)y=0, y(0)=y_0, what must the function p(t) and the constant y_0 be?


you have 8 different flavors of ice cram and 10 diff toppings how many different desserts could you make


Do they need to match twenty days and 90 days. In the same paragraph but referring to diff requirements?


i did and iv already got that info so i need diff info


Can someone show me step by step how to get the sum diff and product of this problem x^3- 〖2x〗^2 + 3x-1 ∶ x^2- x+4

Polynomials check my answer

My brother said I did this wrong can someone check this for me please X Y-1 = sum(x)+ (y-1)=(X+y-1) diff(x)-(y-1)=(x+y+1) Product (x) (x-1) = (xy-1) = (xy-1)


find the 5 diff. ways a collection of 100 coins-pennies, dimes, and quarters- can be worth exactly worth $4.99.

math percentage diff

a value of 2.40 increased to 4.48 in 5 years. what is the change in percentage each year? this one was difficult to figure out..


Microeconomics: Describe the diff. market forms ( I've done that) Under which equlibria and under which circumstances is sustainable profir possible? ( I am lost)


how do u draw an asymtote ? diff btwn set and interval notation? and example plz


If a ball is thrown off a 123 m cliff at a speed of 18 m/s, how far from the base of the diff is the ball? Givens: Unknown: Equation: Substitute: Solve:


what is autism? autism is a developmental disablity that affects a person's way of communicating with others, their social interaction, and educational performance. how i put this in diff words?


compute theoretical yield (g) ~2Al+3Cl2->2AlCl3 ~2g Al, 2g Cl2 [ans:2.5g AlCl3] i need the calculation work bcus i got diff from the ans which is 7.12 g.

polynomials help me please

Im sorry here is the problem rewritten X^3 -2x^3 + 3x-1 : X^2-x+4 I have to get the sum diff and product and it kicking my tail i think i keep doing it wrong can someone please help me

Math - derivative of f(x) (check)

f(x)= (x^2-1)^3,is its derivative f'(x)= 6x^5 -12x^3 + 6x. Is there an alternative answer, because a computer generated answer is diff then mine. please help.

Old Bridge

Sue has 8 pairs of dress shoes. How many diff. way can she arrange five pairs of her shoes in her closet?

Diff eqn- IVP

A simple pendulum of length is oscillating through a small angle θ in a medium for which the resistance is proportional to the velocity. Obtain the differential equation of its motion and discuss the motion.


There are four children of diff erent ages in a family. Their mom purchases six di erent gifts and decides to divide the gifts randomly between the children. Assuming that a child can receive no gift or multiple gifts, answer the following questions: (a) What is the ...

ALG II - Probability

Owners of a restaurant advertise that they offer 1,114,095 diff lunches based on the fact that they have 16 “free fixins” to go along with any of their 17 menu items (sandwiches, hot dogs, and salads). How did they arrive at that number?


Then, do isotopes have different atomic radii? since they all have different numbers of neutrons. Even if they only differ by 10^-23 m, there is still some diff right?

phys. science

when most matter is heated it expands right? & doesnt water expand when it is heated? & what is the diff. b/w thermal conductor and thermal insulator? & in which direction will heat spontaneously flow?


Sum of radii of two spherical ball is 22 cm and the diff of their volumes is 3050 2/3. Find radii. In this question if i r+R= 22 (eq 1)and Pi(r2-R2)=3050 2/3 (eq 2) and subs value of r from eq 1 in eq 2; my answer wont match with textbook. What should i do???


I have a few diff questions: 1. Georgia _____________) esta enojada or teine tos)porque tiene varicela y no puede ir a la fiesta de Anita I put in the blank tiene tos

Diff eqn- IVP

The differential equation that governs the forced oscillation is shown below: 0.2 d²y/dt² + 1.2 dy/dt +2y = r(t) where r(t) is the external force. Given that r(t) = 5 cos 4t with y(0) = 0 . find the equation of motion of the forced oscillations

Diff eqn- IVP

A particle moves on the x-axis with an acceleration, a=(6t-4)ms⁻1. Find the position and velocity of the particle at t=3 , if the particle is at origin and has a velocity of when t=0


a mixture of 50g of S & 1x10^2g of Cl2 reacts completely to form S2Cl2 &SCl2. Find the mass of S2Cl2 formed. (ans:20.2g) i need the calculation work bcus i got diff. from the ans which is 70.2g.

differential equations

Solve the following equation explicitly by expanding up to order x5, the following 2nd order diff equation. y''(x) = (1 + x^2)*y(x) pls show working y =f(x)

help spanish

I am having a very diff time with htis answer these questions negatively - indicating that wjta is being asked already happened. 1. Vas a buscar una tiends de computadoras en el centro comercial? 2. Vamos a encontrar muchas rebajas en el centro?


a sample of an unknow metal exists as a perfect cube that meausres 0/78 in on a side and weighs 61.4 grams. what would be the mass, in grams, of a diff sample of this metal that has a volume of 25.0 cm^3

chem org

dipole-dipole means? and diff between non polar and polar? is it really part of organic chem?


A simple pendulum with bob of mass m and conducting wire of length L swings(is hanging ) under gravity thro' an angle 2theetha. The earth's magnetic feild component in the direction perpendicular to swing is B. the max potential diff induced across pendulum is?


A plane sound wave propagated in air has individual particles which execute a periodic motion such that their displacement y from their rest position at any time t is y=5x10^(-6)sin(800pie(t)+theta). Calculate (i) wavelength. (ii) phase diff in degree between particles 17cm ...


if two lighting volts heat exactly same place at the same time in are frame of ref,it is possible that observes in other frames will see the volts heating at def. time or diff. places? explain

chemistry - empirical formula

write the empirical formula for each of the following molecular formulae" a)P4O10 b)C2H6 Confused as to what the diff.is b/w empirical and formula...have no idea how to answer these b/c they look like empirical formulas to me


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 ...


Help please... some diff equation prbolems... 1.) Transform 2xdy - y(x+1)dx + 6y^3dx = 0 into a Bernoulli Equation. 2.) The equation of the tangent line of the one-family of curve x^2 + y^2 = 25 at P(4, 3) is_______ 3.) The complete solution of 2x^3 dy = y (y^2 + 3x^2) ...


Which ones apply to a solution ? i thought it was 2,6,7 and 8 1. Does not settle on standing 2. scatters light 3. can separate when allowed to stand 4. contains only fixed amts of components 5. Often appears cloudy 6. components do not lose their own properties 7. looks the ...


Which ones apply to a compound? i thought it was 4 and 6 1. Does not settle on standing 2. scatters light 3. can separate when allowed to stand 4. contains only fixed amts of components 5. Often appears cloudy 6. components do not lose their own properties 7. looks the same ...


elow kindy ans. my question pls.. what is optium point in budget line and indefference curve, and also what is the diff. between budget line and indefference curve?..


An oil drop ‘B’ has charge 1.6 × 10−19 C and mass 1.6 × 10−14 kg. If the drop is in equilibrium position, let 10 k be the potential diff. between the plates. [The distance between the plates is 100 mm] Then what is the value of k.


Indicate which of the following are exact numbers. the mass of a stapler? i think its inexact because all staplers are different sizes. Is that correct? Also,the mass of a postage stamp. is that inexact? because they can also be diff. sizes?

Maths A level

A large cylinrical tankor radius 40cm contins a liquid and at time,t the depth is h cm. There is a hole in the bottom and liuid leaks out at a rate of 32pi h to power of 0.5. Show at time t, the heighth of the liquid in the tank satisfies the diff. eqn..dh by dt=-0.02 h to ...

Finite Math

Fifty percent of students enrolled in calculus class have previously taken pre-calculus. Thirty percent of these students received an A for the calculus class, whereas twenty percent of the other students received an A for calculus. Find the probability that a student selected...


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).


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