Saturday

April 18, 2015

April 18, 2015

Number of results: 45,022

**college calculus-initial value**

dy/dx=cos(7x)+5/pi initial condition y(pi/4)=2
*December 6, 2010 by eileen*

**college calculus-initial value**

dy/dx=cos(7x)+5/pi initial condition y(pi/4)=2
*December 6, 2010 by eileen*

**calculus**

X. An automobile with seven years of use has a commercial value of $34057.7, but five years ago its value was $72250. If the value of such automobile varies exponentially with the time. (36-41) 36.- What was the value of the automobile when it was new? 37.- What will be the ...
*November 25, 2008 by steve alexander*

**calculus**

An automobile with seven years of use has a commercial value of $34057.7, but five years ago its value was $72250. If the value of such automobile varies exponentially with the time. (36-41) 36.- What was the value of the automobile when it was new? 37.- What will be the value...
*November 25, 2008 by steve alexander*

**college algebra**

The height of a projectile fired upward is given by the formula s = v0t – 16t2, where s is the height, v0 is the initial velocity and t is the time. Find the times at which a projectile with an initial velocity of 128 ft/s will be 144 ft above the ground. Round to the nearest ...
*April 8, 2014 by Kelly*

**Business Calculus**

Pam and Tim decide to start saving money for their daughter's college education. They open a college savings plan (529) with a 500 dollars initial investment and next month start to make monthly deposits of 120 dollars. If the account pays 8% compounded monthly, how much will ...
*February 11, 2013 by cs94*

**Chemistry**

The reaction X + Y --> products was studied using the method of initial rates. The initial rate of consumption of X was measured in three different experiments. What is the value of the rate constant, k? *concentrations are in mol/L and initial rates are in molL-1s-1 Exp 1...
*February 23, 2011 by Jamie*

**calculus**

How do you solve the initial value problem? (dy/dx)-2y+4=0, y(1)=4
*March 13, 2010 by Bree*

**Calculus**

Solve the initial-value problem. y'' - 2y' + y = 0 , y(2) = 0 , y'(2) = 1
*March 16, 2014 by Sandy*

**college chemistry**

If the initial concentration of F(g) is 8.285 mol/L, calculate the % decomposition of F(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kc at 927.0 °C is 370.00. The initial concentration of the reaction products is 0 mol/L. 2F(g) = ...
*October 3, 2010 by sparkle*

**college chemistry**

please help! If the initial pressure of I2(g) is 1.738 atm, calculate the % decomposition of I2(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 1000 K is 0.254. The initial pressure of the reaction products is 0 atm. I2(g) = 2I(g)
*October 5, 2010 by sparkle*

**College physics**

A projectile is launched vertically from the surface of the Moon with an initial speed of 1400 . At what altitude is the projectile's speed one-half its initial value? do you use the equation Ei = Ef and vf would be 700 E= 1/2 mv^2 -G (Mass of the moon/radius)
*November 19, 2009 by Mary*

**calculus**

solve the initial value problems: 1- dq/dz = 2 + sinz, q(0)=5 2-dy/dx = (x^2 -2)x, y(2)=4 3-dy/dx = 4e^5^x + x, y(0)=4 4- dy/dx 3x + 2, y(3)= 2
*April 19, 2010 by piper*

**Calculus**

solve second-order initial value problem y"(x)= x e^-2x y'(0)= 0 y(0)= 0
*May 15, 2008 by Mina*

**Calculus II**

Solve the Initial Value Problem: Let k and Po be positive constants. P(0)=Po dP/dt = kP^2
*March 17, 2009 by Michelle*

**calculus**

solve the initial value problem by separation of variables dy/dx=y^(2)+1, y(1)=0
*March 17, 2011 by james*

**calculus**

solve the initial value problem by separation of variables 8. dy/dx=x+1/xy, x>0, y(1)=-4
*March 18, 2011 by mike*

**calculus**

solve the initial value problem by separation of variables dy/dx=-x^2y^2, y(4)=4
*March 19, 2011 by sally*

**calculus**

solve the initial value problem by separation of variables dy/dx=-xy^2, y(1)=-0.25
*March 19, 2011 by sally*

**calculus**

solve the initial value problem by separation of variables dy/dx=-xy^2, y(1)=-0.25
*March 20, 2011 by linda*

**calculus**

solve the initial value problem by separation of variables dy/dx=-x^2y^2, y(4)=4
*March 20, 2011 by linda*

**calculus**

how do you solve the initial value problem by separation of variables dy/dx=-x^2y^2, y(4)=4
*March 20, 2011 by kimberly*

**calculus**

find the solution of the initial value problem y'=xye^x; y(1)=1
*April 10, 2012 by Anonymous*

**Calculus**

Find f (x) by solving the initial value problem. f '(x) = 6x^2 - 10x; f(2) = 5 f(x) =
*July 19, 2013 by Anonymous*

**Calculus**

Find f(x) by solving the initial value problem. f '(x) = 3ex - 4x; f(0) = 10 f(x) =
*July 19, 2013 by Anonymous*

**Please help! (Calculus)**

Solve initial value problem explicitly: 1. y'= ye^-x, y(0)=1 2. y'= 5xe^-y, y(1)=1
*February 2, 2011 by Leah*

**calculus**

solve the initial value problem by seperation of variables du/dt=2t+sec2t/2u, u(0)=-5
*March 18, 2011 by mike*

**calculus**

solve the initial value problem by seperation of variables du/dt=2t+sec2t/2u, u(0)=-5
*March 18, 2011 by joseph*

**calculus**

how do you solve the initial value problem by using separation of variables dy/dx=1/y^2, y(0)=4
*March 19, 2011 by billy*

**calculus**

how do you solve the initial value problem by using separation of variables dy/dx=-xy^2 when y(1)=-0.25
*March 20, 2011 by kimberly*

**calculus**

Please help find the solution to the initial value problem dy/dx=(1+2cos^2 x)/y with(y>0), and y=1 when x=0. Thanks.
*April 29, 2011 by John*

**Calculus-Antiderivative **

Solve the following initial value problem: dr/dt=7cos(pi(t)), r(1/4)=14 r(t)=?
*November 8, 2013 by Max*

**calculus**

how do you solve the initial value problem by using separation of variables dy/dx=1+x/(sqrt of y), y(2)=9
*March 19, 2011 by billy*

**Calculus**

For solving initial value problems is there any way to do it without a calculator? For example: f"(x)=12x^2-6x+8, f(-1)=5 f'(-1)=-21
*March 19, 2008 by Emily*

**Calculus**

Use Newton's Method with the function f(x)=x^2-2 and initial value Xo=2 to calculate x1,x2,x3. I have no idea how to do this
*October 27, 2010 by Don*

**Calculus II**

Solve the initial value problem using Taylor Series and the following conditions: y'(t) = y(t) + 2t y(0) = A
*February 2, 2014 by Xavier*

**Calculus**

I am given the function P=9e^(-0.9t) In the funcion form P=(P initial)(a^t) what are the values of P initial and a P initial is 9 what is a?
*September 21, 2008 by George*

**math**

Baseball Nick throws a baseball upward with an initial velocity of 60 feet per second. What is the maximum height of the ball after Nick releases the ball? Formula for the problem - h(t)=v0t-16t^2, h(t)= the height of an object in feet, v0=an object's initial velocity in feet ...
*April 14, 2007 by Angel*

**calculus 2**

Use euler's method with step size 0.2 to estimate y(1), where y(x) is the solution of the initial-value problem y'= -3x+y^2, y(0)=1
*March 13, 2012 by Geminese*

**calculus 2**

Use euler's method with step size 0.2 to estimate y(1), where y(x) is the solution of the initial-value problem y'= -3x+y^2, y(0)=1
*March 13, 2012 by Geminese*

**calculus**

Use Euler's method with step size 0.2 to estimate y(1), where y(x) is the solution of the initial-value problem. y' = 5x + y^2, y(0)=-1.
*March 14, 2012 by Carlton*

**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*

**Calculus**

Solve the first-order initial value problem using half angle formulas {y'(x)= 1 + sin^2 x y (0)= -7
*May 14, 2008 by Mina*

**calculus**

The rate of change of an investment account earning continuous compound interest is given by dA/dt=kA where k is a positive constant. The initial account value was $2500. At the end of the third year, the account value was $4200. Find the particular solution to the ...
*March 13, 2013 by karen*

**calculus**

The rate of change of an investment account earning continuous compound interest is given by dA/dt=kA where k is a positive constant. The initial account value was $2500. At the end of the third year, the account value was $4200. Find the particular solution to the ...
*March 13, 2013 by fishfry*

**Math**

Find the specific solution for the following differential equations: a) (dy/dx)^2 - x^4 = 0 given the initial value y(1) = 0 b) dy/dx = ysinx given the initial value y(pi) = 1
*November 9, 2008 by Alice*

**Calculus**

Consider the differential equation, dy/dx=(x+1)/y^2 with the initial condition y(0)=3. Write down the particular solution, and hence, calculate the value of y when x=8.7, to 3 dec places.
*February 11, 2012 by Yvonne*

**Chemistry**

This problem is 1st order for half life. How long would it take for the concentration of cyclopropane to decrease to 50% of its initial value? to 25% of its initial value? Rate constant is 9.2/s I set up like this... t1/2= 0.693/9.2/s= 0.075s at 50% I can't figure out how to ...
*January 21, 2013 by Chris*

**calculus**

Please help . confused here. The rate of change of an investment account earning continuous compound interest is given by dA/dt=kA where k is a positive constant. The initial account value was $2500. At the end of the third year, the account value was $4200. Find the ...
*March 11, 2013 by mikey2*

**Calculus**

Show that y= x + sinx-pi satisfies the initial value problem dy/dx=1 + cos x, y(pi)= 0 i don't understand how to do this problem. i don't know where to begin.
*November 18, 2008 by Dan*

**calculus**

Use Euler's method with given values of to obtain an approximation of the initial value problem when x=3 . Round your answers to four decimal places, if necessary. dy/dx= x+y, y(0) =3 n=4, y(3)= n=6, y(3)=
*April 21, 2012 by Anonymous*

**calculus, math**

Use Newton's method to approximate the value of (543)^(1/5) as follows: Let x1=2 be the initial approximation. find x2 and x3 =? approximation
*November 22, 2011 by kayla*

**Calculus**

Use the Fundamental Theorem of Calculus to find the area of the region bounded by the x-axis and the graph of y = 4 x3 − 4 x. Answer: (1) Use the Fundamental Theorem of Calculus to find the average value of f(x) = e0.9 x between x = 0 and x = 2. Answer: (2) Draw the ...
*December 6, 2010 by Erika*

**calculus**

Hello! Just needed help with understanding this specific question. We never really wet over Euler's method so I'm not sure how to go about it. "Use Euler's method in order to solve the initial value problem below. dy/dx = x-3 and y=4 when x=1 Use Euler's method with increment'...
*February 3, 2015 by megan*

**Math**

A share of stock loses 5% in value and then gains 5% . How does its ending value compare with its initial value?
*November 20, 2009 by Cade*

**Mathematics**

Pam and Tim decide to start saving money for their daughter's college education. They open a college savings plan with a 400 initial investment and next month start to make monthly deposits of 100. If the account pays 8.00% compounded monthly, how much will the account be ...
*November 17, 2008 by Maddie*

**Calculus**

I am confused on how to solve this problem : $5000 is invested for 4 years at 7% per annum compound interest. a. what will the amount be at the end of this period? b. what is the expression for the value of the investment after n full years? c. the investment will exceed $10,...
*February 15, 2007 by Jess*

**college calculus**

find a and b so that f(x)=x^2+ax+b has a local min at (6,-5) i found the derivative: f'=2x+a then i found a 0=2x+a 0=2(6)+a 0=12+a a=-12 but i can't seem to get the correct value for b. i plugged -5 into the original function, but my book says the answer is b=31. how do i get ...
*October 23, 2008 by kate*

**math**

Urban Community College is planning to offer courses in Finite Math, Applied Calculus, and Computer Methods. Each section of Finite Math has 40 students and earns the college $40,000 in revenue. Each section of Applied Calculus has 40 students and earns the college $60,000, ...
*October 16, 2010 by liz*

**Calculus-HELP!!!!**

Show that the function y=c_1 e^x cos(x)+ c_2 e^x sin(x) satisfies the differential equation y''-2y'+2y=0 for any values of c1 and c2, then find the values for those constants that solve the initial value problem y(0)= 1, y'(0)= -1
*July 2, 2013 by Elyse*

**College Physics**

A single resistor is wired to a battery.Define the total power dissipated by this circuit as P initial. What is the power, in terms of P initial, dissipated by this circuit? Power = P initial.
*February 6, 2010 by Lanise*

**calculus**

(A) Consider the wave equation with c=1, l=1, u(0,t)=0, and u(l,t)=0. The initial data are: f(x)=x(1-x)2, g(x)=sin2(pi x). Find the value of the solution at x=0, t=10, and at x=1/3, t=0. Find the value of the solution at x=1/2, t=2. (B) Suppose that l=2, c=1/2. Draw the domain...
*October 22, 2013 by lucy*

**physics**

x=x0+v0t+1/2at^2. Assuming that x0=0, a=2, and x=h, solve for t in terms of initial v and h? x0 mean initial value of x same with v0
*June 8, 2012 by Joseph*

**calculus**

Use Euler's method with step size .2 to estimate y(.4), where y(x) is the solution of the initial value problem y=x+y^2, y=0. Repeat part a with step size .1
*November 10, 2013 by Bryan*

**Calculus**

Solve the following initial value problem explicitly: y'= ye^-x , y(0)=1 How do you solve this problem? I'm really confused!
*February 2, 2011 by Tania*

**college**

The value of a mint state 63 uncalculated 1950 Jefferson nickel minted at Denver is 8/7 the value of a 1945 nickel in similar condition minted at Philadelphia. Together the total value of the two coins is 15.00 what is the value of each coin?
*August 29, 2010 by T*

**College Physics**

The drawing shows a version of the loop-the-loop trick for a small car. If the car is given an initial speed of 4.5 m/s, what is the largest value that the radius r can have if the car is to remain in contact with the circular track at all times?
*October 6, 2010 by Dawn*

**COLLEGE CALCULUS. HELP!**

the fundamental theorem of calculus, f(x)=∫(0,x) t^3+2t^2+2dt, and find f"(x). my answer was: f'(x)=x^3+x^2+2 f"(x)=x^4/4 + 2x^3/3 + 2x it said its wrong.
*April 15, 2012 by lindsay*

**Calculus**

I need to take a college calculus class. Can someone direct me to a site which might help me get a good start? Thanks in advance.
*July 10, 2008 by jules*

**calculus**

If f(x)=∫ (from -x to x) cos(t)/(1+e^t) dt and x=asin(77/85), then the absolute value of f′(x)−f(x) can be expressed as a/b, where a and b are coprime positive integers. What is the value of a, and what is the value of b?
*July 20, 2013 by andy*

**college algebra**

Find the maximum value of 5x + 7 – x2 on the horizontal span of 0 to 5. (Enter the maximum value of the expression, not the value of x at that point.)
*February 27, 2011 by amber*

**Calculus**

For f(x)=x^2/3(x^2-4) on [-2,2] the "c" value that satisfies the Rolle's Theorem is A. 0 B. 2 C. +or-2 D. There is no value for c because f(0) does not exist E. There is no value for c because f(x) is not differentiable on (-2,2)
*March 15, 2015 by Anonymous*

**Math/Calculus**

Solve the initial-value problem. Am I using the wrong value for beta here, 2sqrt(2) or am I making a mistake somewhere else? Thanks. y''+4y'+6y=0, y(0)=2, y'(0)=4 r^2+4r+6=0, r=(-4 +/- sqrt(16-4(1)(6))/2 r=-2 +/- sqrt(2)*i , alpha = -2, beta = 2(sqrt(2)) y=e^-2x*(c1*cos(sqrt(2...
*July 12, 2007 by COFFEE*

**College physics**

According to test performed by the manufactures, an automobile with an initial speed of 75 km/h has a stopping distance of 25 m on a level road. assuming that no skidding occurs during breaking, what is the value of μ , between the wheels and the road required to achieve ...
*February 26, 2013 by Sneakatone*

**College Algebra**

so i am suppose to to find the max value attained by… g(x) = -3x2 - 24x - 18. but my teacher said "There is a difference between determining the maximum value and naming the location of the maximum value." what does that mean??
*November 20, 2011 by Brianna *

**college Algebra**

so i am suppose to to find the max value attained by… g(x) = -3x2 - 24x - 18. but my teacher said "There is a difference between determining the maximum value and naming the location of the maximum value." what does that mean??
*November 20, 2011 by Brianna *

**COLLEGE PHYSICS**

A rocket is launched at an angle of 60.0° above the horizontal with an initial speed of 99 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 32.0 m/s2. At this time, its engines fail and the rocket proceeds to move as a projectile.
*September 10, 2010 by CARY*

**Calculus**

Give acceleration a=d^2s/dt^2,initial velocity, and initial position of a body moving on a coordinate line. Find the bodys position at time t. a=e^t v(0)=20 s(0)=5
*April 25, 2010 by Anonymous*

**Calculus**

Give acceleration a=d^2s/dt^2,initial velocity, and initial position of a body moving on a coordinate line. Find the bodys position at time t. a=e^t v(0)=20 s(0)=5
*April 25, 2010 by Anonymous*

**Economics**

Suppose that the average earnings for high school graduates is $25,000, the tuition, fees, and books for typical year of college total $10,000 and that a college degree takes 5 years. a) How large must the present value of the increment to earnings from getting a college ...
*October 1, 2007 by Ryan*

**math**

Suppose that the average earnings for high school graduates is $25,000, the tuition, fees, and books for typical year of college total $10,000 and that a college degree takes 5 years. a) How large must the present value of the increment to earnings from getting a college ...
*October 1, 2007 by Ryan*

**Calculus**

Use Euler's method with step size 0.2 to estimate y(1.4), where y(x) is the solution of the initial-value problem below. Give your answer correct to 4 decimal places. y' = x - xy y(1) = 0 h = 0.2 Since I am at y(1) = 0 and not y(0) = 0 would I just do this twice? As in: y1 = 0...
*June 22, 2007 by COFFEE*

**Really need help in Calculus Problem?!**

Use Euler's method with step size .2 to estimate y(.4), where y(x) is the solution of the initial value problem y=x+y^2, y=0. Repeat part a with step size .1
*November 10, 2013 by Bryan*

**calculus**

Does anyone know of any free calculus websites? I'm taking a college class in the fall and would like to build my confidence since I am somewhat weak in math. Thank you in advance.
*July 28, 2008 by jules*

**math 127**

In 2008 ACT,Inc reported that 74% of 1500 randomly selected college freshman rerurned to college the next year. Estimate the national freshman to sophomore retention rate. a) Verify below the two condition are met for constructing a confidence interval for the population ...
*July 27, 2010 by marylou*

**physics**

The amplitude of an oscillator decreases to 69.0% of its initial value in 15.5s. a) What is the value of the time constant?
*December 1, 2009 by kelly*

**physic**

The amplitude of an oscillator decreases to 36.2% of its initial value in 20.5 s. What is the value of the time constant?
*December 5, 2009 by elena*

**physics**

For a damped harmonic oscillation, the equation of motion is 0, 2 2 + g + kx = dt dx dt d x m with m = 0.25 kg, g = 0.07 kgs−1 and k = 85 Nm−1. Calculate (i) the period of motion, (ii) number of oscillations in which its amplitude will become half of its initial ...
*March 9, 2012 by swapnali*

******college algebra******

Let h(x) = 3x + 4. For what value of x is (h o h)(x) = h(x). If no such value exists, type DNE in the space provided.
*October 30, 2011 by Brianna *

**college algebra**

find the zeros of f,f(x) = 2x2 + x − 21 x= ? larger value x= ? smaller value
*October 19, 2014 by A*

**Calculus**

Suppose f(x)=2x^2-x^3 and g(x)= sin(pix/2). a) What is the exact value of the integration from 0 to 2[f(x)-g(x). Find numerical approximation of this value. What does the value of this integral tell you about the areas of the regions beteen the two graph
*January 21, 2010 by Scott*

******college algebra******

Let g(x) = -2x + 8 and h(x) = 3x + 4. For what value of x is composition (g o h)(x) = (h o g)(x). If no such value exists, type in DNE in the space provided.
*October 30, 2011 by Brianna *

**calculus**

the graphs of f(x0=x^3 and g(x)=3x+5 have one intersection point. Determine the x-value for this intersection point using Newton's Method with an initial estimate of x1+2. You should use this method 3 times in order to obtain estimates x2, x3, and x4
*November 17, 2011 by No Name*

**Calculus-Newton Method Approximation **

Use Newton's method to approximate the positive value of x which satisfies x=2.3cosx Let x0=1 be the initial approximation. Find the next two approximations, x_1 and x2, to four decimal places each.
*November 1, 2013 by Liz*

**college algebra**

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -5t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in ft/sec and “k” is the initial height in feet (as if you were on top of ...
*March 29, 2010 by renee*

**College Algebra**

A machine depreciates by 1/5 of its value each year. If it cost $50,000 new, what is its value after 8 years?
*December 9, 2008 by Jenny*

**college**

With examles give differences between present value and future value as used in financial mathematics.
*December 5, 2009 by Lugee*

**Math/Calculus**

Solve the differential equation y'=3t^2+4. Solve the initial value problem y(0)=3. Separation of variables! My work: dy/dt= 3t^2+4 dy= 3t^2+4 dt Then you integrate both sides. ∫ dy= ∫ 3t^2+4dt Question: is there a 1 in dy? ( ∫ 1dy)? If so: y+C1=t^3+4t+C2 y=t^...
*April 2, 2015 by Sarah*

**physics**

A glider on an air track is connected by springs to either end of the track. Both springs have the same spring constant,k , and the glider has mass M. A)Determine the frequency of the oscillation, assuming no damping, if k= 125N/m and M= 250g. (I got the answer to be 5.03 hz) ...
*May 25, 2009 by kelsi*

**Calculus**

The graphs of f(x) = x^3 and g(x) = 3X+5 have one intersection point. Determine the x-value for this intersection point using Newton's Method with an initial estimate of X1=2. You should use this method three times in order to obtain estimates X2, X3, and X4.
*November 17, 2011 by Andres*