Thursday

April 24, 2014

April 24, 2014

Number of results: 39,130

**calculus**

My problem is that a stft above the sidewalk. a man 6ft tall walks away from the light at the rate of 3ft/sec. at what rate is his tip of shadow moving
*Tuesday, July 26, 2011 at 12:34am by Abdul Muqsit*

**calculus**

You are letting the air out of a hot air balloon at a steady rate. The volume of the balloon is decreasing at the rate of 10pi m^3/min when the diameter is 45 meters. At what rate is the radius of the balloon changing? I need help! How do I solve this problem? Thank you so ...
*Sunday, November 18, 2007 at 12:53am by Anonymous*

**Calculus**

Related Rates Problem An isosceles triangle with a base of 20root3 cm long. If the length of the leg decreases at rate 3 cm/h, find the rate of decreasing of the area of the triangle in the instant at which the triange becomes equilateral.
*Saturday, May 4, 2013 at 6:58pm by Mostafa*

**related rates calculus problem**

A balloon is being filled with air at a rate of 3 cubic meters per minute. Find the rate at which the radius is changing when the volume is 113.0973355 cubic meters.
*Thursday, December 30, 2010 at 4:58pm by elizabeth*

**Calculus**

What is the simplest solution to the Brachistochrone problem and the Tautochrone problem involving calculus? (I know that the cycloid is the solution but I need a simple calculus proof as to why this is the case)
*Thursday, May 27, 2010 at 12:13am by Sam*

**related rates problem-calculus**

A spherical balloon is being filled with air in such a way that its radius is increasing at a rate of 2 centimeters per second. At what rate is the volume of the balloon changing at the instant when its surface has an area of 4 pi square centimeters?
*Thursday, December 30, 2010 at 3:25pm by james*

**calculus-rate problem**

A conical tank (with vertex down) is 10 feet acros the top and 12 feet deep. If water is flowing into the tank at a rate of 10 cubic feet per minute, find the rate of change of the depth of the water when the water is 8 feet deep.
*Thursday, August 30, 2007 at 1:13pm by beth*

**Word Problem-Calculus**

A spherical balloon is being inflated in such a way that its radius increases at a rate of 3 cm/min. If the volume of the balloon is 0 at time 0, at what rate is the volume increasing after 5 minutes? my answer is 45 cm/min. is this right. thanks
*Thursday, March 14, 2013 at 2:13pm by Mark*

**calculus**

There is a right triangle with x and y legs labeled B and A, respectively. B is increasing at a rate of 1 m/s and A is decreasing at a rate of 2 m/s. At what rate is the angle theta (located on the leg B) changing when A is 10m and B is 20m?
*Wednesday, December 15, 2010 at 10:07pm by Nimra*

**Calculus**

At the moment OHaganBooks is selling 1000 books per week and its sales are rising at a rate of 200 books per week. Also, it is now selling all its books for $20 each, but the price is dropping at a rate of $1 per week. I need to know at what rate OHaganBooks' revenue is rising...
*Saturday, November 24, 2007 at 10:52am by Julie*

**Calculus**

At the moment OHaganBooks is selling 1000 books per week and its sales are rising at a rate of 200 books per week. Also, it is now selling all its books for $20 each, but the price is dropping at a rate of $1 per week. I need to know at what rate OHaganBooks' revenue is rising...
*Sunday, November 25, 2007 at 5:26pm by Destinee*

**Calculus**

Sand is being dumped from a conveyor belt at a rate of 20 cubic ft/min into a pile the shape of an inverted come whose diameter and height are always the same. (a) Find the rate of increase of the height when the pile is 10ft high. This is a 2 part problem. Please show me how ...
*Monday, November 28, 2011 at 12:34pm by Nathaniel*

**Calculus**

How would you solve this problem: An airplane is flying in still air with an airspeed of 240 mph. If it is climbing at an angle of 22 degrees, find the rate at which it is gaining altitude.
*Wednesday, November 17, 2010 at 10:01pm by Anonymous*

**Calculus**

At the moment OHaganBooks is selling 1000 books per week and its sales are rising at a rate of 200 books per week. Also, it is now selling all its books for $20 each, but the price is dropping at a rate of $1 per week. I need to know at what rate OHaganBooks' revenue is rising...
*Sunday, November 25, 2007 at 7:20pm by PLEASE HELP! PR*

**organic chemistry**

Hi, I was wondering if somebody could help me out with this problem which says: "Why does changing the base have no effect on the rate of an E1 reaction while it does affect the rate of an E2 reaction?" I would appreciate any help I can get on this problem! Sincerely, Manny
*Saturday, November 10, 2007 at 1:26pm by manny*

**CALCULUS**

A 25 ft ladder is leaning against a vertical wall. At what rate (with respect to time) is the angle theta between the ground and the ladder changing, if the top of the ladder is sliding down the wall at the rate of r inches per second, at the moment that the top of the ladder ...
*Thursday, March 29, 2012 at 7:26pm by Anonymous*

**calculus**

the management of a company has decided that the level of its investment should not exceed C dollars. Furthermore, managament has decided that the rate of net investment (the rate of change of the total capital invested) should be proportional to the difference between C and ...
*Tuesday, April 10, 2012 at 11:38am by mari *

**Calculus**

Hi there I am having some troubles trying to do my calculus homework and I really need help trying to do this problem from my homework: Set up the problem and do not solve: The mass of the solid bounded by the surfaces 2x^2 + 2y^2= 9, z=0, z=3 with density function p(x,y)= x^...
*Thursday, December 3, 2009 at 10:01am by shylo*

**Calculus**

Calculus If V volts are measured across a resistance of R ohms in a circuit carrying a current of I amperes, V=IR. At a certain instant, the voltage is 250 and is increasing at a rate of 4 volts/min, while the current is 0.5 AMP and is increasing at a rate of 0.01 amp/min. ...
*Thursday, February 28, 2013 at 10:59am by Trevor*

**Calculus**

A certain calculus student hit Mrs. Evans in the head with a snowball. If the snowball is melting at the rate of 10 cubic feet per minute, at what rate is the radius of the snowball changing when the snowball is 1 foot in radius?
*Sunday, November 6, 2011 at 6:51pm by Rina*

**related rates with work shown**

this is a relate rates problem in calculus in a right triangle, the hypotenuse is 5 and the vertical side is x and the angle is theta. so if theta increases at a constant rate of 3 radians per minute, at what rate is x increasing in units per minute when x equals 3 units? d(...
*Sunday, April 15, 2007 at 2:36pm by Anonymous*

**MATH**

Rate Problem: Mr. Stewart rode a distance of 12miles out into the country on a bicycle and returned on foot. His rate on the bicycle was 4 times his rate on foot. He spent 5 hours on the entire trip. Find the rate of walking and on the bicycle.
*Tuesday, October 23, 2007 at 7:03pm by Michi*

**mathematics**

need help badly. this is the math problem. is the rate three-forth's cup of butter/ 3 eggs equivalent to the rate of 3 cups of butter/12 eggs? Please show the work so I can study this equation for my next problem. thanks kindly
*Sunday, August 29, 2010 at 11:23am by cindy*

**calculus**

I have the following problem on a takehome assignment and am stuck. A particular stock has value V(t) at time t where V(t)=Ke^(1/2) where K>0. Assume that alternative investments grow in value to e^(rt). Calculate the instantaneous rate of change in the value of the stock. ...
*Sunday, March 16, 2008 at 8:30pm by Rey*

**calculus**

Can someone tell me how to do this type of problem? A particle moves along the curve y=sqrt(1+x^3). As it reaches the point (2,3) the y coorindate is increasing at a rate os 4cm/s. How fast is the x coordinate of the point changing at that instant?
*Monday, February 21, 2011 at 12:58pm by Susie*

**Calculus**

(It's a related rate question) A man 6ft tall walks away from a lamp post (15ft) at 5ft/sec. How fast is his shadow lengthening? --- I have the picture, and the constants, the man and the lamp post. I have 5ft/sec as dw/dt, and I know I'm looking for ds/dt, the rate of the ...
*Sunday, September 12, 2010 at 1:59pm by Nikki*

**Calculus**

A spherical balloon a has a diameter 2 m when it is 1500m high . It is observed that the diameter increases at a constant rate of 4cm/min as it continues to rise. At what rate is the volume increasing when the diameter is 4m . At what rate is the surface area imcreasing then?
*Sunday, March 13, 2011 at 11:22pm by Mehak*

**calculus**

I need help setting up this problem: A particle moves along the curve y=sqr(1+x^3). As it reaches the point (2,3) the y-cordinate is increasing at a rate of 4cm/s. How fast is the x-coordinate of the point changing at that instant. I could only come up with this: dy/dx=4
*Friday, May 8, 2009 at 9:16am by XCS*

**calculus**

Find the rate of change of the area of a circle with respect to the radius r. What is the rate when r = 12
*Wednesday, November 23, 2011 at 1:51am by billy *

**Please Help!!!!!!**

Decide whether the following problem can be solved using precalculus, or whether calculus is required. If the problem can be solved using precalculus, solve it. If the problem seems to require calculus, explain your reasoning and use a graphical or numerical approach to ...
*Monday, January 9, 2012 at 5:00pm by Anonymous*

**4 CALCULUS study problem**

1. How fast does the radius of a spherical soap bubble change when you blow air into it at the rate of 15 cubic centimeters per second? Our known rate is dV/dt, the change in volume with respect to time, which is 15 cubic centimeters per second. The rate we want to find is dr/...
*Thursday, January 9, 2014 at 1:23pm by Samantha*

**calculus**

The length l of a rectangle is decrasing at a rate of 5 cm/sec while the width w is increasing at a rate of 2 cm/sec. When l = 15 cm and w = 7 cm, find the following rates of change: The rate of change of the area: Answer = cm^2/sec. The rate of change of the perimeter: Answer...
*Thursday, September 27, 2012 at 6:59pm by Avi*

**Calculus**

A woman 5 ft tall walks at the rate of 5.5 ft/sec away from a streetlight that is 16 ft above the ground. At what rate is the tip of her shadow moving?
*Tuesday, October 23, 2012 at 4:47pm by Anonymous*

**Calculus**

for f(x)=-x^2 +1, which value is the largest magnitude? a) average rate of change from x=-1 to x=1 b) instanteneuous rate of change at x=3 c) instanteneous rate of change at x=0 average rate of change from x=-4 to x=0
*Wednesday, July 4, 2012 at 9:31pm by g*

**chemistry**

At the instant oxygen is reacting at the rate 5.0 x 10-4 mol/L*s, at what rate is NO reacting and NO2 forming? this is a method of initial rate problem. i don't know what to do the chemical equation is 2 NO(g) + O2 (g) ---> 2 NO2 (g)
*Saturday, September 8, 2007 at 6:26pm by Chris*

**Calculus, bobpursley! **

This has to do with my last Calculus problem. I need help on it..The part I replied to after you answered the question.
*Tuesday, September 21, 2010 at 8:01pm by Leanna*

**calculus**

A woman 5.5 ft tall walks at a rate of 6 ft/sec toward a streetlight that is 22 ft above the ground. At what rate is the length of her shadow changing when she is 15 ft from the base of the light?
*Sunday, March 2, 2008 at 9:49pm by Anonymous*

**calculus**

I need help with this calculus problem. H(S)=S/(1+S) If F 1/2, -1/2 & (a+1)? I can't figure out what this mean /?
*Monday, May 30, 2011 at 12:46pm by Tammy*

**Algebra**

I hope that I am typing this particular problem right because this algebra problem was provided on a chart. However, I can't copy and paste the chart on here. The problem says "The given graph represents the number of active servicemen in the region who are overweight." Find ...
*Saturday, February 8, 2014 at 3:41pm by Student5*

**Calculus**

Given two problems: Problem A: Tau = Integral(0 to v) v/(q^2 - v^2) dv q = constant Problem B: Tau = Integral(V TO 0) v/(q^2 - v^2) dv q = constant Why is it that, SUBSTITUTION RULE is used in problem A, and QUOTIENT RULE is used in problem B? The two problems are somewhat ...
*Wednesday, December 19, 2007 at 11:08pm by Anthony*

**chemistry**

A first-order reaction is 40% complete at the end of 50 minutes. What is the value of the rate constant (in min^-1)? A. 1.8 x 10^-2 B. 1.0 x 10^-2 C. 1.2 x 10^-2 D. 8.0 x 10^-3 E. none of these how would i approach this problem? i know that to find the rate constant, i could ...
*Monday, May 26, 2008 at 7:42pm by jesse may*

**calculus**

Find the limit of this calculus problem.? (5x-3)/(ln(5+4e^(x)) x=inf
*Thursday, November 4, 2010 at 4:08pm by Zel*

**chemistry**

Which of the following rate laws suggests that the reaction probably occurs in a single step? why is this problem cant be answer a since it has order of 1 a)(CH3)3CBr + OH- →(CH3)3COH + Br- rate = k[(CH3)3CBr] b)NO(g) + O2(g) → NO2(g) + O(g) rate = k[NO][O2] c)H2O2...
*Monday, May 17, 2010 at 9:31pm by eng*

**chemistry**

Which of the following rate laws suggests that the reaction probably occurs in a single step? why is this problem cant be answer a since it has order of 1 a)(CH3)3CBr + OH- →(CH3)3COH + Br- rate = k[(CH3)3CBr] b)NO(g) + O2(g) → NO2(g) + O(g) rate = k[NO][O2] c)H2O2...
*Tuesday, May 18, 2010 at 12:34am by eng*

**Calculus**

Determine the maximum sustainable yield (the maximum harvesting and still keep the population stable) of population of logistic growth is Kr/4. I know the logistic equation with constant harvest rate, h, is dx/dt=rx((1-x/k)-h) I do not know how to apply that to the problem...
*Wednesday, December 14, 2011 at 10:32pm by L.S.*

**math word problem**

word problem need help: suppose you own a card shop. you buy one line of cards at a rate of 4 cards for $5. you plan to sell the cards at a rate of 3 cards for $5 how may carfds must you sell in order to make a profit of $100.00 i dont understand how to get answer can you help
*Saturday, September 8, 2012 at 3:49pm by marko *

**math**

you have deposited 1000 dollars in your savings account with n annual interest rate of 4 percent compounded monthly. how much money are you going to have in your account after six months? [(1+ 0.04/12)]^6 x 1000 = ?? is the answer 1020.164? You got it. well theres another part...
*Sunday, September 17, 2006 at 10:40pm by john*

**college calculus**

1) each side of a square is increasing at a rate of 6cm/s. At what rate is the area of the square is 16 cm^2? 2)the radius of a sphere is increasing at a rate of 4mm/s.How fast is the volume increasing when the diameter is 80mm? 3)A particle moves along the curve y= (1+x^3)^1/...
*Wednesday, March 31, 2010 at 1:02am by alissa*

**pre-calculus**

For groups of 80 or more people, a charter bus company determines the rate per person according to the formula: Rate=8-0.05(n-80),n(greater than or equal to)80 where the rate is given in dollars and 'n' is the number of people. Now, Express the revenue 'R' for the bus company ...
*Friday, October 3, 2008 at 9:28pm by aelisha*

**Calculus- rates**

A man 6ft. tall walks at the rate of 5 ft/sec toward a streelight that is 16 ft. above the ground. At what rate is the length of his shadow changing when he is 10ft. from the base of the light?
*Sunday, November 13, 2011 at 7:45pm by Sarah*

**Craig - baloon - calculus moved up**

Posted by Craig on Tuesday, November 25, 2008 at 7:54pm. t: 0 2 5 7 11 12 r'(t): 5.7 4.0 2.0 1.2 0.6 0.5 The volume of a spherical hot air balloon expands as the air inside the balloon is heated. The radius of the balloon in feet is modeled by a twice-differentiable function ...
*Wednesday, November 26, 2008 at 6:32am by Damon*

**calculus-changing voltage**

V = IR V is increasing at the rate of 1 volt/sec while I is decreasing at the rate of 1/3 amp/sec. Let t = time in sec What is dV/dt? What is dI/dt? Find the rate at which R is changing when V = 12 volts and I = 2 amp. Thanks. Please ignore this. I got the answer.
*Saturday, December 9, 2006 at 1:18pm by Jen*

**college algebra**

Solve the problem. A man rode a bicycle for 12 miles and then hiked an additional 8 miles. The total time for the trip was 5 hours. If his rate when he was riding a bicycle was 10 miles per hour faster than his rate walking, what was each rate?
*Wednesday, February 25, 2009 at 11:09am by megan*

**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.
*Tuesday, November 18, 2008 at 5:22pm by Dan*

**math**

It is projected that t months from now, the average price per unit for gods in a certain sector of the economy will be P(t) = -t3 +7t2 +200t + 300 dollars. c.Use calculus to estimate the change in the rate of price increase during the first half of the 6th month. How can I ...
*Saturday, November 12, 2011 at 9:38am by namuun*

**Calculus**

Shadow Length A man 6 feet tall walks at a rate of 3 ft per second away from a light that is 16 ft above the ground (see figure). When he is 11 ft from the base of the light find the following. (a) The rate the tip of the shadow is moving. (b) The rate the length of his shadow...
*Wednesday, August 31, 2011 at 11:18am by Andrea*

**calculus**

is average rate of change and average value the same or will you get a different answer for each this is calculus so it's the mean average. it's using the formula and integrating. I dont understand your question, but I can assure you that average rate of change and average ...
*Thursday, April 12, 2007 at 4:35pm by david*

**Chemistry**

IF the rate of consumption of N2)4 (below) is .0221, what is the rate of production of NO2? N2O4(g)<->2NO2(g) Please help and explain. BC i have to actually understand how to do the problem. Thanks
*Sunday, January 23, 2011 at 1:58pm by Amber*

**calculus**

Let F(s)=5s2+1s+4. Find a value of d greater than 0 such that the average rate of change of F(s)from 0 to d equals the instantaneous rate of change of F(s)at s=1.
*Monday, February 1, 2010 at 5:31pm by t*

**Calculus**

Let F(s)=5s2+5s+4 . Find a value of d greater than 0 such that the average rate of change of F(s) from 0 to d equals the instantaneous rate of change of F(s) at s=1. d=
*Monday, September 13, 2010 at 7:21pm by Melissa*

**calculus**

the side of squyare,s, is increasing at a rate of k unites per second. find the rate at which the area of the square is increasing
*Monday, November 29, 2010 at 5:22pm by lindy*

**Calculus**

the side of an equilateral triangle decreases at a rate of 3cm/s. at what rate is the area decreasing when the area is 150cm squared?
*Sunday, June 19, 2011 at 6:36pm by Simba*

**Calculus**

Water flowing into a hemispherical tank of 5m radius at a rate of ((3m^3)/(hr)) Determine the rate at which the depth of water increases.
*Saturday, November 3, 2012 at 11:53pm by Daniella*

**Calculus - another question**

"The side of an equilateral triangle decreases at the rate of 2 cm/s. At what rate is the area decreasing when the area is 100 cm^2?" Help!
*Tuesday, March 9, 2010 at 10:28pm by Stuck*

**Math -Calculus**

A cylinder with radius of 20 ft is being filled with water at a rate of 2000 ft^3/hour. Find the rate at which the height of the water is increasing.
*Monday, November 19, 2012 at 7:32pm by Puja*

**calculus**

if a snowball melts so that its surface area decreases at a rate f 1cm^2/min, find the rate at which the diameter decrease when the diameter is 10cm?
*Friday, October 25, 2013 at 6:56pm by Briasn-Ismael vargas*

**Calculus Rate of Change**

Find the average rate of change h(x)=2x^2-4 from x=2 to x=6 Simplify your answer as much as possible
*Tuesday, March 25, 2014 at 10:27am by Shelby*

**Calculus-rates**

1.) A man 6 ft tall walks at a rate of 5 ft per sec. from a light that is 15 ft above the ground. At what rate is the top of his shadow changing? 2.) An airplane flies at an altitude of 5 miles toward a point directly over an observer. The speed of the plane is 600 mph. Find ...
*Thursday, May 5, 2011 at 4:54am by Amy*

**Chemistry**

Calculate the rate at which N2O4 is formed in the following reaction at the moment in time when NO2 is being consumed at a rate of 0.0521 M/s. 2NO2(g) <-> N2O4 (g) I am not really sure how to go about this problem. rate = k (N2O4) d(NO2)/dt = -2 d(N2O4)/dt This is what I...
*Tuesday, May 19, 2009 at 11:14pm by Martin*

**Calculus Please help!**

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 3500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 7000 centimeters and the area is 87000...
*Friday, February 28, 2014 at 2:51pm by ALI*

**pre calculus**

Jack invests $1000 at a certain annual interest rate, and he invests another $2000 at an annual rate that is one-half percent higher. If he receives a total of $190 interest in 1 year, at what rate is the $1000 invested?
*Tuesday, March 4, 2014 at 12:46am by Danielle*

**Chemistry**

For the reaction, 2 XO + O2 = 2 X02, some data obtained from measurement of the initial rate of reaction at varying concentrations are given below. run # [XO] [O2] rate, mol L-ls-l 1 0.010 0.010 2.5 2 0.010 0.020 5.0 3 0.030 0.020 45.0 The rate law is therefore a. rate = k[XO...
*Monday, February 20, 2012 at 3:10pm by Hannah*

**Math subject Calculus**

Hi there I am having some difficulties to solve this problem from my homework package and i don't understand how to approach this problem. Please help me by giving me advice on how to approach this problem. Let z = xsin(x/y), y does not equal zero. Show that the tangent plane ...
*Saturday, October 24, 2009 at 4:48pm by shylo*

**Help meee**

Answer from spreadsheet Answer from hand calculation Problem #1: Find the total amount if you deposit $500 at a rate of 5% for two years using simple interest. Year 1 Year 2 Problem #2: Find the total amount if you deposit $300 at a rate of 6% for three years using simple ...
*Wednesday, April 17, 2013 at 3:58pm by Katie*

**Calculus**

a sandbag is dropped from a balloon at a height of 60 meteres when the angle of eleveation to the sun is 30 degrees. find the rate at which the shadow of the sandbag is traveling along the ground when the sandbag is at a height of 35 meters. hint: the position of the sandbag ...
*Monday, November 9, 2009 at 6:55pm by Anonymous*

**Chemistry**

For the reaction, 2 XO + O2 = 2 X02, some data obtained from measurement of the initial rate of reaction at varying concentrations are given below. run # [XO] [O2] rate, mol L-ls-l 1 0.010 0.010 2.5 2 0.010 0.020 5.0 3 0.030 0.020 45.0 The rate law is therefore a. rate = k[XO]...
*Monday, February 20, 2012 at 4:29pm by Hannah*

**physics**

A subway train starts from rest at a station and accelerates at a rate of 1.60 m/s2 for 14.0s. It runs at a constant speed for 70.0 s and then slows down at a rate of -3.50 m/s2 until it stops at the next station. a) Sketch a position vs. time graph for this problem. b) Sketch...
*Monday, June 4, 2012 at 5:57pm by cody*

**Calculus**

How would i start this problem? The amount that workers contribute monthly for health care insurance premiums can be modeled by A(t)=0.07t^3-3.1t^2 + 54.3t-230, where A is the monthly amount contributed and t is the number of years after 1980. Find the instantaneous rate of ...
*Monday, October 19, 2009 at 12:12am by Marilyn*

**Calculus Homework**

You are blowing air into a spherical balloon at a rate of 7 cubic inches per second. The goal of this problem is to answer the following question: What is the rate of change of the surface area of the balloon at time t= 1 second, given that the balloon has a radius of 3 ...
*Wednesday, October 16, 2013 at 10:49pm by Kelly*

**chemistry**

I have a problem like this: CHCl3 + Cl2 = CCl4 +HCL This is the rate table: CHCL3 Cl2 Initial Rate .010 .010 .0035 .020 .010 .0069 .020 .020 .0098 .040 .040 .027 They want me to find the rate constant and the rate law.
*Saturday, February 23, 2013 at 10:18am by Nancy *

**Math**

Hello I am having trouble with a pre-calculus problem. The problem is ln|Sin2X-CosX-1|=0 if you could help by listing the steps to solve that would be great! Thanks!
*Monday, December 2, 2013 at 10:11pm by Anonymous*

**Calculus Please Help**

Given the numerical values shown for the function f(x), find approximate values for the derivative of f(x) at each of the x-values given. x= 0 1 2 3 4 5 6 7 8 f(x)= 13 15 16 17 17 14 11 9 7 f'(x)= 2 1 1 1 0 -3 -3 -2 -2 What seems to be the greatest rate of change of f(x)? rate...
*Monday, February 21, 2011 at 8:45pm by Celine*

**physics**

The flow rate of a liquid through a 2.0cm radius pipe is 0.0080 m^3/s. the average fluid in the pipe is? i know that Av=volume flow rate for this problem the flow rate is 0.008m^3/s. Do i divide by the radius^2 to get velocity or is there someother equation im supposed to be ...
*Sunday, November 11, 2007 at 6:11am by BrOwN GuRL*

**Calculus**

Sales of televisions grow at a rate proportional to the amount present (t is measured in days) (a) Set up a differental equation to model this problem (b) Solve the differential equation if at t=0, there are 20 televiosions sold and after 3 days, 500 televisions are sold.
*Wednesday, May 20, 2009 at 9:08pm by Emileee*

**College Algebra Word Problem**

I have been racking my head with this one and dont know how to approach it. The question is: A bank loaned out $64,000, part of it at the rate of 13% per year and the rest at a rate of 5% per year. If the interest recieved was $6000, how much was loaned at 13%. I know the ...
*Tuesday, September 23, 2008 at 9:33pm by Marlon*

**math,algebra**

can someone just set up the equations for me for this problem. thanks... Problem #1 A plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, what was the ...
*Tuesday, April 17, 2007 at 5:42pm by jasmine20*

**math**

Problem #1: Find the total amount if you deposit $500 at a rate of 5% for two years using simple interest. Year 1 Year 2 Problem #2: Find the total amount if you deposit $300 at a rate of 6% for three years using simple interest. Year 1 Year 2 Year 3 Problem #3: Find the total...
*Friday, April 12, 2013 at 10:57am by Boobear*

**Calculus**

A man is 6ft tall and is walking at night straight toward a lighted street lamp at a rate of 5 ft/sec. If the lamp is 20 ft above the ground, find the rate at which the length of his shadow is changing.
*Thursday, February 28, 2013 at 12:01pm by Trevor*

**calculus**

The altitude of a triangle is increasing at a rate of 3.000 centimeters/minute while the area of the triangle is increasing at a rate of 2.500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 9.000 centimeters and the area is 93...
*Monday, May 14, 2012 at 12:26am by remy*

**calculus**

the edge of a cube is increasing at the rate of .05 centimeters per second. in terms of the side of the cube s, what is the rate of change of the volume of the cube, in cm^3/sec
*Thursday, February 10, 2011 at 12:25am by crystal*

**Calculus - Find volume of cylinder**

There is a cylindrical tank lying horizontally on the ground, its diameter is 8 feet, and length is 25 feet, the depth of the water currently in the tank is 2 feet. (1 gallon=231 cubic inches) How many gallons of water are in the tank? How many gallons of water will it take to...
*Tuesday, May 15, 2007 at 9:00pm by Ashely*

**Pre calculus**

How do I solve this exponent problem? I understand the exponent rules, but I getting 1 but 1 is not the answer! I don't want anyone to solve the problem for me, I want to learn how to solve this type of problem. Thank you! Solve the equation: -8=-3-6 (3sqrtx^2) Thanks again!
*Wednesday, March 27, 2013 at 5:47pm by anon*

**math**

Okay so i here is the problem......find the unit rate. I dont remember how to solve for the unit rate. Help me please i have a quiz tomorrow.
*Monday, January 9, 2012 at 7:24pm by kayla*

**calculus**

A. a particle moves around the circle x^2+y^2 = 1 in such a way that the x coord rate of change is dx/dy= y B) IS THE PARTICLE MOVING COLCIKWISER OR COUNTERCLOCKWISE AROUND THE CIRCLE C) FROM THE RT TRIANGLE ONE CAN SEE THAT SIN(THETA) = Y AND COS(THETA) = X USE THESE ...
*Friday, January 7, 2011 at 1:37am by anu*

**calculus**

A. a particle moves around the circle x^2+y^2 = 1 in such a way that the x coord rate of change is dx/dt= y B) IS THE PARTICLE MOVING CLOCKWISE OR COUNTERCLOCKWISE AROUND THE CIRCLE C) FROM THE RT TRIANGLE ONE CAN SEE THAT SIN(THETA) = Y AND COS(THETA) = X USE THESE RELATIONS...
*Tuesday, January 10, 2012 at 9:54pm by aze*

**calculus**

The voltage V (volts), current I (amperes), and resistence R (ohms) of an electric circuit are related by the equation V=IR. Suppose that V is increasing at a rate of 3 volt/sec while I is decreasing at a rate of 1/8 amp/sec. Let t denote time in seconds. Determine the rate at...
*Thursday, September 27, 2012 at 6:57pm by Avi*

**AP Calculus**

At what value of h is the rate of increase of √h twice the rate of increase of h? (a) 1/16 (b) 1/4 (c) 1 (d) 2 (e) 4
*Thursday, December 22, 2011 at 9:54pm by T*

**Calculus**

Wheat is poured on the ground at a rate of 12 ft^3/s. The pile forms a cone whose altitude is always three fourths of the radius. Find the rate at which the altitude is increasing when the altitude is 6.0 ft.
*Saturday, March 10, 2012 at 1:48pm by Candy*

**math**

how long will it take to earn $787.50 on $5000 at 5 1/4%(percent) what is the rate it is compounded? annually, semi-annually, monthly, what? dat information is not given aren't you supposed to be using the interest rate formula? if so, then u have two variables missing, the n ...
*Monday, February 19, 2007 at 7:51pm by Spencer*

**Calulus**

Hi there I need help with one of the problem from my homework package. This week for my calculus class, we were learning how to do partial derivative and finding the tangent of the plane. So I do not know how to approach this problem. Please help me by how to derive this ...
*Sunday, October 25, 2009 at 6:12pm by shylo*

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