Wednesday
March 4, 2015

Posts by robin


Total # Posts: 343

Calculus
Find the absolute maximum and the absolute minimum values of f(x)=x−7cos(x) on the interval [−ð,ð).
July 7, 2013

Calculus
Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 16 feet high? Recall that ...
July 5, 2013

Please help with Calc problem??
Sorry, I meant a television camera is positioned 2500 ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into account ...
July 3, 2013

Please help with Calc problem??
The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into account the increasing distance from the camera to the rising rocket. Let's assume the rocket rises ...
July 3, 2013

Calculus
A television camera is positioned 2500 ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into account the increasing ...
July 1, 2013

Calculus
Two cars start moving from the same point. One travels south at 60 mph and the other travels west at 25 mph. At what rate is the distance between the cars increasing 2 hours later? Let x = the distance covered by the south traveling car. Let y = the distance covered by the ...
June 28, 2013

Calculus
A television camera is positioned 2500 ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into account the increasing ...
June 28, 2013

Calculus
Let y=e^(x/9). a) Find the differential dy. dy = b) Evaluate dy if x=0 and dx=−0.03. dy =
June 26, 2013

Math
How would you do this problem. What is the growth rate of the stock with a $3.00 expected dividend and a $20.60 price with 15%required return?
June 21, 2013

math
R. H. Bruskin Associates Market Research found that 30% of Americans do not think that having a college education is important to succeed in the business world. If a random sample of five Americans is s selected, find these probabilities. (a) Exactly two people will agree with...
June 20, 2013

Calculus
The motion of a spring that is subject to dampening (such as a car's shock absorber)is often modeled by the product of an exponential function and a sine or cosine function. Suppose the equation of motion for a point on such a spring is s(t)=3∗e^(−2t)sin(3ð...
June 18, 2013

Calculus
Find the outside and inside functions of the following to find their derivatives: 1) sqrt(2x+9) 2) cos(cos(x)) 3) tan(x) I already know how to find their derivatives I'm just not exactly sure what parts of the chain rule equation would be considered the outside and inside.
June 18, 2013

Calculus
For what values of x with 0¡Üx¡Ü2¦Ð does the graph of f(x)=x+4sin(x) have a horizontal tangent?
June 18, 2013

Calculus
Find the equation of the tangent line to the curve y=2tan(x) at the point (pi/4,2).
June 18, 2013

Calculus
Sketch a graph of the parabola y=x^2+3. On the same graph, plot the point (0,−6). Note there are two tangent lines of y=x2+3 that pass through the point (0,−6). The tangent line of the parabola y=x^2+3 at the point (a,a^2+3) passes through the point (0,−6) ...
June 17, 2013

Calculus
Find the values of a ,b, and c in the quadratic function p(x)=ax^2+bx+c such that p(2)=6, p'2)=2, and p''(2)=3. a = b = c =
June 17, 2013

Calculus
Find the values of a , b , and c in the quadratic function p(x)=ax2+bx+c such that p(2)=6, p'(2)=2, p"(2)=3
June 14, 2013

Calculus
Find the values of a , b , and c in the quadratic function p(x)=ax^2+bx+c such that p(2)=6, pŒ(2)=2, and pŒŒ(2)=3.
June 14, 2013

Calculus
Find an equation for the tangent line of the function f(x)=6+10xe^x at the point (0,6).
June 13, 2013

Calculus
Find an equation for the tangent line of the function y=x+(4/x) at the point (2, 4). The equation of the tangent line is . You may enter the equation in any form.
June 12, 2013

Calculus
Let f(x)=−4−3x+2x^2. Use the limit definition of the derivative to find find fŒ(a)
June 8, 2013

Calculus
If a ball is thrown straight up into the air with an initial velocity of 95 ft/s, its height in feet after t seconds is given by f(t)=95t−16t^2 Find the average velocity for the time period beginning when t=1 and lasting (i) 0.5 seconds (ii) 0.1 seconds (iii) 0.01 ...
May 31, 2013

Physics
A roller coaster has a mass of 425 kg. It sits at the top of a hill with height 66 m. If it drops from this hill, how fast is it going when it reaches the bottom? (Assume there is no air resistance or friction.)
May 14, 2013

chemistry
The reaction of chlorine gas with solid phosphorus (P4) produces solid phosphorus pentachloride. When 63.5 g chlorine reacts with 28.5 g P4, which reactant is limiting?
May 13, 2013

statistics
if no preliminary sample is taken to estimate p, how large a sample is necessary to be 87% sure that the point estimate will be within a distance of 0.04 from p?
April 24, 2013

PHYSICS
A 2kg block is on a level table and held against a spring with k =150N/m which has been compressed 15 cm. he block is released from rest and pushed across the table. When the block leaves the spring it beins to experience fricion with coeficient of 0.25. What is the total ...
April 17, 2013

PHYSICS
yes would you be able to show me?
April 14, 2013

maths literacy,business studies, tourism, economic
What kind of work can i get one day with this subjects and what is the salary?
March 13, 2013

math
the original question was x^2-4x=32 can you help me solve?
March 12, 2013

math
x^2-4x+32=0. would the final answer be 2 +or- 2 sqrt7 ?
March 12, 2013

math
Thank you!
March 12, 2013

math
I am working on quadratic equations and I have worked a problem down to 3 plus or minus the square root of 361 all over 2... what next?
March 12, 2013

Physics true false
true false The speed of a particle is always positive. True False The average speed of a particle is equal to the magnitude of its average velocity. True False The acceleration of a particle can be non-zero when its speed is constant. True False When the average velocity of a ...
February 26, 2013

Geography
Hydrosphere basic facts and what makes up the hydrosphere?
February 23, 2013

Chemistry
two solutions are prepared using the same solute solution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g of the solute disolves in 24.8g of cyclohexane which solution has the greatest freesing point change? show calculations and explain.
February 18, 2013

Chemistry
two solutions are prepared using the same solute solution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g of the solute disolves in 24.8g of cyclohexane which solution has the greatest freesing point change? show calculations and explain.
February 18, 2013

Math
Rearrange this expression into quadratic form, ax2 bx c = 0 0.20= ((x^2)/(55-x)) where a = 1, and identify the values of b and c.
February 18, 2013

grammar, contractions and negatives
No one, or Someone who bought a car for transportation was not considered sane.
February 7, 2013

math
3 pumps, working 6 hours a day, can empy a water tank in 2 days. How many hours a day must 9 pumps work to empty the same tank in 1 day?
January 26, 2013

Math
A room is 45 m x 15 m. What is the least number of rectangle tiles required to pave the floor of the room, if each tile is 50 cm x 1m?
January 26, 2013

Geology
There is also a graph i can't move it. Building Isochrons and Determining the Ages of Three Rocks Page 15 of 17 For each of the three rocks listed below follow these steps to determine the rock's age of formation. 1. Prepare an isochron by plotting the points that ...
January 12, 2013

phicicks
A 0.300- kg brass block is attached to a spring of negligible mass. What is the value of the spring constant if the vibrational frequency is 0.855Hz?
December 9, 2012

Chemistry
You are asked to prepare a temperature bath that freezes at -25 degrees C, using only water and ammonium sulfate. a. How many grams of ammonium sulfate would you need to prepare this bath if you start with 500 grams of water? b. What would the boiling point (degrees C) of this...
November 14, 2012

subject verb agreement
which verb is correct. 1.Historical fiction (is, are) make-belive stories based on real events or people. 2. An example of historical fiction (is, are) the novel Ben and Me. 3. The main characters (is, are) Bem Franklin and a mouse named Amos.
November 14, 2012

Math
Andrea sells tickets at the Showtime Cinema. On Thursday night, Back to the Future was playing. Adults, senior citizens and children bought tickets at the following rates: Adults $5.00 Senior Citizens $1.00 Children $.10 Andrea sold 100 tickets worth $100. How many adult, ...
November 7, 2012

grammar action and linking verbs(mental or physica
In China, shrines honor ancestors. Is honor an a. action verb(physical)b. action verb(mental) c. linking verb d. not a verb
October 30, 2012

English singluar and plural possessive nouns
1. Slaves lives were terribly hard. 2. They wre at the mercy of owners whims. 3. A runawy life was in danger. 4. Often runaways traveled by the moon light. 5. It could take several weeks travel to reach the Norht. 6. Slaves hid directions in a song words. 7.Abolitionists role ...
October 25, 2012

Enlgish, possessive form of singular and plural no
possessive form of family, brother, suitcase, child, government, pen, train, tree, woman, refugg, families, brothers, suitcases, children, governments, pens, trains, trees, women,refugees
October 25, 2012

english, possessive nouns
Directions: Wrie each sentence. Change the underlined phrase to show possession. The honesty of children is refreshing. The honesty of children is the underline part of the phrase.
October 23, 2012

English
What is the difference between a complex, compound, and compound-complex sentence?
October 3, 2012

physics
Three forces act on a moving object. One force has a magnitude of 61.9 N and is directed due north. Another has a magnitude of 52.0 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with ...
September 23, 2012

algebra
Tony went to the racetrack with $80. He won $15 on the 1st race, lost $12 on the 2nd, lost $6 on the 3rd and won $8 on the 4th. How much money did he have after the 4th race.
August 28, 2012

American Governement
Cite five reasons that Americans should trust the government?
August 21, 2012

Intro to Social Work
Your role is as a social worker for a group of low-income tenants of an apartment building who have no heat in their building. The landlord is attempting to raise the rent but the tenants cannot afford the increase. You have brought the parties together for a meeting. What are...
August 18, 2012

psychology
Identify intervention strategies to deal with burnout
August 15, 2012

Algebra
$3,000 balance, 21% rate, $1,500 payment, adjusted balance method
August 5, 2012

Biology
If the line for 60 captured is extended downward to zero percent error, what fraction of the total population would this represent? (Compare the actual number in the can to the extrapolated number on your graph.) What more information do I need to provide to get an answer?
July 15, 2012

Biology
A trip to a different stream which had 30 fish marked at an earlier time produced 20 captured fish but none were recaptured with fish tags. Can you estimate the number of fish in this stream? Explain your answer.
July 15, 2012

Science
Should humans strive to preserve a representative sample of all biomes or aquatic zones? Why should humans be concerned with the extinction rate?
April 26, 2012

Trig
Why does 11.4(7pi/18)=133pi/30 ?
April 1, 2012

English
Ms. Sue, thank you, I guess this additional information would have been helpful. Questions 1-4 the choices are, misplaced modifier, dangling modifier, faulty predication or incomplete comparison. Questions 5-10 re: the sentence shifts in, the choices are: person, tense, ...
March 11, 2012

Important Operations
18r4s5+6/-32s+3=? A)6r2s5+3 B)-6r2s5+3 C)6r2s4+3 D)-6r2s4+3
March 9, 2012

Algebra
Which must be a whole number? A. The time it takes to drive 300 miles at 55 mph B. The area of a circle with a radius of 5 feet C. The area of a triangle with base of 15 and height of 9 D. The number of books in 12 bookstores
January 2, 2012

Algebra
69% of the students at a school are involved in after-school activities. There are 598 students in the school. Which is the best estimate of the number of students in after school activities? A. 360 B. 380 C. 420 D. 450
January 2, 2012

science
When water is split into hydrogen and oxygen what happens- is it a change in matter
November 30, 2011

math
During a sale at the local department store, you buy three sweatshirts and two pairs of sweatpants for $85.50. Later you buy three more sweatshirts and four more pairs of sweatpants for $123.00 What is the sale price of each sweatshirt and each pair of sweatpants?
November 13, 2011

English
@SrajMCgin it's sometime hard to find idioms if english is your 3rd language's thats wy some people ask after searching the expressions for them because they can't find them !
October 22, 2011

chemistry
The vapor pressure of water @ 80 degrees C is 0.467 atm. Find value of Kc for the reaction H2O(l) to H2O(g) @ this temp.
October 9, 2011

Calculus
If f(x)=(3x)/(1+x2) find f′(4)______. Use this to find the equation of the tangent line to the curve y=(3x)/(1+x2) at the point (4,0.70588). The equation of this tangent line can be written in the form y=mx+b where m is: ________ and where b is:______
September 29, 2011

Physics
A hockey puck is sliding on frictionless ice. It slams against a wall and bounces back toward the player with the same speed that it had before hitting the wall. Does the velocity of the hockey puck change in this process?
September 15, 2011

Physics
Using Newton's law and the law of universal graviation: F=ma Acceleration is centripital acceleration, so a=(v^2)/r so G(m^2/r^2)=m(v^2/r)
July 12, 2011

math
chad's commission rate is 12%. He invests his commission from the sale of $9000 worth of merchandise at an interest rate of 8%, compounded quarterly. How much is Chad's investment worth after 6 months?
July 11, 2011

math
If a car is traveling at 55 mph in one direction, how long would it take to decelerate, turn around, and catch up with another car going at a steady speed of 100 mph in the opposite direction?
July 6, 2011

Physics
Hi, I am in the middle of a physics lab about sound resonance, but I have no idea what "n" stands for in the equation we have to use, which is L=(2n-1)(wavelength)/4 any help? thanks!
June 27, 2011

science
5.0millimeters
June 16, 2011

HEALTH
PLEASE HELP ME
June 5, 2011

HEALTH
What are the Chronic or long term effects of Cocaine users not crack cocaine users?
June 5, 2011

Health
Ms. Sue I know chronic and long term mean the same thing but Sara on the other page gave me short term effects and now i need the long term effects of Cocaine AND Sneha wht r u tlking about? I need the chronic effects OR as some people say "the long-term effects" of ...
June 5, 2011

Health
Ok yes I know but now I need the Chronic effects: When someone uses Cocaine over a long time what damaging effects can occur? The other one u answered was the short term effects and NOW i need the chronic effects
June 5, 2011

Health
HELP IMMEDIATELY
June 5, 2011

Health
I need them in like bullet ponts
June 5, 2011

Health
Ok, in Health class my TOPIC is Cocaine----- and i need someone to answer the following Chronic Effects: When someone uses this subatance over a long time what damaging effects can occur? P.S. my topic is COCAINE NOT crack cocaine...
June 5, 2011

math
if 7000 is placed in an account with 6 percent intrest compounded annually how many years does it take to triple? rounded to two decimals.
May 5, 2011

managment
“Egalitarian companies are more innovative.What do you think?
May 3, 2011

english
The word CAN is used to refer to A. the ability to do something B. permission to do something C. the need to do something
April 20, 2011

English
Thanks for the website I will work on it
April 14, 2011

English
I said A so what is the correct answer
April 14, 2011

English
Then it would be A right
April 14, 2011

English
saturday
April 14, 2011

English
Which of the following sentences is in the passive voice? A. I just don't see the point. B. I want my MTV. C. A whole case of beer gets drunk every Satyrday night. D. Please don't tell me I missed it. I think its D
April 14, 2011

English
Which of the fllowing is CORRECT? A. She sings bad. B. He runs a well race. C. They won with a lucky shot. D. all of the above
April 14, 2011

Math
Find the radius of the given circumference C= 3.14, r=?
March 24, 2011

american government
write a letter to the a presidential canidate in 2008 based on results of Pennsylvania polls
March 15, 2011

Geoscience
can you help me write out a geological time scale of an area located within stone mountain Georgia? I need a description of the area, how the rock transformed and was dated, picture of a map that has the longitude and latitude of the area picked, the history of the area, ...
February 21, 2011

Chemistry
A metal, , of atomic weight 96 reacts with fluorine to form a salt that can be represented as . In order to determine and therefore the formula of the salt, a boiling point elevation experiment is performed. A 9.18- sample of the salt is dissolved in 100.0 of water and the ...
February 20, 2011

Chemistry
A metal, , of atomic weight 96 reacts with fluorine to form a salt that can be represented as . In order to determine and therefore the formula of the salt, a boiling point elevation experiment is performed. A 9.18- sample of the salt is dissolved in 100.0 of water and the ...
February 20, 2011

Earth Science
I need help finding the geological time scale of stone mountain georgia, with a longitudinal, and latitude map of the area.
February 19, 2011

earth
Hello. I need help writing this outline on the rock I picked, which is granite. I chose it because granite is the most common rock form available in Georgia. I just need information on each area so I can write the paper.
February 7, 2011

earth
Geological time scale summary for stone mountain's granite in georgia, with: description of the Feature Description of Processes Influence of Time on Rock Formation Discussion of Transformation processes Hand Samples Location Types of Rock from map A Map History Age of ...
February 7, 2011

com 155
• Write several sentences describing a recent interaction with a friend or family member about personal finance or credit cards. This interaction may be imagined or real. • Use at least five different pronouns in your sentences. • Identify all pronouns used by ...
January 30, 2011

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