Thursday
April 28, 2016

Posts by andre

Total # Posts: 159

Calculus
How do you find the derivative of sqrt(x+sqrt(x+sqrt(x+.......)))?
March 29, 2016

Calculus
Use the integral identity: ∫(a-1) (1/(1+x^2))dx=∫(1-1/a) (1/(1+u^2))du for a>1 to show that: arctan(a)+arctan(1/a)=π/2
March 14, 2016

math
What is the largest integer n such that 1440/(n^2-1) is an integer?
March 5, 2016

math
What is the largest integer n that 4n+1 is a multiple of n+1?
March 5, 2016

Math
How many digits are in the decimal representation of 5^40? No calculator allowed.
March 2, 2016

calculus
There is a shape first a regular triangle inscribed in a circle, and inscribed in a square, inscribed in a circle, inscribed in a pentagon, etc. so polygon circle polygon circle, etc. the radius of the first circle is 1, find an equation for radius n. number 2:give an argument...
February 22, 2016

math
Prove that sinx=x for x is a real number has only one solution at x=0
February 15, 2016

Math
physical hands they can't point to any place on the dial, because it won't be a correct time
February 6, 2016

Math
If a valid time on a 12 hour time period has the hour hand and minute hand switched, how many times will that result in another valid time? I have found 11, which is when the hour hand points at the same place as the minute hand. I know there is much more, but I can't ...
February 6, 2016

Calculus
What is the derivative of f^3(g(x)) where both are continuous functions? I used chain rule and got 3f^2(g(x))f'(g(x))g'(x) but it is not right.
February 5, 2016

Calculus
1. Prove that (f(x+h)-f(x-h))/2=f'(x) 2. Prove that any parabola sastifies the equation (f(x+h)-f(x-h))/2=f'(x) For the first question, I tried to solve it but there is an extra h tacked on to one side. I have no clue what to do for the second question.
February 1, 2016

Calculus
Use the identity sin^2x+cos^2x=1 and the fact that sin^2x and cos^2x are mirror images in [0,pi/2], evaluate the integral from (0-pi/2) of sin^2xdx. I know how to calculate the integral using another trig identity, but I'm confused about how to solve this one.
January 18, 2016

Calculus
Integrate 1/sinx dx using the identity sinx=2(sin(x/2)cos(x/2)). I rewrote the integral to 1/2 ∫ 1/(sin(x/2)cos(x/2))dx, but I don't know how to continue. Thanks for the help.
January 11, 2016

Calculus
Find the volume generated by rotating about the x axis the area bounded by x=0, y=2sinxcosx,, y=2cosx, and x=4, if 0≤x≤pi/2. I don't get the graph.
January 4, 2016

Calculus
A thin plate lies in the region between the circle x^2+y^2=4 and the circle x^2+y^2=1 above the x axis. Find the centroid. For the second part, same question except the region in the first quadrant instead of above x axis. For part a, I figured out bar x is 0, and I tried to ...
January 3, 2016

Calculus
Why do you subtract the 2 integrals?
December 31, 2015

Calculus
A 20 meter long steel cable has density 2 kg per meter. It is hanging straight down. There is a 100 kg bucket of concrete attached to the bottom. How much work is required to lift the bucket 10 meters by lifting the cable ten meters? Gravitational force equals 9.8 in this ...
December 31, 2015

Science - Chemistry
I am not sure. Can somebody please confirm mol fraction of water : 27.75mol/36.3395mol = 0.76 mol fraction of ethanol : 8.5849 mol/36.3395 = 0.24 Vapour pressure of water inside a bottle of 100 proof : 13.3mmHg (0.76)(17.5mmHg) = 13.3mmHg Ptot = (0.76)(17.5mmHg) + (0.24)(...
December 30, 2015

Salk
What is 58,420 in simplest form (math question 6grade)
December 14, 2015

trigonometry
from a point A on the side of straight road, the angle of elevation of the top of the electric pole is 15°20'. from a point B on the same side of the road, the angle of elevation of the top of the pole is 10°52'. If the distance of A and B is 50 meters, what is...
December 7, 2015

wcccd
A car dealership offers a $1400 rebate and a 5% discount off the price of a new car. Let p be the sticker price of a new car on the dealer's lot, r the price after the rebate, and d the discounted price. Then r(p) = p − 1400 and d(p) = 0.95p
November 21, 2015

wcccd
The period p of a pendulum, or the time it takes for the pendulum to make one complete swing, varies directly as the square root of the length L of the pendulum. If the period of a pendulum is 1.3 s when the length is 2 ft, find the period when the length is 7 ft. Round to the...
October 18, 2015

history
1c 2d 3a 4c
September 21, 2015

DC-AC Electronics
What is a Series Capacitor
August 4, 2015

Maths
A cylindrical tank has the dimensions a 100cm and 140cm ,if the tank is filled with 275 liters of water what is the depth of water in the tank
June 16, 2015

Science
what is the combination of waves?
May 24, 2015

Languages Arts
If im right can you please explain it please
February 6, 2015

Languages Arts
Which of the following describes the word dew? A. What happens when you don't get enough sleep for a few days. B. What happens to your teeth when you eat too much candy. C. What happens to plants in a garden overnight. D. What happens when you leave a crayon in the sun. Is...
February 6, 2015

Computers
1. What does the term "fair-use exception" mean? (1 point) to use only material that has never been published the ability to use material made by others for educational purposes an exception to copyright restrictions for images only Educational material is no longer ...
February 3, 2015

Sience
Thank you!! so much
January 9, 2015

Sience
3.What are the advantages of your design over using fossil fuels (I JUST WANNA KNOW WHAT DOES THE QUESTION MEAN LIKE BREAK IT DOWN FOR ME YOU DONT HAVE TO DO IT THANK YOU)
January 9, 2015

English
1) In the story "A Meeting in the Dark," John's character advances the plot and communicates the theme through each of the following conflicts except. A)man vs. man B)man vs. nature C)man vs. society D)man vs. himself 2) Read the following sentences that reflects...
December 11, 2014

English
Basically Telephone Conversation
December 9, 2014

English
Three pieces:Senghor,Soyinka,Achebe
December 9, 2014

English
Which of the following lines from the poem best shows the speaker's distaste for the situation? A)Silence. Silence transmission of Pressurized good breeding? B)OR VERY DARK?" Button B. Button A. Stench. C)Pushed dumbfounded to beg simplification. D)Her assent was very...
December 9, 2014

English
yes
December 9, 2014

English
In "Telephone Conversation," which of the following best describes the shift in the speaker's attitude towards the landlady? A)from fuming to mischievous B)from angered to conciliatory C)from embarrassed to arrogant D)from cooperative to ninchalant
December 9, 2014

Maths
The first term of an AP is 12 and that of a GP is 6. The common difference and the common ratio are equal, so as are the sum of the fist 3 terms. Find the possible values of the common difference?
December 1, 2014

math
Cut the cake in half. Cut the two half into 4th. Then cut each of the two halves into 2. You then get 16 pieces Fraction for the whole cake: 16/16 for half of cake ts 8/16 for the piece she ate 8/16 x 1/4 =2/16 she ate 2/16 of the whole cake the remaining piece 8/16 x 3/4 = 6/...
December 1, 2014

physics
A constriction in a pipe reduces its diameter from 7.9 cm to 1.8 cm . Where the pipe is wider, the fluid velocity is 8 m/s. Find the fluid velocity where the pipe is narrow. Answer in units of m/s
November 6, 2014

physics
A circular swimming pool has a flat bottom and a 4.39 m diameter. It is filled with water to a depth of 1.51 m. There is 1.36 atm of pressure on the top surface.
November 6, 2014

physics
What force F must be applied to the small piston to maintain the load of 49 kN at a constant elevation?
November 6, 2014

physics
If the average gauge pressure in the vein is 14400 Pa, what must be the minimum height of the bag in order to infuse glucose into the vein? Assume that the specific gravity of the solution is 1.05. The acceleration of gravity is 9.8 m/s
November 6, 2014

physics
A 73 kg man in a 4.3 kg chair tilts back so that all his weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area of radius 1.5 cm. Find the pressure exerted on the floor by each leg. The acceleration of gravity is 9.8...
November 6, 2014

Calculus
It is known that the quantity demanded of a certain make of portable hair dryer is x hundred units/week and the corresponding wholesale price is shown below where p is in dollars. p = sqrt(225 - 5x) The supplier will make x hundred units of hair dryers available in the market ...
September 25, 2014

Reading
ohh okay so it must be A? my second choice is A
September 17, 2014

Reading
8. in which sentence is the word gesture used correctly ( 1 point) A.Smiling, she extended her hand in a gesture of friendship. B.Tired from a long day of work, I put my gesture down on the table wearily.**** C.He called for a gesture next Tuesday, and all employees are to ...
September 17, 2014

science
i say yes is that right?
May 6, 2014

science
Is it ture that air molecules have weaker attractions then water molecules? A.Yes B.No
May 6, 2014

3 questions~~~
1.B 2.C 3.C Ms.Sue is my answers right for these questions??
April 12, 2014

Math
If a boat rental company charges 100.00 a day plus .50 per kilometer and another company charges 90.00 a day plus .60 per kilometer, at how many miles would the bill at both companies be the same?
January 30, 2014

science
Earth is a satellite because it moves around the sun.
January 30, 2014

Math
A candle has length 25 cm. Once lit, the candle burns away at a constant rate of 0.6 cm per minute. What is the length of the candle (in cm) 20 minutes after it is lit?
September 22, 2013

programming
where are the errors the pseudocode debugging exercise // This application reads student typing test data // including number of errors on the test, and the number // of words typed per minute. Grades are assigned based // on the following table: // Errors // Speed 0 1 2 or ...
September 15, 2013

programming
trying to debug pseudocode 2. Th e Springwater Township School District has two high schools—Jeff erson and Audubon. Each school maintains a student fi le with fi elds containing student ID, last name, fi rst name, and address. Each fi le is in student ID number order. ...
September 4, 2013

programming
DEBUGGING // The two senior class homerooms at Littleville High School // are having a fundraising drive for the prom. Each time a student // solicits a contribution, a record is created with the // student's name and the value. Two files have been created for Homeroom A ...
September 1, 2013

programming
Find Bugs in the pseudocode start Declarations num category num SIZE = 5 num QUIT = 9 num sales[SIZE] = 0, 0, 0, 0, 0 string HEAD1 = "Sales" string HEAD2 = "Category Number of Sales" output "Enter category ", QUIT, " to quit " input ...
August 30, 2013

LBCC
78125
April 7, 2013

Math
Kathy drove from Dry Creek to Cactus, a distance of 250km. She increased her speed by 10km/h for the 360km trip from Cactus to spur. If the total trip took 1 hours, what was her speed from Dry creek to Cactus.
April 7, 2013

Just some LA q's, Ms.Sue please
so what was the answer
February 7, 2013

math
A runner starts a race at the starting line. A second runner starts at 44 yards. If the first runner moves 7 yards each second and the second runner moves 3 yards each second, at what distance will the first runner catch the second runner?
January 14, 2013

language
introduction for an essay . show me please
October 2, 2012

english
what is a simple predicate in a well-fed lion will be peaceful thank you
August 31, 2012

calculus
a graph shows the divends declared per share of stock for the colgate-palmolive company for the years 1988 through 1998. Find the slope of the line segment connecting the years 1988 and 1998
August 22, 2012

statistics
Considering that a researcher can test at the <p = .05 (95%), p = .01 (99%), or p = .001 (99.9%) level for statistical significance, how would you use these three levels in relationship to risk to patients in implementing the decisions of your research?
June 16, 2012

Math Models
The distance needed to stop a car (d) varies directly with the aquare of the speed of the car (s). If a car traveling 25 mph requires 0 feet to stop, how many feet will be required to stop a car that is traveling at 60 mph?
June 13, 2012

Chemistry
What massof iron is contained in 86.6 grams if FeSO4?
June 12, 2012

Statistics
The Arcade shack is a manufacturing plant located in San Diego where 800 factory workers are employed. The personnel department selected 36 factory employees at random for the statistical study. construct a 95% interval for the percentage of males in the 800.
May 23, 2012

math
Look at the list. 7 is in all of the lists, so 7 is the answer. 1,1=2 1,2=3 1,3=4 1,4=5 1,5=6 1,6=7 ---------------------------------- 2,1=3 2,2=4 2,3=5 2,4=6 2,5=7 2,6=8 ---------------------------------- 3,1=4 3,2=5 3,3=6 3,4=7 3,5=8 3,6=9...
April 11, 2012

business
Lansing Auto Pats, Inc., has projected sales of $25,000 in October , $35,000 in November, and $30,000 in December of the company’s sales 20 percent are paid for by cash and 80 percent are sold on credit. The credit sales are collected one month after the sale. Determine ...
March 20, 2012

Chemistry
A solution is prepared by adding 50.3 mL of concentrated hydrochloric acid and 16.6 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint: Concentrated HCl is 38% HCl...
February 28, 2012

Finite with Calculus Applications
The Ball Company manufactures three types of lamps, labeled A,B,and C. Each lamp is processed in two departments, I and II. Total available work-hours per day for departments I and II are 400 and 600, respectively. No additional labor is available. Time requirements and profit...
February 27, 2012

Chemistry
Consider the reaction below. 3 O2(g) --> 2 O3(g) At 175°C and a pressure of 128 torr, an equilibrium mixture of O2 and O3 has a density of 0.168 g/L. Calculate the Kp for the above reaction of 175°C
February 20, 2012

Chemistry
The equilibrium constant Kp for the reaction below at 700°C is 0.76 atm. CCl4(g) --> C(s) + 2 Cl2(g) Determine the initial pressure of carbon tetrachloride that will produce a total equilibrium pressure of 1.20 atm at 700°C
February 20, 2012

math
Five years ago, you bought a house for $151,000, with a down payment of $30, 000, which meant you took out a loan for $121,000. Your interest rate was 5.75% fixed. You would
November 14, 2011

eng 125
How is the more direct performative aspect of drama and/or poetry reflected in these forms?
November 10, 2011

eng 125
Reflecting on this week’s literary readings, as well as your own reading experiences, identify at least one major similarity and one major difference between the forms of the short story and the poem. How do the differences between these literary forms affect how you read...
October 27, 2011

physics
Suppose that it takes 10.0 h to drain a container of 5100 m3 of water. What is the "mass flow rate," in kilograms per second, of water from the container?
August 26, 2011

algebra1
1/2x-6=5
July 19, 2011

algebra1
1/2x-6=5
July 19, 2011

math
a farmer plants a square block of trees. he plants another 25 tress and still has a square plantation. how many trees in the new plantation
February 13, 2011

math
5x^3y^4/14x^5y^-8
February 2, 2011

10th grade
log (x-9) - 109x=log 19
December 3, 2010

Math
a+c=8
November 26, 2010

Math
The side length,s, of a cube is related to its volume, v, by the formula s=v^1/3. A cube box when filled with materials has a volume of 729 cm2. What is the side lenth of the cube box used? Please help me step by step with this. I don't know where to start :(
November 20, 2010

Math
The side length,s, of a cube is related to its volume, v, by the formula s=v^1/3. A cube box when filled with materials has a volume of 729 cm2. What is the side lenth of the cube box used? Please help me step by step with this. I don't know where to start :(
November 18, 2010

4th grade science
What sea animal you get when you unscramble the letters gsntoe
October 25, 2010

Chemistry
many many many thanks. I can't tell you how long I've been working on figuring this one all out. Your help is very much appreciated not only because you helped answer it but because you helped me understand it.
October 19, 2010

Chemistry
Thank you for your help. I did want to clarify why you are only calculating the Molar Mass for H2 and not the molar mass for H2O (or even H2O2). I'm not sure why you did this. Please clarify. See below: The following reaction represents the decomposition of hydrogen ...
October 19, 2010

Chemistry
The following reaction represents the decomposition of hydrogen peroxide 2H2O2 -> o2 (g) + 2H2O (l) How many molecules of water are produced from the decomposition of 3.4g of Hydrogen peroxide, H2O2? Please walk me through this one, I need more then just the answer, I need ...
October 19, 2010

Chemistry
Hi I just wanted to verify a few answers to chem questions I'm working on. Was wondering if anyone could help? 1. Calculate the molar concentration of 2.34g of lithium hydroxide, LiOH disolved in water to make 750ml of solution. My answer was CLiOH = 0.133 mol/L nLiOH = 2....
October 17, 2010

algebra
2/3m + 17 = 17
October 13, 2010

math 5th grade
I don't now
August 26, 2010

Physics
A 2.1 kg particle-like object moves in a plane with velocity components vx = 30 m/s and vy = 55 m/s as it passes through the point with (x, y) coordinates of (3.0, -4.0) m. (a) What is its angular momentum relative to the origin at this moment? kg · m2/s (b) What is its...
July 30, 2010

Medical Physics
Independent does not mean mutually exclusive, thus P(EUF)=P(E)+P(F)-P(EnF) Independence allows us to write: P(EUF)=P(E)+P(F)-P(E)P(F) P(EUF)=P(E)+[1-P(E)]P(F) Therefore, P(F)= [P(EUF)-P(E)]/[1-P(E)] P(F)=[0.3-0.2]/[1-0.2] =.1/.8 =1/8
July 27, 2010

Social Studies
How did the principles of the Enlightenment affect the production and development of European art
May 31, 2010

Social Studies
Explain how the gardens of Versailles reflect the political atmosphere of King Louis XIV's France?
May 30, 2010

Chemistry
calculate the molality of a solution of 3.76g NaOH in 85.0g H2O
April 26, 2010

college financial planning
How do i prepare journal entries when they ask you to record perpetual system merchandising transactions of a company?
March 7, 2010

math
Write an equation form of each number using the digits 2, 3, 4 and 5 in each exercise. The expression should contain an exponent. Use each digit once. 1. 27= 2.5 = 3. 1 =
January 26, 2010

  1. Pages:
  2. 1
  3. 2
  4. Next>>