Monday
May 2, 2016

# Posts by robert

Total # Posts: 931

Algebra Help
I have a question regarding this problem below? I noticed it in an eariler post, and have come to figure that my text book has it like this? What would be the solution for this? x+sqrt(11-x)= 5 x = 2? OR 2,7? OR NO solution? I say x = 2 only? Any Thoughts?
August 3, 2009

calculus
The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. If two light sources, one three times as strong as the other, are placed 11 ft apart, how far from ...
June 30, 2009

Algebra
Exrpess each number in terms of i a. root-21 b. -root-59 c. -root-9 d. root-28
June 23, 2009

Communications Theory
Thank you! I am leaning towards Socio-Psychogical. Thank you all for your insight!
June 21, 2009

Communications Theory
Something like that. I need to know what his work fell into based on the 7 traditions of communication. Which of the seven best defined hs work? Rhetorical Semiotic Phenomenological Cybernetic Socio-Psychological Socio-Cultural Critical I would say either of the last 3. What ...
June 21, 2009

Communications Theory
Which of the larger 7 traditions of communication does Gerbner's work fall into?
June 21, 2009

Algebra
When Let f (x) = x^2 – 3x + 8 and g(x) = x – 5 Find Find the composite function of (fºg)(x) and simplify Find (fºg)(2) Find the composite function (gºf)(x)
June 17, 2009

Math
what is the square root of negtive 80
June 17, 2009

Algebra
I need to find the quotient function of the following: Given that f(x)=x^2-3 and g(x)=2x+1 find each of the following if it exists: a. (f/g)(-root3) b. (g/f)(-1/2)
June 14, 2009

lit
The Theme and writting style
June 14, 2009

Algebra 1
3(x-2)>4(2x+11)
May 20, 2009

Earth Science
51,988.63 repeated
May 11, 2009

computers
To present displays and information, usually in slides.
May 9, 2009

Math
If every seven digit whole neumber is a possible phone number, except those that begin with 0 or 1, what fraction of telephone numbers begin with 9 and end with 0?
May 3, 2009

Math
240-80 = 160 acres Sunflowers = 80 acres flax
March 30, 2009

Economics (attempted as suggested by economyst)
a. 60 b. 60 c. 30*30+12=912 d. atc= (3600+60*30)/30=180 e. increasing, decreasing
March 30, 2009

Spanish
I am sorry, but I am not familar with Sra. Does she usually check this site frequently?
March 30, 2009

Spanish
March 30, 2009

Spanish
March 30, 2009

Spanish
Please help me translate. Dear Juan, If you do not want your girlfriend to leave, you need to listen to me carefully. You were wrong. In a relationship, no matter the situation, the guy is always wrong. Be a man and tell her you made a mistake. I am sure she would appreciate ...
March 30, 2009

Help with Translation
March 30, 2009

Help with Translation
Please help me translate this short letter. Dear Juan, If you do not want your girlfriend to leave, you need to listen to me carefully. You were wrong. In a relationship, no matter the situation, the guy is always wrong. Be a man and tell her you made a mistake. I am sure she ...
March 30, 2009

Literature / Short story I
ccacddcacbbcdbbddab
March 13, 2009

Algebra
Thanks for the help!
February 24, 2009

Algebra
This is what I got. Which is correct? I don't know if you -6 - - 2 = -6 + 2 = -4 -1 + 3 = 2 -4/2 = -2 Slope m = -2
February 24, 2009

Algebra
Find the slope of the line that goes through the given points. I would apprecaite some feedback to this ?, but I think I have an idea how to figure it out! (3,-2),(-1,-6)
February 24, 2009

Math
I need 3 ordered pairs of points that would be solutions to this equation. Can anyone help please, thanks! 4x - y = 7
February 19, 2009

Math
The defining of reproducable physical measurments was made in a way that allowed scientests to validate each others findings. The boling point of pure water at 1 atmosphere of pressure is by defination 100 degrees C. For every day common use 1 standard atmosphere of pressure ...
February 5, 2009

PhYSiCs
A two end open pipe organ's sixth harmonic is produced by a tuning fork with a frequency of 440 Hz. If it is 17 degrees Celsius, what is the length of the tube?
February 3, 2009

Math 116A
I have been out of school for a very long time and I just enrolled to take some classes online and I am having a lot of trouble with my math. I just cannot seem to understand what it is that they want. Is there anyone that can help me with this. I am desperate. We are doing ...
January 24, 2009

Chemistry
Spectrophotometric measruments give us a little information about the comlpexity of the fractions that we obtain by solid phese extraction. To determine the identity and number of the compounds each fraction has , what should we do?
December 9, 2008

Chemistry
A solid-phase extraction cartidge has C18 material. What is the reason behind that all the characteristic grape juice color get transferred to the packing material of the cartridge?
December 9, 2008

PhYsIcS - RoTaTiOnAl MoTiOn
Oh, so you just convert the rotational motion into linear motion that can be used in a kinematic equation! Now I get it! Thanks!
December 7, 2008

PhYsIcS - RoTaTiOnAl MoTiOn
I know you use deltaTheta = 1/2(wi + wf)deltaT, but I don't know how to solve for the wf or t of the mud (the final velocity or the time it's in the air)
December 7, 2008

PhYsIcS - RoTaTiOnAl MoTiOn
A tire (0.8 m diameter) starts at rest and has an angular acceleration of 5 rad/s^2. If it moves for 10 seconds and then stops abruptly causing a blob of mud at the top of the tire to fly off, how far along the ground will the blob travel until it hits the ground?
December 7, 2008

functions
sin(15) = sin(45-30) sin(45)cos(30) - cos(45)sin(30) ^ Plug in values
December 7, 2008

Square roots
sqrt(1440) = 37.94733192
December 7, 2008

Physics - Rotational Motion
Whichever one is the easiest to analyze.
December 7, 2008

Physics - Rotational Motion
The 2d drawing that goes with #2 shows a circle at the top of an incline. \
December 7, 2008

Physics - Rotational Motion
(#1.) A top starting from 40 rad/s takes 200 rad to stop. What is its rotational acceleration? (a constant) (#2.) A stationary 100 Kg circular object (r= 0.20 m) is on a 35 degree incline. The coefficient of rolling friction between the block and the incline is 0.01. If it ...
December 7, 2008

Physics - Rotational Motion
(#1.) A top starting from 40 rad/s takes 200 rad to stop. What is its rotational acceleration? (a constant) (#2.) A stationary 100 Kg circular object (r= 0.20 m) is on a 35 degree incline. The coefficient of rolling friction between the block and the incline is 0.01. If it ...
December 7, 2008

AP US History
December 1, 2008

Math
how could you use 5 x 6 = 30 to find the product of 6 x 6
December 1, 2008

AP Chemistry
all three?
November 28, 2008

AP Chemistry
Consider a 50.4 g sample of H2O(g) at 115°C. What phase or phases are present when 156 kJ of energy is removed from this sample? Specific heat capacities: ice, 2.1 J/g·°C; liquid, 4.2 J/g·°C; steam, 2.0 J/g·°C, ÄHvap = 40.7 kJ/mol, &...
November 28, 2008

Chemistry
Hi everyone, I'm having problems with effective nuclear charge. Regarding these problems. Calculate Zeff for a valence electron in an oxygen atom. and Calculate Zeff for the 4s electron in a copper atom, . and Calculate Zeff for a 3d electron in a copper atom, Cu. Like for...
November 9, 2008

urgent Help .. Chemistry
If you assume that an atom is a hard sphere, you can estimate the average volume of space it occupies using basic geometry. Estimate the volume,V , of one sodium atom (Na) using its metallic radius of 186 pm . Express your answer in cubic picometers.
November 9, 2008

chemistry
reaction between CuSo4+NaCl
November 4, 2008

physics
A 2 gram bullet traveling at 1500 m/s [East] hits a 200 g block of wood at rest, and becomes embedded in it. If the block is suspended by long ropes, how high will it travel before it comes to rest?
November 3, 2008

social studies
What was the type of ship that Hernando Cortes sailed? Thank you.
October 26, 2008

College Physics
Yeah this is from a physics lab. It was for a "Energy Works" lab where we trying to proof conservation of energy. Total energy = KE + Ug. We had a 2.2m long Dynamics Track with Dynamics cart. We used a "riser block" which was a wooden block to raise the ...
October 25, 2008

College Physics
Let's say you measure an average acceleration to be 0.3883 ms-2. What is the height (in centimeters) of the riser block? Assume the legs of the track span 1.0000 m and that there is neither friction nor drag. Also assume the block is under one of the legs. cm Use three ...
October 25, 2008

....... capacity is the largest numbers of individuals of one species that an ecosystem can support over time. What kind of capacity???
October 22, 2008

Science
The maximum rate of increase for a population is its......... potential.
October 22, 2008

Chemistry (Orbital help needed)
I just want to make sure I'm doing this right... (Numbers in brackets are the square roots or electrons) "How many orbitals are completely filled in an atom that has 12 electrons? The electron configuration is 1s[2]2s[2]2p[6]3s[2]?" It would be 2 right? I'm ...
October 22, 2008

Project Management
How does the design phase of the project management life cycle differ in content and importance from the other phases?
October 21, 2008

government
durrrr..
October 19, 2008

math
A science workbook is 0.75 inches thick. How many workbooks will fit on a 2-foot shelf? what is the equation? estimation?
October 17, 2008

math
A science workbook is 0.75 inches thick. How many workbooks will fit on a 2-foot shelf? what is the equation? estimation?
October 17, 2008

math
A science workbook is 0.75 inches thick. How many workbooks will fit on a 2-foot shelf? what is the equation? estimation?
October 17, 2008

Project Management
List the personal and professional characteristics necessary to be an effective project manager. What characteristics are learnable?
October 8, 2008

chemistry
yes that solved everything thanks!
October 4, 2008

chemistry
Ibuprofen, the active ingredient in Advil, is made up of carbon, hydrogen, and oxygen atoms. When a sample of ibuprofen, weighing 5.000 g, burns in oxygen, 13.86g of CO2 and 3.926 g of water are obtained. What is the simplest formula of ibuprofen? I need to find out if I'm...
October 4, 2008

ALGEBRA
can you help me with this. d dont get it at all :( let n be the number used for the given number puzzle. use algebra to show how the puzzle works. 1. pick a number 2. subtract 9 3. multiply by 6 4. divide by 3 5. add 18 6. subtract twice your original number You will always ...
September 24, 2008

Chemistry
Imagine that you have a 6.00L gas tank and a 4.00L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 145atm , to what pressure should you fill the...
September 21, 2008

Physics
Oh okay thank you very much.
September 16, 2008

Physics
Hey I'm not sure how to solve this problem: An 1840 kg car is moving to the right at a constant velocity of 2.94 m/s. What's the netforce? What's the netforce if the car would be moving to the left? I'm thinking that the net force going right and the net force ...
September 16, 2008

accounting
i HAVE A BALANCE SHEET FOR A COMPANY AND i WOULD LIKE FOR SOMEONE TO TELL ME IN LAYMAN TERMS WHAT IT SAYS
September 12, 2008

computers
Why do you think the requirements analysis process is so difficult?
September 9, 2008

Critical Thinking
I could not identify vague, ambiguous, or rhetorical devices in this article. Can you tell me if I am missing something? John Kerry is making the outsourcing of jobs by American companies a centerpiece of his campaign, telling audiences that ''because of George Bush&#...
September 6, 2008

Biology
The following chemicals have the indicated formula weight Surcose = 342.3g; Potassium dihydrogen=136.09; and Tris=121.14 Also the following solution already made: 20%SDS, 5M NaCl, 500mM EDTA. You have a 40% glycerol solution, and 10X TBE. List the step to make the following ...
August 27, 2008

Physics
Given the initial position of a particle is x(0)=2m at t(0)=0s. At t=2s, what are the particle's (a) position, (b) velocity and (c)acceleration?
August 26, 2008

Grammer questions check
Identify the locations or locations where apostrophe errors occur: (A) When the dog knocked over it's (B) bowl, the little girl claimed that the dog wasn't (C) her's
August 13, 2008

calculus
what is the integral of x^(2)arctan(6x) dx?
May 22, 2008

math
a ______________ is a mathematical rule.
May 21, 2008

math
what is a mathematical rule?
May 21, 2008

novel
1)B 2)C 3)C 4)D 5)D 6)C 7)B 8)B 9)C 10)B 11)A 12)C 13)A 14)B 15)D 16)C 17)A 18)D 19)A 20)D
May 21, 2008

Chemistry -- to Dr.Bob
whom should i link up with to meet the challenge of spending the next two hours blowing up rubber balloons by mouth besides old huff and puff luc,eh what?I`m woefully loneley for Mr.Adams.Thanks
May 2, 2008

English
Summarize Paris' request of Capulet, and Capulet's response?
April 11, 2008

math
which allows you to convert pounds and tons to ounces?
April 7, 2008

creating surveys
how to create a survey
March 30, 2008

Accounting
Identifying and journalizing Closing Entries Klein Photography
March 5, 2008

non fiction
An enjoyment of solitude
March 3, 2008

Math (Geometry)
I only describe one because that is the one I am having trouble with, the others were simple since it would show a figure composed of 5 triangles and only 2 would be shaded. (2/5)
February 29, 2008

Math (Geometry)
"Target Games: Darts are thrown at each of the boards shown below. A dart hits the board at a random point. Judging by appearances, find the probability that it will land in the shaded region." This figure is a diamond (the diamond is not shaded) and it has half a ...
February 29, 2008

history
which sides slave on during the Civil war? and why did they switch side?
February 25, 2008

history
why most American slaves dont have birth record?
February 24, 2008

math
Discuss the relationship between the graphs of the lines with equation y = mx +2, where m is any real number.
February 22, 2008

Math (Geometry)
Yeah it left me clueless too, oh well, I will just have to hope I get them right. XD
February 21, 2008

Math (Geometry)
See thats exactly what I thought, the 22% one was #1 but when I checked it in the back of the book it said it should be 25. Could the book be wrong? (It also says #3 should be 32)
February 21, 2008

Math (Geometry)
"The graph shows types of trash in a typical American city. Find the measure of each central angle to the nearest whole number." (I do not want all the answers, I just want to know HOW to get them so I will only post the first three problems that corresponds with the...
February 21, 2008

Spelling
Hello Can Anyone help me spell the word ( ACK-ROW-NIM ) For Instance DOB Is An ACK ROW NIM For Date Of Birth. THANK YOU in Advance Robert
February 10, 2008

chemistry
A saturated solution of ammonium sulfate, (NH4)2SO4, in water at 30 0C contains 78.0 g (NH4)2SO4 per 100.0 g H2O. What is the molality of this solution?
February 5, 2008

Physics
A 40.0kg child is in a swing that is attached to ropes 2.00m long. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions: a) When the ropes are horizontal b) When the ropes make a 30.0 ...
February 5, 2008

history
what is The trans-Atlantic slave trade and its most lasting consequence.
February 5, 2008

math
A figure is transformed into a new figure by being rotated 180 degrees, translated left 6 units, and dilated by a factor of 4. How are the old and new figures related? a)both congruent and similar b)congruent but not similar c)similar but not congruent d)neither similar and ...
January 31, 2008

math
Factor (15a squared bc squared -9a squared b to the fourth c) by finding the gcf. I think the answer is 3abc(5ac-3ab3). I got it because I found the gcf of the coefficents which are 3. I subtracted one from each exponent so, i canceled b from 15a squared bc squared and c from-...
January 31, 2008

math
A transversal intersects two parallel lines and forms eight angles. Which of the following statements is false? a)alternative interior angles are always congruent. b)corresponding angles are always congruent. c)adjacent interior angles are always supplementary d)exterior ...
January 31, 2008

math
line xy is translated 3 units to the left. if a point on line xy is located at (2,11), where would the equivalent point be on line X and Y prime? a)(2,14) b)(2,8) c)(-1,11) d)(5,11) I think the answer is c. What I did is move the point 3 units to the left and and subtracted 3 ...
January 31, 2008

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