Wednesday
December 7, 2016

Posts by katrina

Total # Posts: 251

Calculus (pleas help I really need help with this)
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter. h=______ w=______ What...
April 10, 2011

Calculus (please help!!!!)
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter. h=______ w=______ What...
April 10, 2011

Calculus (please help!!!)
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter. h=______ w=______ What...
April 10, 2011

Calculus
Hi, I wasn't posting under different names, I have just used my name and I was just posting the explanation I received from other tutor, I didn't understand some of it so I posted it again because right now it must be on page 5 or something like that... I'm not ...
April 10, 2011

Calculus
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of the reaction, the ...
April 10, 2011

Calculus please help!!
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter. h=______ w=______ What...
April 10, 2011

Calculus
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of the reaction, the ...
April 10, 2011

Calculus (please help!!!)
Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter. h=______ w=______ What...
April 10, 2011

Calculus
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of the reaction, the ...
April 10, 2011

Calculus
HI, Thanks for the explanation, that makes a lot of sense, I don't know why it didn't occur to me that mass can't be negative... but I typed those answers and I still get them both wrong... I don't know why...
April 10, 2011

Calculus
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of the reaction, the ...
April 10, 2011

precalculus
For the Function, y= x(x-4)(x+8) Y-intercept is: X-intercept is:
April 4, 2011

Chemistry
Calculate the pH after 0.13 mol of NaOH is added to 1.00 L of the solution that is 0.57 M HF and 1.13 M KF. I got the answer of 3.66 to 3 sig figs, but it's wrong. Can you please tell me what I did wrong? -Thanks
March 27, 2011

precalculus
Twenty percent of a radioactive substance decays in ten years. By what percent does the substance decay each year?
March 3, 2011

precalculas
The doubling period of a baterial population is 20 minutes. At time t=100 minutes, the baterial population was 80000. What was the initial population at time t=0? Find the size of the baterial population after 4 hours.
March 1, 2011

precalculas
the amount of bacteria in a petri dish increased by a percent change of 12% each hour over a period of 15 hours. a. find the growth factor for 1 hour? b. by what total percent did the bacteria change during this 15- hour time period.? c. how long will it take for the bacteria ...
March 1, 2011

precalculas
Given the function f(x)= 4+4x^2, calculate the following values: [f(a+h)-f(a)]/h
February 26, 2011

precalculas
i tried like 7 times stil getting it wrong.
February 25, 2011

precalculas
Let f(x) be the function 8x^2-5x+2 . Then the quotient [f(5+h)-(5)]/h can be simplified to ah+b for: a= b=
February 25, 2011

precalculas
Let f(x) be the function 1/[x+12] . Then the quotient [f(4+h)-f(4)]/h can be simplified to for: -1/[ah+b] a= b=
February 25, 2011

Chemistry
I did those steps and got .869 for CH2Cl2 and .130 CH2Br2 (assuming that both is in the correct number of sigfigs), but they don't seem to be right. I just want to know what I am doing wrong, or is this also the answer you got.
February 20, 2011

Chemistry
A solution is prepared by mixing 0.0400 mol CH2Cl2 and 0.0700 mol of CH2Br2 at 25°C. Assuming the solution is ideal, calculate the composition of the vapor (in terms of mole fractions) at 25°C. At 25°C, the vapor pressures of pure CH2Cl2 and pure CH2Br2 are 133 and...
February 20, 2011

precalculas
f(x)=2-9x find f^-1(6)
February 13, 2011

Chemistry
A 13.0-g sample of ice at -13.0°C is mixed with 112.0 g of water at 80.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g · °C, respectively, and the ...
February 13, 2011

math
f(x)=2-9x find f^-1(6)
February 11, 2011

psychology
you are conducting research on sex differencesin emails .Your hypothesis is that the men use more declarative statements and women use more questions.what might be the advantages of using the archival method
February 4, 2011

math
Plot the points A(2,2), B(4,6),C(10,-2)Notice that these points are vertices of a right triangle (the angle is 90 degrees). Find the area of the triangle ABC:
February 3, 2011

math
Find the point (o,b) on the y-axis on the y-axis that is equidistant from the points (1,1) and (2,-1)
February 3, 2011

calculus
suppose the endpoints of one side of a rotated square are (-5,-5) and (1,-1). Find the dimensions and area of the square
February 3, 2011

personal planning
what types of diseases can you get if you are unhealthy?
January 26, 2011

humanistic theory
People often make career changes in their lives. How would the humanistic theory of behavior explain this phenomenon?
December 3, 2010

math
He becomes an electrician
November 30, 2010

poetry
What is the meaning of the phrase "steal the secret of the sun"
November 15, 2010

math
If 3 men who are yhe same in size need to drink 12 glasses of milk in a certain time, how many glasses of milk will 7 men who are the same size as them need in the same time frame they needed 12 glasses?
November 11, 2010

math
Estimate to the nearest 100 if you have: a) 56 293 b) 6 521 308
November 11, 2010

math
a) how many tens are in 1000? b) how many hundreds are in 6000? c) how many thousands are in 2 000 000?
November 11, 2010

Science
Human caused chemical changes would be I think greenhouse gases,and water pollution.
November 10, 2010

Bassick High School
this is the work on how to do it Vf = Vi+at Vf = 1.3+0.09*10 = 2.2 m/s b. jogging
September 7, 2010

Bassick High School
the speed after 10.0s is 2.2 m/s she is jogging
September 7, 2010

medical coding 1
exam 22111063
August 3, 2010

Algebra
Solve the system by either elimation or substitution: x+8y=18 y=-2/7x-18/7
August 2, 2010

math
1/2a-5=1/3a-1 please show me how to set this problem up and solve it
July 19, 2010

macroeconomics
Cyclical unemployment arises in part from a desire by workers to move from low-paying,low-productivity jobs to higher-paying, higher productivity jobs.
June 9, 2010

college:Macroeconomics
Which of the following is not economic investment? (a). The purchase of 100 shares of AT&T by a retired business executive. (b). The purchase of a drill press by the Ajax Manufacturing company. (c). Construction of a suburban housing project. (d). The piling up of inventories ...
June 5, 2010

college: ECON
Are you still looking for the answer.
June 5, 2010

college: ECON
The answer is true or false.
June 5, 2010

Math
A hat contains 20 names, 9 of which are females. If 8 names are randomly drawn from the hat, what is the probability that at least 6 male names are drawn??????
June 1, 2010

french
im begging you! somebody pleaaaaaase help me on this! i have about 5 hours before its due!!
May 26, 2010

french
if anyone would have the heart to look up cars of the 60's and write out a small paragraph in french about them too, i would be forever grateful!!!
May 26, 2010

french
PLEASE HELP !! i really need this translated !
May 26, 2010

french
How do u say: In the 60's, people listened to the Beatles, Francois Hardy, Gilles Vigneault, Jacques Dutronc, Bridgitte Bardot, and Buffy Sainte-marie. The beatles was a soft rock band that formed in liverpool in the 1960's. John Lennon was the lead vocalist while Paul...
May 26, 2010

12th grade
The Swiss franc is selling for $.7681 and the British pound is selling for $1.6581. The cross rate between the franc and the pound is? I figured out 2.16 but I have so much scribling over it I cant now refigure it out with our gettting it correct again. Can someone simplify ...
May 12, 2010

math
If one clerk can process 75 pieces of mail in 2 and 1/2 hours, how long will it take eight clerks to process 1620 pieces of mail if all of them work at this same rate?
April 28, 2010

Accounting
How do I balance out the adjustments made by the extra information?
April 18, 2010

health
How do factors in the biopsychosocial model operate when you make a decision that affects your health? Think of examples of when you made either good or poor decisions. The health consequences of your decisions can be minor or major.
April 14, 2010

Accounting
i got the trial balance but I am trying to figure out how to get my adjustments correct what about you?
April 12, 2010

English
The mom left the room with an modicum of respect after her baby began? Sleeping Screaming Praying Singing
April 5, 2010

5th grade math - multiplying decimals
89
February 10, 2010

Math
What would the absolute value be? \ 2-3\ if you solve it the answer comes to -1 but can you have a negative as your answer for absolute value?
February 5, 2010

3rd grade
cheerios
February 3, 2010

popular american culture
how can i post my essay to this website and then i might can get the help i need because im getting cluster with fusturated please help me
February 3, 2010

popular american culture
hi i had to write a paper on print media and i sent my paper though writepoint and it said that this phrase of my paper was to wordiness and consider revising nothing inappropriate so what else could i say thank you
February 3, 2010

popular american culture
please forgive me just was typing in cap no disrepected to anybody. i need a good example of how to rewrite this fragment sentence the endeavor to influence a specific audience to buy a goods or service or a specific belief i need someone just to show me what wrong with this ...
February 3, 2010

popular american culture
how would i rewrite a fragment sentence for example THE ENDEAVOR TO INFLUENCE A SPECIFIC AUDIENCE TO BUY A GOODS OR SERVICE OR A SPECIFIC BELIEF SHOW ME HOW TO REWRITE IT PLEASE
February 3, 2010

college
I NEED A GUIDELINE ON HOW TO SET UP THIS COMPILE INVENTORY FOR POPULAR CULTURE THAT I COME IN CONTACT WITH I NEED TO DESCRIBE THE IMPACT THAT THESE ARTIFACT HAVE ON MY PERSONAL DESCISION MAKING I NEED TO IDENTIFY THE PATTERNS OR SIMILARITIES IN MY INVENTORY ALSO NEED TO ...
January 18, 2010

math
I have no idea how to do these please help(: evaluate each of the following 1. 81^-1/4 (81 to the negative power of one fourth) 2. 125^2/3 3. 64^-3/2 4. 4^3/2 answers and work please
January 6, 2010

math
I have no idea how to do these please help(: evaluate each of the following 1. 81^-1/4 (81 to the negative power of one fourth) 2. 125^2/3 3. 64^-3/2 4. 4^3/2 answers and work please
January 6, 2010

Geography
population growth
December 15, 2009

Geography
What does the federal government impose on a high horsepwer that uses more fuel vehicles?
December 11, 2009

Geography
What government imposed barriers stop or hinder the export (out of the U.S) of automobiles?
December 11, 2009

CRT 205
Your critical thinking analysis will possibly change the way some of your past communication could have been expressed differently.
November 26, 2009

Math
I just do not understandthe concept of this can some one make it more simple for me to understand? Remove parenthesis and simpilfy its not just this one its the whole understanding thing. 8p+5q-9(8p-8q+9r) I got -72+67q-81r
October 29, 2009

Math
I just do not understandthe concept of this can some one make it more simple for me to understand? Remove parenthesis and simpilfy its not just this one its the whole understanding thing. 8p+5q-9(8p-8q+9r) I got -72+67q-81r
October 29, 2009

Geography
what activiteis affect the level of a countrys economic developement?
October 18, 2009

Org. Chem.
why is water and tetrachloride immiscible
September 14, 2009

Math
there are 3 angles in a triangle
August 10, 2009

Algebra Word Problem Help
A gardener has 40 feet of fencing with which to enclose a garden adjacent to a long existing wall. The gardener will use the wall for one side and the available fencing for the remaining three sides. If the sides perpendicular to the wall have length x feet, which of the ...
August 8, 2009

Math Help Please
Which of the following expressions is equal to log (x sqrt-y)/z^5 A. log x + log (1/2) + log y– log 5 – log z B. log [x + (1/2)y – 5z] C. log x + (1/2)log y – 5 log z d. [(1/2) log x log y]/(5 log z)
August 3, 2009

Algebra
Express as a single logarithm and simplify: 2 log 3 + log (3x) – log x
August 2, 2009

Math
It's ok, I see how this is the answer now! Thanks again for your help!
July 7, 2009

Math
Would this [-infinity, -2] and [1, infinity] be the same and equal (-infinity sign,-2, U(1,infinity sign)
July 7, 2009

Math
Please help! They are asking for 2 solution sets and I don't know where to start. Thanks in advance! Solve and write interval notation for the solution set. 3 – 8x < –5 or 3 – 8x > 19
July 7, 2009

Algebra
An area, A, consisting of the sum of two squares is 1000. The side of one square is 10 less than 2/3 of the side of the other square. What are the sides of the squares?
June 30, 2009

Physics
Do atoms have colors? What colors are they? Are they all the same color, or are all carbon atoms one color and all hydrogen atoms a different color for instance? Or are they the color of the object? Thanks for your help.
June 10, 2009

Science
1. What is the relationship between elevation and average surface temperature? 2. What is the generalized relationship between latitude and average surface temperature..(I think it's that the higher the latitude, the colder the surface temperature)? 3. What is the ...
January 22, 2009

science
second grader. Please help me with examples of things I can investigate using the scientific method for my homework project. thank you.
November 6, 2008

algebra
How do I figure out 6(x+4)=3x-2? please help!
October 7, 2008

algebra
Thanks!
October 5, 2008

algebra
Then what do I do next?
October 5, 2008

algebra
Can you help me figure out this? 7+3x=5x+13
October 5, 2008

Algabra
208 times 50
October 3, 2008

photosynthesis and cellular respiration
Explain in what way ATP and ATD can be likened to a rechargeable battery
September 11, 2008

Chemistry
SO3 can be produced in the following two-step process: FeS2 + O2 ---> Fe2O3 + SO2 S02 + O2 ----> SO3 Assuming that all the FeS2 reacts, how many grams of SO3 are produced when 20.0 g of the FeS2 reacts with 16.0 g of O2?
June 30, 2008

Algebra II
y=5/x
March 9, 2008

Chemistry
How would you approach a question like There are 6.02x 10 to the power of 23 atoms in one mol of atoms, how many atoms are there in 5.5 mol of atoms?
February 5, 2008

Organic Chemistry
How do I draw the condensed formula for: 1. 2,3-dimethyl-2-butene 2. 4-ethyl-2-hexyne 3. 3,3,6-trimathylnonane 4. 3-ethyl-4-propylheptane 5. 3-octanol
September 30, 2007

Prairie View A&M University
Given that people with borderline personality disorder are impulsive, we would expect them to do poorly on tests that measure functioning of the____. Psychology question here. Personality disorders (PD) are a group of psychiatric conditions characterized by experience and ...
July 7, 2007

math
In the formula s=ut+1/2at square.Make a the subject of formula (b)find the values ot t when s=42,u=2 and a=8.Am getting difficulties in that number.
June 20, 2007

math
given that y-1/x +2=1/3 and y+3/3x-1 =5/2 find x and y.am not getting the right answer it should be 1,2. (y-1)/(x +2) = 1/3. Change to y - 1 = x/3 + 2/3 (y + 3)/(3x -1) = 5/2 Change to y + 3 = 15x/2 -5/2 4 = 45 x/6 - 2x/6 -15/6 -4/6 43x/6 = 43/6 x = 1 y -1 = 1/3 + 2/3 = 1 y=2
June 20, 2007

math
sorry its 5t+(6 times 10 power neg.3)....and the answer should be1.08 times 10 power -2) solve thi equation ;5t(6 multiply 10 powerneg 3)=(6 multiply 10 power negative 2).am not getting the right answer;it should be 91.08 multiply 10 power negative 2)
June 20, 2007

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