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Posts by Katrina

Total # Posts: 269

english
Corrections: Cancer is known as the unbiased killer; it does not discriminate in the race, age, or sex of it victims. Lung cancer is the number one cause of cancer deaths for United States men and women. Lung Cancer takes millions of lives each year, sometimes without the ...

statistics
From the Arizona Department of Weights and Measures: Among 31 inspections sat a NAPA Auto Parts store, 88% failed. X= ?

physics
A six kilogram object undergoes an acceleration of 2.0 meters per second squared. Part a. What is magnitude of the net force acting on the object? Part B. If the same force is applied to a 4 kilogram object what acceleration is produced?

Calc
If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height (in meters) after t seconds is given by H = 17t − 1.86t^2. (a) Find the velocity of the rock after one second. (b) Find the velocity of the rock when t = a. (c) When will the rock hit the...

math
(7+9)+3= 1+(9+5)=

Math
Find the cost function if the marginal cost function is dC/dx=2x-15 and fixed costs are $75.

Calculus
Find all points at which the graph of f (x) = x^3 −3x has horizontal tangent lines.

Chemistry
I need help writting a formula for: AgNO3(l) + PbNO3(l) + HgNO3(l) + HCl (l)

Chemistry
A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon?

Chemistry
3. A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon? 4. A 1.00 g Sample of C7H603 (s), us completely burned in a bomb ...

precalculus
Find an angle between o and 2pi that is coterminal with the given angle -8pi/3: 71pi/2: 11pi/7:

precalculus
Write and simplify the difference quotient for the function b(t)= 3t^2-4t+5 over the interval [7,7+h]

Calculus (pleas help I really need to check 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...

Calculus (please help I really need to check 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...

science
The resulting solution is saturated because 86 is what equals both of the grams of salt added to the water at degrees C. 15 g + 50 g = 86 grams

Calculus (pleas help I really need help with this)
The cross-sectional area is jus the rectangle...

Calculus (pleas help I really need help with this)
I tried that... it's not it... apparently there must be something wrong with the arythmetic but I can't find what it is...

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...

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...

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...

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 ...

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 ...

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...

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 ...

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...

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 ...

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...

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 ...

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

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

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

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.

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 ...

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

precalculas
i tried like 7 times stil getting it wrong.

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=

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=

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.

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...

precalculas
f(x)=2-9x find f^-1(6)

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 ...

math
f(x)=2-9x find f^-1(6)

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

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:

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)

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

personal planning
what types of diseases can you get if you are unhealthy?

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

math
He becomes an electrician

poetry
What is the meaning of the phrase "steal the secret of the sun"

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?

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

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

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

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

Bassick High School
the speed after 10.0s is 2.2 m/s she is jogging

medical coding 1
exam 22111063

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

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

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.

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 ...

college: ECON
Are you still looking for the answer.

college: ECON
The answer is true or false.

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??????

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

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!!!

french
PLEASE HELP !! i really need this translated !

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...

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 ...

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?

Accounting
How do I balance out the adjustments made by the extra information?

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.

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

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

5th grade math - multiplying decimals
89

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?

3rd grade
cheerios

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

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

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 ...

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

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 ...

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

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

Geography
population growth

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

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

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

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

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

Geography
what activiteis affect the level of a countrys economic developement?

Org. Chem.
why is water and tetrachloride immiscible

Math
there are 3 angles in a triangle

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 ...

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)

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

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

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

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

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?

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