Friday
July 25, 2014

Posts by sarah


Total # Posts: 3,841

Calculus
thanks!!

Calculus
Find a series ∑a_n for which ∑(a_n)^2 converges but ∑|a_n| diverges

US History
14. The main argument in support of the Bill of Rights was that A. they would help opponents of slavery gain the upper hand B.without them the US would be a republic government C.they would protect them the people from a tyrannical government D.without them the country would f...

pre calculus.
x is a first quadrant angle. In what quadrant(s) does the terminal side for 2x lie?

math equations
x=6

physics, HELP ASAP PLEASE!
a car starts and accelerates uniformly at a rate of 2.0 m / s ^ 2 in 6.0 s. Then, it maintains its constant speed for 30 seconds. Finally, the shrinkage slows down uniformly and stops to 5.0 s. find the total distance traveled by the car.

chemistry 12
If the pH of a solution is 3.5, what colour will be shown by each of the following indicators in the solution? a)Methyl Violet b) methyl red c) Methyl orange d) phenolphthalein My answers: a) Yellow to Blue b) Red to Yellow c) Red to Yellow d) close to a light pink almost colo...

Physics
What is the impact speed when a car moving at 95km/h bumps into the rear of another car traveling in the same direction at 93km/h?

Physics
A dynamite blast at a quarry launches a rock straight upward, and 1.5 s later it is rising at a rate of 19 m/s. Assuming air resistance has no effect on the rock, calculate its speed (a) at launch and (b)4.6 s after launch.

chem 12
Calculate [H3O] an [OH] for a sodium hydroxide solution having a pH of 12.5. I know this is a strong base, and i got the pH 12.5. But i don't know how to go from there.

chem 12
Okay so i got Ka = (x)(x)/0.15 = 6.5x10^-5

chem 12
Where i go from there **

chem 12
a) Calculate [H3O^+] in a 0.15M solution of benzonic acid, HC7H5O2(aq) having K of 6.4x10^-5. b) Calculate the per cent ionization of the HC7H5O2. I got.. Kb = [HC7H5O3][OH]/HC7H5O2 6.3x10^-5 x Kb =1.0x10^-14 Kb = 1.0x10^-14/6.3x10^-4 = 1.5x10^-10 1.5x10^-10 = (x)(x)/0.15 i...

College Chem
Write a balanced equation for each reaction including the state symbols of all the reactants and products Co(NO3)2. 6H2O + Ni(NO3)2.6H2O

childcare
In what ways can a child care centre program provide quality care for the child caregivers.

MSU
aluminum sulfate and sodium phosphate Express your answer as chemical equation.

MATH
At McLeod University, thirty percent of the students are in Engineering. Forty percent of Engineering students study Probabilistic Systems, and sixty percent of the students studying Probabilistic Systems are in Engineering. What percentage of students at McLeod are either in ...

chemistry 12
Calculate [H3O] an [OH] for a sodium hydroxide solution having a pH of 12.5. I'm having a hard time with this i'm not sure how to start it. Please help me!

math
solve for x AB=24, MB=2x+4

physics
A certain orthodontist uses a wire brace to align a patient's crooked tooth as in the figure below. The tension in the wire is adjusted to have a magnitude of 21.12 N. Find the magnitude of the net force exerted by the wire on the crooked tooth.

Chemistry
a) Calculate [H3O^+] in a 0.15M solution of benzonic acid, HC7H5O2(aq) having K of 6.4x10^-5. b) Calculate the per cent ionization of the HC7H5O2. I got.. A) 0.16M but i did it again and got 7.2M so i'm very stuck as to the very different answers i got. B) 12.4% ionization.

finance
$0.45 for each company

math
It's differentiable for every point besides at it's 2 vertexes or where the function equals 0. In this case, it's not differentiable at x = -1 and x = 1.

CHEMISTRY
For A) I got the correct answer from my ICE table (2.44) For B) I got 0.006 moles of C6H5COOH initially and 0.0045 moles of KOH was added. The excess C6H5COOH is 0.006 - 0.0045 = 0.0015 moles. I then converted the 0.0015 moles to M (mol/L) by multiplying by 1000/30. This is th...

CHEMISTRY
Suppose that 30.0 mL of 0.20 M C6H5COO(aq) is titrated with 0.30 M KOH(aq). a) What is the initial pH of the 0.20 M C6H5COOH(aq)? b) What is the pH after the addition of 15.0 mL of 0.30 M KOH(aq)? c) What volume of 0.30 M KOH(aq) is required to reach halfway to the stoichiomet...

Math
Yes, if the couples were not required to sit next to each other then the number of possibilities would be (8*7*6*5*4*3*2*1) = 40,320. I've taken Statistics at Georgia Tech and this was the fun part!!

Math
There are 384 possibilities.

Math
In the first seat: There are 8 possibilites for who sits there. In the second seat: There is only 1 possibility (the other member of the couple). In the third seat: There are 6 possibilites for who sits there. In the fourth seat: There is only 1 possibility (the other member o...

chemistry
A dilute aqueous solution of CaCl2 contains 0.159 grams of solute per liter of solution. It is fully dissociated. What is the osmotic pressure of the solution against a membrane at 20.0 °C?

chemistry
If 5 g of solid sodium hydroxide is dissolved in 100 mL of water, what is the molarity of the solution in moles of NaOH/L of solution (moles/L)?

Math
What do the fans sing at a university of California football games

Chemistry
If 1500. of hard water contains 0.019 and 0.0070 , how many moles of are needed to replace these ions? If the sodium is added to the water softener in the form of NaCl , how many grams of sodium chloride are needed?

Spanish-please check corrections
Please check if I composed and answered the quesions correctly. Someone told me corrections earlier and I did them-are they correct, now? Thank you 1.¿Te gusta vestirte en ropa casual o elegante? Me gusta vestir con ropa casual. 2.¿Prefieres levantarte temprano o...

Spanish-Please check
Did I write the questions correctly and did I answer these questions correctly? Thanks 1.¿Te gusta vestirte en ropa casual o elegante? Me gusta vestir con ropa casual. 2.¿Prefieres levantarte temprano o tarde? Prefiero levantarme temprano. 3.¿Dondé ...

chemistry
n = (pv)/ (RT) = (187.5 * 2.50) / (62.4 * 338) = 0.0222 mol H20 0.0222 mol H20 * 18.02g/mol = 0.4 g H20 vaporized

math
f(x)=8x-x2

Science
At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.4 m until, at t = 1.66 s, it is traveling east. The car does not alter its speed during the turn.

FRENCH
i tried but still found no answer

FRENCH
thats not an option on my sheet. greek is not an option?

FRENCH
which group of people first planted the grape vines: a) the romans b) the guals c) the french

FRENCH
k thanks :)

FRENCH
what about bc ms. sue?

FRENCH
2. the square kilometer area of british columbia is a)950,000 b) 820,000 c) 630,000

FRENCH
the square kilometer area of france is: a) 180,000 b)550,000 c)360,000

statistics
Suppose that is normally distributed with mean 90 and standard deviation 12. What value of does only the top 20% exceed?

science
A sample of metal has a mass of 94.5 grams and a volume of 7 civic centimeters. What is its density?

English/Lit
Thank you

English/Lit-recheck please
would it be diction?

English/Lit
I posted this earlier and someone suggested google-I did research various sites but I was wondering if anyone could perhaps check my answers and see if they would be a correct analysis-thank you I have two questions I'm working on for home work-could you check my answers ...

English-Please check my answers
I'd like some advice on my answers. I researched various sites, reread "Rape" but I still some help. Thank you

English
I have two questions I'm working on for home work-could you check my answers and advise me the direction I should go-if they're right or wrong??Thank you In the poem "Rape," Adrienne Rich uses the word "machine" instead "typewriter" whenev...

Physics
Suppose two thin flat plates measure 3.5m x 3.5m and are separated by 6.5mm. They are oppositely charged with +-20microCoulombs. Estimate the total force exerted by one plate on the other (ignore edge effects).

Discrete Math
Directions: Find the quotient and the remainder when the first polynomial is divided by the second. #9. 3x^4 – 2x^3 + 5x^2 + x + 1;x^2 + 2x

childhood education
How do childhood Education centres provide quality care to their caregivers.

childhood education
In what ways does the childcare centre provides quality care to their caregivers.

world history
The most important contribution the Mongols made to encouraging trade along the Silk Roads was A. building permanent inns for travelers. B. building a permanent road. C. lowering taxes for merchants. D. providing security.

Physics
18.615

Physics
18.615

Math
a(3a + 1) + (a + 1)(a-1)

childhood education
In what ways does the program provides quality care to their childhood caregivers.

french
what is le PMU of france and do you know were I can get a graph to represent it?

french
What is le PMU in france and what graph could I use to represent it? i tried looking up information but am a little confused. Is it like betting on certain games?

algebra
What is the value of x and KL if K is between J and L? JK=6x, KL=3x, and JL=27

Math
Please help me solve this... 3(x-2)(x+6) Thanks

Math
What is greater 92.784 or 92.0784

chemistry
Calculate the decrease in temperature in degree Celsius for 115g of copper that loses 2.54kJ

Chemistry
Give the physical state of CO2 under the following conditions: pressure = 4000 mmHg, temperature = 18 degrees F. show work!

Texas Government
Thank you Writeacher. And have a great morning :)

Texas Government
Hmm, I see the which means the local governments are the ones in power. So all the states have confederate systems. Got it !

Texas Government
Since EU is not a Unitary Government it is obviously Confederal since it is "Of, relating to, or involving the activities of two or more nations" Moreover Texas and State governments are Federal too since the local government and the state government work together ho...

Texas Government
Then it would be federal since the powers are distributed among the royal family and the local government?

Texas Government
Hmm thank you, what makes you think England is not a Unitary Government? Uk is a unitary government controlling 4 provinces doesn't that make England Unitary too?

Texas Government
European Union is in a debate of being a confederate system and federal system, so what should I put?

Texas Government
I know the meaning of all of this, and thank you. But could you help me out with The UN, I can not seem to figure out if it a Unitary or Confederacy Also is any of my answers wrong?

Texas Government
My answers are/were : _Federal___1..In this system, power is divided between a central government and sub-government. _Unitary___2. England __Unitary__3. The European Union __Federal__ 4. Australia __Confederal__5. In this system, the states or cub-governments are sovereign. _...

Texas Government
Please tell me which one of these is Federal , Confederal or Unitary . I have already submitted my question but I just want to be sure. ____1..In this system, power is divided between a central government and sub-government. ____2. England ____3. The European Union ____ 4. Aus...

Chemistry
Give two simple tests you would use to distinguish between sodium carbonate and zinc carbonate solids

math
Which of the following four fundamental funtions have the same tangent line at x = 0 Ans:_________________ ? y = x, y = x2, y = x3 and y = ex

Physics1
A 0.50 kg gold coin is sliding across a frictionless surface with velocity of 1.0 m/s due east when it collides with a 0.040 kg silver coin sliding at 5.0 m/s due northwest.

math
the measure of angle 1 is five less than four times the measure of angle 2. if angle 1 and angle 2 form a linear pair, what are their measures?

chemistry
It's 20 grams and 1 liter, I believe.

chemistry
20 g of sugar are dissolved in 1 L of water. Calculate the concentration of this solution.

Child care
Provide the titles, authors,publishers, and copyright dates of two picture books concerning children with disabling conditions.The books copyright dates should fall with in the past five years.

Calculus
A car starts from point P at time t=0 and travels at 45 mph. A)write an expression d(t) for the distance the car travels from p. (would it just be y=45x??) B)What is the slope of the graph? what does it have to do with the Car? D)Create a scenario in which t could have negativ...

american government
see i have as an approval from my teacher to write about but i just dont get this article any info or like related topic this is the article Health care hearing awaited By Jane Norman House Republicans pushed forward last week with a targeted repeal of the health care law, vot...

american government
so my Assignment says Search the internet, newspapers or magazines for current information on what Congress is doing. Find out all you can about what Congress is up to and how their actions will influence the American population. i was wondering does anybody have a issue of wh...

algbra
i was wondering what did i do wrong in this 10. Divide (3x – 2)(x - 4) – (x - 4)(6 – 5x) / (4 – x)(8x – 1) 10- (3x-2)(x-4)-(x-4)(6-5x)/(4-x)(8x-1) The (x-4) cancels out because the (x-4)is common in all the terms of the top and bottom [(3x-2)]-[(6-5x)]...

English
In the song: How Come, How Long By: Stevie Wonder... 1) What are the two types of abuse evident in the song? 2) Discuss the meaning of the line "she had a college degree, smart as anyone could be; there was not enough education in her world that could save the life of thi...

algebra
i was wondering if i did this right A cannon ball is shot from a cannon on top of a hill that is 73.5 meters above sea level. The cannon ball leaves the cannon with a velocity of 9.8 m/s. Write and solve a quadratic equation to determine when the cannon ball will reach sea lev...

English
In the song: How Come, How Long By: Stevie Wonder... 1) What are the two types of abuse evident in the song? 2) Discuss the meaning of the line "she had a college degree, smart as anyone could be; there was not enough education in her world that could save the life of thi...

Math please help!
Slove for slope and y- intercept 4x + 3y=8

Math
Simifly the ezpression 8d^2 + 3d + 7d^2 - 6d

English
How would I cite quotes from books like The Hunger Games and Fahrenheit 451 in MLA Format? I have quotes I have to use in a comparison paper about Fahrenheit 451 by Ray Bradbury and The Hunger Games by Suzanne Collins. But The Hunger Games is written in the point of view of on...

chemistry
C = change in the volume of the can. Everything else remains the same. Specific heat is a chemical property, not a physical one.

Geometry
OMG! I HAVE A BUNCH OF PATTERNS AND I DONT KNOW HOW TO SOLVE THEM! THINGS LIKE 61, 52, 63, 94... what the poop? help!

To Reiny
So for the second one, I multiplied each term by R aR= R- 1 but then I got stuck after that... sorry

Mathematics
1. make p the subject: p/p-3= R 2. make R the subject a= 1- 1/R

english
What are some examples of real and fantastic plot elements?

Spanish
11.) El profesor___, y el estudiante___. A-termina las clase, empieza la clase B-ensena, estudia C-ensenar mucho, estudiar D-empieza la clase, terminar 18.)___. tocas la guitarra? A- Miguel B-Juan y Carlos C- Felipe, Ana y Barbara D-Senora Carreras

calculus
Find dy/dx and d^2y/dx^2 and then determine for which t values the curve is concave up: x=t^3 - 18t y=t^2 - 1

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