# Posts by Aj

Total # Posts: 362

**Calculus**

Find the centroid of the region bounded by the curve sin x on the interval (0, pi) and the x-axis. Please help

*May 12, 2011*

**Math**

A bag contains forty coins, all of them either 2c or 5c coins. Let there be x 2c coins and y 5c coins. If the value of money in the bag is $1.55, find the number of each kind.

*May 12, 2011*

**Science**

What time of reactions is Silver + gold(III)> silver nitrate + gold

*April 20, 2011*

**us history**

list two reasons that stereotypes creted by propaganda may gave affected the deciosion to drop the atomic bomb on japan

*April 19, 2011*

**us history**

Explain why the U.S. supported a policy of the open door?

*April 18, 2011*

**Physics**

A motorboat travels at a speed of 40 km/h relative to the surface of the water. If it travels upstream against a current of 12 km/h what is the boats speed relative to the shore?

*April 15, 2011*

**Algebra**

Name the property shown by the following statement: 9x+0=9x?

*April 8, 2011*

**math**

because he wanted a potatoes chip

*April 2, 2011*

**Analytic Goemetry**

Find the equation of the parabola with axis parallel to the x-axis and passing through (3/2,1),(5,0) and (-1,2).

*March 23, 2011*

**Analytic Goemetry**

Find the equation of the parabola whose axis is horizontal, vertex on the y-axis and which passes through (2,4) and (8,-2).

*March 23, 2011*

**calculus SIMPSON RULE**

Use Simpson's Rule and all the data in the following table to estimate the value of the integral . x -16 -15 -14 -13 -12 -11 -10 y -8 9 4 9 -5 -9 3

*March 14, 2011*

**college math**

A business associate who owes you 3600 dollars offers to pay you 3360 now, or else pay you three yearly installments of 1200 each, with the first installment paid now. Assume that the interest rate will be 7 percent (compounded continuously). Find the total of 3 installments?

*March 14, 2011*

**college math**

Find the approximate (with an integral estimate) present and future values of a constant income stream of 2500 dollars per year over a period of 40 years, assume a 5 percent annual interest rate compounded continuously. Find current and future value?

*March 14, 2011*

**college math**

You won the lottery. They will pay you 1 million dollars a year for 20 years. Assuming 10 percent interest compounded continuously, approximate the present value of your winnings by assuming the money is paid to you continuously over the period of each of the 20 years and in ...

*March 14, 2011*

**math college**

A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the period of each year.

*March 14, 2011*

**math**

(a). Determine the DFS tree of K3,3. (b). Determine the BFS tree of K3,3.

*March 14, 2011*

**math**

(a). For any connected graph G, all internal nodes of the BFS tree on G have the same number of children. (b). For any connected graph G, the DFS tree on G and the BFS tree on G have the same number of edges.

*March 14, 2011*

**math**

Problem A: Let T be a balanced 5-ary tree with 81 nodes. (a). How many internal nodes does T have? (b). How many edges does the tree T have? (c). What is the height of T?

*March 14, 2011*

**math**

A bank account earns 10 percent interest compounded continously. What annual amount of money must parents deposit each year in order to save 110000 dollars in 9 years for a child's college expenses? Assume the annual amount is added continuously over the period of each year.

*March 14, 2011*

**Physical science**

(A) A red light source and a green light source shine on a white screen. What color will the screen be? Explain your answer (B) if a blue object is aced in front of the screen, what color will it be? Explain your answer

*March 14, 2011*

**Physical science**

Two hunting forks are struck at the same time. One tuning fork has a frequency of 20 Hz while the second fork has a frequency of 226 Hz. How many beats will result?

*March 14, 2011*

**Physical science**

A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6 m/s in 2 seconds. How much did the hockey puck accelerate? How much force was exerted on the puck? How much force did the puck exert on the hockey stick?

*March 14, 2011*

**physics**

Determine the resulting temperature when 150g of ice at 0°C is mixed with 300g of water at 50°C

*March 9, 2011*

**physics**

How much heat is absorbed by an electric refrigerator in charging 2 Kg of water at 15°C to ice at 0°C?

*March 9, 2011*

**Math**

you put y on one side so its x=3-y then substitute that into the bottom equation. so you get 3(3-y)+2y=2 which is 9-3y+2y=2 then just solve for y. y=7

*March 3, 2011*

**Semicolon**

Marielle, the coordinator, was eager to begin the speeches, awards presentation, and banquet, but the guest speaker, who was flying to Chicago, had not arrived. Do I need a semicolon in this sentence?

*February 14, 2011*

**statistics**

115,200

*February 3, 2011*

**chemistry**

If you were given an unknown solution, write the steps that would be needed to prove that a solution contained phosphate.

*January 5, 2011*

**chemistry**

I am so confused GIVE ME THE ANSWER

*December 14, 2010*

**Scince**

How do you think you could increase the purity of the nitrogen gas?

*December 8, 2010*

**physics**

A projectile was fired at 35 degrees above the horizontal. At the highest point in its trajectory its speed was 200 m/s. If air resistance is ignored, the initial velocity had a horizontal component of 0. How is this possible? Someone explain it for me please. ty

*November 30, 2010*

**Math 5th grade**

how is the number of zeros in the quotient of 420 divided 7 = 60 related to the number of zeros in the dividend

*November 30, 2010*

**chemistry**

the solubility of Ag3PO4 (in water) is 6.7 x 10^-3 g/L. what is the molar solubility>

*November 29, 2010*

**maths**

how many tickets did i buy if i spent £30 formula is C=20+0.1t

*November 22, 2010*

**english**

Make a noun by adding a suffix to the word priest. write a sentence.

*November 14, 2010*

**math**

answer is a $35.70

*November 11, 2010*

**math**

what is the greatest number of times you would regroup when multiplying two 2-digit factors?

*November 9, 2010*

**5th grade**

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD ...

*November 7, 2010*

**Physics**

An aircraft on its take-off run has a uniform acceleration of 3m/s^2.What velocity does the aircraft gain in 4s?

*October 29, 2010*

**social studies**

go to google and paste this Lower Canada - The Canadian Encyclopedia

*October 24, 2010*

**english!!**

jennifer wanted to travel Abroad to foreign land. & stop Brooding! moping and worrying like that won't help.

*October 24, 2010*

**english!!**

circle the context clue that shows the menaing of the word in italic type, then write a synonym for the meaning you infer on the lines provided. ¡ö jennifer wanted to travel abroad to a foreign land._____________________ ¡ö Stop brooding! Moping and ...

*October 24, 2010*

**math**

what is 22/33 in simplest form or is it just that?

*October 19, 2010*

**Math**

A man and his wife share a sum of money in the ratio 3:2. If the sum of money is doubled, in what ratio should they divide it so that the man still rceives the same amount?

*October 17, 2010*

**High School**

Please provide me some links to websites where I can buy and download US High School text books. I am now in a UK based school in Asia but I will be moving to America next year. So please provide useful links.

*October 14, 2010*

**Math**

(a) In 2000 a club has 40 members who each pay $120 annual subscription. What is the total income from subscriptions? (b) In 2001 the subscription is increased by 35% abd the membership increases to 65. (i) What is the original subscription? (ii) What is the total income from ...

*September 27, 2010*

**Science-Physics HELP**

A S.S. automobile travels N at 40 km/h and a P.A. automobile travels E at 50 km/h. Relative to the observer riding in the S.S. auto what are the x and y components of the velocity of the P.A. car? The x axis is to the E and the y axis is to the N.

*September 13, 2010*

**College Algebra**

two trains leave a train station at the same time. One travels east at 10 miles per hour, the other travels west at 9 miles per hour. In how many hours will the two trains be 45.6 miles apart?

*August 31, 2010*

**Math (easy question)**

Thank you so much! but are you sure for part c.?

*July 23, 2010*

**Math (easy question)**

Given the function f(x) = 1/(sqrt x) a. Does f(x) exist at x=0? b. Does f'(x) exist at x=0? c. Explain why integral (from 0->1) f(x)dx does exist. THANK YOU.

*July 23, 2010*

**chemistry**

give 30 example of solute

*July 20, 2010*

**chem**

give 30 example of solute

*July 20, 2010*

**math**

Well if 1/5th of the girls and 1/8th of the boys when we put this as a whole fraction, we get 13/40th of the grade went to the camp. We do this by making both fractions have a common demoninator (bottom) then simply adding them to find fraction of boys and girls(all of the ...

*June 8, 2010*

**home economics**

what are the different brands of packaged soups?

*June 6, 2010*

**Algebra**

9x + 2 = 13 divided by 5

*May 20, 2010*

**Physics**

The type of watch is not specified in the question from my textbook but I think its traditional, self winding, mechanical dial

*March 16, 2010*

**Physics**

I think electrical changes to kinetic energy.

*March 16, 2010*

**Physics**

If you are wearing a watch, what energy changes are taking place in it right now?

*March 16, 2010*

**science**

do a quad genitic cross :-(

*February 21, 2010*

**Science**

What happens to an overhead power cable suspended from pylons in a)winter b)summer Explain your answer.

*February 18, 2010*

**chemistry**

nf=2 don't listen to the other bs

*January 15, 2010*

**geo**

what are the human activities in the innuitian mountains?

*January 9, 2010*

**language arts**

According to the author, _____.

*December 17, 2009*

**8th grade**

-5+(5)

*October 20, 2009*

**science**

explain how gravitational pull of the sun and inertia keep the earth in orbit around the sun?

*October 6, 2009*

**Chemistry**

Ok this is for a lab we are doing for equilibrium and absorbance and concentration, so i don't know if anyone can answer this. Question: Describe how you plan to determine the temperature dependence of K sub c. Use a step by step process.

*September 23, 2009*

**Accounting**

Explain the accounting purpose of each general ledger cycle

*September 14, 2009*

**Algebra**

Some inequalites will have no answer. You just have to show your work and put "No answer" :)

*September 10, 2009*

**Math**

Basically, when could you use what you learn in class in real life? (Like a bridge builder would use angles to be able to support the bridge) Like how could someone use this information in real life?

*September 10, 2009*

**Math**

How would you solve (a-2)/(a+3)=3/5 for a?

*September 7, 2009*

**Math**

Why thank you Mr. bobpursley! 8D

*September 7, 2009*

**Math**

How do you solve (1/x)=c+(1/b) for x?

*September 7, 2009*

**MATH**

FACTOR THE EXPRESSION COMPLETELY 9x^3 + 36x^2 - x - 4

*September 3, 2009*

**Math**

216

*August 31, 2009*

**Chemistry**

When salt is spread on snow covered roads at -2 deg C, the snow melts. When the same amount of salt is spread on snow covered roads at -30 deg C, nothing happens. Explain.

*August 30, 2009*

**Chemistry**

i got an i of 1.83 then i divided it by 2 to get a dissociation of 91.5% is this correct?

*August 30, 2009*

**Chemistry**

yeah -.34 is the change in temp freezing

*August 30, 2009*

**Chemistry**

The freezing point depression of a 0.100 molality solution of NaCl(aq) solution is 0.34 deg C. Calculate the % dissociation of NaCl(aq) (Kf for water = 1.86 deg Cm^-1)

*August 30, 2009*

**Economics**

Which of the following contains only positive statements, rather than normative statements? A. The unemployment rate is high mainly because companies are hiring immigrants to fill positions that would have been offered to natives. Companies should hire more native workers. B. ...

*August 15, 2009*

**12 grade economics**

describe four advantages of using price as an allocating mechanism?

*July 14, 2009*

**economics**

distinguish between the individual supply curve and the market supply curve

*July 13, 2009*

**economics**

describe the difference between the income effect and the substitution effect

*July 13, 2009*

**economics**

explain how the principle of diminishing marginal utility is related to the downward sloping demand curve?

*July 13, 2009*

**5th grade**

if a team is divided into 5 groups 1/2 , 1/6 , 1/6 , 1/12 , and 2 other people how many all together how many in each group

*May 7, 2009*

**chemistry**

How do you balance this redox rxn? Al + HNO3 ----> Al(NO3)3 + NH4NO3 +H2O

*April 22, 2009*

**8th grade history**

thanks a lot!!!

*February 26, 2009*

**8th grade history**

i need to do a 3 page paper on joan of arc's trial, but i don't know what information to put. can you please help me make a summary???

*February 26, 2009*

**math**

what is the geometric name for a figure with four sides

*December 3, 2008*

**Pre-Algebra**

Simpliby an expression (3(4))2

*November 5, 2008*

**Chemistry**

I need help with these two problems: 1.The H-Cl bond has a frequency of vibration of 8.662 multiplied by 10^13 Hz. What wavelength (in µm) corresponds to that frequency? -is the answer just (3.00x10^8 m*s)/(8.662x10^13 s^-1) 2.A flame has a characteristic color due to ...

*November 4, 2008*

**Chemistry**

I had to find the absolute zero from a graph with the following points: Temperature (K) / Volume (mL): 318 4.5 308 4.3 303 4.1 294 4.0 284 3.9 275 3.7 271 3.2 I graphed the points (with the temperature on the y-axis because the lab indicated a vertical temperature axis) and ...

*October 30, 2008*

**Math**

because the amount of desks are 4

*October 14, 2008*

**math**

what is missing

*October 14, 2008*

**math**

what two numbers equal 264 and 364?

*October 14, 2008*

**english**

I am doing a crossword puzzle the question i asked has 10 spaces

*October 8, 2008*

**english**

the sum of many parts that starts with a c and eands with an o and has an L in the middle

*October 8, 2008*

**english**

what is the answer to consisting of seprate interconnetced parts

*October 8, 2008*

**english**

what is the answer to consisting of seprate interconnectedparts?

*October 8, 2008*

**english**

the answer

*October 8, 2008*