Science & Mathematics - 1 July 2007

A_n = 2^n / 3^(n+1).

I'm not sure how to find the limit.

2007-07-01 19:27:07 · 3 answers · asked by Anonymous in Mathematics

2007-07-01 19:12:45 · 5 answers · asked by Anonymous in Engineering

3x-2y=6
5x +3y= -9



factor than solve the following equations:
4x^2 +4x+1=0





x^2-8x+16=0

2007-07-01 19:08:26 · 5 answers · asked by callmejeseca 1 in Mathematics

Sue has a balance of $35 in her checking account. She writes one check for $10, and three checks for $9 each. What is her balance now?

A. $18
B. -$2

C. $54

D. -$11
b?

2007-07-01 19:04:35 · 5 answers · asked by wolf_in_da_room 1 in Mathematics

a) when the concentration of the carbonate is 1.0E-06M
b) or when its 100times greater (1.0E-04 M
the equilibrium process is NiCO3(s)= Ni (aq) +CO3(aq) ksp=6.6E-9

2007-07-01 18:59:20 · 1 answers · asked by its me 1 in Chemistry

2007-07-01 18:57:19 · 3 answers · asked by Anonymous in Earth Sciences & Geology

one number is eight less than another. the product of the two numbers is 345. what are the two numbers?

Show steps please. Ty!

2007-07-01 18:50:32 · 9 answers · asked by I'm B O R E D 2 in Mathematics

pounds =60 kilograms

2007-07-01 18:47:52 · 16 answers · asked by overcomerconquerer 1 in Mathematics

i don't understand what to do if a formula has the word floor in it. What do I put there?

2007-07-01 18:46:27 · 5 answers · asked by tyder21 4 in Mathematics

2007-07-01 18:43:21 · 4 answers · asked by Sonu 2 in Biology

thanks

2007-07-01 18:39:03 · 2 answers · asked by rockabilly.betty 2 in Mathematics

Wouldn't this mean it has infinite mass and charge densities? Wouldn't that make every electron a singularity?
I know I must be mistaken, so can anyone clear this up?

2007-07-01 18:33:03 · 2 answers · asked by Anonymous in Physics

A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y=2–x^2 . What are the dimensions of such a rectangle with the greatest possible area?

How do I approach this?

2007-07-01 18:30:57 · 4 answers · asked by Anonymous in Mathematics

what is the mass of a gas that has 48.9liters a pressure of 724torr 25 degrees C and molecular weight of 345g/ mole?

2007-07-01 18:27:19 · 2 answers · asked by Tommy D 1 in Chemistry

Solve this problem for A and B. show steps.

2007-07-01 18:24:37 · 4 answers · asked by Stirling 2 in Mathematics

i've heard that in practically every surgery, the anesthesiologist's role is absolutely crucial and as important as that of the surgeon. why are they so important?

is a breathing tube ALWAYS put down your throat? i heard that no, it is not always done. why not?

2007-07-01 18:17:27 · 12 answers · asked by Louiegirl_Chicago 5 in Medicine

Are Eggshells composed of approximately 95 per cent liquid or Carbon Dioxide?

2007-07-01 18:10:42 · 2 answers · asked by Anonymous in Botany

I'm 14 years old and just curious about my height.

2007-07-01 18:09:39 · 12 answers · asked by Captain Charisma fan 2 in Engineering

2007-07-01 18:07:03 · 7 answers · asked by Anonymous in Mathematics

Solve for the unknown: 8/52 = m/39.. I just need it explained, i will do the work. Thank you

2007-07-01 18:05:11 · 6 answers · asked by Anonymous in Mathematics

Please only answer this question if you truly have learned the pathology behind diseases such as heart attacks, cancer, strokes, etc. If you're not familiar with the cell cycle, oncogenes, DNA repair, etc then don't try to answer this question. I'm not looking for a religious fanatic to quote the bible. I'm looking for someone with medical knowledge to explain how it's still possible to believe in religion and god given their underlying understanding of the mechanisms behind disease.

2007-07-01 18:05:02 · 18 answers · asked by Scott S 2 in Medicine

A cylinder is inscribed in a right circular cone of height 8 and radius (at the base) equal to 4 . What are the dimensions of such a cylinder which has maximum volume? What is the height and radius:

Here is what I have:

plotting the cone on a graph gives me points:
(0,8) - tip of cone
(4,0) - radius of cone

from this, i figure out the formula of the line that is tangent to the point that the tip of the side of cylinder touches:

y= mx + b = -2x+8

The formula for the volume of a cylinder is V=pir^2h

the formula for the line can be changed in terms of r anfd h (radius and height respectively) to be:

h = -2r+8

Plugging this into the eqn: V=pi*r^2*(-2r+8)

But then... I get stuck - if i differentiate, I still have two variables dV/dx and r.

Is the process wrong? Have I skipped something?

2007-07-01 17:50:41 · 5 answers · asked by Anonymous in Mathematics

2007-07-01 17:46:55 · 4 answers · asked by natasha 1 in Zoology

Why does anyone exist? Why does time exist? Where did space come from? If you believe it was from God, well then where did he come from? Was he created? Who created him? Who created what created him? If he has always existed, he had to start at one point or another with or without the measurement of time or anything else. Are there any theories to these questions or do we simply have no idea? Thinking about this I think I've reached the logical limit of my brain :-/ I mean, even then you start questioning what existence means. Is there something beyond it or another form? Different dimensions??? Well who created the dimensions? Where did it originate? It makes the question, "What came first, the chicken or the egg?" seem crude..... I think I'm going to go take a Tylenol.

2007-07-01 17:46:26 · 6 answers · asked by Sandfrog 3 in Physics

Please coul you explain the way you get the ansa, I asked this before but had very different ansa's like 9kg, 12kg, 8kg so I dont know who is correct.

Thank you very much guys!

2007-07-01 17:43:03 · 4 answers · asked by Anonymous in Mathematics

2007-07-01 17:41:08 · 13 answers · asked by Anonymous in Mathematics

same as tan[sin^-1 (x)]

how do you simplify that? Im working on trig substitution and trying to simplify it but I dont know how. My calculator gives me the answer but I dont understand how it gets it

2007-07-01 17:39:37 · 6 answers · asked by nkarasch 2 in Mathematics

A cube is made from cardboard 12cmx18cm what is area of 1 face of the cube?

Thanks guys. Could you put formula too?

2007-07-01 17:34:58 · 9 answers · asked by Anonymous in Mathematics

http://en.wikipedia.org/wiki/Image:AbaloneInside.jpg

2007-07-01 17:34:25 · 2 answers · asked by specialone18 5 in Other - Science

2007-07-01 17:33:07 · 3 answers · asked by ? 3 in Zoology