Science & Mathematics - 19 July 2007

Use the Principle of Mathematical Induction to prove that
1 - 2 + 2^2 - 2^3 +...+ (-1)^x * 2^x = [2^(x+1)*(-1)^x + 1] / 3
for all positive integers n

2007-07-19 09:41:05 · 2 answers · asked by Anonymous in Mathematics

2007-07-19 09:38:27 · 6 answers · asked by Tracy T 1 in Mathematics

Which human weapons would work in space, or on planets like Mars?

2007-07-19 09:29:59 · 6 answers · asked by Anonymous in Astronomy & Space

for algebra one, i suck at math... heres what im talking about (x-y)(6x+4y)
anyone?

2007-07-19 09:29:43 · 7 answers · asked by jess 1 in Mathematics

2007-07-19 09:28:48 · 6 answers · asked by deannahndrsn 2 in Mathematics

Let X e a random variable with mean mu=100 and standard deviation sigma=10. Determine the proportion of values of X that fall within the following intervals.
a) (90, 110)
Please explain your answer so I can learn this material...thanks

2007-07-19 09:26:02 · 3 answers · asked by C K 3 in Mathematics

..... or is it fabulated stories. And if that's the case what is it for? To get aggressive with a man when the lights are turned down? Honey please! I need explanations.

2007-07-19 09:25:59 · 12 answers · asked by Mrs. Midnightbully 4 in Biology

We are all part of one whole human race. The care takers of the world and each other. I see that ignorance, selfishness and greed is what is distroying the unity and balance of all. So, what can you do NOW (today) to make a differance for the highest good of all ?

2007-07-19 09:24:31 · 7 answers · asked by Anonymous in Other - Science

For example

5x-2/x^2+1

2007-07-19 09:19:32 · 5 answers · asked by finding.4ever 1 in Mathematics

i think its 90% but im not sure, can someone help please, thanks :)

2007-07-19 09:14:39 · 7 answers · asked by gigopicon 1 in Mathematics

how do i work out percentages on a calculator. if 40 out of 53 people agree with something what percentage is that.

2007-07-19 09:10:10 · 16 answers · asked by danny c 2 in Mathematics

thank you

2007-07-19 09:09:18 · 6 answers · asked by Anonymous in Mathematics

Im going to make a real life Transformer, and Metal Rubber is the perfect material for this project.

2007-07-19 09:08:29 · 5 answers · asked by Tyler C 2 in Engineering

a club with 20 women and 17 men needs to form a committee of size six. How many committees are possible if the committee must have three women and three men?

2007-07-19 09:08:10 · 3 answers · asked by Anonymous in Mathematics

Cell 'A' has 46 chromosomes. It undergoes meiosis I to produce cells C and D which later undergo meiosis II giving rise to cells Z X C V. How many chromosomes would be present in each of the cells C and Z.

2007-07-19 09:06:21 · 3 answers · asked by Anonymous in Biology

Yep, i'm back again.

As pathetic as it may sound I am unable to factorise this equation. This mean put it into 2 bracets as in (x+1)(x-5).

Please help.

2007-07-19 09:05:42 · 10 answers · asked by Anonymous in Mathematics

2007-07-19 09:01:32 · 5 answers · asked by Sarah smith 2 in Chemistry

your help is appreciated. thank you

2007-07-19 08:58:04 · 3 answers · asked by Anonymous in Mathematics

if the answer is 1/2e^2x + x ; could u explain why it is not e^2x + x instead of the previous since the integral of e^2x is e^2x not 1/2e^2x.

2007-07-19 08:57:29 · 3 answers · asked by Anonymous in Mathematics

2007-07-19 08:56:12 · 4 answers · asked by Anonymous in Mathematics

compounds. I really need help on this one!! The only thing I can find is how organic compuands have Carbon, but most inorganic don't. Thats it! Anybody have anything that they have IN COMMON?!?!?

2007-07-19 08:54:06 · 5 answers · asked by Jordan 4 in Biology

or other ways to get rid of troposferic ozone (something to bind on it and make it less poisonous to lungs liver and plants)

2007-07-19 08:49:01 · 1 answers · asked by borut_veselko 1 in Chemistry

I want to get one and I want to keep it in the corner. If Im setting myself up for wacky disasters. Please stop me with your plant knowledge

2007-07-19 08:45:51 · 10 answers · asked by maguathehearteater 1 in Botany

Other that these two:

Hot Coals / Heat
$#!^ / Stink

2007-07-19 08:43:50 · 3 answers · asked by Anonymous in Physics

please help me solve this. please explain. thank you very much for your help.

2007-07-19 08:42:47 · 2 answers · asked by Anonymous in Mathematics

d^2y/dx^2+dy/dx+ax/b=0

2007-07-19 08:41:17 · 4 answers · asked by ( -_- ) 1 in Mathematics

I was recently given a large pjece of jade, about 300g block with a silver Kiwi on top. HOw much would the resale value be (i've checked and its ok to sell, it was given to me as an aid for university funds)

2007-07-19 08:39:28 · 0 answers · asked by benwfranklin 1 in Earth Sciences & Geology

2007-07-19 08:35:12 · 8 answers · asked by Nicole 1 in Earth Sciences & Geology

2007-07-19 08:32:43 · 9 answers · asked by charles w 1 in Mathematics

I am told that space is a near vacuum so, why isn't the atmosphere just sucked out into nothingness? Please don't tell me it's gravity because I know that if you induce a vaccuum here on earth and then expose it to the air, air will rush to fill the void. Therefore, it would seem that gravity has no affect.

2007-07-19 08:32:36 · 18 answers · asked by Napoleon B 2 in Astronomy & Space