Science & Mathematics - 7 September 2007

2007-09-07 10:22:48 · 5 answers · asked by 59caddy 2 in Zoology

15= 3 (7y - 2)

5/8x - 1/2 = 3/4


help please..

2007-09-07 10:21:58 · 7 answers · asked by rose v 2 in Mathematics

Help, please.

2007-09-07 10:21:38 · 4 answers · asked by Anonymous in Mathematics

will be $5 every day payable each morning. Then he gave the boy his first $5 bill.

Billy (who was broke before that) immediately decided that tonight he will buy ice cream to his girlfriend and himself (2 x $1.25 = $2.50), and continue to do so every day, until he has $15 to take her to the movies (2 x $7.50) instead.

On what day will they go to the movies?

2007-09-07 10:20:24 · 7 answers · asked by Alexander 6 in Mathematics

what do wasp's actually do apart from sting you?

2007-09-07 10:18:02 · 19 answers · asked by mizzmamma 5 in Zoology

2007-09-07 10:13:12 · 6 answers · asked by Marvin 4 in Mathematics

1.half of a sphere is called a _______________________.
2.____________ is the distance north or south of the equator.

thank you so much :)

2007-09-07 10:11:44 · 8 answers · asked by pinkygirl m 3 in Geography

If natural selection, mutations, polyploidy, and gene replication/duplication do not add new functional genetic information to DNA (they only delete, scramble, and copy existing information), then how exactly do you account for the astronomical increases in information required to arrive at human DNA with over 3 billion base pairs? And when I say that they copy information, this is subsequent to photocopying a page out of a book; no new information is added. Also, assuming you present a mechanism (which we do not currently observe), how would evolution accomplish this even within 3 billion years, unless it added at LEAST 1 necessary, coherent, and functional piece of information to this DNA every year? Finally, this does not even account for the proteins necessary to carry out instructions for the genome, the role that they play in eukaryote cells, the process of meiosis necessary for sexual reproduction, or the replication of 100 trillion cells necessary to produce a human.

2007-09-07 10:07:46 · 11 answers · asked by Anonymous in Biology

2007-09-07 10:05:58 · 4 answers · asked by NANAZE 1 in Geography

2007-09-07 10:05:55 · 6 answers · asked by fordmommywife 2 in Zoology

2007-09-07 10:05:47 · 5 answers · asked by brainless 2 in Mathematics

2007-09-07 10:05:04 · 4 answers · asked by brainless 2 in Mathematics

2007-09-07 10:03:06 · 6 answers · asked by brainless 2 in Mathematics

2007-09-07 10:02:24 · 1 answers · asked by Mostafa S 1 in Engineering

Prove that a polynomial of degree <= 2 under addition is an isomorphism with vector addition in R3:

I don't want the answer, but hints to help me would be GREATLY appreciated. Thanks

2007-09-07 10:00:29 · 3 answers · asked by Galbadian 2 in Mathematics

I recently was in California on vacation and noticed all of those oil derricks at Huntington Beach. Is the Californian coast rich in oil?

2007-09-07 09:57:56 · 2 answers · asked by mrmick001 1 in Earth Sciences & Geology

2007-09-07 09:57:08 · 7 answers · asked by fireball_adventurer_beachgoer 1 in Zoology

How do you divide monomials by monomials
with exponents?


e.g>>

2a^4b^3÷a^2b


-4w^3x^5 ÷ (-2w^2x^2)


-9f^3g^5h^2 ÷ 6fg^2h

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oh and multiplying monomials by monomials?

is the answer to this rite ?
(2yz)(-3y^3)
= -6y^4z
if its not rite can you explain what i did wrong?

2007-09-07 09:56:17 · 1 answers · asked by Anonymous in Mathematics

what creates the blue vision, why is it not another colour.

2007-09-07 09:53:01 · 12 answers · asked by jerbal 1 in Astronomy & Space

Can anyone pleeze give me all the square roots from 1 to at least 1000??? or give me a link to go to???
it would rele help me a lot?

2007-09-07 09:52:08 · 2 answers · asked by Anonymous in Mathematics

I have always wanted to go into engineering but my undergraduate is in an unrelated field. Has anyone ever started their engineering career at the Master's degree level? Or is it necessary to obtain an undergraduate degree?

2007-09-07 09:51:48 · 3 answers · asked by Anonymous in Engineering

2007-09-07 09:51:31 · 5 answers · asked by iluvwomen6964 2 in Chemistry

How do you know if a quadratic equation will have one, two, or
no solutions?
How do you find a quadratic equation if you are only given the solution?
Is it possible to have different quadratic equations with the same solution?

2007-09-07 09:50:53 · 4 answers · asked by Anonymous in Mathematics

plz help!!

2007-09-07 09:49:12 · 1 answers · asked by shima 1 in Chemistry

does probability really work out in real life? of course, in a lottery or rolling dice, if you havent rolled a 6, just because your rolled a 1,2,3,4, and 5 on the last 5 tries doesnt make it any more likely to get a 6 on the 6th try since its random supposedly. so how can we really apply this to actual life scenarios,

for instance the probability of the next terrorist attack. now we have a good idea that one is inevitable, but of course that could be wrong, we might never experience another for the rest of our lives, then again thats not really a good bet... but we havent really seen anything since 9/11/01, so with every passing day doesnt the likelihood of a new terrorist attack become more likely? is this even applicable to probability considering the differnt factors at work (ie terrorist fundraising, planning, training, foiled plans by the authorities) that take time and would explain why we havent been unfortunate enough to witness another attack? can someone explain?

2007-09-07 09:48:35 · 11 answers · asked by ? 2 in Mathematics

2007-09-07 09:47:38 · 9 answers · asked by Anonymous in Mathematics

why are there no earthquakes deeper than 670 kilometers?

2007-09-07 09:47:13 · 6 answers · asked by Macgyver with Crosby 4 in Earth Sciences & Geology

I've always wanted to know this. Everybody I've asked (and they're all smart) says math is such an important part in this, but I've rarely found anything having to do with math in this.

Plus, I'm already looking into my career path, and this has been given to me as a possibility. I'm a very good math and science student. And I like roller coasters. So yeah.

2007-09-07 09:43:53 · 9 answers · asked by Anonymous in Engineering

The standard enthalpy of vaporization (DeltaH°vap) of n-pentane (CH3(CH2)3CH3) is 27.6 kJ/mol.
The normal boiling point of n-pentane is 36.1°C.
Calculate the vapour pressure of n-pentane at 13.1°C.

And please explain how to solve?

2007-09-07 09:42:52 · 1 answers · asked by Anonymous in Chemistry

2007-09-07 09:41:18 · 17 answers · asked by Anonymous in Other - Alternative