Science & Mathematics - 12 August 2007

are the UV rays that help the skin to produce the vitamin D? why do we have to avoid them ?

2007-08-12 06:24:28 · 4 answers · asked by Pimpinella 2 in Biology

1. Find the measures of the other three angles of a parallelogram of one angle measures:
b. 68

thank you! can you show me the work plz

2007-08-12 06:24:28 · 4 answers · asked by Anonymous in Mathematics

2007-08-12 06:14:33 · 5 answers · asked by joko b 1 in Agriculture

This is a test for the genius.

2007-08-12 06:12:36 · 8 answers · asked by Rokkky 2 in Mathematics

2007-08-12 06:12:25 · 1 answers · asked by Calchas 3 in Other - Science

I have a summer Algebra packet for Algebra II
and I need help with the polynomials.
Please help??

1. (3x^2 - 4x + 6) + (2x^2 - x + 9)
2. (7m^2 + 5m - 9) - (3m^2 - 6)
3. 4a(3a^2 + b)
4. (3x + 5)(2x-4)
5. (b-5)(b+5)
6. (1/2x^2 + 1/4- 2/3) + (3/4x^2 - 1/2x + 3)
7. (2x + 3)(x^2 - 3x + 4)
8. (3x - 2y)^2

If you can answer just one or two of those I would GREATLY appreciate it.
I have 5 chapters of math due tomorrow for my Algebra II honors class!
This is my pain issue with the packet.
Plleeeaassse Help!
If you could just walk me through one of the problems I would be so grateful!

2007-08-12 06:09:06 · 6 answers · asked by upsetness 2 in Mathematics

2007-08-12 06:01:40 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2007-08-12 05:57:40 · 8 answers · asked by ali k 1 in Mathematics

2007-08-12 05:56:42 · 5 answers · asked by Anonymous in Biology

i live by the mountains where i think there's enough darkness at night..

thanks

2007-08-12 05:56:14 · 3 answers · asked by ohmar r 1 in Astronomy & Space

2007-08-12 05:55:52 · 9 answers · asked by Chloe 3 in Mathematics

at least 2 pages.please

2007-08-12 05:55:46 · 3 answers · asked by zen 1 in Geography

Also, who(how) put the cameras on the moon to tape Armstrong land on the moon?

Is the flag still on the moon? DId the US leave it there when they left the moon for the sixth time?

2007-08-12 05:49:04 · 8 answers · asked by Anonymous in Astronomy & Space

A man planned a 1- mile hike on a trail testing footwear. he hiked once barefoot and rated it as the maximum soreness level. he tested the different types of shoes and rated it compared to being barefoot

was the barefoot hike a control or variable? Why?

2007-08-12 05:48:57 · 2 answers · asked by Anonymous in Other - Science

these days its possible to do anything especially with all the info on the net. I reckon i could save up, buy the parts and get the help to build a deep space probe.

Im planning on going out into deep space - probably never even coming back - but i will have the technology to return if i want.
What i want to know is are there any laws which would stop me from doing this on my own private land in the UK? Also, once i get my ship built, are there any rules i got to stick to to legally guide it into orbit? eg i would need to know about air traffic and stuff like that.

2007-08-12 05:47:52 · 20 answers · asked by Anonymous in Astronomy & Space

suppose that the function p=13+45 Ln x represents the % of spam email in the U.S. where x is the number of years after 2000

Carry all calculations to six decimals on each intermediate step when necessary.

a) Use this model to approximate the percentage of spam in the year 2003

thank you

2007-08-12 05:44:25 · 3 answers · asked by quepid622 1 in Mathematics

find the domain of the following:

f (t)=4.5e^t


g (x)=log(x+3)


g(x)=2^x


g (t)=ln (t-1)

thank you

2007-08-12 05:40:24 · 3 answers · asked by quepid622 1 in Mathematics

2007-08-12 05:39:35 · 7 answers · asked by admarsd 1 in Geography

2007-08-12 05:39:27 · 6 answers · asked by jrels2 2 in Other - Science

2007-08-12 05:36:41 · 6 answers · asked by Dimpho T. L. M 1 in Chemistry

a. hexyne
b. hexene
c. methylbenzene (toluene)
d. ethanol
e. candle wax.

2007-08-12 05:36:24 · 8 answers · asked by sikhism4life88 1 in Chemistry

2007-08-12 05:31:56 · 26 answers · asked by Anonymous in Mathematics

Consider that Edwin Hubble who observed and measured that every galaxy was effectively moving away from each other and that the farther the object the faster the movement. He deduced from these observations and calculated the universe must be expanding. Then he extrapolated backwards and theorized the universe must have experienced a Big-Bang about 15billion years ago. So the universe is about 15 billion years old. (Creationists, please refrain from commenting.)

Consider that Albert Einstein theorized the speed of light is constant and space-time was dependant upon the other. (It's been proven experimentally.)

That 10-day old exposure photogragh was estimated/calculated those galaxies are as they appeared 13billion years ago. In other words, when the universe was only 2 billion years old. Remember, when we look at the Sun, its appearance is what it was 8 minutes ago.

So 13 billion years ago, the universe was much smaller than it is today. Thirteen billion years ago, the point in space we are located today would be much closer to those galaxies in that photo.

So the question is, why did it take light from these galaxies 13 billion years to reach us when they were only 2 billion years away?

2007-08-12 05:27:39 · 14 answers · asked by daffyd 1 in Astronomy & Space

2007-08-12 05:20:07 · 3 answers · asked by lykan_2006 1 in Astronomy & Space

2007-08-12 05:18:15 · 2 answers · asked by Saint F 1 in Astronomy & Space

2007-08-12 05:17:51 · 10 answers · asked by Katrina 1 in Earth Sciences & Geology

Say you take the point of origin as 0,0. And you find a point on the graph to be at 7, 2.

How do I determine what angle this is?

Would I use sin y/cos x?
which would be sin 2/cos 7

2007-08-12 05:14:18 · 4 answers · asked by Anonymous in Mathematics

I hav a budget of up to around £450, and i am looking for a telescope for the best clearest views of planets but also view of glaxies would be good. any suggestions??

2007-08-12 05:10:05 · 4 answers · asked by Anonymous in Astronomy & Space

and if so what time will i be able to see it

2007-08-12 05:08:44 · 4 answers · asked by rootbeerkid89 2 in Astronomy & Space

2007-08-12 05:02:52 · 2 answers · asked by bhupesh m 1 in Engineering