Science & Mathematics - 1 November 2007

lcm for 36 and 42

2007-11-01 14:16:09 · 14 answers · asked by Anonymous in Mathematics

f(x)=2 ln [cosx]

what is f''(x)=?

2007-11-01 14:15:34 · 3 answers · asked by Anonymous in Mathematics

2007-11-01 14:15:28 · 6 answers · asked by Anti theist 5 in Weather

what is the planetesimal theory of lunar formation

2007-11-01 14:14:19 · 3 answers · asked by Nat 1 in Astronomy & Space

if the earth is 24 thousand miles round and there is 24 hours in a day then the earth must be spinning at 1.ooo mph nearly twice the sound barrier so why dont we hear this

2007-11-01 14:13:19 · 5 answers · asked by Anonymous in Astronomy & Space

http://i111.photobucket.com/albums/n157/wiltzandrew/GOOD7.jpg
All of the important information is already given. The image is drawn perfectly to scale. Here are the questions:

"1) What are the coordinates of the yellow dots?
2) What is the length of the yellow line?
3)What is the area of the polygon?
4) What are the interior angles of the two yellow dots?

*Show your work; numbers must be accurate to the 4th decimal place*"

I made this up in Chemistry two days ago when the teacher was rambling on about saturated and unsaturated solutions. Just to find the distance between the yellow dots, it took me about 2 hours because I forgot a few of my trig rules; did that stuff last year; eesh. Took my math teacher about a half hour to find the distance between the two yellow dots. I felt like spicing it up, and adding a few more questions. IM me if the questions are unclear. Good luck!
-Andrew
wiltzandrew1989 on Yahoo! Messenger,
wiltzandrew on AIM,
wiltzandrew on MyspaceIM

2007-11-01 14:13:11 · 2 answers · asked by College guy 2 in Mathematics

and could you please tell me how you go the answer too? I'm still so confused on how to factor =(

2007-11-01 14:12:17 · 3 answers · asked by Christina : 2 in Mathematics

it has no tail but is just visible with the naked eye,through a cheap spotter scope it is huge!. obviously the sun at this time is in the southern hemispere so that would explain the lack of tail but would like to know if this object is "known" and if it is what name does it go by? thanks!

2007-11-01 14:10:55 · 15 answers · asked by george m (eat that bun in one ) 2 in Astronomy & Space

A 0.35 M solution of a weak acid is 2.0% dissociated.

(a) Calculate the [H3O+], pH, [OH -], and pOH of the solution.
[H3O+]
_____
pH
_____
[OH -]
_____
pOH
_____
(b) Calculate Ka of the acid.
_____

2007-11-01 14:05:30 · 1 answers · asked by Anonymous in Chemistry

administerd with WATER or better administerd with FOOD

2007-11-01 14:04:17 · 12 answers · asked by S i r i 1 in Medicine

Im doing a rport and need to no who created table salt

2007-11-01 14:04:09 · 4 answers · asked by Broken_Hearted_Angel! 1 in Physics

?

2007-11-01 14:02:57 · 1 answers · asked by Chris 2 in Chemistry

i need to know

2007-11-01 14:01:36 · 8 answers · asked by dcrider2003 2 in Zoology

And show the work.

Here is the problem:
Charley wants to create a special mix of two coffees. One priced $6.40 per lb, the other at $7.28 per lb. How many pounds of the $7.28 coffee should he mix with 9 lbs of the 6.40 coffee to sell the mixture for $6.95 per pound?

2007-11-01 14:01:20 · 4 answers · asked by -Liz 3 in Mathematics

What mulitiplyed by what equals 175???

2007-11-01 13:59:18 · 4 answers · asked by Sarah S 1 in Mathematics

2007-11-01 13:59:08 · 4 answers · asked by Average Joes 4 in Chemistry

what happens when light is present and absent when cells reproduce ATP from nutrients in the environment
(i have a couple of ideas, but anything else will help... thanks)

2007-11-01 13:58:00 · 1 answers · asked by krisden 2 in Biology

I just have 3 problems I don't know how to do...

5. 3/x+2/5,x(equals with a line through it)0

(1) 1/x (2) 2x+15/5x (3) 5/x+5 (4) 2x+15/x+5


9.If 2x+5=-25 and -3m-6=48, what is the product of x and m?
(1) -270 (2) -33 (3) 3 (4)270
** for 9 could you possibly tell me the steps, i tried it and i keep getting it wrong and i think m doing a stupid mistake

14. In a telephone survey of 100 households, 32 householdspurchased brand A cereal and 45 households purchased brand B cereal. If 10 households purchased both items, how many of the households did not purchase either brand A or brand B cereal. Show work.


Thank you very very much! All answers appreciated!!

2007-11-01 13:56:10 · 3 answers · asked by Anonymous in Mathematics

1) Explain the surface circulation of the south Pacific Ocean and how it changes during an El nino event.

2) Explain the realtionship between ocean circulation patterns and atmosphere circulation and how they change during an El Nino Event.

2007-11-01 13:55:11 · 3 answers · asked by Karla Chokes Babies 1 in Weather

2007-11-01 13:54:47 · 2 answers · asked by Anonymous 1 in Botany

Where are the most railroads in the south? Like what country? Any help? Thank you. :)

2007-11-01 13:54:29 · 2 answers · asked by Anonymous in Geography

why must objects be cooled before their mass is determined on a sensitive balance?

2007-11-01 13:52:59 · 3 answers · asked by Tina 1 in Chemistry

S (e^(1/x) + 2) / x dx

I just need to see how this is worked out, thanks:)

2007-11-01 13:51:14 · 1 answers · asked by george p 2 in Mathematics

can someone please help me name these compounds!:

SnF2
HF
HBrO
IF
HI
HIO4
I2O5
Ba(CIO4)
(NH4)2SO4
Na2SO4 X 10 H20
FeBr3 X 6 H20
FeSiF6 X 6 H2O

2007-11-01 13:45:16 · 3 answers · asked by Anonymous in Chemistry

1) 8x^3+x^2-x+6 divided by x+1

2007-11-01 13:45:12 · 3 answers · asked by Dare to ask? 3 in Mathematics

2007-11-01 13:44:52 · 1 answers · asked by Anonymous in Biology

2007-11-01 13:41:09 · 3 answers · asked by Chlorine 2 in Chemistry

I am still not sure if he was aware of the concept but neglected to see the pattern, or if he just didnt have access to the information.

2007-11-01 13:41:00 · 5 answers · asked by motoson 4 in Chemistry

I need some help studying for my Earth and Space Science exam tommorow. Any info you have on my question would be very apreciated, and would help me out a lot.

2007-11-01 13:38:55 · 4 answers · asked by Anonymous in Astronomy & Space

2007-11-01 13:37:42 · 7 answers · asked by Aditya G 1 in Geography