Science & Mathematics - 4 February 2007

From the intersection of the two diagonals of a trapezium, are created two triangles with a line in the bases of the trapezium. If the areas of these two triangles are A1 and A2, prove that the area
of the trapezium is: A= (√S1 + √S2)^2.
(√- root quadrant)

2007-02-04 05:02:21 · 3 answers · asked by Crystal 3 in Mathematics

I have been stuck on this for EVER! No matter what I do, I can't come up with 7x. Any help would be great!

2007-02-04 05:01:36 · 5 answers · asked by slakerx 2 in Mathematics

2007-02-04 05:01:06 · 7 answers · asked by rockmouth2004 1 in Mathematics

need help solving for theta, i tried using identities but made it more complicated.

2007-02-04 04:59:42 · 2 answers · asked by john1587 1 in Mathematics

Can anyone please help me solve this, I am no good at this stuff.

2007-02-04 04:58:19 · 4 answers · asked by baumertmelanie 1 in Mathematics

Okay, my mom is in Pharmasudicals in college and me and her have tried the last 30 minutes tring to get this problem figured out!! Can anyone help us & explain how you the answer???

2007-02-04 04:57:49 · 4 answers · asked by Xx_Booty_Shakin_Cheerleader_xX 1 in Chemistry

I jus really want to know!

2007-02-04 04:56:48 · 13 answers · asked by iluvmickey 2 in Astronomy & Space

The lines of a right-angled triangle are positive integers: a, b, c. Prove that if the hypotenuse c is divided by 3 (without a remainder) than, each of the other two lines is divided by 3 (without a remainder).

2007-02-04 04:55:55 · 2 answers · asked by Crystal 3 in Mathematics

can someone please show me how to get the answer to this problem?

If f(1)= -1 and f(n+1)= [f(n)]^2 - 3, find f(4).

2007-02-04 04:55:01 · 2 answers · asked by Carley 3 in Mathematics

2007-02-04 04:54:39 · 4 answers · asked by Donna Q 2 in Mathematics

can anyone give me a list of alot of 3D shapes? please help!!!

2007-02-04 04:52:29 · 7 answers · asked by kmi361 1 in Other - Science

i mean the africans for example live in a very hot and sunny weather so thats why may be they are dark i know i sound stupid but i really wanna know ..

2007-02-04 04:52:09 · 14 answers · asked by REMO 3 in Weather

a)A particular oral contraceptive contains 0.038 mg of ethinyl estradiol in each pill. The formula of this compound is C20H24O2. How many moles of ethinyl estradiol are there in one pill?

I got tjis first part, the answer is 1.282e-07 mol


b)How many hydrogen atoms are there in one of these pills (due to the presence of ethinyl estradiol)?



c)What mass of hydrogen is this?


I can't figure out how to solve the rest

2007-02-04 04:52:04 · 2 answers · asked by bollocks 2 in Chemistry

2007-02-04 04:50:17 · 5 answers · asked by puppyluv96 1 in Physics

2007-02-04 04:49:53 · 14 answers · asked by daniel a 1 in Astronomy & Space

solve for x

2007-02-04 04:48:50 · 13 answers · asked by chickiejam 1 in Mathematics

i have a math problem someone wants me to do and we have difeerent answers for my question so could u plz help me and wat is 1and 1/2 doubled

the problem part of that is it took 1 1/2 hours to mow the first lawn and the second lawn took twice as long

2007-02-04 04:48:29 · 7 answers · asked by blue_Eyes03 2 in Mathematics

Did Marumi ever make a "Deep Sky" filter for astrophotography? I see one being offered as "58mm Marumi Deep Sky Filter" in an online classified advertisment. No one I have talked to is familiar with it. Does anyone know about it and how it worked?

2007-02-04 04:47:13 · 1 answers · asked by Search first before you ask it 7 in Astronomy & Space

solve for x

2007-02-04 04:47:11 · 17 answers · asked by chickiejam 1 in Mathematics

COmbine alike terms

2007-02-04 04:46:16 · 4 answers · asked by chickiejam 1 in Mathematics

5 (3 + 11) = 5 (3) + 5 (11) be specific with the naming include "of addition" or "of multiplication" if applicable.

Name the properties of real numbers????

2007-02-04 04:45:04 · 3 answers · asked by chickiejam 1 in Mathematics

1) MUltiply. Write the product in scientific notation.
(3.6 * 10^ -4)(9 * 10^8)

2) 24x^2y / 8x^3y^2

3) 3x^2 + 2x(x-1)

4) (-2)^3 / ( -2)^3

2007-02-04 04:44:13 · 2 answers · asked by Right here Right now 1 in Mathematics

In our everyday environment, diffraction is much more evident for sound waves than for light waves. Why is this so?

2007-02-04 04:41:33 · 1 answers · asked by Anonymous in Physics

If one of parents have a blood type of AB, it is impossible to have an offspring who has a blood type of O. However, i heard that if the AB is cis - AB, it is possible to have O type baby.
How is this possible, i want some more information..

2007-02-04 04:40:20 · 4 answers · asked by lsjlove4ever 1 in Biology

Millions of years ago the earth's atmosphere was full of steam but now there is alot less steam.

2007-02-04 04:39:58 · 6 answers · asked by Andrew S 1 in Earth Sciences & Geology

Help appreciated

2007-02-04 04:37:48 · 4 answers · asked by TheKingOfKnowledge 1 in Other - Science

2007-02-04 04:36:30 · 8 answers · asked by Anonymous in Mathematics

2007-02-04 04:33:08 · 3 answers · asked by hasan a 1 in Zoology

I took these pictures at 4:00am at a local gravyard. They have not been messed with by any editing program.

My camera is a FUJI FINEPIX DIGITAL 6.0 MEGAPIXEL camera, and is nearly brand new, and in very good condition - i.e I keep the lens clean, and free of dust/water, whatever.

On the night it was taken there was:

Good weather conditions, it was very clear, and not foggy at all, and the temperature was mild - not cold enough to turn your breath into steam.

Not raining, snowing, misty, windy - it was perfectly clear, and may I add - a full moon.

No people smoking around me - neither me or any of the people who I was with was smoking, or created smoke by setting fire to matches, or anything similiar.

So I present to you these two digital photographs, that have only been re-sized, noting else.

http://i122.photobucket.com/albums/o248/jonathanread/gyard1.jpg
http://i122.photobucket.com/albums/o248/jonathanread/gyard2.jpg


Your oppinions please :)

Thanks in advance.

2007-02-04 04:32:30 · 8 answers · asked by Anonymous in Other - Science

2007-02-04 04:30:22 · 2 answers · asked by Right here Right now 1 in Mathematics