Science & Mathematics - 29 January 2007

okay, so when we balance equations say i have like Fe +3 and NO3 - added to Na+ PO4 3-, do i just balance it like that, or do i do criss cross to determine subscripts?

help would be highly appreciated. :)

2007-01-29 12:10:22 · 3 answers · asked by Stacey 3 in Chemistry

2007-01-29 12:09:05 · 4 answers · asked by omygosh 4 in Biology

2007-01-29 12:06:53 · 3 answers · asked by >:] 5 in Physics

meaning well below their atmosphere/cloud/storms covering

2007-01-29 12:06:29 · 6 answers · asked by Count DiMera 2 in Astronomy & Space

So, I am wondering if today is 1-29-07 how many days until May 31st? Please do not answer it like this: 'Use your instincts' or 'Ask someone else' or 'Find out yourself'. Thank you!

2007-01-29 12:04:40 · 2 answers · asked by Binaツ 3 in Mathematics

In a rectangle, the width is 12 less than the length. The perimeter increased by 5 is 45. find the dimensions

2007-01-29 12:00:24 · 3 answers · asked by Briana 1 in Mathematics

I'm pretty sure that there are 3 ways?

2007-01-29 12:00:19 · 3 answers · asked by rachel 1 in Biology

2007-01-29 11:59:53 · 5 answers · asked by Gideon 1 in Earth Sciences & Geology

2007-01-29 11:59:51 · 6 answers · asked by kenneth h 6 in Biology

I was given the following problem:

Refer to the Real Estate data , which reports information on homes sold in Venice, Florida, last year. The data is available at the rEsource site.

Let selling price be the dependent variable and size of the home the independent variable.
a. Determine the regression equation.
b. Estimate the selling price for a home with an area of
2,200 square feet.
c. Determine the 95 percent confidence interval and
d. the 95 percent prediction interval for the selling price of a home with 2,200 square feet.

I was also given an excel spreadsheet of 105 examples with columns for price, bedrooms, size, pool, distance, township, garage, baths.

I have the feeling I probably need to graph this information, but how do I do that and how do I answer all these questions? Please help!

2007-01-29 11:59:45 · 2 answers · asked by Colique 2 in Mathematics

Mutiple personalities--is it possible that it involves possession?

Those nearing death often act like they see and hear things others don't---is it possible they're communicating with spiritual entities?

Basically--do you think there is any connection between mental illnesses and the paranormal?

2007-01-29 11:58:31 · 37 answers · asked by CosmicKiss 6 in Parapsychology

7k^2+10k-100=2k^2+55 Please help solve it.?
Can you show me how to do it in fractions step by step please i want to learn.
Explain it to me like if i was a retard please.
completing the square

i will really appreciate if u help me out please

2007-01-29 11:58:04 · 5 answers · asked by Ballerina 5 in Mathematics

I really want to touch a pinguin

2007-01-29 11:57:43 · 5 answers · asked by caitlin 1 in Zoology

I need a circuit for a constant current source using a 1.5v battery and a DC poswer supply.

2007-01-29 11:56:26 · 2 answers · asked by Sparky 2 in Engineering

W=violet w=white

W_ x ww

If you use WW x ww you get all white. If you use Ww x ww you get half white & half violet. So how do you know which is the correct one?

2007-01-29 11:55:56 · 3 answers · asked by Emerson 5 in Biology

ok we hhave found skeletons from about a million years ago, were monkeys ever found? ive never heard of this.

2007-01-29 11:55:55 · 4 answers · asked by Richard C 3 in Zoology

If one were to travel at or approach the speed of light, why is it that time dialates? I can't quite grasp the idea that just because an observer is traveling faster than light that time expands. Please help! Example would be appreciated.

2007-01-29 11:55:33 · 7 answers · asked by Ghidorah 3 in Physics

2007-01-29 11:55:08 · 3 answers · asked by kenneth h 6 in Medicine

2007-01-29 11:53:41 · 2 answers · asked by Anonymous in Mathematics

I just had a well drilled and I have had it tested for coliforms and e.coli and they are absent, but I think it tastes salty. Can I test for this myself at home?

2007-01-29 11:53:11 · 9 answers · asked by Christie H 1 in Chemistry

If it exist, then why does the some believe in eugenics? Are not one they both the same ? Just one is man made.

If natural selection exist, then eugenics would not be needed being that it is virtually the same.

2007-01-29 11:52:34 · 8 answers · asked by ? 6 in Biology

i am not asking for answers to my homework but i just cant remember what to do. i just need explanation. so like i need to change this equation into a slope intercept but like dont know how:
x-4y=-4 i dont know how to do it. please explain to me what u would to to make it y=mx+b

2007-01-29 11:51:08 · 10 answers · asked by Anonymous in Mathematics

Im a bit stuck on this proof example in the book, I will type it out and then show where I am stuck.

It says

Consider perpendicular lines AB and CD whose gradients are m1 and m2 respectively

If AB makes an angle (theta) with the x axis and CD makes an angle (theta) with the right axis therefore triangle PQR and PST are similar.

(To ellaborate seen as ya cant draw on this there are now 2 triangles on each perpendicular line PST is on line ab and has the angle theta with the x axis where it bisects line CD, PS is the height TP the hypotenuse and TS the base.

The other triangle is on line CD theta forms from the point where it bisects BA down parrallel to the y axis to Q and then to R.

So Gradient of AB is ST/PS =m1 (I get that)

and the gradient of CD is -PQ/QR i.e PQ/QR = -m2 (I get that)

**But ST/PS = QR/PQ (I get that because in similar triangles the sides have to divide in the same ratio)

Therefore m1 = - 1/m2 (Im lost here) How did they get to this from **

2007-01-29 11:48:25 · 2 answers · asked by John W 2 in Mathematics

please at least try to get me three

2007-01-29 11:47:01 · 2 answers · asked by lilbutterfly555 1 in Chemistry

what is an item that can relate to chemistry...it cant be anything illegal... and HOW does it relate to chemistry

2007-01-29 11:45:46 · 7 answers · asked by missunderstood 2 in Chemistry

I am interested in aerodynamics and engineering aircraft, but I don't have many informational resources readily avaliable to turn to. Can anybody help me please? Thanks, it is greatly appreciated!

2007-01-29 11:43:12 · 5 answers · asked by Sir Issac Newton 1 in Engineering

could it react w/ either Ag(NO3)2 or anything else

2007-01-29 11:43:11 · 1 answers · asked by THE ICE AGE 2 in Chemistry

2007-01-29 11:42:57 · 5 answers · asked by grshen80 2 in Earth Sciences & Geology

Use the geometric sequence of numbers 1, 1/3, 1/9 , 1/27. what is the ratio between two consecutive terms.

2007-01-29 11:42:51 · 3 answers · asked by brian_0680 2 in Mathematics

The question started at integrate cot^(3)X csc^(3)x

I simplified that to be
cox^(3)x / sin^(3) * 1/sin^(3)x

then multiplied to get cos^3X/Sin^6x

now i am stuck.

2007-01-29 11:41:31 · 3 answers · asked by meanest_pianist 2 in Mathematics