Science & Mathematics - 12 December 2007

How do I simplify this:

i^3(4-3i)

Show in steps and explain. Thanks!

2007-12-12 08:39:16 · 2 answers · asked by cgarletts 1 in Mathematics

2007-12-12 08:37:37 · 2 answers · asked by trek trek 5 in Chemistry

2007-12-12 08:35:32 · 7 answers · asked by Anonymous in Earth Sciences & Geology

I'm not sure I really like that show that much.
Well, ... not into that trend thang of reality shows.

ANYWAY, any good recommendations of GREAT paranormal true stories I can purchase on dvd that were created in the recent or distant past pls??
hey thanks

2007-12-12 08:32:52 · 9 answers · asked by Shuggah Pie Sweets 3 in Paranormal Phenomena

The question is, Since copper does not have a "u" in it, then why is it used in the atomic symbol for copper?

2007-12-12 08:31:21 · 15 answers · asked by summerlove32 2 in Chemistry

There has been a lot of new, weird technologies invented, i was wondering if that was one of them...if yes, then can you provide source?

2007-12-12 08:30:21 · 5 answers · asked by Anonymous in Engineering

x,y and z represent lengths
a) x+y
b) xy
c) xy/z
d) x/y+z
Could some please explain this to me? I'm not sure on this dimensional analysis, I got: length, area, volume and area
Thanks

2007-12-12 08:26:01 · 8 answers · asked by Anonymous in Mathematics

2007-12-12 08:25:12 · 3 answers · asked by snoopy4thkid 1 in Earth Sciences & Geology

could you please show how you did it, i have a whole bunch more i have to do and i dont know how to do them.

17. A container is partially filled with 12 liters of whole milk containing 4% butterfat. How much 1% milk must be added to get a mixture that is 2% butterfat?

18. An 80-pound grass seed mixture is 30% bluegrass seed. How many pounds of seed containing no bluegrass seed (0%) should be added to the seed mixture for a resulting blend that is 20% bluegrass seed?

2007-12-12 08:20:32 · 2 answers · asked by Anonymous in Mathematics

is a lunar month the length of time it takes a moon to go through a complete cycle of phases?

2007-12-12 08:18:49 · 4 answers · asked by xodanceox 2 in Astronomy & Space

2007-12-12 08:17:05 · 3 answers · asked by Anonymous in Astronomy & Space

Prove that the function defined by f(x) = (x-1/2) / [ x * (x-1) ] defines a bijection between (0,1) and R.

(R defining the set of real numbers)

2007-12-12 08:13:41 · 2 answers · asked by Anonymous in Mathematics

I saw it about 6:30 pm in southern Georgia, in the middle of the sky, directly overhead.

It had a definite tail, pointed on one end and grew into the cloud that spread out, about as big as a dime. It blinked/faded in and out, and was not moving. Definitely seemed not to be a meteor, because it was NOT moving!

2007-12-12 08:11:13 · 9 answers · asked by coreydsaragon 2 in Astronomy & Space

2007-12-12 08:10:28 · 6 answers · asked by mel 3 in Mathematics

I need to find the numbers and I am having trouble finding them! Can some one please help?

2007-12-12 08:09:51 · 2 answers · asked by Amanda S 2 in Mathematics

I have read it makes them "safe" -- I am assuming this just means it makes them so they wont burn your eye out if it shines right in your eye. Is there more to it than that?

2007-12-12 08:09:36 · 2 answers · asked by bdb4269 2 in Physics

2007-12-12 08:08:56 · 49 answers · asked by Anonymous in Zoology

can someone please help factor this:

n²-6n = 0

2007-12-12 08:08:08 · 3 answers · asked by Alaina 1 in Mathematics

how is it produced and purified
important uses of it

2007-12-12 08:03:24 · 1 answers · asked by kikikara16 1 in Chemistry

In this problem calculate the integral from 0 to 2 of f(x) =((x^2)/3 + 2 )dx by using the definition int of a to b of f(x) dx = lim of n to infty Sn {i=1}^{n} f(x_i)*Delta x
The summation inside the brackets is R_n which is the Riemann sum where the sample points are chosen to be the right-hand endpoints of each sub-interval.

Calculate R_n for f(x) = (x^2)/3 + 2 on the interval [0, 2] and write your answer as a function of n without any summation signs

R_n = ?
lim_{n to infty} R_n = ?

2007-12-12 08:02:30 · 1 answers · asked by Anonymous in Mathematics

2007-12-12 08:00:15 · 18 answers · asked by Anonymous in Botany

cat, dolphin, raven, cuttlefish?

2007-12-12 07:59:20 · 14 answers · asked by Anonymous in Zoology

How many moles of solute particles are present in 1 L of each of the following aqueous solutions?
(a) 0.4 M KI
mol
(b) 0.090 M HNO3
mol
(c) 10-4 M K2SO4
mol
(d) 0.07 M ethanol (C2H5OH)

2007-12-12 07:58:56 · 5 answers · asked by cntrstrk132 1 in Chemistry

2007-12-12 07:53:14 · 8 answers · asked by Yahoo Man 1 in Astronomy & Space

which ion in each pair has the smaller atomic radius

K- or O2-
Ba2+ or I-
Al3+ or P3-
K+ or Cs-
Fe2+ or Fe3+
F- or S2-

2007-12-12 07:53:02 · 2 answers · asked by Tr4ck4Inc@ 2 in Chemistry

I would like to hear your answers...without contradicting yourself. Ready set go.

2007-12-12 07:52:08 · 11 answers · asked by jbsjunkie707 1 in Biology

2007-12-12 07:51:46 · 10 answers · asked by CheetosMonster00 1 in Zoology

desperate help needed

2007-12-12 07:46:08 · 19 answers · asked by Anonymous in Mathematics

2007-12-12 07:44:45 · 6 answers · asked by Brenda S 1 in Zoology

what do you think are some reasons for this?

2007-12-12 07:44:30 · 5 answers · asked by CheetosMonster00 1 in Agriculture