Science & Mathematics - 14 September 2007

Find all roots of the polynomial P(x) = x^ 4 + 9.

a. (±√ 3 ± i √3)/2

b. (−√ 6 ± i √6)/2

c. ± √3i and ±√ 3

d. (± √6 ± i √6)/2

e. (± √3 ± i √6)/2

2007-09-14 01:48:28 · 2 answers · asked by Anonymous in Mathematics

2007-09-14 01:48:05 · 5 answers · asked by Anonymous in Physics

Find all rational roots of the polynomial:
P(x) = 5 x ^4 - 27 x ^3 + 40 x ^2 - 22x + 4 , then find the
irrational roots, if any.

a. 2/5, 1, and 2 ± √2
b. 2/5 and 1 ± √2
c. -1/2, 1/4 and (3 ± √5)/2
d. 1/3 and 1
e. -2/3 , 5/2 and 3 ± √3

2007-09-14 01:47:57 · 3 answers · asked by Anonymous in Mathematics

2007-09-14 01:44:12 · 3 answers · asked by Gttu M 1 in Other - Science

2007-09-14 01:39:52 · 4 answers · asked by JazzieJones 1 in Physics

Is there any strength in the idea that bumble bees are too large to fly when their body weight (ratio) is compared to their wing size?

Recently I heard the 'theory' that because they aren't aware of that belief they aren't affected by it. True or no...?

2007-09-14 01:38:54 · 4 answers · asked by mulroy1563 3 in Zoology

The least we could do is build something cool up there like a space station or something.

2007-09-14 01:36:07 · 8 answers · asked by Anonymous in Astronomy & Space

Find all rational roots of the polynomial:
P(x) = 2/3x ^6 - x ^5 - 13/3x^ 4 + 29/3x^ 3 - 9 x ^2 + 32//3x - 4 , and then find the irrational roots, if any.

a. -3, 1/2, and 2
b. -3, -1/2, and 1
c. 1, 2, and 5/2
d. 2/3, 4/3, and 2
e. -1/2, 1, and 3

2007-09-14 01:32:17 · 1 answers · asked by Anonymous in Mathematics

Whats the blak lol pls helpllpplllp!

2007-09-14 01:18:36 · 3 answers · asked by * * 1 in Biology

A furlong, a measure of distance used in horseracing, is defined as 201.168 meters. What is the distance in feet of the Kentucky Derby, which is a 10-furlong race? Use the conversion: 1 inch = 2.54 cm.

2007-09-14 01:17:53 · 2 answers · asked by Anonymous in Mathematics

Examples would be much appreciated.

Here is one example: The matrix: flying and engaging in fights midair violates the laws of physics.

2007-09-14 01:17:43 · 3 answers · asked by Anonymous in Physics

Since I'm only doing Standard Level Biology, I don't need to know the details and I would prefer a one- or two- sentence answer that will clarify the general differences between starch and cellulose.

I know they have some kind of correlation . . .

Thank you.

2007-09-14 01:13:09 · 8 answers · asked by Anonymous in Biology

I figure they could go up and claim the stuff up there because it's been up there for almost half a decade and bring it back and sell it off at a auction and make enough money to cover part of the cost of going up there.

2007-09-14 01:10:27 · 10 answers · asked by Anonymous in Astronomy & Space

not sure how to do these..Im supposed to write the partial equations for the following and then write the products I believe will form. Any help??

1) Fe(s) + Cu(2+) (aq)----->
2) Mg(s) + 2 H(+) (aq)------>
3) Cu(s) + 2 Ag(+) (aq)------->
4) Zn(s) + Cu(2+) (aq)------>
5) Cu(s) + Zn(2+) (aq) ------>

2007-09-14 01:09:11 · 1 answers · asked by Anonymous in Chemistry

I was wondering where the rhine river is located. I cannot remember. thanks :]

2007-09-14 01:07:55 · 8 answers · asked by Nicole S 1 in Geography

How many grams of Bromine are in 3.5x10^9 g of seawater which contains 65 ppm by mass Bromine


I need help figuring out how to do the problem. if you show me the work I will reward you the points

2007-09-14 01:03:32 · 1 answers · asked by Anonymous in Chemistry

2007-09-14 01:02:44 · 7 answers · asked by exo 7 in Biology

How many atoms are in 2.4 grams of Strontium

I have the answer I just dont know how to do the problem, please show work and I will give you the pts.

2007-09-14 01:02:06 · 3 answers · asked by Anonymous in Chemistry

x , y , z = ?
( 7 / x + y )=( 6 / x + z )=( 9 / y + z )
and ( x + y )( Y + z )( z + x ) = 24192

2007-09-14 00:53:58 · 1 answers · asked by dragoi_stefan06 2 in Mathematics

My friend and I have recently begun an email correspondence. Every weekend we send each other a question in our area of expertise. While I do posses a very logical mind, I am by no means a great mathematician, he is. This week his question to me was: "Why is an equation that contains a number divided by zero undefined?"

The answer I came up with is: "An equation containing a number divided by zero is undefined for it compromises the validity of known mathematical laws."

In explanation: "If we take the fraction 4/2. We know for a fact that this is equal to 2. We should therefore be able to reverse the process and come to the logical conclusion that 2x2 is equal to 4. In contrast take the fraction 5/0, the two most logical guesses at the solution to this fraction would be 5 and 0. When trying to reverse the process we come to 5x0 and 0x0 respectively. Neither of which equal the original fraction 5/0. This constitutes an inconsistency in mathematical law."

2007-09-14 00:50:18 · 4 answers · asked by Anonymous in Mathematics

Augustus De Morgan, an English mathematician who lived in the 19th century, once said, "I was x years old in the year x2". He was born in 1806. A different person, born in the 20th century, will be x years old in the year x2. In what year was the person born?

2007-09-14 00:49:43 · 2 answers · asked by Manoura 2 in Mathematics

2007-09-14 00:45:03 · 8 answers · asked by anirudhkrpr 2 in Physics

All kids I know sink in the pool unless they have a floatation device. So I"m curious as to why young children don't float. I would have thought it would be natural. So I guess, the question could also be what mechanism causes you to float?

2007-09-14 00:40:36 · 10 answers · asked by Timmimom 2 in Biology

Can we seal the Yellowstone volcano from exploding?
Even if it will explode in 100.000 years, and im not from the USA, we must all put our minds to it and stop it from affecting the world and killing millions of people.
Our ideeas can save lives, so put your thinking caps on this one.

2007-09-14 00:32:38 · 7 answers · asked by andreibrebe 1 in Earth Sciences & Geology

Find the Tangents
y=x^3-2x^2+x+5
find the equation for the tangents when y=5

2007-09-14 00:30:24 · 3 answers · asked by Anonymous in Mathematics

While scientists spend time, efforts and money with high risks researching deep sea for clues of universe. Why don't they try Peru's dried out salt lake which has respective life span like others in Atlantic or Pacific or even more? I think there are still lots of fossil deposits in good preservation there at the bottom of this salt lake!

2007-09-14 00:28:13 · 1 answers · asked by stanley 2 in Earth Sciences & Geology

The position of a small object is given by X=34+10t+2t^3, where t is in seconds and x in meters. X is a function of t when graphed t=0 to t=3.0.

what is the average velocity of the object between 0 and 3.0s? at what time between 0 and 3.0s is the instantaneous velocity zero?

2007-09-14 00:27:26 · 3 answers · asked by Mimi 1 in Physics

a , b ,c (this numbers are not zero) ....invers proportional...5 , 6 ,10 and (a^2 + b^2 + c^2 / abc) = 14 / 18
/ - fraction line
^ - means raised to ....

2007-09-14 00:21:42 · 1 answers · asked by dragoi_stefan06 2 in Mathematics

2007-09-14 00:13:50 · 10 answers · asked by sin03 1 in Mathematics

2007-09-14 00:12:08 · 13 answers · asked by im_uk 1 in Geography