Science & Mathematics - 14 November 2007

Find the complex zeros of this polynomial function. (Select all that apply.)
f(x) = x^4 + 5x^2 + 4

how do you do this? thanks so much!

2007-11-14 11:03:08 · 1 answers · asked by CS 1 in Mathematics

http://public.fotki.com/cyberkatis/paranormal/emilys_bridge/floating.html

This is Emily's Bridge--THE infamous Emily's Bridge....

2007-11-14 11:01:48 · 21 answers · asked by Anonymous in Paranormal Phenomena

thank ya...
oh and do you know what the BEST colleges are for these majors?
thank ya again :)

2007-11-14 10:54:43 · 6 answers · asked by catch me if u can ;) 3 in Engineering

A polynomial function of degree n with real coefficients has exactly n complex zeros. At most n of them are real zeros.

true or false? and why?

thanks so much

2007-11-14 10:53:43 · 1 answers · asked by bombenistic27 1 in Mathematics

65.45 % C
5.49 % H
29.06 % O

5.51 g of the compound fills a 193.0 ml bottle with a pressure of 4752.4 mm Hg at a temperature of 21.0oC

2007-11-14 10:51:19 · 1 answers · asked by Anonymous in Chemistry

In humans, the trait for A type blood and B type blood show incomplete dominance, so that a person with both genes has blood type AB. Both A and B dominate type O. A person with a gene for type A blood and type O blood marries someone with a gene for type B blood and type O blood. List the types of offspring they could have and the probability for each blood type in the offspring.

2. Suppose that gene b is sex-linked, recessive, and lethal. A man marries a woman who is heterozygous for this gene. If this couple had many normal children, what would be the predicted sex ratio of these children?

3. A particular sex-linked recessive disease of human beings is usually fatal. Suppose that by chance, a man with the disease lives past puberty and marries a woman heterozygous for the trait. If they have a daughter, what is the probability that she will have the disease?

2007-11-14 10:51:17 · 2 answers · asked by Anonymous in Biology

2007-11-14 10:51:02 · 1 answers · asked by ahimed B 1 in Medicine

5.51 g of the compound fills a 193.0 ml bottle with a pressure of 4752.4 mm Hg at a temperature of 21.0oC.

65.45 % C

5.49 % H

29.06 % O

2007-11-14 10:48:02 · 3 answers · asked by Anonymous in Mathematics

2007-11-14 10:47:45 · 3 answers · asked by Tangela * 1 in Mathematics

Ok, could somebody tell me if I did this question right?

The question is:
The derivative of f(x) is f'(x)=6x(2x-5)^2(3x+8)^3. Using interval notation, tell where f(x) is increasing and where it is decreasing.

So I solved 6x(2x-5)^2(3x+8)^3=0 and got the critical values of x=0, x=5/2, and x= -8/3. Are these right? I know this should be simple algebra but im blankinggg.

Next I found that f(x) is decreasing on the interval (-infinity,o] and increasing on [0, +infinity).

Is this right? Thanks to anyone who can help.

2007-11-14 10:46:32 · 2 answers · asked by PhysicsDumbass 1 in Mathematics

2007-11-14 10:46:08 · 6 answers · asked by hamid411200 1 in Mathematics

On second floor in lawyer's office the burglar took $5000 from the safe.
On third floor in the office of insurance company the burglar found nothing.

On the morning the jeweler prepared insurance claim for $25,000 of stolen jewerly and paid $10,000 to the lawyer to help him.
The lawyer took the papers and went upstairs to the office of insuarance company and filed the claim.
The insuarance clerk accepted jeweler's claim and passed it to company headquateres, accompanied by the report that the burglar stole $5,000 (which money were actually embezzled by the clerk).

The insuarance company was forced of to write off $30,000 loss accordingly.
What portion of the $30,000 was respectively pocketed by
the thief,
the jeweler,
the lawyer, and
the clerk?

2007-11-14 10:45:09 · 2 answers · asked by Alexander 6 in Mathematics

How much work did the wrestler do on his opponent?

2007-11-14 10:43:56 · 3 answers · asked by navya 1 in Physics

A football player picks up a football, runs with it, and then throws is to a teammate. Describe the work done on the ball.

2007-11-14 10:41:13 · 1 answers · asked by Katey 1 in Physics

i already asked my mom but she never took algebra 2 & i'm homeschooled so please just show me the steps to solve it (its probably simple & i might know how but i'm just confused)



Peter says that the following equations are two ways to write the SAME formula. Solve them both for the same variable to decide whether or not you agree with Peter. Explain how you made your decision, based on solving for variables.

p = (r - 1)/r
(p equals r minus 1 over r)

p = r/(p + 1)
(p equals r over p plus 1)

thanks so much!

2007-11-14 10:40:57 · 5 answers · asked by Asha 2 in Mathematics

2007-11-14 10:40:07 · 8 answers · asked by Rosalyn W 1 in Mathematics

Does wool or nylon or anyother type of thread have a chemical formula if so what is it?

2007-11-14 10:38:54 · 5 answers · asked by curly* 2 in Chemistry

I don't just need the answer. I need to see the method in a generic equation form, as well.

2007-11-14 10:37:25 · 5 answers · asked by Anonymous in Mathematics

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 9.50*10E-23 kg·m/s, and 5.30*10E-23 kg·m/s, respectively. What is the magnitude and direction of the momentum of the second (recoiling) nucleus?
Magnitude?
____________ kg·m/s

2007-11-14 10:37:18 · 2 answers · asked by Anonymous in Physics

I know you would use a red for an acid and a blue for a base but why....

2007-11-14 10:36:06 · 2 answers · asked by Anonymous in Chemistry

A 20.0-kg floodlight in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole. A cable at an angle of 30.0° with the beam helps to support the light. Find (a) the tension in the cable and (b) the horizontal and vertical forces exerted on the beam by the pole.

if a picture would help, go here:
http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&q=a+fishing+pole+is+long+and+inclined+to+the+horizontal+at+an+angle+of+what+is+the+torque+exerted+by+the+fish+about+an+axis+perpendicular+to+the+page+and+passing+through&btnG=Search

and click on the second link; it is a microsoft word file, and it is problem # 22

2007-11-14 10:35:21 · 1 answers · asked by sccrsweetie 2 in Physics

Two cars are traveling along perpendicular roads, car A at 40 km/hr east, car B at 20 km/hr south. When car A reaches the point where their paths have an intersection, car B is 100 km north of the intersection. Find the rate at which the cars are separating from one another 2 hours later.
I got 20 km/hr, but this seems wrong. I did the entire set up; I didn't just subtract the numbers. Can someone check my answer please, and explain if I'm wrong?

2007-11-14 10:34:28 · 1 answers · asked by Deborah P 2 in Mathematics

2007-11-14 10:34:13 · 10 answers · asked by rdgtchr 1 in Geography

2007-11-14 10:34:09 · 5 answers · asked by Anonymous in Chemistry

What must the emf in the figure be in order for the current through the 7.00-ohm resistor to be 1.76A? Each emf source has negligible internal resistance.
Figure: http://i239.photobucket.com/albums/ff92/anakris_24/yf_Figure_26_51.jpg

Appreciate the help :)

2007-11-14 10:33:31 · 3 answers · asked by Hannah 4 in Physics

2007-11-14 10:32:27 · 4 answers · asked by Bruno S 3 in Biology

For the resistor network shown in the figure, the ohmmeter reads 20.2ohms. What is the resistance of the resistor X?
Figure: http://i239.photobucket.com/albums/ff92/anakris_24/yf_Figure_26_49.jpg

Thanks for the help :)

2007-11-14 10:31:16 · 2 answers · asked by Hannah 4 in Physics

Solve by using systems of equations.

2007-11-14 10:28:32 · 11 answers · asked by sue m 2 in Mathematics

I was looking in several astronomy books in my bookcases, and I see different figures given for the amount of time it takes our Sun and its family of planets, asteroids, etc. to travel once around our galaxy. some of my books are old, while others are new. Does anyone know the latest estimate?

2007-11-14 10:28:26 · 3 answers · asked by miyuki & kyojin 7 in Astronomy & Space

a) A resistance R2 is connected in parallel with a resistance R1. Derive an expression for the resistance R3 that must be connected in series with the combination of R1 and R2 so that the equivalent resistance is equal to the resistance R1.

b) A resistance R2 is connected in series with a resistance R1. Derive an expression for the resistance R3 that must be connected in parallel with the combination of R1 and R2 so that the equivalent resistance is equal to R1.

Thanks. Appreciate the help :)

2007-11-14 10:26:47 · 2 answers · asked by Hannah 4 in Physics