Science & Mathematics - 13 August 2007

Please help me with this one. you have to solve the differential equation.

1. dy/dx=( y^2 + xy^2) / (x^2y - x^2)

2007-08-13 17:19:13 · 5 answers · asked by Anonymous in Mathematics

2007-08-13 17:15:16 · 1 answers · asked by vivs 2 in Earth Sciences & Geology

My guess is 2179, middle of the Atlantic.

2007-08-13 17:13:22 · 3 answers · asked by Boo-shniggins 2 in Astronomy & Space

31X + 12Y - 24Z = 105

18X + 24Y + Z = 77

12X - 6Y + 4Z = 5

2007-08-13 16:59:51 · 2 answers · asked by Anonymous in Mathematics

2007-08-13 16:58:27 · 2 answers · asked by curious 1 in Earth Sciences & Geology

2007-08-13 16:56:19 · 2 answers · asked by SUJAY 1 in Physics

wat is that thing that astronauts use when the are training? That thing that they get in and it spins faster and faster, and revolves around a big room.

2007-08-13 16:45:58 · 4 answers · asked by Anonymous 1 in Astronomy & Space

There are some cells that can not go through Mitosis. In other words, an organism can not make any new ones when the cells die. Human nerve and muscle cells are examples. Explain how this might affect a person who has a heart attack and part of their heart muscle is damaged

2007-08-13 16:43:25 · 4 answers · asked by ~ Deeply Madly Truly ~ 1 in Medicine

I have the velocity reading in an 8 inch pipe and want to convert this to a flow rate in cubic feet per minute. Thanks.

2007-08-13 16:40:13 · 7 answers · asked by Anonymous in Mathematics

It would be helpful to have an explaination to the question. This applies to the early stages of the universe when the first galaxies were beginning to form. Thanks to anyone who helps.

2007-08-13 16:39:28 · 5 answers · asked by Metal 1 in Astronomy & Space

Which is the oldest and youngest part of a galaxy?
Which is the oldest and youngest part of a galaxy? Center? Outer edges? For example, are we likely to find more advanced intelligent life in the center of the galaxy or farther away from the center?

2007-08-13 16:36:24 · 5 answers · asked by SpaceMan 1 in Astronomy & Space

Can't figure these out, please help.

4. Suppose X and Y be independent normal random variables, with distributions N(μ, sigm) = N(5, 3) and N(2, 4) respectively. Let W = X + 2Y + 1.
Compute
(a) E(W); (b) V (W); (c) Prob(W < 0) (d) Cov(X,W) .
5. Suppose that X and Y are rv’s which only assume the values 0 and 1. Suppose that the joint pmf p(x, y) satisfies p(0, 0) = .3, p(0, 1) = .4, p(1, 0) = .2.
(a) What is p(1, 1)?
(b) Compute E(2X − Y ).
(c) Are X and Y independent?
(d) Compute the conditional pmf pX(x).
6. Suppose that the number of phone calls Tara receives in the evening is a Poisson process with rate 2 per hour, and the number of calls I receive is an independent Poisson process with rate 0.1 per hour.
(a) At 6 p.m., Tara returns home and happily waits for her next
phone call. What is the probability that she will get a call before 7:30 pm?
(b) What is the probability that at least one of us receives at least one phone call between 6 and 7:30 pm?

2007-08-13 16:25:37 · 2 answers · asked by Anonymous in Mathematics

solve the equation.. show work!!


1) |4x-9|= -4


2) x+1 - 2 {x+11} = 0 { }= square root symbol..since there isnt one on the keyboard!!

Thanks!

2007-08-13 16:23:39 · 6 answers · asked by sexycheerleader2009 3 in Mathematics

i heard that the pressure on the molten rock near the core makes it into a solid.

2007-08-13 16:23:15 · 11 answers · asked by Anonymous in Earth Sciences & Geology

2007-08-13 16:22:27 · 12 answers · asked by Joy A 1 in Earth Sciences & Geology

Will you help me with this geometry question, please?
Thank you a bunch.
And show/explain how to get the result?

What is the area of a 13 by 14 by 15 triangle?

Thanks a bunch. <3

2007-08-13 16:18:49 · 9 answers · asked by eirhya 1 in Mathematics

2007-08-13 16:17:21 · 9 answers · asked by chellapandi k 1 in Mathematics

solve by extracting the square roots

(r+6) squared =10

solve using the quadratic formula.

7x squared + 12x = -3

thanks!

2007-08-13 16:16:29 · 3 answers · asked by sexycheerleader2009 3 in Mathematics

I heard that Mars is going to be close to Earth on August 27. How far will it be from Earth exactly?

2007-08-13 16:14:54 · 6 answers · asked by Anonymous in Astronomy & Space

who was the one who came up with algebra?

2007-08-13 16:13:20 · 8 answers · asked by bandgirl818 1 in Mathematics

2007-08-13 16:12:12 · 7 answers · asked by Kacey D 1 in Astronomy & Space

I
Turn an open bottle upside-down for a draining experience... or maybe not.

Ingredients:

-Water (Do Not use a carbonated beverage like soda for this trick.)

- Empty glass drink bottle (any kind will work)

- Paper napkin or any small piece of paper

The Recipe:

1) After you finish emptying a glass bottle, refill it to the brim with water. Fill it so high that you get a little water bulging at the top of the bottle.

2) Tear-off or find a piece of paper that is a little bigger than the mouth of the bottle.

3) Place the paper over the mouth of the bottle.

4) Lightly tap the paper on top of the bottle to make sure it gets wet and makes a good seal with the bottle's glass lip.

when you flip it over the water doesnt drip.

2007-08-13 16:10:03 · 3 answers · asked by Madeline G 2 in Chemistry

2007-08-13 16:09:03 · 2 answers · asked by Anonymous in Physics

I think I lknow the answer to this one but I'd like some feed back. The question reads as followed: Suppose at the kickoff of a football game, the kick return man catches the ball at the left side of the goal line and runs for a TD diagonally across the field. How many yards did he run? (The field is 100 yards long and 160 feet wide.)

Well just from playing the sport I know that 40 yards = 160 feet. When I worked the problem I got 120 yards ran by the return man.

2007-08-13 16:05:22 · 5 answers · asked by Anonymous in Mathematics

2007-08-13 16:03:26 · 11 answers · asked by Anonymous in Chemistry

Given the polynomial

p(x)=2x^3+17x^2+23x-42 and one of its factors x+6

a. how many zeros will there be? how do u know that?

b. find the remaining factors of the polynomial

c. please explain in words how you found the others.

2007-08-13 16:00:41 · 3 answers · asked by Anonymous in Mathematics

Will you help me with this geometry question, please?
Thank you a bunch.
And show/explain how to get the result?

I go 100 miles North, 100 miles west, and 100 miles south, ending up at the same spot where I began. Where did I begin?

Thanks a bunch. <3

2007-08-13 16:00:39 · 3 answers · asked by Anonymous in Mathematics

I want to be a doctor and I've narrowed it down to three specialties. Which do you think is the most fun and most rewarding?

2007-08-13 15:59:40 · 5 answers · asked by Anonymous in Medicine

3 dice are tossed. what is the probability of getting exactly one five??

2007-08-13 15:57:09 · 10 answers · asked by Anonymous in Mathematics

The news said that their was gonna be a meteor shower in the sky near Perseus. I only have binoculars. Any solutions?

2007-08-13 15:54:15 · 3 answers · asked by Anonymous in Astronomy & Space