Science & Mathematics - 22 November 2007

and why?

i always wonderd if there was a ecosystem that we dont need

and why do we need musquitos to live?what are they doing that keeps us alive?

2007-11-22 13:10:48 · 7 answers · asked by Lasagna delivery guy 5 in Biology

x^2 - 2x - 2400 = 0
= x^2 - 2x +1 - 1 -2400
= (x-1)^2 - 2401
correct?

2007-11-22 13:10:45 · 5 answers · asked by Bo 3 in Mathematics

like..
what is the result?
half dog, half cat creature??

2007-11-22 13:03:44 · 12 answers · asked by Miss Green 3 in Zoology

0 <= theta < 2pi

Could someone please explain how to solve these? Thanks.

1. sin 2theta sin theta = cos theta

2. cos 2theta + 5 cos theta + 3 = 0

2007-11-22 12:57:55 · 3 answers · asked by labelapark 6 in Mathematics

can you differ between gulf & bay

2007-11-22 12:57:47 · 3 answers · asked by Anonymous in Geography

Solve using a matrix:

x - 2y = 6

4x - 3y = 4

2007-11-22 12:57:45 · 4 answers · asked by Anonymous in Mathematics

How many wavelengths per second are in one mega hertz? Or am I completely confused, and mega hertz isn't a unit used to measure this?? If so, what is it?

2007-11-22 12:44:38 · 2 answers · asked by pspkilla 4 in Mathematics

the pow is the follow:

Pow 13 - Corey Camel

Consider the case of Corey Camel - the enterprising but eccentric owner of a small banana grove in a remote desert oasis. Corey's harvest, which is worth its weight in gold, consists of 4000 bananas. The marketplace where the harvest can be sold is 1000 miles away. However, Corey must walk to the market, and she can carry at most 1000 bananas at a time. Furthermore, being a camel, Corey eats one banana during each and every mile she walks (so Corey can never walk anywhere without bananas).

The question is this:
How many bananas can Corey get to the market?

2007-11-22 12:42:15 · 3 answers · asked by hect100 1 in Mathematics

The teacher leaves the school a little after six p.m. and notices the hands on her watch form a one-hundred ten degree angle. Returning before seven p.m. she again notices that the hands form a one-hundred ten degree angle. How many minutes have elapsed while the teacher was away?

i tried this problem but i dont know how to do it, esp when i remebered that the hour hand moves too! plz show work.

2007-11-22 12:40:35 · 4 answers · asked by Anonymous in Mathematics

I just can't visualize it at all. No equations please. I have zero math skills. Explain the theory of relativity to me like I was a four year old.

2007-11-22 12:40:32 · 3 answers · asked by ricnoodle 4 in Physics

I've always wanted to know

2007-11-22 12:38:02 · 12 answers · asked by Anonymous in Other - Science

2007-11-22 12:37:48 · 3 answers · asked by Connie H 1 in Chemistry

2007-11-22 12:35:32 · 2 answers · asked by Anonymous in Mathematics

2007-11-22 12:34:40 · 6 answers · asked by Anonymous in Mathematics

and can there be any other methods for immune helth for our buzzy friends

2007-11-22 12:34:03 · 2 answers · asked by Wesley!!! 3 in Zoology

2007-11-22 12:31:53 · 3 answers · asked by Anonymous in Geography

P.S: I don't know anything about GPS

2007-11-22 12:30:22 · 3 answers · asked by Brad 1 in Geography

A machine is a rolling a metel cylinder under pressure. The radius of the cylinder is decreasing at a constant rate of 0.05 inches per second and the volume V is 128π cubic inches. At what rate is the length h changing when the radius r is 2.5 inches? [Hint: V = (π)(h)(r^2)]

2007-11-22 12:29:58 · 2 answers · asked by Oscar A 2 in Mathematics

which substance has the greatest molecular mass? A)H202 B)NO C)CF4 D)I2

AND PLEASE EXPLAIN HOW U GOT THE ANSWER!!!

2007-11-22 12:29:17 · 1 answers · asked by Anonymous in Chemistry

The problem can be found here:
http://img229.imageshack.us/img229/3647/q26ry7.jpg

I'm guessing that it is in the second line of the solution. Not sure how would I express this big boy as a single log?

Thanks!

2007-11-22 12:27:07 · 7 answers · asked by ms_lotr_freak 3 in Mathematics

2007-11-22 12:26:12 · 4 answers · asked by Anonymous in Biology

my name is kaliana and there is alot of smart people out there and i need your help!!!

2007-11-22 12:25:03 · 4 answers · asked by Anonymous in Earth Sciences & Geology

A crank 20 cm long, starting at 60 degrees from the horizontal, sweeps out a positive angle at the uniform rate of 10 rad/s.

Determine a function that gives the height of the end of the crank from the horizontal line at any time t.

Someone please help me on this question, but trying to figure it out for a while now.

2007-11-22 12:23:31 · 3 answers · asked by Jack L 2 in Mathematics

2007-11-22 12:23:28 · 3 answers · asked by kobedabest 2 in Geography

2007-11-22 12:22:09 · 13 answers · asked by HickityDooDa 2 in Biology

Two friend and I went to a hotel:

We had to pay $30 for a double room so we each payed $10 (3x10=30)
The owner apparently forgot to mention to the receptionist that this night was on special for $25/night.
The receptionist brought us the five dollar back, we gave him two dollars as a tip out of the five and kept 3 dollars (1 dollar each)

So we now each payed $9 per person (9x3=27) + we gave two dollar back to the receptionist (27+2=29)

What in the world happen to the last dollar?

Happy thanksgiving thinking about that! :-)

2007-11-22 12:20:16 · 5 answers · asked by DRC Frank 5 in Mathematics

Mr. Adams buys a bag of apples and a bag of pears for a total of $14.00. There are eight pounds of fruit in all. The apples cost $1.50 per pound, and the pears cost $2.30 per pound

2007-11-22 12:20:15 · 2 answers · asked by Anonymous in Other - Science

i work in automation feild. schneider integrator comp. so i'll be greatful if there is Ex. prog. on PL7 ot Twidosoft

2007-11-22 12:14:44 · 1 answers · asked by sh_sunsea 1 in Engineering

2007-11-22 12:14:35 · 8 answers · asked by Anonymous in Astronomy & Space

y=x^2+2x-2
y=3x+4

2007-11-22 12:13:51 · 4 answers · asked by Anonymous in Mathematics