Science & Mathematics - 5 October 2007

A)People could mine for copper and gold.
B)Floods provided water for crops.
C)Plants and animals were more abundant.
D)People could use tools to dig ditches.

2007-10-05 12:54:21 · 6 answers · asked by sharae1606 1 in Earth Sciences & Geology

2007-10-05 12:48:35 · 11 answers · asked by sugaaars 1 in Mathematics

2007-10-05 12:46:38 · 4 answers · asked by Anonymous in Biology

Please explain the reaction(s) that take(s) place

2007-10-05 12:42:02 · 3 answers · asked by Chris D 1 in Chemistry

How old are they now?

2007-10-05 12:40:12 · 12 answers · asked by Anonymous in Mathematics

Ron pours 4 ounces of coffee into an 8 ounce cup and 4 ounces of cream into a 2nd cup of the same size. She then transfers 1/2 the coffee from the 1st cup to the 2nd, and after stirring thoroughly, she transfers 1/2 the liquid in the 2nd cup back to the 1st.What fraction of the liquid in the 1st cup is now cream???

2007-10-05 12:34:26 · 11 answers · asked by ~USA~ 2 in Mathematics

Some fluorescents that contain high levels of mercury I understand but I need specifics and I'm having little luck aside from how to recycle them but that doesn't apply.

2007-10-05 12:32:03 · 2 answers · asked by Anonymous in Chemistry

if you don't know, then plz tell me what a reciprocal is

2007-10-05 12:31:32 · 10 answers · asked by Anonymous in Mathematics

ive drawn a scatter plot graph and this contains my known values for x and for y . my problem is i have a value for y and it plots on the graph but i can't seem to find how to calculate its x value. i'm using excel. any help'd be great !!

my graph is for results from a uv vis scan

2007-10-05 12:30:28 · 3 answers · asked by dooralarm 2 in Other - Science

use two equations in two variables to solve the folowing question
at an IMAX theater, the giant rectangular movie screen has a width 13 feet less than its length. if its perimeter is 270 feet, find the area of the screen.

2007-10-05 12:29:30 · 3 answers · asked by Lindsay Y 1 in Mathematics

2007-10-05 12:27:14 · 6 answers · asked by Anonymous in Earth Sciences & Geology

are stroms a good thing or a bad thing?,what do you think( im doing a sort of survey) thanx oxo

2007-10-05 12:26:13 · 10 answers · asked by Anonymous in Weather

He guys i have a science fair in December i need some project ideas i love plants( flowers, fruit plants, etc.) So i` d like to plant biology. Thanks so much ( =

2007-10-05 12:21:22 · 6 answers · asked by Madison 2 in Biology

what metals are fishing poles made out of i dont know and i am really into fishing

2007-10-05 12:20:50 · 8 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-05 12:20:38 · 8 answers · asked by Dave H 2 in Medicine

How would you find the first number?

2007-10-05 12:19:57 · 7 answers · asked by Anonymous in Mathematics

2007-10-05 12:18:42 · 16 answers · asked by catherine m 1 in Geography

What is it usually used for??
Is it illegal?

2007-10-05 12:14:53 · 1 answers · asked by Dancing girl.[: 2 in Chemistry

Last Math problem I'm struggling with.....

Solve and check your answers.

-4(2x - 3) = -8x + 5

2007-10-05 12:12:11 · 7 answers · asked by Anonymous in Mathematics

2007-10-05 12:10:49 · 3 answers · asked by Anonymous in Chemistry

Help!
Solve the problem and check your answers.

6x - 1/5 - 2x/3 = 3


(The way this is written is in fractions. The top 6x minus 1 over bottom number 5 minus top number 2x over bottom number 3 equals 3)

2007-10-05 12:09:41 · 7 answers · asked by Anonymous in Mathematics

2007-10-05 12:08:21 · 7 answers · asked by Payam 1 in Medicine

are the following solutions undersaturated, saturated, or oversaturated?

1. 20 grams of NaCl/100 grams of water at 20ºC.


2. 100 grams of glucose/100 grams H2O at 20ºC.


3. 100 grams of Na3PO4/100 grams of water at 80ºC.

2007-10-05 12:07:03 · 2 answers · asked by blueeyegreen 1 in Chemistry

I'm in pre calc, and we're reviewing algebra II right now. I'm having trouble with a wksht problem (factoring):
R ^(2/3) - R ^(1/3) - 20 = 0

please don't just give me the answer! give me a little explanation. thanks!

2007-10-05 12:06:55 · 4 answers · asked by Michelle 2 in Mathematics

Find the area of the segment of the circle shaded in blue. The radius of the circle is 20 units and the base of the triangle is 24 units. Use pi = 3.14 and round your answers to the nearest hundredth.
Show your work for credit.

http://i101.photobucket.com/albums/m53/yoobritt/06_06_18.gif

2007-10-05 12:05:34 · 4 answers · asked by Anonymous in Mathematics

Somebody help me out with this Math problem?

Solve for x and check your answer.

9x + 7 = 5x – 3

2007-10-05 12:05:14 · 8 answers · asked by Anonymous in Mathematics

Anyone have any good ideas Where I can base the science experiment around my snake?

2007-10-05 12:03:02 · 2 answers · asked by Anonymous in Botany

im just curious... dang.

2007-10-05 12:02:29 · 7 answers · asked by dragonash36 1 in Other - Science

I like doing math problems, I find physics interesting though I am better at numbers, I like to write code, I don't like to work with hardware. I am not a computer expert. I would like to teach someday.

To be honest, I don't know what the "right" major for me is, but based on all the information I have given you, What major combines all those things? Thanks for helping me decide!

2007-10-05 11:59:48 · 7 answers · asked by superman 4 in Engineering

My science teacher made us do an experiment where we added liver to hydrogen peroxide. Now I have to figure out a way to capture the Oxygen put off by the chemical reaction. I don't actually have capture the gas just say how I would... There are no limits in materials but I have to capture PURE oxygen (no air) and cannot use a balloon! PLEASE HELP ME SCIENTISTS AND OTHER SMART PEOPLE!!!!

2007-10-05 11:59:11 · 3 answers · asked by Anonymous in Chemistry