Science & Mathematics - 29 January 2007

Arthur can do a job in 30 min, Bonnie can do it in 40 min, and Claire can do it in 60 min. How long will it take them to complete the job if they work together?

2007-01-29 10:17:46 · 3 answers · asked by mike 1 in Mathematics

2007-01-29 10:14:15 · 5 answers · asked by Anonymous in Mathematics

2007-01-29 10:14:15 · 2 answers · asked by dokcuba 1 in Medicine

2007-01-29 10:13:19 · 5 answers · asked by Ehmmmmma 1 in Astronomy & Space

I went to my doctor today because my other doctor referred me to him. He goes " it's going to cost 900 dollars with a 300 dollar replacement fee if you lose it. I couldn't help myself think that that is the most ridicolous thing I have ever heard. I understand it's a custom fitted contact lenses, but it will only last about 6 months he said.so 1800 for a year? gimme a break. I havent this bad of price gauging from a doctor. We all know it goes on but come on 900 bucks for synergeye contacts?

2007-01-29 10:11:44 · 7 answers · asked by italyazzurre44 2 in Medicine

2007-01-29 10:10:31 · 8 answers · asked by Anonymous in Mathematics

LM=3, MN=7, and LN= 10. L, M, N are three points of a line. The coordinate of L is -2, the coordinate of L is greater than the coordinate of M. Find the coordinates of M and N.

Also another one. it doesnt say anything it just says write an algebraic expression for Line PA and it has a like with 3 points -4, 1, 2 and it says nothing about PA

2007-01-29 10:10:25 · 1 answers · asked by Anonymous in Mathematics

I gave a reading to a woman in Guatamala. I saw several things conected to a friend of hers in Texas. I saw a bag of money, and a box of bullitts with MAX 9 marked on the bag and box. I saw a gas can sitting next to a shovel nearby. When I tried to dig deeper, I saw a service shirt with MAX 9 on the front. I believe that there is great danger here. Please help.

2007-01-29 10:08:08 · 7 answers · asked by the duke 4 in Paranormal Phenomena

Llong is 5 ft tall and is standing in the light of a 15-ft lampose. Her shadow is 4 ft long. If she walks 1 ft farther away from the lampost, by how much will her shadow lengthen?

2007-01-29 10:07:50 · 3 answers · asked by ilikesnow 2 in Mathematics

2007-01-29 10:07:34 · 6 answers · asked by Jerry 2 in Earth Sciences & Geology

2007-01-29 10:05:09 · 6 answers · asked by Anonymous in Astronomy & Space

Given the following data:


Fe3O4 + CO → 3FeO + CO2 DH = +38 kJ


2Fe3O4 + CO2 → 3Fe2O3 + CO DH = +59 kJ


Fe2O3 + 3CO → 2Fe + 3CO2 DH = −28 kJ




Calculate DH for the reaction


FeO + CO → Fe + CO2


Enter a numeric answer only.

2007-01-29 10:04:34 · 1 answers · asked by Marty Kay 2 in Chemistry

You may think im crazy. I saw a weird Diamond shaped red aircraft flying VERY slowly over my house. Under it was a giant Smaller diamond symbol with a square in it. Did you see it? I was in NJ at the time.

2007-01-29 10:03:36 · 3 answers · asked by kyleee d 1 in Astronomy & Space

The weather where I live has been very unusual this winter. Global warming, climate change, an off year -- what do you think?

2007-01-29 10:02:40 · 15 answers · asked by Anonymous in Weather

2. Is it possible to have 3/4 of the students above the median test score? explain.
3. The guard rail or strip of ground bet. the traffic lanes of a freeway is called the median. Explain why this is an appropriate word.

have an answers already but i just want to make it sure that am i right coz i need more info to understood. tnx

2007-01-29 10:02:17 · 7 answers · asked by chaunceyd06 1 in Mathematics

Second problems that I need help with -- How do you do a math problem like:
20% of ____ =15?

Thank you in advanced!

2007-01-29 10:01:01 · 9 answers · asked by Anonymous in Mathematics

as I was ripping my dads jade to shreds, I wondered if it could feel the abuse. They say plants grow faster when you talk to them so why wouldn't they have feelings too?

2007-01-29 10:00:33 · 5 answers · asked by Anonymous in Botany

I have a friend who wants to use this to protect finger nails.

2007-01-29 09:58:59 · 2 answers · asked by miss tique 3 in Chemistry

One breed of pigs and one breed of sheep share a name. The pig is black with a white belt over the shoulder. The sheep is a meat type and is white with black legs and face. What is the breed?

Please help me out with this! I've been searching everywhere and can't find it! Please also tell the website where you found it.

2007-01-29 09:58:27 · 2 answers · asked by mighty_power7 7 in Zoology

Help please!!

2007-01-29 09:57:28 · 7 answers · asked by Dave 1 in Mathematics

A) 0
b)1
c) identity
d) no solution

2007-01-29 09:55:32 · 9 answers · asked by Dave 1 in Mathematics

....would you be scared or excited?

By contact, I mean, the receipt of a message or something like that - not evidence of an imminent invasion.

I'd be soooooooo excited.

2007-01-29 09:53:55 · 14 answers · asked by Hello Dave 6 in Astronomy & Space

A casino plans to redecorate its courtyard and the plans include a large marble sculptureof a six sisded die. The sculpture will be 3 meters tall. The density of marble is 2700 kg/m3 and the crushing strength of marble is 7734/kg/m2. Find the pressure on the bottom face of the sculpture. What problem does your answer pose in regards to the feasibility of the sculpture?

2007-01-29 09:53:43 · 2 answers · asked by Eugene D 1 in Mathematics

It is known that electromagnetic radiation doesn't need a medium through which to travel. How can you provethis fact?

Please answer as soon a possible. thanks so much!

2007-01-29 09:52:04 · 4 answers · asked by Anonymous in Physics

It is pretty obvious that there are similarities between nature and ourselves and the universe. For example..Our lungs our similar to the shape of a tree, Our viens are like the rivers and valleys seen from space. Well, I believe that when the big bang happened, so to speak, we are in part of a huge pattern. Like that of a snowflake. They say we are composed of everything which is part of the universe and the elements within us are shared/common within stars and planets. Well when the big bang happened it reacted like a snowflake freezing. So are our elements and presence on the earth mirrored with 8 or 10 other fractions? When you look at nature it is a big pattern and we are part of that pattern. Does anyone else see it this way?

2007-01-29 09:50:40 · 13 answers · asked by Jason 2 in Astronomy & Space

A car accelerates from 0mph to 35 mph. Its velocity at time t is v(t)=5t mph where t is in seconds. Use an integral to find the total distance in miles it travels during its acceleration. (Hint: work with seconds not hours.)

it wants miles per second by the way


thanx any help is surely appreciated

2007-01-29 09:50:07 · 7 answers · asked by crzylaker 2 in Mathematics

Before leaving the park, Samin and JoAnna walked through the zoo. In one enclosure, they saw a mixture of giraffes and ostriches.

After they had left the zoo, Samin spoke to JoAnna.

Samin: Did you count the giraffes and ostriches?

JoAnna: No, how many were there?

Sanub: You figure it out Altogether they had 30 eyes and 44 feet.

JoAnna's first "aha!" was to realize that thirty eyes meant 15 animals.

Can you figure it out how many of each animaly were there?

What's the answer, and how did you get it?

2007-01-29 09:50:07 · 5 answers · asked by echo 5 in Mathematics

I'm in tenth grade chemistry and I'm trying to find it's molar mass and chemical formula.

2007-01-29 09:49:24 · 5 answers · asked by chjuem 1 in Chemistry

http://i134.photobucket.com/albums/q103/thepresident022/Math01.jpg

There it is...I'm so confused...I thought the answer was one, but apparently it's not. Help!

2007-01-29 09:49:17 · 4 answers · asked by Burnt Toast 1 in Mathematics

If you can please tell me how they are broken down!

2007-01-29 09:48:14 · 3 answers · asked by Anonymous in Medicine