Science & Mathematics - 30 November 2007

in a group of 40 syudents,all study mathematics, 28 do biology and mathematics, 20 do geography and mathemeatics, x students study alll 3 subjects.

(a) determine the amount that does all 3 subjects

2007-11-30 11:53:51 · 3 answers · asked by baby 1 in Mathematics

Y is directly proportional to X. I searched all the fonts and symbols....yet to find it . The quickest way is to ask all the smart friends from all corners of the earth. Thanks to you all.

2007-11-30 11:53:15 · 10 answers · asked by teach1inch thick 1 in Mathematics

If you could leave some sites that would be great.
although, telling me off the bat is also great. ^-^
thanks!

2007-11-30 11:51:33 · 2 answers · asked by Core 2 in Earth Sciences & Geology

it says solve each compound equality. State the solution set using interval notation and graph it

2007-11-30 11:50:11 · 5 answers · asked by shelah v 1 in Chemistry

PLEASE HELP ME WITH MY HOMEWORK I SERIOUSLY DONT GET IT. please show ur work :D

Pierre was born in the twentieth century and will be x years old in the year x2(x to the second power). In what year was Pierre Born?

2007-11-30 11:49:10 · 5 answers · asked by Anonymous in Mathematics

Discribe the geographic prosseces that cause melting, uplifting, sediments, weathering, cementaiton and erosion?

2007-11-30 11:45:18 · 7 answers · asked by Anonymous in Earth Sciences & Geology

some kids at my school are said that scientist are saying that the Earth's poles are supposed to switch or something.. idkk.

2007-11-30 11:39:08 · 14 answers · asked by Anonymous in Earth Sciences & Geology

This is to estimate freeze time required for backyard rink

2007-11-30 11:37:34 · 2 answers · asked by yekcoh 1 in Engineering

space is black so why is the sky blue
where is the cut off betwwen the two colours

2007-11-30 11:34:01 · 5 answers · asked by Anonymous in Weather

2007-11-30 11:31:48 · 4 answers · asked by yeojstl@att.net 1 in Medicine

The blocks of paraffin wax, that can be melted later.

2007-11-30 11:25:19 · 4 answers · asked by Anonymous in Chemistry

space is black so why is the sky blue

2007-11-30 11:17:25 · 11 answers · asked by Anonymous in Astronomy & Space

2007-11-30 11:16:15 · 4 answers · asked by Anonymous in Earth Sciences & Geology

Hello and thank you for taking the time to answer my question. I have been wondering, in school we learned about the Kelvin scale right? Well they never taught me what type of temperature it measured. I mean, I know the Celsius and Fahrenheit scales measure climatic, industrial, and medical purposes but what about the Kelvin scale? What was the Kelvin scale used for, what type of temperature measurment. If you could answer that would be great!

2007-11-30 11:12:37 · 2 answers · asked by Alice C 4 in Weather

Cats always land on their feet. Toast always lands buttered side down. So if I strap a slice of toast butter side up onto a cats back, I will have created an anti gravity device, correct?

Hold onto your hat, science. I'm about to blow your f*****g mind.

2007-11-30 11:08:39 · 8 answers · asked by Anonymous in Physics

Here's the full question:

If you are on the far side of the moon you are farther away from the earth than if you are on the near side. a.) What is the difference in your true weight between standing at the nearest and farthest surface positions on the moon relative to the center of the earth?

Well I think that you need to use Fg=(Gm1m2)/r^2
but what do you do with that? Perhaps add the force of gravity of the moon and the earth together? I'm not sure what to do. Thanks for the help.

2007-11-30 11:07:52 · 1 answers · asked by Anonymous in Physics

s=-t^2+6t+5, where t is measured in seconds. Find the average velocity over the following time period. t E [2,4].

2007-11-30 11:07:03 · 4 answers · asked by Anonymous in Mathematics

Apparently the asteriod 99942 Apophis will come very close to the Earth on Friday 13th April 2029. If they have got their calculations correct it is supposed to miss us.

If they find out that they haven't, do you think anyone will bother to try and stop a catastrophic impact, or do you think they will leave it because its too expensive?

2007-11-30 11:05:55 · 15 answers · asked by footynutguy 4 in Astronomy & Space

2007-11-30 11:03:32 · 4 answers · asked by kc s 1 in Zoology

2.Convert the following fraction to equivalent fractions, each with the LCD as the common denominator: 7/3,8/6

2007-11-30 11:03:18 · 8 answers · asked by Anonymous in Mathematics

I try to figure out this problem and my whole family but we think its impossible. my whole class asked my teacher and she said ill give u the weekend to firgure out.

When open the website look at number 4. Also remember it says 4 DIFFERENT DIGITS

http://img152.imageshack.us/my.php?image=njmath22fu7.jpg

2007-11-30 11:00:18 · 14 answers · asked by MentoKings10 2 in Mathematics

If a car speeding at 100mph on a highway crashes into the rear end of a car traveling at 60mph, would the impact be the same (or greater) as a car at 40 crashing into a stationary car? What does physics have to say about the difference? Thanks to all in advance for indulging me.

2007-11-30 10:57:33 · 3 answers · asked by eugmir 2 in Physics

What percentage of pheromones are added to got2b magnetik pomade? do pheromones really work? how long do they last?

2007-11-30 10:57:27 · 1 answers · asked by chris g 1 in Medicine

2007-11-30 10:53:13 · 6 answers · asked by dizkneelandaway 1 in Mathematics

2007-11-30 10:53:11 · 2 answers · asked by The Exotic Dr. Congo 3 in Geography

Suppsoe that a, b, c are sides of of a triangle. Prove that:
a^2(b + c - a) + b^2(c + a - b) + c^2(a + b - c) <= 3abc

I can't seem to do this! I've tried using algebra and triangle inequality rules. Should I use trignometry?!?!

Please provide me with work and an answer.

Thanks! Merry Christmas.

2007-11-30 10:45:37 · 2 answers · asked by UnknownD 6 in Mathematics

2007-11-30 10:45:13 · 2 answers · asked by pimperboy992000 2 in Geography

2007-11-30 10:44:23 · 2 answers · asked by pimperboy992000 2 in Geography

2007-11-30 10:43:26 · 3 answers · asked by pimperboy992000 2 in Geography

explain answer

2007-11-30 10:41:15 · 7 answers · asked by Anonymous in Mathematics