Science & Mathematics - 15 December 2007

Pleasse.
:)

2007-12-15 12:31:39 · 12 answers · asked by Alexa♥ 3 in Mathematics

absolute value inequality

let me use " / " for the absolute value symbol

-2/4x + 3/ < -4

if you could help and explain a little on how you did it, that would be greatly appreciated.
Thank you

2007-12-15 12:30:06 · 6 answers · asked by Americanito 1 in Mathematics

How many particles are in a 91.0 gram sample of potassium carbonate?

2007-12-15 12:27:41 · 1 answers · asked by Kataya B 1 in Chemistry

Im doing a science fair project on different concentrations of a growth hormone on plants.
I have 15 plants in one group and 15 in another.
I measure the height and number of leaves.
Now the problem is im not certain how to compare the two groups to another. Can you average the height and leaves of one group and compare it to the other? but the problem with that is that all plants genetically differentiate in the height and number of leaves,right? so what can i do?

2007-12-15 12:25:51 · 2 answers · asked by Anonymous in Botany

27^x-1 = 9^2x

25^2-c = 125^2c-4

16^2p+1 = 8^3p+1

(-8)^1-2x = (-32)^1-x

2007-12-15 12:24:11 · 1 answers · asked by Anonymous in Mathematics

9x10¯4 = (3.5x10¯4)Q + 5X10¯3 / Q +5x10¯3

2007-12-15 12:21:38 · 2 answers · asked by Architect Student 1 in Mathematics

a)5^2n+1 = 1 / 125

b)1 / 256 = 2^2-5w

c)3^x-1 = 1 / 81

d) 6^3x-7 = 1 / 6

Thank you

2007-12-15 12:20:43 · 1 answers · asked by Anonymous in Mathematics

2007-12-15 12:18:45 · 3 answers · asked by Anonymous in Chemistry

A charged particle is accelerated from rest through a potential difference of 950 V and it attains a final speed of 1.80x10^7 m/s. What is particle's charge to mass ratio?

2007-12-15 12:17:44 · 1 answers · asked by kAMI kHAN 1 in Physics

1/2 x^2 - y =4

x^2 = 36 - 9y^2

2007-12-15 12:15:45 · 2 answers · asked by jamie d 2 in Mathematics

2007-12-15 12:13:20 · 2 answers · asked by Anonymous in Biology

...says that the configuration 1s^2, 2s^2, 2p^5, 3s^2, 4p^1 represents an excited atom. Please explain!

2007-12-15 12:12:36 · 3 answers · asked by Anonymous in Chemistry

2007-12-15 12:11:52 · 3 answers · asked by ~~xx{Stelth[k9]}xx~~ 1 in Earth Sciences & Geology

2007-12-15 12:10:23 · 3 answers · asked by Anonymous in Weather

2007-12-15 12:10:12 · 18 answers · asked by Albinoballs 5 in Earth Sciences & Geology

5. Converging trade winds produce a calm region called _____________. (Points: 3)
horse latitudes
doldrums
trade winds
westerlies

2007-12-15 12:06:13 · 2 answers · asked by Jackie 2 in Earth Sciences & Geology

2007-12-15 12:05:13 · 3 answers · asked by Denise 1 in Zoology

(Come on people, you don't need details.)

2007-12-15 12:04:45 · 6 answers · asked by snarky_sheep 1 in Biology

Is it the abscence of cortical activity? or is another measure used.

I'm writing a law paper about end of life issues, and I'm trying to get a feel for what is considered 'death'.

2007-12-15 12:04:41 · 7 answers · asked by freshbliss 6 in Medicine

Solve for x:
1. 2xy^2 - y^2 - (1 - 3y) = x
2. x - y^2 + x(2zy^2 + 2y) = xz^2 + z

These are really impossble for me to figure out. I keep getting stuck on both of these problems. For #1, I set one side equal to zero but I got stuck on the fourth line. For #2, I again set one side equal to zero but could not factor the expression on one side.

Thanks for the help in advance! :)

2007-12-15 12:03:10 · 5 answers · asked by A V 2 in Mathematics

This year winter doesnt seem like winter..and why would they change the time to 1 hour faster..? if winter is slow..then they should change the time 1 hour slower to make it catch up to winter?? what is the reason why?? its still hot and warm in california..this year is way different..i think thats the reason why its going so fast..and winter is so late..

2007-12-15 11:57:18 · 6 answers · asked by Kelly X 1 in Weather

Example: After humans drifted from their closest relatives, chimpanzees, the males began loosing the baculum, and started depending on blood pressure to get an erection.
According to Richard Dawkins, this was due to a "sexual selection" from females because an erection having an hydraulic mechanism in the penis would mean that the individual has good blood pressure, and doesn't have stress or other mental issues. How did early female humans "chose" the me until they lost the baculum, without showing purpose (remember that evolution is not driven by purpose)?

2007-12-15 11:55:43 · 3 answers · asked by Optimus Prime 4 in Biology

tion? explain

2007-12-15 11:53:01 · 5 answers · asked by CheetosMonster00 1 in Earth Sciences & Geology

2007-12-15 11:51:32 · 2 answers · asked by cutie456768 1 in Earth Sciences & Geology

2007-12-15 11:47:07 · 2 answers · asked by CheetosMonster00 1 in Earth Sciences & Geology

solve the following:(i) 4 sin2X( sinX-1)=0
ii) sin2X =-1

2007-12-15 11:46:28 · 4 answers · asked by D R 1 in Mathematics

how do you find a general quadratic function g(x) whose derivative g'(x)=5x+7?

2007-12-15 11:44:43 · 10 answers · asked by Haya 1 in Mathematics

Find the distance and slope
(5, -4) and (-1, 1)

Find maximum or minimum of the function
y= 3-5x +x^2

2007-12-15 11:44:07 · 5 answers · asked by jamie d 2 in Mathematics

If the average person drinks 8, (8oz) glasses of water per day, a person who drinks 12.8 oz of water after a morning exercise session has consumed what fraction of the daily average?

2007-12-15 11:40:00 · 19 answers · asked by sunmoonstars12345 1 in Mathematics

2007-12-15 11:34:32 · 10 answers · asked by Anonymous in Agriculture