Science & Mathematics - 25 October 2007

I do NOT understand how to do this.
I can't really explain how it is written, I'll do my best:

^4...square root...10^3

The solution is suppose to be 5.6234
HOW DO YOU GET THIS?

2007-10-25 16:25:11 · 2 answers · asked by DoWHATiDO 3 in Mathematics

The Question is:
What is the value of lim((x + "delta" x)^3 - x^3)/ "delta" x
if x=3
The answer is 3x^2 and thus 27.
How do you arrive at this answer? Can someone explain to me how to solve these kinds of questions?

2007-10-25 16:25:10 · 7 answers · asked by Anonymous in Mathematics

-5x + 6 <= -9 (Remember >= means greater than or equal to)

a. Solve the inequality showing all steps and

b. Describe the graph. (Guide: open or closed circle on what number, arrow to the right or left.)

2007-10-25 16:24:35 · 20 answers · asked by Anonymous in Mathematics

y= sec(tanx)

2007-10-25 16:22:40 · 1 answers · asked by Anonymous in Mathematics

2007-10-25 16:22:36 · 6 answers · asked by *shorty* 2 in Biology

2007-10-25 16:22:05 · 6 answers · asked by Chris 3 in Geography

I want to learn how to use telekinesis, or find out if i'm able to, or any other forms of psychiatric techniques. Any website were i can further my reading into this. I do believe that my mind and most likely everyones mind has the ability to predecit the future. Its crazy how every night i wake up RIGHT before something happens. For instance when i leave the tv on, the satelight resets itself, the screen will snow and make a loud noise, i wake up everynight about 5 seconds before this happens, and then go back to sleep. i do this with many other things too, for example, i just start thinkin of a phone for no reason, and out of no were it starts ringing, purely possible to be cooincidence but if not i want to know how to control theese abilities or manipulate them into others. any websites to look at?

2007-10-25 16:21:15 · 9 answers · asked by Anonymous in Parapsychology

2007-10-25 16:18:43 · 9 answers · asked by yerafdog 1 in Chemistry

currently,you have $60 and your sister has $135. You decide to save $5 of your allowance each week, while your sister decides to spend her whole allowance plus $10 each week. How long will it be before you have as much money as your sister?
1. write an equation for the model.
2.solve the equation and answer the question

2007-10-25 16:18:01 · 2 answers · asked by Anonymous in Mathematics

2007-10-25 16:15:04 · 7 answers · asked by Zetsumei Ongaku 2 in Mathematics

Has life on other planets ever been discovered?

2007-10-25 16:14:55 · 10 answers · asked by Jk 2 in Astronomy & Space

waterdissolves many ionic and molecular compounds because of its? a) ionic bonding ,B)polarity ,c)covalent bonding ,d)hydrogen bonding
I think its c

2007-10-25 16:14:44 · 6 answers · asked by Harley 1 in Biology

2007-10-25 16:14:14 · 4 answers · asked by aaaaaa a 3 in Botany

Hydrogen sulfide can be deteced at a concentration of 2.00ppb. The density of air is 1.2929 g/L

1)What is the concentation of H2S in mg/L at the detection level?

2) The lethal dose of hydrogen sulfide by inhalation for rats is 7.13×10−4g/L . What is this lethal dose in ppm?

2007-10-25 16:13:12 · 1 answers · asked by Anonymous in Chemistry

2007-10-25 16:12:39 · 5 answers · asked by whoopi cusion 1 in Biology

Locate on your body as many levers,
pulleys and pendulums as you can,
specifying what kind of machine
you think each one is.

2007-10-25 16:12:05 · 2 answers · asked by Anonymous in Other - Science

What is w (work) when 1.47 kg of H2O(liquid), initially at 25 degrees is converted into water vapour at 151 degrees against a constant external pressure of 1 atm.? Assume that the vapour behaves ideally and that the density of liquid water is 1 g/mL.


ok so I know I have to use this formula
W = -P ext (Vgas-Vliquid)

for v gas, we use v= nRT/P
but do i subtract temperatures or what? what about P ??
clue me in folks asap please!!!!!!!!

2007-10-25 16:12:04 · 1 answers · asked by Curious 1 in Chemistry

1+1 the best answer gets the points!

2007-10-25 16:11:41 · 19 answers · asked by Rob 2 in Mathematics

2007-10-25 16:05:50 · 8 answers · asked by Brandi S 1 in Weather

24 hours. I think it was hit by an asteroid. Why do you think it got so bright? Look NE tonight and see the extra star in Perseus. It is easy to see the fuzzy star in binoculars.

2007-10-25 16:04:16 · 3 answers · asked by Owl Eye 5 in Astronomy & Space

2007-10-25 16:03:39 · 2 answers · asked by Anonymous in Biology

2007-10-25 16:01:41 · 34 answers · asked by Anonymous in Paranormal Phenomena

You probably remember this item. You pull on one steel ball from one side and let it drop. When it hits the other balls ii then causes one steel ball from the other side to go.

2007-10-25 15:59:14 · 10 answers · asked by Anonymous in Engineering

answer in a non-scientist way

2007-10-25 15:58:06 · 7 answers · asked by Anonymous in Chemistry

Briefly please i am having troubles understanding this

2007-10-25 15:54:19 · 3 answers · asked by BioNeedHelpe~! 1 in Biology

Which of the following is NOT an example of an Irrational Number?

4.2

square root of 5

5.212573...

pi

2007-10-25 15:53:59 · 2 answers · asked by Anonymous in Mathematics

2007-10-25 15:53:30 · 9 answers · asked by lorrnae 3 in Earth Sciences & Geology

2007-10-25 15:53:00 · 2 answers · asked by Nicole 1 in Physics

you bought two antique lamps for the $50 each. Later you offered $60 for one and sold it. When you saw a duplicate being sold for more you changed your mind and bought it back for $70. you then sold it for $80. the first one didn't sell at all so you reduced the price by 10% below what you originally paid and managed to get rid of it. did you make or lose money on the deal and how much ??

2007-10-25 15:52:41 · 6 answers · asked by Nelson Z 1 in Mathematics

2007-10-25 15:52:14 · 3 answers · asked by Vijaya P 1 in Biology