Science & Mathematics - 8 September 2007

if something was $275
but went on sale for $195
what percent reduction is this? (what percentage
was taken away)

2007-09-08 09:58:13 · 4 answers · asked by Anonymous in Mathematics

2007-09-08 09:57:43 · 10 answers · asked by Anonymous in Astronomy & Space

2007-09-08 09:54:48 · 2 answers · asked by cutiee pie 1 in Chemistry

2007-09-08 09:52:09 · 2 answers · asked by cutiee pie 1 in Chemistry

2007-09-08 09:50:29 · 6 answers · asked by satishudhani 1 in Mathematics

Meaning 2 to the power of 3/2

2007-09-08 09:46:41 · 9 answers · asked by Bob Dower 2 in Mathematics

Assume that a 10X objective has a field diameter of 1.0mm. What would be the estimated field diameter of a 50X objective, in MICROmeters?

I would appreciate any help...thanks :)

2007-09-08 09:42:37 · 1 answers · asked by Pooh 4 in Mathematics

please help with explanantion thanks in advance

2007-09-08 09:42:27 · 2 answers · asked by master c 1 in Mathematics

2007-09-08 09:37:42 · 5 answers · asked by Anonymous in Physics

im having trouble with this question:

what is the hybridization of the carbon in acetonitrile?
how do i go about finding this?

H-C= N

there are 3 bonds between C & N.


THANKs

2007-09-08 09:37:05 · 1 answers · asked by Velvet - joux 3 in Chemistry

find the function (f . g)(3) (the dot indicates multiplying f and g

2007-09-08 09:35:57 · 3 answers · asked by Nanna2 1 in Mathematics

I am having a few problems, I know the answers from plugging them in, just dont know how to find them by working them out. could you demonstrate the proper ways to work them?

1a,
2(1+x)=3x
X=2

1b,
(x+1)(x-1)=x^2-x
x=1

1c,
(x+1)^2=x^2
x=-1/2

your help will be appreciated

2007-09-08 09:32:39 · 12 answers · asked by Anonymous in Mathematics

A jet spends 1 hour and 15 minutes flying passengers 215 mile from Washington, D.C, to Newark, New Jersey. How many miles per minutes and miles per hour is the jet traveling?

Study this problem. To find the solution for this problem, you must convert measurements from one unit to another. What is the ratio showing how fast the jet carries passengers between Washington, D.C, and Newark, New Jersey? State the time in the denominator as a decimal.

CAN SOMEONE ANSWER THIS ONE FOR ME? PLEASE!!!!!!!!!!!

2007-09-08 09:32:23 · 2 answers · asked by Kandy 2 in Mathematics

1. [2e^(-x) - xe^(-x)] / (1-x^2) > 0

2. (4x + 1)^(1/3) + (4/3)x (4x + 1)^(-2/3) = 0

your assistance would be greatly apprieciated and the winner or right answer will be awarded my ten points. thanks and good luck!!

2007-09-08 09:31:37 · 3 answers · asked by Uriel 3 in Mathematics

My grade 10 science teacher assigned us to do all of the elements from hydrogen-argon... ex: hydrogen would be 1S1, and helium would be 1S2, and lithium is 1s2 2s1. (those are the ones that she gave the answers to)

I understand that the first number is the number of energy levels, the letter is for the orbital shape and the second number is the number of electrons.... but i have no idea how i am supposed to know what orbital shape is what element?

2007-09-08 09:30:15 · 3 answers · asked by Carly R 1 in Chemistry

one rectangular box is 30cm long, 15 cm wide, and 10cm deep . A second rectangular box is 25 cm long ,16 cm wide , and 15 cm deep . which box has the larger volume?

2007-09-08 09:28:33 · 12 answers · asked by hi ! (: 3 in Mathematics

please help with little explaination thanks in adavance

2007-09-08 09:24:58 · 9 answers · asked by master c 1 in Mathematics

u would say quarks,leptons????
if n even if not so then explain what is the particles within electron whose name u mention is further made up of?

IS IT so that all subatomic particles like electrons ,protons and neutrons are energy packets,,if so can we say that MATTER AND ANTIMATTER are volatile forms of energy?

please give an explainatory and satisfying answer to all the above questions!!!-
plz answer fast!

2007-09-08 09:23:50 · 9 answers · asked by Swapnil B 2 in Physics

1. Vector V1 is 8.66 units long and points along the negative x axis. Vector V2 is 5.31 units long and points at +55.0° to the +x axis.

(a) What are the x and y components of each vector?
V1x =
V1y =
V2x =
V2y =

(b) Determine the sum V1 + V2.

Magnitude=.......

Direction=........° (counterclockwise from the +x axis is positive)

Please help me to do this problem..i really don't get it Thanks :))))))

2007-09-08 09:23:38 · 2 answers · asked by Nikita 1 in Physics

2007-09-08 09:19:55 · 4 answers · asked by sdt3 1 in Chemistry

2007-09-08 09:19:33 · 4 answers · asked by Anonymous in Mathematics

the paper says

Translate the verbal phrase into an expression

1. 8 more than a number x
2. the product of 6 and a number y
3. 1/2 of a number m





i erally dont understand this
plz help

2007-09-08 09:18:49 · 19 answers · asked by rmk_12795 2 in Mathematics

I remember a saying that ( it happens so rare like a rooster's egg ) - I wonder how true is that?

2007-09-08 09:17:20 · 7 answers · asked by Anonymous in Zoology

what is 4/3 x pi x 15³?

2007-09-08 09:16:39 · 4 answers · asked by A. Powell 2 in Mathematics

im terrible in chemistry.also; atoma are made of mostly what? what would be the charge of the nucleus? what 2 devices are used to see atoms? and what is the gold-foil experiment rutheford performed? i know thats a lot sorry but i need help

2007-09-08 09:14:43 · 3 answers · asked by Anonymous in Chemistry

2007-09-08 09:10:36 · 13 answers · asked by Anonymous in Astronomy & Space

I had one in my bathroom sink last night and couldn't even use the toilet all night. It's eyes were out on stalks(and so were mine) AAHHHH! Even thinking about it makes me cringe. Then you know what's next? Those dangling daddy long legs. Are they getting to you as well?

2007-09-08 09:04:32 · 30 answers · asked by Anonymous in Zoology

Hello! Does anyone have any ideas as to what I could compare a cell to? For example, I could compare a cell to a computer--
the mitochondria is the power supply, and the nucleus would be the motherboard.

2007-09-08 09:04:22 · 4 answers · asked by Anonymous in Biology

2007-09-08 09:03:59 · 10 answers · asked by maxey_mariah 1 in Mathematics

2007-09-08 09:03:35 · 4 answers · asked by Chuchie 1 in Zoology