Science & Mathematics - 3 October 2007

C.D's cost 5.89 each including tax. Felicia bought more than one half (1/2) dozen C.D's but fewer than a dozen, what was her total cost? A 30 B 50 C 80 D 100

2007-10-03 12:36:02 · 4 answers · asked by bodigger 1 in Mathematics

then x is equal to???


can someone tell me how to solve this problem? I am really confused.

2007-10-03 12:31:23 · 14 answers · asked by «~♥Emelie's Momma♥~» 2 in Mathematics

2007-10-03 12:27:46 · 12 answers · asked by fpx 1 in Mathematics

I need h ' (-3).

2007-10-03 12:24:14 · 2 answers · asked by jtaylor 1 in Mathematics

What is the specific, most common tree that is in the Maple family and that is located in New England

2007-10-03 12:21:23 · 3 answers · asked by WhollyBabble 1 in Botany

it says that the cornea has unmylenated nerve endings.. and that The cornea is very sensitive to pain because of the ciliary nerves that run just underneath the endothelium.
... does that mean that it's made of nerve cells or that it just have nerves that run through it??

2007-10-03 12:18:22 · 2 answers · asked by melloyellow 1 in Biology

2007-10-03 12:13:29 · 7 answers · asked by lord_andys_new_id 1 in Physics

Find the range of x/√(x^2-x-2) without using calculator.

2007-10-03 12:12:33 · 1 answers · asked by sahsjing 7 in Mathematics

I just want to know the exact number of neutrons in a normal Neon atom, not an isotope or ion.

2007-10-03 12:10:18 · 5 answers · asked by Glen L 1 in Chemistry

2007-10-03 12:10:12 · 1 answers · asked by Anonymous in Biology

2007-10-03 12:08:57 · 4 answers · asked by Anonymous in Chemistry

Does anyone know how one could make a Piezoelectricity Science Fair Project. I have a few ideas. For example, I could measure how "conductive" the crystal would get that I would use as I exert more pressure on it. I could see if there's some sort trend, but does anyone know which crystals I would have to use? Are there any that would be cheap to get, but would work very well? Thanks for any help!

2007-10-03 12:08:35 · 4 answers · asked by magixter 2 in Physics

An airplane pilot wishes to fly due west. A wind of 90.0 km/h is blowing toward the south.

If the airspeed of the plane (its speed in still air) is 310.0 km/h, in which direction should the pilot head?
What is the speed of the plane over the ground?

2007-10-03 12:07:23 · 1 answers · asked by Anonymous in Physics

there are several problems, if anyone can help with all or any that would be greatly appreciated!
1. x^3-3x^2-x+3
2.x^6-2x^3+1
3. {x+4/x^2-x-2} - { 2x+3/x^2+2x-8}
4.(1/2 + sq root of 3i/2)^2
5.x^4+13x^2+36
6.2 - sq root of 5/ 2 + 3 sq root 5
7. (9/8)^3/2
8. -6/x+4
9. How many ounces of pure water should be added to 20 oz. of a 40% solution of muriatic acid to obtain a 30% solution of muriatic acid?
10. A motorboat maintained a constant speed of 15 mph relative to the water in going 10 miles upstream and than returning. the total time for the trip was 1.5 hours. use this info. to find the speed of the current.
11. In the 1984 olympics, Carl Lewis won the gold metal in the 100 meter race w/ a time of 9.99 seconds. 1896, Thomas Burke won the gold metal in the 100 meter race in 12.0 seconds. If they ran the same race, repeating their respective times, by how many meters would Lewis beat Burke?


THANK YOU GUYS SOOO MUCH!!!!

2007-10-03 12:06:57 · 3 answers · asked by shortycowgrl101 1 in Mathematics

Write the equation of the indicated sphere

Center (-2,1,-5)
radius sqrt(7)

Any help would greaty be appreciated thanks

2007-10-03 12:03:54 · 3 answers · asked by chris s 1 in Mathematics

Member since: May 01, 2006
Total points: 171 (Level 1)
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Absolutely
S What chemical reaction does iodine to the starch in foods that give sit its blue-black color??
I know its something about the iodine fitting inside of the amylose molecules but after tht wat happens??Please help me ty

2007-10-03 12:02:02 · 2 answers · asked by Anonymous in Chemistry

A)Neglecting air friction, what initial velocity would achieve this result?


B)Using the initial velocity found in item a above, determine the maximum height reached by the gold ball.


please help me genius people! i'll appreciate it forever!!

2007-10-03 12:01:44 · 1 answers · asked by a idiot with dreams of wiseman 1 in Physics

OK call me stuppy but is 1/3 equal to 30%? I am asking this in reference to money.

2007-10-03 12:00:39 · 3 answers · asked by mdjgirl7 4 in Mathematics

true or false " all oxygen atoms have the same mass." if false why?

2007-10-03 11:59:53 · 6 answers · asked by mon_luvs_mcr 1 in Astronomy & Space

homogeneous mixtures and heterogeneous mixtures?
and is sand water mixture an example of heterogeneous mixture and is salt water a homogeneous mixture?

i keep on reading about it, but im still kinda lost....i have a test tomorrow and i need help =(

2007-10-03 11:58:06 · 2 answers · asked by Anonymous in Chemistry

One measures tensile strength of a material. What is the difference between that and tensile modulus? One measures flexural strength. What is the difference between that and flexural modulus? Tell me the difference in measurements and physical significances.

2007-10-03 11:56:28 · 5 answers · asked by steve_geo1 7 in Engineering

2007-10-03 11:56:05 · 3 answers · asked by SWEETLILOUTLAW 1 in Mathematics

2007-10-03 11:55:40 · 20 answers · asked by Anonymous in Astronomy & Space

Im doing a speecha and i need some answers. quick smart.

2007-10-03 11:54:51 · 4 answers · asked by Anonymous in Zoology

that allow them to be substituted for eachother...
and
what properties make them different from eachother?

2007-10-03 11:54:50 · 1 answers · asked by Tr4ck4Inc@ 2 in Chemistry

Two vectors have their tails connected and their lengths fixed. If the angle between them is now varied,.....
which of the following is true?

i. The magnitude of the dot product is minimized when the vectors are perpendicular.
ii The magnitude of the dot product is maximized when they are perpendicular.
iii Each will always have a component lying along the other.

a.) i only
b.) ii only
c.) iii only
d.) i and ii only
e.) i and iii only
f.) i, ii, and iii

2007-10-03 11:51:46 · 2 answers · asked by Alex M 1 in Physics

a voltmeter has _______ resistance in its coil

2007-10-03 11:48:42 · 2 answers · asked by gheigh 1 in Engineering

I know the answer to this, it's not homework, but here's the problem: you have 4 fours. You can use them any way you want, as part of a fraction, squared, cubed, anything. You can use numbers like 44, which counts for 2 fours. You can use as many operations as you'd like, but you have no other numbers but 4. (Excluding exponents) Make it so that you find a way to use these in equations that equal the numbers 1-20. It's harder than it looks!

2007-10-03 11:46:13 · 6 answers · asked by Writer Girl AKA Care 2 in Mathematics

Mettalic Bonding
Covalent Bonding
Ionic (Electrovalent) Bonding


PLEASE PLEASE HELP!!!!

2007-10-03 11:46:12 · 1 answers · asked by emoteddybear02 2 in Chemistry

heat, sound, or mechanical energy? (you can use more than 1)

2007-10-03 11:41:14 · 3 answers · asked by loanshark50 2 in Other - Science