Science & Mathematics - 23 October 2007

need help with this.
i can do this in my head.
but teacher want us to show work.
need to find two numbers.
the long way. show me how oyu got it.

2007-10-23 13:30:31 · 4 answers · asked by bonecca133 1 in Mathematics

1.Translate the following chemical equation into a sentence.
CH4+2O2--->CO2+2H2O

2.Perform the following calculations andwrite the answer with the correct number of significant figures.
a. 12.65m times 42.1m
b. 3.7g/1.083cm*3

2007-10-23 13:29:43 · 1 answers · asked by Anonymous in Chemistry

6x-2=x+1

please help me

2007-10-23 13:29:10 · 5 answers · asked by Anonymous in Mathematics

2007-10-23 13:28:32 · 3 answers · asked by michaela. 2 in Biology

Please help me on these! ive been stuck on them all week! Please show me how they are done too so i can learn too.

1. A child was born in Boston, Massachuesettes, to parents who were also born in boston. The child is not automatically a US citizen, how is this possible?


2.What is the 99th letter in the pattern below?

ABBCCCDDDDEEEEE...


3. In how many ways can you make change for $20 using only quarters and dimes, with atleast one of each coin used?


4. The number 1961 has rational symmetry, because the number looks the same when turned 180 degrees, find the next greatest number that also has this feature.


5. Show how half of 13 can possible be eight.

6.How mcuh money would you make in 8 days if you made 8 dollars everytime the hands of a clock formed a 90 degree angle?

Please try and answer as many as possible and THANK YOU SO MUCH!!!

2007-10-23 13:28:03 · 6 answers · asked by Anonymous in Mathematics

What magnification number (4x, 40x, 100x ect) do professors usually show when showing cells in a microscope?

2007-10-23 13:27:18 · 3 answers · asked by dnice 1 in Biology

if x^2 - 13x + 42 = (x + A)(x + B), then A + B =


Ohh wow.
can someone explain

this is what I started doing

x^2-13x+42=(x- )(x+ )

2007-10-23 13:23:34 · 4 answers · asked by Anonymous in Mathematics

from 82 to 69

2007-10-23 13:22:29 · 10 answers · asked by LOU C 1 in Mathematics

Can anybody answer this? I really need an answer ASAP...I will greatly appreciate it...if you can show how you got your answer that would be great also....thanks so much!!!

(2x^3-3x^2-2x+1) / (x^2+1)

2007-10-23 13:21:47 · 1 answers · asked by ☺♠JonasJay♫♦ 5 in Mathematics

answer that question for me

2007-10-23 13:21:22 · 5 answers · asked by Anonymous in Mathematics

2007-10-23 13:21:15 · 11 answers · asked by Anonymous in Biology

I would greatly appriciate it if someone could and solve and explain the following problem so I can use it as an example to do all the rest.


Use the diagram to answer these questions.
(diagram link: http://i20.tinypic.com/2ywcmtl.jpg)

1. find the value of x
2. find the value of y
3. find the measurement of angle 1

2007-10-23 13:16:20 · 4 answers · asked by vintage. 2 in Mathematics

2007-10-23 13:14:26 · 11 answers · asked by foxy_gurl_20032002 1 in Mathematics

need this answer as sooon as possible like...by tomorrow

2007-10-23 13:13:09 · 5 answers · asked by jonathan r 1 in Chemistry

A superhero flies 337 m from the top of a
tall building at an angle of 23 degrees below the
horizontal.
a) What is the horizontal component of the
superhero's displacement? Answer in units of
m.

b) What is the vertical component of the su-
perhero's displacement? Answer in units of
m.

2007-10-23 13:12:30 · 1 answers · asked by Sarah B 1 in Mathematics

2007-10-23 13:12:29 · 2 answers · asked by imagination_inevitable 1 in Mathematics

These are my notes which I had to make myself from my textbook. See, my teacher DOES NOT teach us anything, and if we ask him a question he calls us idiots. Can someone make it simple for me to understand? Test tomorrow by the way.

-The fluid-mosaic model is a description of cell membrane structure in which phospholipids form a bilayer that has a fluid consistency and is studded with protein molecules.
-Lipids do not dissolve in water, thus causing a border around the cell. The edges of the border defines and contains the fluid lipid layer.
-Biochemists and electron microscopists gave researched intently on the subject and they have concluded that the cell membrane all contains a mosaic of different components scattered throughout it.
-For example, numerous protein molecules stud the phospholipid bilayer, and the phospholipid molecules and some of the proteins can drift sideways in the bilayer. This supports the idea that the phospholipid bilayer has a fluid consistency.

2007-10-23 13:10:50 · 5 answers · asked by Anonymous in Biology

Anyone able to help me with the following proof?

If f is a continuous function on a compact set, show that either f has a zero or f is bounded away from zero.

thanks

2007-10-23 13:09:22 · 1 answers · asked by mathishard31415 1 in Mathematics

This was a problem posted by someone else.
int x * e^(x^3) dx

does this even work? please explain to me...

2007-10-23 13:06:18 · 3 answers · asked by PeteDawg 2 in Mathematics

1.Polydactyly is a dominat disorder (F) causing people to have 6 digits on the hands and feet.If a heterozygous man and a homozygous normal woman have children,what is the chance they will have long tailed kittens?

2007-10-23 13:04:14 · 3 answers · asked by Tori cakes 1 in Biology

I had a drug test and they said thc was found in my system I didnt smoke and jail and loosing my job are on the line iver been clean 3 years how can this happen

2007-10-23 13:04:12 · 4 answers · asked by dyslexia_724 1 in Medicine

Consider the following data.

N2(g) + O2(g) 2 NO(g) H = +180.7 kJ
2 NO(g) + O2(g) 2 NO2(g) H = -113.1 kJ
2 N2O(g) 2 N2(g) + O2(g) H = -163.2 kJ

Use Hess's law to calculate H for the reaction below.

N2(g) + 2 O2(g) 2 NO2(g)
H = ____ kJ

2007-10-23 13:04:00 · 2 answers · asked by Circuiteer 1 in Chemistry

2007-10-23 13:01:49 · 3 answers · asked by gwenariel 2 in Zoology

z-(-5z-8z)

2007-10-23 12:59:58 · 5 answers · asked by hee hee hee 1 in Mathematics

I have been wanting to become involved in the neuroscience field for a long time, and am trying to find a good way to get myself set in a career for Neural engineering. (before i go any further it should be noted that i am only in 8th grade). I have been searching around, but since Neuroscience is a relatively new field, i have been studying up a bit on Neurology. If anyone has any idea on good Neuroscientific colleges (especially those highly involved in neural engineering), books/rescources, or information in general, i would be happy if you told me. This is not to be confused with neurology, the medical field of neurological diseases.

2007-10-23 12:58:01 · 1 answers · asked by dKM 2 in Other - Science

help me please thankyou

2007-10-23 12:56:33 · 9 answers · asked by Anonymous in Mathematics

2007-10-23 12:54:18 · 12 answers · asked by infectedmousepad 2 in Astronomy & Space

*Two Wheels*

One wheel turns at 33 1/3 revolutions per minute. A second wheel turns at 45 revolutions per minute. At some point in time, a mark on each wheel is at the lowest point on each wheel at the same time. What is the least number of seconds until the marks on both wheels are again both at the lowest point at the same time?

Justify your answer and show all work!

This is a problem challenge for school and it is very confusing. i have ideas of how to solve it but i'm not sure how to go about it. This is for extra credit and due tomorrow, 10/24/07, so please try and solve this as soon as you can. Thank You!!!

2007-10-23 12:53:45 · 1 answers · asked by sparkles62190 2 in Mathematics

2007-10-23 12:47:30 · 8 answers · asked by religionisforboosers 1 in Astronomy & Space

I don't understand how an object in space can accelerate. Isn't space a vacuum and therefore there would be nothing to 'push' against (no mass) so how can a object such as a spaceship create any thrust when its not necessarily pushing against any matter?

2007-10-23 12:47:30 · 5 answers · asked by Jewlz 1 in Astronomy & Space