Science & Mathematics - 12 December 2007

Thank You everyone for all the help.

Could someone walk me through how to solve this question. I know there will be many coming up on a test I have.

Miss bass wants a 79% solution of herbicide to be mixed with a solution of 62% herbicide to form 34 litersof 66% solution. How many liters of the 79% solution must she use?

Thank You so much

2007-12-12 05:09:59 · 2 answers · asked by Anonymous in Mathematics

could be considered dumb-asses

2007-12-12 05:09:37 · 16 answers · asked by Anonymous in Astronomy & Space

what is the magic force of egyptian pyramid?

2007-12-12 05:09:31 · 14 answers · asked by alexpol1385 1 in Astronomy & Space

and from some of the answers i've read seems like some off you know what you are doing, so please educate me about it

2007-12-12 05:08:49 · 7 answers · asked by G\T girl 2 in Astronomy & Space

I have to give a project about this theme, but I don't find anything. Please help me.

2007-12-12 05:07:53 · 3 answers · asked by billdokme 1 in Earth Sciences & Geology

im not in algebra but iv been learning on my own to solve small and easy algebra problems and in many problems on yahoo answers if found this sighn:^ i would like to know what it means
thank you

2007-12-12 05:06:54 · 11 answers · asked by Anonymous in Mathematics

Which container or wrapping preserves food the longest????

I need some types of brands and answers plz!!!!!

2007-12-12 05:05:14 · 3 answers · asked by Mrs.Moss 1 in Earth Sciences & Geology

I have started up a business of making box kites (see diagram included for “blue prints of a box kite). My
kites will be made of 4 “length” pieces and 8 “cross sectional pieces”.
Here are my conditions.
(1) The kite’s frame I build must be made from 6 meters of balsa wood, which costs me $4.00/m
(2) the kite’s “base” will be square
(3) I will cover the surfaces as shown on the diagram, but the red covering costs me $5.00/m2 while the
blue covering costs me $6.00/m2
I must design the kite such that I am aware of the total surface area of my kite as well as the cost of my
kite. So you will carry out 2 mathematical investigations to help me decide the optimal dimensions of the
kite so that I can (a) maximize my surface area and (ii) minimize my cost
PART A. You must decide what dimensions of the kite (length and width) will maximize the surface area
of the kite. Your solution will include (i) a clear and concise outline of what you have outlined, and (III) explain all your step

2007-12-12 05:02:15 · 2 answers · asked by Anonymous in Mathematics

far must one go to reduce the strength by 66%. (i.e., 34% of its original strength)?

2007-12-12 05:02:01 · 3 answers · asked by simonkf2002 1 in Mathematics

2007-12-12 05:01:35 · 4 answers · asked by tuthutop 2 in Other - Science

minutes after it starts cooling is given in Celsius, by
H = 20 + 880e^-.1t
a. find the temperature of the bar at the end of one hour
b. Find the average value of the temperature over the first hour.

2007-12-12 04:58:03 · 1 answers · asked by simonkf2002 1 in Mathematics

Is it possible that different people could see colours differently? Could you and I both look at the sky, both knowing it is "blue", but what you see is a colour that I would call red (for instance) and what I see is a colour that you would call green and yet we have both been taught that that colour we see is called blue. A matter of perception. If that's the case, it could also be the true for the rest of our senses.
Hope that wasn't too deep for most of you.

2007-12-12 04:52:04 · 29 answers · asked by Anonymous in Physics

what do they think of humans? what about other animals?

2007-12-12 04:50:48 · 18 answers · asked by deejay 3 in Astronomy & Space

I solved it and got it down to this: x^2+y^2 = 2x^2

But I got a point taken off, I guess because it can be taken down one more step into: θ=pi/4

How do you make that step to that? How do you go from what I got to θ=pi/4 ? Explain please? Thanks!

2007-12-12 04:46:45 · 7 answers · asked by deb3267 1 in Mathematics

Look at http://www.timeanddate.com/worldclock/astronomy.html?n=179&month=12&year=2007&obj=sun&afl=-1&day=1

It shows that sunset in New York is at 16:28 on Dec 12 but at 16:31 on Dec 21. I thought sunset is earliest on the winter solstice. The site does show that it is the shortest day, however.

2007-12-12 04:45:15 · 6 answers · asked by presidentrichardnixon 3 in Astronomy & Space

=TIME(LEFT(IF(LEN(P249) = 5, "0" &P249, P249), 2),MID(IF(LEN(P249) = 5, "0" & P249, P249), 3,2),RIGHT(IF(LEN(P249)=5, "0" & P249, P249),2))

This is used to extract a 6 digit number that represents a millitary time HHMMSS (hours, minutes, second)

for example: if the cell says 23 that is means 12:00:23 AM and the statement should return 12:00 AM
if the cell says 172359 that means 5:23:59 and the statement should return 5:23 PM

something here is wrong and I can't figure it out.
ANY GENIUSES OUT THERE?

2007-12-12 04:43:05 · 2 answers · asked by KEYNARDO 5 in Engineering

I can't figure this out - I'm doing something wrong.

Instructions are to Divide and write my answer without exponents:

-9.8 x 10^-7 / 1.4 x 10^-4

Thank you so much for your assistance.

2007-12-12 04:42:21 · 7 answers · asked by higherlovetx 5 in Mathematics

I have a take home test, and am stuck on this problem. I need to get this right, to pass. could someone help me solve this problem. it would be appreciated more then you know. Thank You.

An office manager has 5 cent stamps, eight cent stamps, and twenty cent stamps.
There are three times as many 20 cent stamps as five cent stamps. There are 2 fewer eight cent stamps then five cent stamps. The total value of the stamps in the collections is 2.76. Find then number of five cent stamps.

Cold anyone give me any help on solving this.

2007-12-12 04:38:19 · 9 answers · asked by Anonymous in Mathematics

2007-12-12 04:37:16 · 12 answers · asked by john c 5 in Physics

hey guys, i need this answer by tonight...how much of the earth does the temperate forest cover? -thanks so much!

2007-12-12 04:35:04 · 1 answers · asked by Anonymous in Earth Sciences & Geology

I changed it to y^9 x^4/ x^6 y^2 but what do I do from there? I don't need to solve anything, just simplify it with positive exponents in the final answer.

Thanks for your help!!

2007-12-12 04:33:18 · 3 answers · asked by ♫ ∫aoli 4 in Mathematics

The Arctic ice has nearly halved since 1980, soon it will be gone. Will this effect sea levels or weather/climate or anything? Thanks for info.
Peace

2007-12-12 04:28:08 · 12 answers · asked by ieatbacon4breakfast 2 in Earth Sciences & Geology

I need to know if there are any diseases related to the imperfect structure or function of chloroplasts. I also need to know if it can be treated. Please cite a source if you kow a good one.

2007-12-12 04:26:37 · 9 answers · asked by Ryan B 1 in Botany

How many grams of hydrogen will be given at dissolution 150g of zinc in hydrochloric acid

2007-12-12 04:24:58 · 4 answers · asked by jammal hines 1 in Chemistry

2007-12-12 04:24:48 · 3 answers · asked by jason c 1 in Mathematics

the cosmic microwave background radiation was emitted by gas that was about 3000 k (about half the temerature of the sun). why does it now represent a 2.74 blackbody?

2007-12-12 04:23:59 · 2 answers · asked by Anonymous in Astronomy & Space

2007-12-12 04:23:23 · 5 answers · asked by Narok 1 in Physics

How far back, historically, do theories about inheritance date

(in the passing parents passing genes onto child way)

2007-12-12 04:20:26 · 2 answers · asked by sand_illusions 4 in Biology

Two requirements for natural selection are?

fitness and adaptation
heritability and fitness
heritability and variation ( I chose this )
fitness and variation

Which of the following best describes evolution by natural selection as we now understand it?

Survival of the fittest
Only the smartest and strongest survive
Change in the frequency of traits over time ( I chose this)
Random changes in traits over time

If we cut the tail off a mouse, then breed it with a normal mouse with a full tail, we would expect?

All the offspring will have no tails
None of these answers are correct
Half of the offspring will have tails, the other half will not
All the offspring will have tails ( i chose this)

Natural selection will increase the frequency of a trait in a population if that trait?

is maladaptive
is highly fit
increases organisms' chances of survival only
increases organisms' chances of survival and reproduction ( I chose this)

2007-12-12 04:16:31 · 2 answers · asked by jeniferrrr 1 in Biology

well - everybody knows that there is some kind of secret government who rules the world - The Elite - So - what for they need to do all these things - like making people more stupid that they already are. They already have enough power and money... What is they purpose behind all this..... it's just doesn't make any sense...

2007-12-12 04:07:41 · 10 answers · asked by zakitc 1 in Other - Alternative