Science & Mathematics - 14 February 2007

What is the relationship and the difference between addition and mutliplication? What is the relationship and the difference between subtraction and division?

2007-02-14 03:52:06 · 2 answers · asked by TPCAN 3 in Mathematics

5/8-6/-5

2007-02-14 03:51:25 · 5 answers · asked by JoAnn O 1 in Mathematics

5/8-6/-5

2007-02-14 03:51:01 · 7 answers · asked by JoAnn O 1 in Mathematics

Jane wants to take out a 20 yr mortage. the interest rate is 8% compounded semi-annually. jane can afford monthly payments of $850. what is the largest mortage that she can afford?

My attempt at a solution ( using a graphing calculator):
N= 20 x 12 = 240
I%= 8
*PV= 102 612.70???
PMT= -850
FV = 0
P/Y = 12
C/Y = 2
PMT = END

but im suppose to solve this without a graphing calculator.

PV = (R(1-(1/1+i)^n)/i

R = 850
n = 240
i = ????
HELP!!!!!!

2007-02-14 03:49:14 · 1 answers · asked by mathelp 2 in Mathematics

2007-02-14 03:48:29 · 1 answers · asked by jaime jg 1 in Physics

Just a question from homework.

2007-02-14 03:47:20 · 7 answers · asked by mimi 1 in Engineering

I'm working on a lab in a biology class. This lab is used by many, many schools so this question might look familiar (though it's not on Yahoo Answers yet). I'm looking for the effect, and why the effect happens. What alcohol causes the greatest damage to the beet cell membrane -- methanol, ethanol, 1-propanol -- and why? Size of molecule?

2007-02-14 03:46:15 · 1 answers · asked by rm3emt 1 in Biology

I have an equation: x'+(1/t)x=1.
I need to find a g(t) that would work when it is put in like so...
x'e^(g(t)) + (1/t)xe^(g(t)).
I think that g(t)=2/t^2 but I'm not sure. Any help would be great. Thanks.

2007-02-14 03:43:13 · 2 answers · asked by jenzilla84 1 in Mathematics

The obvious answer would be the size, but what are the defining limits

2007-02-14 03:40:41 · 7 answers · asked by theearlof87 4 in Earth Sciences & Geology

Please and Thank you!

2007-02-14 03:40:38 · 2 answers · asked by Maya 2 in Geography

7/-3+-8/7

2007-02-14 03:39:17 · 6 answers · asked by JoAnn O 1 in Mathematics

2007-02-14 03:38:50 · 9 answers · asked by Amaar 1 in Earth Sciences & Geology

I am analysing some material and I have totally confused my self. I have an answer to the following but would love someone else to confirm it. And maybe show working out.

I had a 0.01g sample of pure material (compound X) which I diluted in 1 ml of water from this solution I took 0.1 ML of liquid and diluted it in 1 ML of water. This gave me a 1 mg in 1 ML standard which I used to calibrate the Machine; the machine gave a value of 52500 for 1 mg in 1 ML.

For my unknown sample I dissolved 1g in 1.5 ML water, from this solution I took 0.1ML and diluted this with 1 ML of water. The machine gave this a value of 2656.

So my question what % of my unknown sample is compound X?

2007-02-14 03:36:10 · 3 answers · asked by Robert S 2 in Mathematics

or are you so narow minded that you think its all about planet earth

2007-02-14 03:35:18 · 18 answers · asked by Anonymous in Astronomy & Space

2007-02-14 03:35:14 · 7 answers · asked by Anonymous in Mathematics

I saw on the TV news that NY is stuck in snow.

2007-02-14 03:34:58 · 6 answers · asked by Brenno 6 in Weather

2007-02-14 03:34:42 · 2 answers · asked by Shafali V 1 in Chemistry

The town is in Europe and now belong to ROMANIA

2007-02-14 03:34:12 · 2 answers · asked by Anonymous in Engineering

2007-02-14 03:32:54 · 12 answers · asked by Anonymous in Mathematics

7/-3+-8/7

2007-02-14 03:31:44 · 6 answers · asked by JoAnn O 1 in Mathematics

2007-02-14 03:31:10 · 8 answers · asked by Anonymous in Chemistry

it evaporates less than a week

2007-02-14 03:30:22 · 6 answers · asked by jaime jg 1 in Physics

It is a typical Saturday morning working at Dunkin Donuts. Jim and Matt who opened the store work 7 hours. Rob who came in an hour later works 6 hours and Jen and Chris who came in at 7 work 5 hours. If they make a total of $48.50 in tips during the day how much should each person be given?

2007-02-14 03:29:42 · 5 answers · asked by Minamoto 1 in Mathematics

2007-02-14 03:29:25 · 2 answers · asked by Anonymous in Mathematics

What are those white things on the side of tree trunks that look like eyes? When I was in primary school they used to scare me senseless!

2007-02-14 03:28:34 · 5 answers · asked by Vanessa 3 in Botany

Let’s say that humans actually settled on Jupiter and the “United States of Jupiter” adopted the same driving law. If you waited to get your license until you were 18 years old, living on Jupiter your whole life, what would your age be in Earth years?

2007-02-14 03:28:26 · 4 answers · asked by Minamoto 1 in Astronomy & Space

Yesterday's New York Times ran an editorial about patenting cell lines, written by Michael Crichton. The ideas are also discussed in his new book "Next."
Is it possible for a company or a university to own your cell line, without your written permission and detailed consensual knowledge?

2007-02-14 03:27:36 · 3 answers · asked by Zelda Hunter 7 in Medicine

2007-02-14 03:26:11 · 28 answers · asked by jacksmood 1 in Geography

In the very distant future, could a starship supposedly generate it's own wormhole around the ship? The spacecraft could generate massive amounts of magnetic energy and other forms of energy that would cause space-time distortions that would limit the worm-field to be the same shape as the ship. That way, the ship could travel through the wormhole and yet remain on course. I'm NOT crazy, I just had this idea. Could it happen?

2007-02-14 03:26:00 · 7 answers · asked by Michael n 2 in Astronomy & Space

Tell mme everything, Like what are the symptoms, Its habitat, from how many hour will you die after youve been bitten. how can it be repelled? also this goes for the tarantula

2007-02-14 03:25:30 · 8 answers · asked by thenewhorzta 3 in Zoology