Science & Mathematics - 6 September 2007

2007-09-06 14:34:00 · 6 answers · asked by Mr. Arkansas 3 in Biology

30-45/5.3+11
30-45/15+11
30-3+11
30-14
=16

2007-09-06 14:30:14 · 4 answers · asked by CAROL C 1 in Mathematics

How do you know which function to use to calculate the function value for a particular x, when a function is defined piecewise with two or more definitions??

2007-09-06 14:28:12 · 3 answers · asked by Anonymous in Mathematics

Please help me solve this by factoring..

2x^2 + 3x - 2 = 0

I don't know why I'm having such a hard time with it.

2007-09-06 14:27:39 · 4 answers · asked by Anonymous in Mathematics

Is Algebra I just Algebra and is Adv. Algebra Algebra II? Are they the same classes but with different names, or just a different class entirely?

2007-09-06 14:26:21 · 3 answers · asked by yellowducks 1 in Mathematics

2007-09-06 14:25:44 · 2 answers · asked by spanishfly_100 1 in Mathematics

idk how to do 1/2x+2/3yhen x=18 and y=7.

plz show me how to do step by step...ty

2007-09-06 14:25:19 · 1 answers · asked by jh j 1 in Mathematics

2007-09-06 14:25:05 · 2 answers · asked by Teresa 1 in Physics

My science teacher brought it up last year, and I'd like to research it, but for my life I can't remember what the name of it was.

Basically, it's that all life on Earth formed from amino acids encased in a meteor that crashed on the planet.

..I think.

2007-09-06 14:23:33 · 5 answers · asked by cindy 2 in Astronomy & Space

28 pecks= how may blushes

1) 4
2) 8
3) 7
4) none of the above

and if you show me how to do it it will be very helpful

2007-09-06 14:22:38 · 5 answers · asked by lolo bear 2 in Mathematics

I'm trying to find the equation of a plane containing the point (1,2,1) and perpendicular to the planes ( x + y = 2) and (2x + y - z = 1)

I think the answer should be -(x-1) + (y - 2) - (z+) = 0 but the answer in the book reverses the signs so that
(x - 1) - (y-2) - (z+1) = 0

I have no idea why?
thanks

2007-09-06 14:22:32 · 1 answers · asked by snoboarder2k6 3 in Mathematics

2007-09-06 14:18:15 · 1 answers · asked by Anonymous in Engineering

plz and thanks

2007-09-06 14:17:11 · 5 answers · asked by Anonymous in Astronomy & Space

For science

2007-09-06 14:15:20 · 7 answers · asked by Die hard San Diego fan 1 in Astronomy & Space

plz i need help getting some answers to my review so i can study them for my quiz this monday i thank you for helpin me learn

2007-09-06 14:15:10 · 3 answers · asked by curiousadult 6 in Physics

A clock stikes every hour-once at 1:00, twice at 2:00, etc. If it takes the clock 8 seconds to strike 5:00, how long will it take to strike 9:00?

2007-09-06 14:13:00 · 2 answers · asked by Chris L 1 in Mathematics

In my class we were asked to write a paragraph on whether or not fire is alive based on the criteria given by scientists....
does it ingest?
complex?
Reproduce?
Homeostasis?
Movement?
Growth?

Well i have them all figured out.... i think..... except for the whether it is complex or not and the homeostasis one..... can u tell me whether it is alive or not and use this criteria? and if anything explain whether or not it is complex..... PLEASE AND THANK YOU!!!!

2007-09-06 14:10:50 · 8 answers · asked by Missy_Attitude 3 in Biology

If we can see lightning when a thunder head moves threw clouds in a storm, why doesn't this happen on a smaller scale

2007-09-06 14:09:49 · 2 answers · asked by Anonymous in Weather

x^2-y=0 ????
HELP!!!!!

2007-09-06 14:09:34 · 1 answers · asked by Catherine D 1 in Mathematics

is there a specific word ?

2007-09-06 14:08:02 · 5 answers · asked by Anonymous in Physics

Determine the density of a proton. For a sphere V = (4/3)\pi r^3.
The proton has a radius of approximately 1.0 times 10^{ - 13} cm and a mass of 1.7 times 10^{ - 24}g
PS: i need to know how to do it step by step so i understand it..not just the answer. thanks!

2007-09-06 14:07:48 · 2 answers · asked by B 2 in Chemistry

my mom doesnt want it in the house anymore. Its a cottontail.

2007-09-06 14:06:15 · 6 answers · asked by kevin A 1 in Zoology

A) If a flea can jump straight up to a height of 0.490 m, what is its initial speed as it leaves the ground? (Take the free fall acceleration to be g = 9.80 m/s^2)

B) How long is it in the air? (Take the free fall acceleration to be g = 9.80 m/s^2)

I need some help figuring this problem out. What formulas do I need to use? Thanks!

2007-09-06 14:05:56 · 2 answers · asked by Anonymous in Physics

Hi,

I need to make a sailboat for school here are all the guidelines
link: http://www.sd44.org/education/components/scrapbook/default.php?sectiondetailid=3303&sc_id=1189124153

Please tell me wat to make the sailboat out of, lightest material.

Please click on link

2007-09-06 14:05:41 · 2 answers · asked by yahoo2000 2 in Engineering

Samantha deposits $300 in an account that earns an annual interest rate of 2.5%.After 9 months, she computes the simple interest.

2007-09-06 14:05:09 · 7 answers · asked by Anonymous in Mathematics

I was AMAZED by this video.. AMAZED. Let me know what you think!

http://www.youtube.com/watch?v=zJ8CUz4MZ1M&eurl=http%3A%2F%2Fwww%2Emotodom%2Ecom%2FGalaxy%2Ehtm

2007-09-06 14:04:05 · 2 answers · asked by Anonymous in Astronomy & Space

2007-09-06 14:03:51 · 3 answers · asked by nanacachetez 1 in Mathematics

1. It’s wrong to subject animals to imprisonment, violence, and death—animals are not ours to use for experimentation.

2. Ninety-two out of every 100 drugs that pass animal tests fail in clinical trials in people. Every year in the United States alone, there are more than 100,000 human deaths caused by drugs that were successfully tested on animals.

3. Animals don’t suffer from diseases in the same way that people do. The former head of the U.S. National Cancer Institute summarized the last 25 years of cancer research by admitting that “the history of cancer research has been the history of curing cancer in the mouse. We have cured mice of cancer for decades, and it simply didn’t work in humans ....”

4. Animal studies mislead researchers and waste precious time and resources. Famed primatologist and Harvard professor Richard Wrangham points out: “Every significant advance in the fight against AIDS has come through in vitro work, epidemiology, and studies of human volunteers.

2007-09-06 14:03:26 · 6 answers · asked by Anonymous in Zoology

1.- x(8 + x)
2. a(a - 2)
3. (3 + y)y
4. 4(10 - 3x)
5. (16 + 3t)t
6.(4s + 3)(-5)

im lost...

2007-09-06 14:01:33 · 16 answers · asked by Anonymous in Mathematics

2007-09-06 14:01:25 · 4 answers · asked by 22 4 in Chemistry