Science & Mathematics - 30 October 2007

1.) If 8 and 12 each divide K without a remainder, what is the value of K?

A.) 16
B.) 24
C.) 48
D.) 96
E.) It cannot be determined from the information given.

2007-10-30 11:24:08 · 12 answers · asked by blessed 1 in Mathematics

A. -3, -3
B. -3, -4
C. 1, 3
D. 1, -3, 4
E. -2, 5

2007-10-30 11:23:33 · 1 answers · asked by Anonymous in Mathematics

shape from the inside of well, not the outside.

2007-10-30 11:19:36 · 2 answers · asked by saurav 1 in Earth Sciences & Geology

2007-10-30 11:18:06 · 4 answers · asked by sona 1 in Chemistry

elements have to have the same amount of protons and electrons in an atom, why can they have different amount of neutrons?

2007-10-30 11:13:55 · 2 answers · asked by Charli 1 in Chemistry

I suck at fractions.


The question is Find one of the factors when x^2 - 11/12x + 1/6 is factored completely.

The answer choices are
a) x - 2/3
b) x + 1/6
c) x - 1/3
d) x - 1/2


I guessed D. but that's wrong.

2007-10-30 11:12:23 · 2 answers · asked by 013291 2 in Mathematics

How many protons, nuetrons, and electrons are in a oxygen atom?

2007-10-30 11:10:57 · 2 answers · asked by queenteen 1 in Chemistry

I need to know why iron is called iron and what language it's from...
any other information about iron is also good.

2007-10-30 11:10:21 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-30 11:09:53 · 5 answers · asked by You Don't Know Me!!! 2 in Mathematics

The numbers Rsub1, Rsub2, and Rsub3 and R satisfy the following equation: (1/Rsub1)+(1/Rsub2)+(1/Rsub3)=(1/R).

A. If Rsub1=1 and Rsub2=2 and Rsub3=3, compute R exactly.
B. If both Rsub1 and Rsub2 are held constant, and Rsub3 is increased by .05, what is the approximate change in R?

Ok, I got part a, that's simple enough. I realize you can solve this easily using a calculator, But how do you do B by using linear approximation?

2007-10-30 11:08:37 · 1 answers · asked by Anonymous in Mathematics

In a physics lab experiment, a spring clamped to the table is used to shoot a 45g ball at a 33 degrees angle. When the spring is compressed 17 cm, the call travels horizontally 6.0 m and lands 1.70 m below the point at which it left the spring. What is the spring constant?

2007-10-30 11:08:17 · 1 answers · asked by Anonymous in Physics

I just need a brief report on it!! Why it should be.............!!!

2007-10-30 11:07:27 · 1 answers · asked by diya 1 in Chemistry

the questions are
1) Which number has all the following characteristics?
Its is prime
it is greater than 90
it is less than 100
it is not a multiple of 3

2) find x if x is prime and 23
3)The area of a rectangle is 36. What could be the dimensions of the rectangle if the lenght and width are whole numbers and neither is a prime number?

4)Find the common multiples of 8 and 20 that are less than 300

5)There is a prime number between 11 and 46 about which a teacher will answer three "yes" and "no" questions from her class. After answering the question, the first student to determine the correct number will get extra credit.
The students asked: 1. is it 5 or 6 more than a perfect square?
2) it is three more than a multiple of 7?
3)is the sum of its digits odd?
The answer were yes, yes, and no, respedtively. What is the number?

2007-10-30 11:05:14 · 4 answers · asked by sweethoney9079 4 in Mathematics

for gypsum: (CaSO4·2H2O)

what does the dot between O4 and 2H mean?

2007-10-30 11:03:31 · 2 answers · asked by bleuespere 1 in Chemistry

2007-10-30 11:02:08 · 1 answers · asked by jorge 1 in Botany

2007-10-30 11:01:14 · 3 answers · asked by chief 1 in Engineering

I am doing a project.

2007-10-30 10:59:29 · 1 answers · asked by . 2 in Biology

for 60 days using the ordinary interest method?

2007-10-30 10:58:13 · 3 answers · asked by Kary M 1 in Mathematics

geography question, thanks :)

2007-10-30 10:57:31 · 3 answers · asked by KAILY. 1 in Geography

i got

39+13i

my question is, would you simplify it to 3+i

2007-10-30 10:57:13 · 2 answers · asked by ike 3 in Mathematics

give me it by days ,weeks,months and years
thank you

2007-10-30 10:57:03 · 7 answers · asked by Anonymous in Astronomy & Space

a. Natural fluctuations in the sun’s mass
b. Location of continents
c. Declination
d. Elliptical orbit of the earth around the sun
e. Friction with the seafloor

2007-10-30 10:56:54 · 1 answers · asked by afchica101 1 in Earth Sciences & Geology

2007-10-30 10:54:33 · 3 answers · asked by Anonymous in Earth Sciences & Geology

A balloon of mass M is floating motionless in
the air. A person of mass less than M is on
a rope ladder hanging from the balloon. The
person begins to climb the ladder at a uniform
speed v relative to the ground.
How does the balloon move relative to the
ground?
1. The balloon does not move.
2. Down with a speed less than v
3. Up with speed v
4. Down with speed v
5. Up with a speed less than v

2007-10-30 10:53:30 · 1 answers · asked by Anonymous in Physics

How many cows left?

2007-10-30 10:51:59 · 42 answers · asked by Alexander 6 in Mathematics

running the marathon ( 26.2 miles long)
Thina average speed maintained per mile is 11 min. and 15 sec. She is closer to the front and leaves the starting point at 8:02 a.m.
Manuel is farther behind at the start and he begins his run at 8:15 a.m. Manuel maintains an average speed of 5.8 miles per hour.
How long and at what distance(if it happens) will the 2 be at the same location. and at what time will both kids finish the run?

i need help understanding how to do it

2007-10-30 10:50:04 · 1 answers · asked by crayola 2 in Mathematics

http://i78.photobucket.com/albums/j106/Cookie_Calhoun/aaa.jpg

2007-10-30 10:49:11 · 2 answers · asked by Goddess Allure 2 in Mathematics

okay hahaha last question. I have a test tomorrow so I'm trying to go over my quizzes to study. Anyways. I'm a little stuck on two of the substitution problems. the first one is just a checking problem.

I've been graphing the 2 equations to make sure I got the right answers, but on the one that is:

x^2 -xy + y^2 =13
I can't remember how to get y-alone. I had this problem before but I'm just not seeing it. But I only need that so I can graph it and check my answers. the second problem is similar

x-2y = 4
x^2 -y^2 =11

I tried get x by itself in the first one but I didn't want to have to square a fraction like that when I substitute it back into the second problem. So I solved for y in the first one and substituted it into the second one. well, I ended up with

5y^2 + 16y + 5 =0
I'm wondering if I did that wrong because it won't factor and I really don't want to use the quadratic formula. I had a negative number under the square root last time. thanx!!!!

2007-10-30 10:47:43 · 2 answers · asked by angelicasongs 5 in Mathematics

solve

2007-10-30 10:44:53 · 2 answers · asked by Goddess Allure 2 in Mathematics

Does it mean that twin chicks would hatch from this egg?

2007-10-30 10:42:12 · 5 answers · asked by Alexander 6 in Biology