Science & Mathematics - 21 December 2007

1. 27 +sqrt 297 divided by 9





2. solve and check this problem
sqrt y +18 =4

2007-12-21 09:15:06 · 6 answers · asked by God Bless America!~ 4 in Mathematics

1. (7 + sqrt 3) (7-sqrt 3)



2. sqrt 75a^2 divided by sqrt 5

2007-12-21 09:12:36 · 5 answers · asked by God Bless America!~ 4 in Mathematics

a sqrt 8 -3 sqrt 2a^2

2007-12-21 09:10:14 · 8 answers · asked by God Bless America!~ 4 in Mathematics

A lightyear is

A. When an object remains weightless in space for 365 days at a time
B. 100,000 miles per second
C. The distance that light travels in one year
D. A calendar year in which no new stars or planets are discovered

2007-12-21 09:08:43 · 8 answers · asked by Anonymous in Astronomy & Space

This is the makeup for a grade

A is 40%
B is 40%
C is 20 %

(note that these numbers are grades) A=90 B=90 and C=95

what would the grade be in percentage

2007-12-21 08:59:34 · 4 answers · asked by The Lone Trumpeter 2 in Mathematics

2007-12-21 08:55:17 · 3 answers · asked by baller babe 1 in Astronomy & Space

Has anyone watched Paranormal State on A&E?
I usually love scary movies/shows. I tuned in, thinking it would be a slight thrill and nothing more.
I couldn't even finish watching the first episode....it was sooo scary!
Does anyone think this reality show could possible be real? I'm not brave enough to finish watching it, but I do have it tivo'd in case my hubby will watch with me!

2007-12-21 08:55:15 · 11 answers · asked by acea 5 in Paranormal Phenomena

2007-12-21 08:53:23 · 15 answers · asked by M-Squared 2 in Earth Sciences & Geology

Here in SW France there is, as described, a strange circular hole in the clouds through which the moon is in the middle. What sort of metreological phenomena is this and what does it signify will happen to the weather?

2007-12-21 08:51:41 · 11 answers · asked by Anonymous in Weather

According to the Wall Street Journal, 14,200,000 videotape copies of Walt Disney's Fantasia have been sold to date. Write that number in scientific notation?

A. 142 x 1,000,000
B. 1.42 x 106

C. 1.42 x 107

D. 142 x 107

2007-12-21 08:50:42 · 5 answers · asked by yummyummy 1 in Mathematics

If a ball is thrown vertically upward from a height of 5 ft. with an initial velocity of 80 ft/sec, its height h after t seconds is given below. How long does it take the ball to return to the ground? Round to two decimal places.
h=-16t^2+80t+5

2007-12-21 08:42:48 · 4 answers · asked by lynne 2 in Mathematics

Helen had to read 148 pages of her science textbook in the 4 days remaining before an exam. If she reads the same number of pages each day, how many pages will she need to read each day?

2007-12-21 08:39:04 · 9 answers · asked by yummyummy 1 in Mathematics

2007-12-21 08:36:50 · 1 answers · asked by safa s 1 in Chemistry

I hope this doesn't sound like a stupid question. I just want to learn more about elephants and I might start a blog about them but I need to know why their population is decreasing due to ivory.

Oh! and you can tell me something about elephants too if you want!!=]

2007-12-21 08:36:49 · 12 answers · asked by Nora 1 in Zoology

I have this question...

http://ce.byu.edu/courses/hs/999065041006/secure/imgs/Math%2041/4sb21a.gif

Can someone help me solve it? Thanks!

2007-12-21 08:33:17 · 5 answers · asked by Starburst 2 in Mathematics

2007-12-21 08:31:42 · 8 answers · asked by Anonymous in Other - Science

Referring to log base 10

2007-12-21 08:30:18 · 6 answers · asked by Vi A 1 in Mathematics

we watched a video in biology to day and there was a big monkey screaming. what king of monkey is it?

2007-12-21 08:30:11 · 3 answers · asked by skylar 2 in Biology

Does anyone know how Gypsum is mined? Thxs!!! Hope everyone has a good holiday!!

2007-12-21 08:30:04 · 2 answers · asked by Taylor 1 in Earth Sciences & Geology

I'm talking about the machine on the wall with the light behind it on which they post the x-rays and have a study of them, before removing them and turning the light off.

I know it sounds like minutae but I want the proper term and I can't think of it (maybe I never knew it!)... and I need it for something I'm writing.

Thanks.

2007-12-21 08:29:47 · 4 answers · asked by LJG 6 in Medicine

2007-12-21 08:27:40 · 9 answers · asked by Anonymous in Physics

2007-12-21 08:23:03 · 6 answers · asked by Anonymous in Physics

2007-12-21 08:15:26 · 6 answers · asked by agwala_mms2005 1 in Biology

2007-12-21 08:01:25 · 7 answers · asked by Mia R 3 in Weather

2007-12-21 08:00:44 · 3 answers · asked by Linda e 2 in Earth Sciences & Geology

But too large to write even with scientific notation.

2007-12-21 07:59:57 · 5 answers · asked by Anonymous in Mathematics

And how many times can you use the type that you put on your keychain? It's accidently been sprayed, and am wondering if I need to get a new one or if there is still some left in there?

2007-12-21 07:57:35 · 1 answers · asked by vuh 1 in Other - Science

1, -1, +3
+1, -2, +7
+1, +2, +7
-1, -2, +7
-1, -2, +3

2007-12-21 07:52:15 · 3 answers · asked by Poeteress 1 in Mathematics

A 45-45-90 degree triangle with legs of length 1 unit. Call this trianlge T1.

What is the name of the process that allows you to calculate the length of the hypotenuse of this triangle?

Calculate the exact value lenght of the hypotenuse of the trianlge.

What kind of triangle is this?

2007-12-21 07:51:42 · 9 answers · asked by cher-roll 2 in Mathematics

I know it has been taken seriously with string theory and other dimensions have been shown plausible through math. I was wondering where I can find specific writings on these things. a proof is even better. the only proof I have found so far has been on the famous "Poincaré Conjecture."

2007-12-21 07:51:05 · 5 answers · asked by sunscour 4 in Physics