Science & Mathematics - 5 November 2007

2007-11-05 06:50:42 · 4 answers · asked by baynhamr 1 in Physics

I need to know how do you solve a square root of 75xto the power of 4?

I need to simplify. Assuming x represents a postive number.

2007-11-05 06:49:07 · 3 answers · asked by BeBop 3 in Mathematics

what are the chances that it is really gonna hit earth and the goverment aint telling us ,cause we would all turn into chicken littles?are we gonna be vaporized into stinky little stains on the side of a huge crator?

2007-11-05 06:46:52 · 7 answers · asked by john doe 5 in Astronomy & Space

I have searched everwhere and i cant find it its for my ag class for the FFA thanks

2007-11-05 06:46:47 · 2 answers · asked by Anonymous in Agriculture

Calling all Math whizzes.

Four friends are collecting canned food for needy families. There are two girls and two boys. The girls are named Danielle and Emily and the boys are named Ryan and Zach, The last names of the children are Anderson, Olson, Riley and Shin. Their agesare 8,10,11, and 12. The streets they live on are maple, nut, oak, and pinehill. The number of cans they collected were 100, 110, 132, and 144. Using the statements below, determine the students first name, last name, street they live on, and number of cans they collected.

1. Danielle and Shin play on the girls soccer tema.

2. Anderson and Zach ages are one tenth as much as the number of cans of food they each collected.

3. The boy that lives on maple collected more than olson.

4. The number of letters in the name of emily's street is the same as her age.

5. Emily is 2/3's as old as, and collected more cans of food than, the girls who lives on Oak.


thanks!

2007-11-05 06:46:31 · 4 answers · asked by Anonymous in Mathematics

2007-11-05 06:44:52 · 3 answers · asked by Geanine J 1 in Mathematics

I can make a square. but that is nearly 4 lines making a polygon. how do i make cad understand that the square is a peice of steel and has a width?

2007-11-05 06:41:56 · 5 answers · asked by Anonymous in Engineering

How much force would she have to exert if the barbell were lifted underwater?

2007-11-05 06:39:47 · 3 answers · asked by Anonymous in Physics

What is the final system reliability (in %) of 2 identical components in parallel whose individual reliability is 85%?
Please explain and thank you in advance.

2007-11-05 06:38:31 · 1 answers · asked by 037 G 6 in Engineering

What is the difference between infrared given off by hot stuff and infrared of remote controls. Why is it that infrared remote controls appear to "light up" when seen through a digital camera but other hot stuff appears the same?
How come infrared remote controls dont emit heat then?

2007-11-05 06:38:17 · 2 answers · asked by Anonymous in Other - Science

Find the minimum value of z = 2x + 3y subject to the constraints
5x + 3y > or = 15
x + 6y > or = 12
x > or = 0, y > or = 0


a) 5
b) 7
c) 9
d) 11

2007-11-05 06:36:58 · 1 answers · asked by brownk_1999 1 in Mathematics

it seems when a living creature dies, an animal, for arguments sake, the flesh and bones decay. no bones can realistically remain in a single location for millions of years to then become covered up with dust, etc, and then be turned into fossils under the immense pressure. Everything becomes dust in the wind, to coin a phrase, long beforehand. So do you as an evolutionist believe that either a single cataclysmic event happened to cause fossils or many cataclysmic events? And a second part to the question, are fossils still being created today; if so, where do you believe this is occurring.
PS, I'm asking because I'm curious, not trying to denigrate what anyone believes. Just curious. Thanks

2007-11-05 06:36:07 · 18 answers · asked by Wayne G 5 in Earth Sciences & Geology

Which of these sets of points are the corner points for the feasible region satisfying the system of linear inequalities 2x + 8y < or = 32, 5x + 2y > or = 30, x> or =0, y > or =0?

a) (5,9), (4,0), (1/2, 4/9)
b) (0,4), (15, 0), (0, 0)
c) (0,4), (0,15), (4, 0), (4, 9)
d) (0, 4), (0, 15), (44/9, 25/9)

2007-11-05 06:35:54 · 2 answers · asked by brownk_1999 1 in Mathematics

Which of these points does not satisfy the constraints?
6x + 8y <= 48, x + y <= 7, x >= 0, y >= 0


a) (1,6)
b) (4,3)
c) (6,1)
d) (1,4)

2007-11-05 06:34:44 · 1 answers · asked by brownk_1999 1 in Mathematics

2007-11-05 06:32:24 · 1 answers · asked by Patrick b 1 in Engineering

if its impossible for anything to move faster than the speed of light then how can a black hole suck in light? anything entering a black holes pull must be moving faster than light or we would be able to see it

2007-11-05 06:29:16 · 8 answers · asked by Paul B 1 in Astronomy & Space

2007-11-05 06:29:02 · 3 answers · asked by Anonymous in Mathematics

find the critical points of optimization and whether the function is a maximum or minimum at these points.

5x^2 + 4xy + 3y^2 - 52x - 56y + 13

dz/dx = 10x + 0 + 0 - 52 - 0 + 0 = 0
10x - 52 = 0
x = 5,2

dz/dy = 0 + 0 + 6y - 0 - 56 + 0 = 0
6y - 56 = 0
y = 9,34

so, theres just one critical point then? P(5,2/9,34)?

or would it be:

(-5,2/9,34)
(5,2/-9,34)
(5,2/9,34)
(-5,2/-9,34)?

i assume its just P(5,2/9,34) ..so what I did was:

d^2z/dx^2 = 10

Zxx(5,2/9,34) = 5,2*10 = 52 > 0 Minimum

d^2z/dy^2 = 6

Zyy(5,2/9,34) = 6*9,34 = 56,04 > 0 Minimum

did i do this correctly? any help/comments will be appreciated. thanks:)

2007-11-05 06:27:37 · 1 answers · asked by Mathema-what?! 1 in Mathematics

2007-11-05 06:25:51 · 3 answers · asked by hally j 2 in Engineering

Can the photographed UFO craft phenomenon and spirits be reflections or glimpses into a dimension sharing our same time space?

Is it like living in a two dimensional world and experiencing a third dimensional object. You have never seen a three dimensional object so you do not recognize it with your eyes but it is there.

Could that be what is happening here in our dimension and reality? These things are from a higher dimension and because of what we are limited to know in this dimension and the certain lighting our eyes register and are used to; we simply do not see what is there.

But every now and then because of certain lighting, the speed of the camera and the chance angle, we see these other dimensional objects show up.

Any thoughts

2007-11-05 06:25:24 · 12 answers · asked by scottanthonydavis 4 in Paranormal Phenomena

Which of the following is true.
7 > 11
-8 > -11
0 < -4
-8 > 12

2007-11-05 06:24:17 · 3 answers · asked by jewel7962002 1 in Mathematics

True or False? Is 6 > or = 6

2007-11-05 06:23:41 · 12 answers · asked by jewel7962002 1 in Mathematics

How many megabytes, gigabytes or terabytes does the average human memory contain?

2007-11-05 06:23:23 · 7 answers · asked by CalumRouge 1 in Biology

find the inflection point, concavity, i dont know how to do this, anyything would help, thanks

2007-11-05 06:21:13 · 1 answers · asked by syem64 2 in Mathematics

The cheetah is the fastest land-dwelling animal on the planet. It has been known to reach peak speeds of almost 80 miles per hour! It uses this speed to catch animals that are too fast to be killed by most other predators. According to Charles Darwin's ideas, the cheetah did not allways exist. Instead, it arose from slower predators. How did natural selection produce such a creature?

2007-11-05 06:16:15 · 1 answers · asked by Anonymous in Biology

what is INTERCISTRONIC and what is INTRACISTRONIC

2007-11-05 06:16:15 · 1 answers · asked by Anonymous in Biology

The weekly revenue R, in dollars, from selling x calculators is

R(x) = -20x^2 + 1000x

a. Determine where the graph of R is increasing and where it is decreasing.


b. How many calculators need to be sold to maximize revenue?


c. What is the maximum revenue?

2007-11-05 06:15:32 · 3 answers · asked by tsLow 1 in Mathematics

2007-11-05 06:14:21 · 2 answers · asked by Anonymous in Engineering

Restriction endonucleases are naturally made in certain organisms. What is their purpose?

2007-11-05 06:12:26 · 2 answers · asked by damigurl05 1 in Biology

NASA said that it would take scientists 15 years from now to design and build a craft to go back to the Moon. Why when we have allegedly been there 6 times already?

Why did the blueprints and plans for the Lunar Module and Moon Buggy get destroyed if this was one of History's greatest accomplishments?

2007-11-05 06:11:07 · 9 answers · asked by Anonymous in Astronomy & Space