Science & Mathematics - 13 August 2007

f (x) = sqrt of 1+x
g(x) = sqrt of 1-x

domain of f+g, domain of f-g, domain of fg
domain of f/g
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NEXT

I know an inverse will "undo" what the function does but I don't think i'm doing these correctly:

f(x)= 6x+2
f^-1(x)=?

g(x)= 13x^3 - 7
g^-1(x)=?

h(x)= 6/x+7
h^-1(x)=?

j(x)= cubic rt of x+13
j^-1(x)=?
I know that this is the same as y^1/3
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LAST Question!

using the Cartesian equation (y=mx+b)
what is m and b?

I eliminated the parameter of t and solved for t in terms of x and substituted into the equation for y, then tried to get m and b from y in terms of x

x= -16-t
y=19-4t

2007-08-13 06:37:32 · 1 answers · asked by Mackenzie W 1 in Mathematics

i know u can find comets but how can u find tem cuz they might crash ur town but dont worry they brak up atleast thats what tv said

2007-08-13 06:36:57 · 5 answers · asked by Agent_runescpe5000 1 in Astronomy & Space

Surface area of what? Is it the area of the hollow circle created by the loop? The total surface area of the wound wire? Would a big loop, say, hula hoop size, with one winding, work just as good as a 4" rod inside the radio if the surface area of the windings were equal?

2007-08-13 06:36:37 · 2 answers · asked by Anonymous in Engineering

2007-08-13 06:30:26 · 11 answers · asked by just curious for answers 1 in Physics

2007-08-13 06:30:25 · 6 answers · asked by sugar lady 1 in Mathematics

Everyone says they really carry no disease because all they do is suck cow blood and drink water, and they really don't bite. Is this true?
(I know someone who's wanting to get one, NO, NOT me!!!!)

2007-08-13 06:29:12 · 6 answers · asked by Wutz it worth 2 ya? 6 in Zoology

How many different ways can twelve questions on a true-false test be answered if a student answers every question?

How many ways can six different books be arranged on a shelf?

How many ways can five students sit in a row of eight chairs for a photograph?

How many ways can you order a hamburger if you can order it with or without the following items: cheese, lettuce, tomatoes, pickles or onions?

How many different student body officers are possible if there are four seniors, five juniors, and three sophomores running for the student body offices: senior class president, junior class president, and sophmore class president?

Find the probability of selecting a green marble from a jar that contains four blue marbles, three red marbles, and five green marbles.

Find the probability of rolling a prime number when a die is rolled.

Find the odds in favor of getting all heads on three coin tosses.

2007-08-13 06:27:54 · 2 answers · asked by Jase 1 in Mathematics

Why does sugar dissolve in water and flour does not?

2007-08-13 06:23:54 · 3 answers · asked by beatme 3 in Chemistry

2007-08-13 06:23:35 · 1 answers · asked by mylife2428 1 in Weather

2007-08-13 06:19:41 · 2 answers · asked by Mohamud A 1 in Earth Sciences & Geology

How many moles of NaOH are required to prepare 0.250L of 6.68M NaOH?

2007-08-13 06:14:15 · 4 answers · asked by philip c 1 in Chemistry

Let N is a natural number.

(2*N)^(1/2),
(3*N)^(1/3) and
(5*N)^(1/5)
are also natural numbers.

What is the lovest possible N satisfying the above conditions.

Please DO NOT answer if your age is above 17 years.
-

2007-08-13 06:13:16 · 6 answers · asked by oregfiu 7 in Mathematics

And what is the deal with runways in the white area the same color??

2007-08-13 06:12:18 · 3 answers · asked by LGA1155 1 in Earth Sciences & Geology

A solid cylinder of uniform density of 0.85 g/cm3 floats in a glass of water tinted light blue by food coloring

Its circular surfaces are horizontal. What effect will the following changes, each made to the initial system, have on X, the height of the upper surface above the water? The liquids added do not mix with the water, and the cylinder never hits the bottom.

A liquid with a density of 1.06 g/cm3 is poured into the glass
The cylinder is replaced with one that has the same height and diameter, but with density of 0.89 g/cm3.
A liquid with a density of 0.76 g/cm3 is poured into the glass.
Some of the water is removed from the glass
The cylinder is replaced with one that has the same density and diameter, but with half the height.
The cylinder is replaced with one that has the same density and height, but 1.5× the diameter.

2007-08-13 06:11:06 · 1 answers · asked by Anonymous in Physics

Every once in a while, cosmologists are dragged, kicking and screaming, into a universe much more unsettling than they had any reason to expect. In the 1500s and 1600s, Copernicus, Kepler, and Newton showed that Earth is just one of many planets orbiting one of many stars, destroying the comfortable Medieval notion of a closed and tiny cosmos. In the 1920s, Edwin Hubble showed that our universe is constantly expanding and evolving, a finding that eventually shattered the idea that the universe is unchanging and eternal. And in the past few decades, cosmologists have discovered that the ordinary matter that makes up stars and galaxies and people is less than 5% of everything there is. Grappling with this new understanding of the cosmos, scientists face one overriding question: What is the universe made of?

2007-08-13 06:10:35 · 8 answers · asked by calm x 1 in Physics

2007-08-13 06:09:35 · 5 answers · asked by nitish 1 in Astronomy & Space

Calculate molarity of a 125mL aqueous solution containing 23.5g sodium sulphate (Na2SO4)

2007-08-13 06:08:06 · 3 answers · asked by philip c 1 in Chemistry

A small solid sphere of mass M0, of radius R0, and of uniform density r0 is placed in a large bowl containing water. It floats and the level of the water in the dish is L. Given the information below, determine the possible effects on the water level L, (R-Rises, F-Falls, U-Unchanged), when that sphere is replaced by a new solid sphere of uniform density.

Answer can either be Rise, Falls Unchanged, rise or unchanged, fall or unchanged, or rise or fall or unchanged

The new sphere has radius R = R0 and mass M < M0
The new sphere has mass M < M0 and density r = r0
The new sphere has radius R > R0 and density r < r0
The new sphere has density r = r0 and mass M > M0
The new sphere has density r > r0 and mass M = M0
The new sphere has radius R > R0 and mass M = M0

2007-08-13 06:07:50 · 2 answers · asked by Anonymous in Physics

2007-08-13 06:07:30 · 9 answers · asked by salamnder 2 in Physics

I've tried looking it up but can't seem to find it. I thought it was a wolf spider but I don't think the eyes are the same. I live in Colorado and this spider crawled out of the grass near the water spigot.
http://community.pregnancyweekly.com/forums/15240257/ShowThread.aspx#15240257

2007-08-13 06:07:20 · 11 answers · asked by Paula K 3 in Zoology

I can't believe that they would cost so much! Where I live, one CFL costs $5.39 and a 4-PACK of regular bulbs costs $1.59!!!

I understand that they would be more expensive, but not this much!

one for $5, and four for $1...

2007-08-13 06:03:21 · 3 answers · asked by michiganfan 3 in Other - Science

I have to complete a summer packet, and I'm having trouble with a few of the problems on it.
One of the questions says: solve by completing the square: x^2 + 6X - 10
I don't get it!!

Another question says: solve and state restrictions: 3 - 2/c^2 = 5/c
I've solved it, and I have a hazy idea of what restrictions are, but I still can't answer it.

2007-08-13 06:02:44 · 3 answers · asked by mkn 2 in Mathematics

Solar System feeds my equipment.My problem is in the RTU (Remote Terminal Unit ) which is used to send some data from a remote area . It is fed by DC through Battery Bank .
Battery Bank is fed by the Solar System. Many problems happen frequently because of the Battery Bank which is affected by the very bad ,hot , and sandy environment.

2007-08-13 06:01:56 · 2 answers · asked by cksnaan 1 in Engineering

where cud i get nuclear weapon deign ,parts....details....ne1 knows da exact site name......

2007-08-13 05:58:17 · 11 answers · asked by pras 1 in Engineering

For several months now, when ever I'm driving day or night, I keep seeing dark figures on the side of the road. Usually it suprises me and look again to see if someone is about to walk out onto the road, and then its gone. The figure looks like the outline of a person but I can't ever make out the features.

2007-08-13 05:56:20 · 17 answers · asked by Anonymous in Paranormal Phenomena

2007-08-13 05:56:16 · 9 answers · asked by Anonymous in Other - Alternative

2007-08-13 05:52:05 · 10 answers · asked by Anonymous in Physics

If dark matter comprises 25% of the universe's energy and mass total, shouldn't it be easier to find? Is it hard to find because it is....the only word that comes to mind is "Inert"....to interaction with any way we might detect it? Still, as 25% of the universe, wouldn't you expect to bump into a chunk of it now and then?

2007-08-13 05:47:50 · 7 answers · asked by John T 2 in Physics

2007-08-13 05:47:27 · 16 answers · asked by Anonymous in Mathematics

>*Two moons on 27th August 2007*
>
>
>*27th August; the day the Whole World is waiting for ......
>
>Planet Mars will be the brightest in the night sky starting August.
>It will look as large as the full moon to the naked eye. This will
>cultivate On Aug. 27 when Mars comes within 34.65 Million miles of
earth.
>
>
>Be sure to watch the sky on Aug. 27 12:30 am. It will look like the
earth
>has 2 moons.
>
>
>The next time Mars may come this close is in 2287.
>
>
>
>Share this with your friends as NO ONE ALIVE TODAY will ever see it
again.


Somebody posted this on myspace. I wasnt sure if it were actually true. The funny part is, a couple of weeks ago during the full moon when the moon was big and red, people were asking questions on here thinking it were Mars. I thought it was pretty ridiculous! And most of the answers made it seem like it were impossible for Mars to ever be that close, and all of us still be living!? So whats the deal!? True or not?

2007-08-13 05:46:50 · 23 answers · asked by Anonymous in Astronomy & Space