Science & Mathematics - 9 September 2007

simplify please?
it confuses me

2007-09-09 13:18:00 · 7 answers · asked by Ohehybaby. 1 in Mathematics

2007-09-09 13:16:52 · 7 answers · asked by Anonymous in Mathematics

okay i was just messin around in school and i was taking my sisters date of birth (1994) and you can't do less or more. you can divide , subtract, square root, on and on and you have to make 1-20 just using 1 9 9 and 4. its sorta hard i can't figure out 7, 13, 18, and 19.

plz help

2007-09-09 13:16:51 · 2 answers · asked by Anonymous in Mathematics

A tennis ball with a speed of 12.7 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 8 m/s. If the ball is in contact with the wall for 0.01s, what is the average acceleration of the ball while it is in contact with the wall? Answer in units of m/s.

2007-09-09 13:13:54 · 3 answers · asked by Anonymous in Physics

2007-09-09 13:12:58 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Wouldn't it have helped with those dust storms? 425 million each, throw on some wipers. I am not a rocket scientist. Am I just missing something? Too much power to use?

2007-09-09 13:10:52 · 8 answers · asked by david k 2 in Astronomy & Space

So... for a while I thought I had it all figured out. I decided that UV was within the visible spectrum, because florescent things glowed under black lights. I figured that they were all the same. But... they aren't. So now I'm completely confused. What is florescence, how does ultra violet light differ from the light emitted by black lights? Do both Ultra violet and blacklights make florescent things glow? I have a pretty good understanding about light, photons, and colors... but this is a rough spot. Shed some "light" on the subject please.

2007-09-09 13:09:40 · 1 answers · asked by notallchipsarefood 3 in Physics

Given the function f(x)=5 |x-1|, calculate the following values:

f(x+1)
f(x^2+s

Note: Just to clarify, the x-1 is in between absolute value signs

2007-09-09 13:08:39 · 1 answers · asked by Anonymous in Mathematics

also, 2/3a + 9 = 1/3a + 18

2007-09-09 13:07:11 · 11 answers · asked by Right here Right now 1 in Mathematics

There used to be pictures of this in the paper in the fall 'Indian Summer' where I grew up. I found an old picutre my grandfather took 90 years ago of a corn harvest and I've been trying to remember what these were called.

2007-09-09 13:07:06 · 7 answers · asked by kbmoose1 5 in Agriculture

I can't seem to find it on the internet anywhere, and I took calc 3 years ago...

2007-09-09 13:05:52 · 3 answers · asked by Robert P 2 in Mathematics

how to solve integral (x^2+3x)/sqrt(x))dx, plz?

2007-09-09 13:04:26 · 1 answers · asked by Peter L 1 in Mathematics

This problem looks easy, but for some reason I can't get the right answer. If someone could help me (and explain the answer, if possible, please). Thank you!

The radius of Pluto (assumed spherical) is 1.15x10^3 km, and its mass is 1.5x10^22 kg. What is the density of Pluto in grams per cubic centimeter?

2007-09-09 13:03:49 · 5 answers · asked by countrygurl587 3 in Mathematics

2007-09-09 13:00:13 · 13 answers · asked by New Soviet 1 in Astronomy & Space

2007-09-09 12:59:44 · 7 answers · asked by rupi s 2 in Mathematics

2007-09-09 12:57:42 · 2 answers · asked by Anonymous in Chemistry

I need to use the limit definition which is F'(x)= f(x+h)- f(x)/ h to find the equation of the derivative of f givin that f(x) = sin(x). I know the answer is cos(x), but I do not know how to get there. Thanks

2007-09-09 12:55:05 · 2 answers · asked by Sweetness 2 in Mathematics

Also,

-6n - 14 = 18 = 10n

and

7 - 6x > -35

Please show your work.

2007-09-09 12:44:21 · 3 answers · asked by Right here Right now 1 in Mathematics

i'm using a ti 83

all 480 tickets for a school concert were sold. Seats in the front part of the hall cost $6 each, and seats in the back part of the hall cost $4 each. The total receipts were $2530.

This information can be represented by the system f+b=480, 6f+4b=2530

Graph the system to determine the number of tickets sold for each part of the hall.

2007-09-09 12:44:12 · 2 answers · asked by Anonymous in Mathematics

2007-09-09 12:40:54 · 1 answers · asked by Anonymous in Earth Sciences & Geology

Write the Linear equation 2x-5y+z=9 as a function of x and y. Then evaluate the function when x=10 and y=3!!

2007-09-09 12:38:34 · 11 answers · asked by Riddle 1 in Mathematics

A car with a mass of 1300 kg is initially moving at a speed of 40 km/h when the brakes are applied and the car is brought to a stop in 15 m. Assuming that the force that stops the car is constant, find (a) the magnitude of that force and (b) the time required for the change in speed.

If the initial speed is doubled and the car experiences the same force during the braking, by what factors are (c) the stopping distance and (d) the stopping time multiplied? Show your work.

2007-09-09 12:38:18 · 3 answers · asked by Anonymous in Physics

2007-09-09 12:37:21 · 11 answers · asked by Incognito 7 in Paranormal Phenomena

2007-09-09 12:35:09 · 6 answers · asked by Jared M 1 in Engineering

tonya bought two paperback books. One book cost $8.99 and the other $13.99. Sales tax on her purchase was 6%. HOw much change should she recive if she givesthe clerk $25?

2007-09-09 12:34:58 · 17 answers · asked by polkadot07181994 1 in Mathematics

i need 5 good reasons to why math is so important in everyday life for my project.

2007-09-09 12:33:35 · 1 answers · asked by Anonymous in Mathematics

You can find mathematical puzzles and teasers like this one at http://www.mindchallenger.com The answers are there and new puzzles are added at the beginning of each month.

I would like to see the method you use to solve this and determine the numbers for each letter.

EVE/DID = 0.TALKTALKTALK...

2007-09-09 12:33:32 · 2 answers · asked by J S 2 in Mathematics

2007-09-09 12:32:08 · 1 answers · asked by Jade 3 in Botany

2007-09-09 12:31:54 · 14 answers · asked by Right here Right now 1 in Mathematics

f(x)= x-1 / x^2- 4

how do you find domain?

2007-09-09 12:31:45 · 4 answers · asked by snowangels 2 in Mathematics