Science & Mathematics - 19 January 2007

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1 ⤊

If f is an exponential function, and f(0) = 1,000 and f(1) = 500, find the defining equation for f.?

2007-01-19 09:17:50 · 4 answers · asked by Anonymous in Mathematics

1 ⤊

Is this expression correct?

(2x+x-2)+(-3x+4x+8)
= 4x+6

If not, show me how to do this properly. Thanks!

2007-01-19 09:17:12 · 5 answers · asked by Addicted To Abercrombie & Fitch 2 in Mathematics

1 ⤊

Question down there to big for up here....?

A certain uranium isotope loses 1/8 of its mass every century. (Or, phrased another way, the isotope only has 7/8 of its original mass remaining after a century.) We start with 500 grams of this isotope. Find the defining equation of the function which describes the amount of uranium isotope reamining after x centuries.

2007-01-19 09:17:03 · 4 answers · asked by Anonymous in Mathematics

3 ⤊

How was the aether formed and what matter did it consist of b4 mass formation?

2007-01-19 09:17:00 · 5 answers · asked by goring 6 in Astronomy & Space

5 ⤊

question down there to big for up here...?

You put $5,000 in a bank account which pays 6% interest per year. Find the defining equation of the function f which describes how much money you will have in the bank after x years.

2007-01-19 09:16:28 · 2 answers · asked by Anonymous in Mathematics

0 ⤊

Taking Winstrol?

Is there anybody i can talk to about taking winstrol or can anyone tell me the effects it had, or any side effects

2007-01-19 09:15:42 · 2 answers · asked by Aj M 1 in Medicine

2 ⤊

Did the formation time of the Universe exceed the speed of light?

2007-01-19 09:15:02 · 7 answers · asked by goring 6 in Astronomy & Space

0 ⤊

Prove that the sum of qubes of the integers (i^3) from 1 to n is equal to:(1/4)n^2(n+1)^2?

2007-01-19 09:14:11 · 4 answers · asked by Boehme, J 2 in Mathematics

0 ⤊

Does Einstein Field equation Indicate a static Universe or a moving Universe in orbit just like Milky Way?

2007-01-19 09:13:06 · 3 answers · asked by goring 6 in Astronomy & Space

2 ⤊

Hydrogen Bombs Used?

What were all of the hydrogen bombs used by the U.S., Russia, and England used and what are good web sites to look on for this information?

2007-01-19 09:12:24 · 8 answers · asked by Anonymous in Engineering

5 ⤊

What is group theory?

2007-01-19 09:11:05 · 9 answers · asked by i_love_fawlty_towers 1 in Mathematics

0 ⤊

in the event you had to choose between eatting snot or moldy chees witch would you choose?

2007-01-19 09:10:00 · 15 answers · asked by keith t 1 in Earth Sciences & Geology

0 ⤊

what is lim(x/lnx)+2 when x tends to infinity???

2007-01-19 09:08:48 · 8 answers · asked by Anonymous in Mathematics

0 ⤊

if you where a animal excluding human, witch animal would you be?

2007-01-19 09:08:29 · 3 answers · asked by keith t 1 in Earth Sciences & Geology

1 ⤊

Skeptic? Was there really an explosion per Big Bang theory?

2007-01-19 09:08:26 · 6 answers · asked by goring 6 in Astronomy & Space

2 ⤊

why is maths important to everyday people ?

2007-01-19 09:07:09 · 5 answers · asked by ngoc v 1 in Mathematics

6 ⤊

Order of Operations dilemna (PEMDAS)?

The question I have is this: 6+12/3*2-(4+3)+2^3

If I multiply and then divide I get 9

If I divide first I get 15

Help me out here. Teacher says it is 15. Can someone explain why we are dividing first when using the order of operations? Or am I just missing something else all together?

2007-01-19 09:06:36 · 10 answers · asked by Brandi D 2 in Mathematics

1 ⤊

Which two solutions are better?........?

We all know Carbonated Water(Cola) is bad for our health. Water contains oxygen, the gas we breathe, is drinking Liqiud Oxygen(it does exist) better then water?

2007-01-19 09:06:29 · 6 answers · asked by Anonymous in Chemistry

4 ⤊

The defining equation of the function f is f(x)=10 times 3^x. Find f(2)?

2007-01-19 09:04:38 · 7 answers · asked by haileybaby331 1 in Mathematics

2 ⤊

What does a 4.0 GPA equal to (ex. 100, 90 etc)? 3.0? etc.?

2007-01-19 09:03:04 · 5 answers · asked by <3 1 in Mathematics

3 ⤊

The Sycamore Tree , If it evolved , how did it gather information?

enabling it to develop a seed which utilises airodynamics , balance ,weight , gravity and flight to disperce its seed

2007-01-19 09:02:54 · 6 answers · asked by Anonymous in Botany

4 ⤊

what test can you use to find potassium ions in an aqueous solution?

2007-01-19 09:02:16 · 11 answers · asked by Frankly 2 in Chemistry

0 ⤊

Name two creatures that macroevolutionists claim are intermediate links and why they are not really intermedia

2007-01-19 09:01:32 · 2 answers · asked by edward b 1 in Earth Sciences & Geology

0 ⤊

How does Energy of the big Bang theory form a mass structure architecture and then multiple Galaxies?

2007-01-19 09:00:16 · 1 answers · asked by goring 6 in Astronomy & Space

0 ⤊

Which of the following is a chemical change?

ice melting
ice being carved
water boiling
water breaking down into hydrogen and oxygen

2007-01-19 08:59:46 · 4 answers · asked by aestheticxxlove 1 in Physics

0 ⤊

Can anyone explain the math/concepts for 3D rotation?

I've written a program to rotate objects in 3D. It works good. I could never quite get my head around 3D rotation though. So I figured out 2D first:
1) Start with a point, X,Y
2) Find the angle using ATAN
3) Rotate the angle whatever
4) Recalc and redraw X,Y
Works great

I got really confused when it came to 3D because of the more complex relationships between the different axes.

So I did this:
1) Start with X,Y,Z
2) Find angle for X,Y using ATAN
3) Rotate some
4) Recalc X,Y
5) Find angle for Y,Z
6) Rotate
7) Recalc Y,Z
8) Find angle for X,Z
9) Rotate
10) Recalc and redraw X,Y,Z

I probably did more steps here than I needed, but I had to keep the axes separate so I could visually comprehend what I was doing. Can anyone explain 3D relationships clearly and how the angles/sines/cosines/tangents are related. Can this be done more simply and please explain why.

Also, is there a way to rotate 2D and 3D cartesian coordinates without finding the angles?
Thanks