Mathematics - 24 July 2006

2006-07-24 23:19:12 · 13 answers · asked by Lovelylady 1

2006-07-24 22:55:02 · 10 answers · asked by Anonymous

P=1,0,0,-1 Q=0,i,-i,0 R=0,1,1,0 in 2 by 2 matrices show that (R,P) = RP - PR = 2iQ
Note: the first two elements are for the first row in that order. e.g. in P=1,0,0,-1.....1 and 0 is first row, while 0 and -1 is second row in that order.

2006-07-24 21:57:05 · 3 answers · asked by Oluyo 1

2006-07-24 21:50:56 · 18 answers · asked by Anonymous

First one to get it right will get best answer.

The sum of the digits 2004 equal 6.
How many digits from 1000 to 9999 equal 6?

2006-07-24 19:36:24 · 14 answers · asked by Anonymous

"Integration of X raised to the power of x with respect to X ?"
all my teachers R unable to answer this question please e-mail me
the solution as soon as possible.....

2006-07-24 19:35:29 · 7 answers · asked by ankur 1

2006-07-24 18:53:08 · 6 answers · asked by Anonymous

2006-07-24 18:48:54 · 24 answers · asked by Anonymous

2006-07-24 18:33:32 · 18 answers · asked by Ibrar 4

2006-07-24 18:23:35 · 3 answers · asked by Anonymous

A certain magnifying glass when held 6 in. from an object creates an image that is 10 times the size of the object being viewed. What is the measure of a 20 degree angle under this magnifying glass?

2006-07-24 17:50:14 · 12 answers · asked by shadowpal2 2

∫ (e^-√(x-5))/√(x-5) dx from 0 to 6

aka

6
∫ (e^-√(x-5))/√(x-5) dx
0

2006-07-24 17:36:09 · 3 answers · asked by thekorean2000 4

2006-07-24 17:31:17 · 24 answers · asked by joseacervantes86 1

2006-07-24 17:27:37 · 9 answers · asked by Ms. Diva 1

2006-07-24 17:08:54 · 14 answers · asked by prians 2

tion towards both being skeptical and not reading a question properly as i never said anything about aliens , and it is a fact that crop circles are happening regardless of whose making them.

2006-07-24 17:02:28 · 4 answers · asked by Anonymous

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2006-07-24 16:59:21 · 15 answers · asked by Raymond Chan 2

2006-07-24 16:58:28 · 4 answers · asked by Anonymous

2006-07-24 16:40:49 · 31 answers · asked by Anonymous

Find the dimensions of a rectangle with area 1000 m whos perimeter is as small as possible. I try 1000 = xy and p = 2(x+y) so 1000 = (x-p/2)(y-p/2). what am i doing wrong?

2006-07-24 16:40:16 · 3 answers · asked by Anonymous

2006-07-24 16:40:10 · 2 answers · asked by Anonymous

2006-07-24 16:39:52 · 8 answers · asked by Anonymous

for example: if you took the head of a pen and moved it exactly half distance to a piece of paper everytime you moved the pen, would that pen head eventually hit that paper?

2006-07-24 16:37:21 · 19 answers · asked by Jeffrey C 1

The half-life of radioactive potassium is 1.3 billion years. If 10 grams is present now, how much will be present in 100 years? 1000 years?

2006-07-24 16:23:18 · 7 answers · asked by Monica S 2

N (t) = 1000e0.01t. After how many hours will the population equal 1500? 2000?

Also, if Iodine 131 is a radioactive material that decays according to the function
A(t) = A0 e-0.0244t where A0 is the initial amount present and A is the amount present at the time t (in days).
a)What is the half-life of iodine 131?



b) Determine how long it takes for 100 grams of iodine 131 to decay to 10 grams.

I REALLY NEED HELP WITH LOGS. I don't understand them at all.

2006-07-24 16:22:37 · 2 answers · asked by Monica S 2

I'm stumped on these, I've been able to do some, but the exponent on the outside of the square root is really throwing me off, any help is greatly appriciated. I hope it's readable, typing it out online is rough :), I've included answers for the ones that I was able to work through, although not all of them are complete.

√ = Square Root
^ = Exponent
/ = Numerator/Demoninator

Simplify. Assume that variables can represent any real number.

1) ^3√-8 / x^12
A) -2 / x^3

2) ^5√x^7y^2

3) √25x^6 / 16y^2
A) 5x^3 / 4y

4) (^3√6x)(^3√2y)
A) 2√x/

5) ^5√x^6y^4 / ^5√x^2y^3

6) (^4√xy^2)(√xy)

7) ^5√a^3 / ^4√a^2

8) 7√2 - 3√2
A) 4√2

9) (3 + √x)(7 - 5√x)

10) (√-4)(√-81)
A) 18

11) √48
A) √4√8

12) √36a^2
A) 6a

13) √x^2 - 12x + 36
A) | x - 6 |

14) Rewrite using radical notation: (2ab)^4/5
A) (^5√2ab)^4

15) Rewrite using exponential notation: √6x^2y

16) f(x) = √12 - 3x, determine the domain of f.

17) f(x) = x^2, find f(2 + √6)

18) Rationalize the denominator: √6 / 5 - √5

2006-07-24 15:56:27 · 4 answers · asked by Kevin B 1

let x=y
then x*x=x*y (multiply both sides by y)
then x*x-y*y=x*y-y*y (subtract y*y from each side)
then (x-y)(x+y)=y(x-y) (factor)
then x+y=y (divide both sides by x-y )
then y+y=y (since x=y)
then 2y=y (add like terms)
then 2=1 (divide both sides by y)

2006-07-24 15:50:17 · 14 answers · asked by rst_ca 1

Im studying for a college compass test and have been out of school for a while, i need to brush up on mathematics and writing. Any suggestions on lit to study or tutor sites ecspecially for algebra

2006-07-24 15:48:52 · 6 answers · asked by jnnfr_dnns 1

2006-07-24 15:47:06 · 7 answers · asked by Anonymous

This is for math homework. I need to find an exact solution and then (if possible) use a calculator to find a numerical approximation to the solution.

Can an exponent be a fraction?

2006-07-24 15:41:58 · 13 answers · asked by studentsmom 1