Mathematics - 10 August 2006

We give 6 cards to a person and ask him to guess their colors in-order and he knows that a half of cards are black and the other half is white. What is the problality of guessing 5 card's color correctly?(give reasons for your answers)

2006-08-10 23:23:27 · 21 answers · asked by parsa g 2

a mother age is 21 years from the age of newborn baby. what will be the age of baby when she is 1/4 that of her mother

2006-08-10 23:01:13 · 16 answers · asked by Anonymous

Can any one give an example where 3.x.c(x+c)+c^3 will be a cube of an integer>1. The value of x and c are >0 and and x,c are integer

2006-08-10 22:16:55 · 4 answers · asked by Jinna 1

A farmer has three fields. One field is an equilateral triangle, one field is a circle, and one field is a square. The square field is 75% larger in area than the triangular field, and 50% larger in area than the circular field. In order to completely fence all three of the fields, exactly 4000 metres of fencing is required.

What is the total area of all three fields, in square metres?

2006-08-10 21:54:28 · 6 answers · asked by Hey Marky 2

There are 4 married couples, out of which, 3 poeple in a group is needed. But there should not be his or her spouse in the group. How many groups are possible?

2006-08-10 21:53:40 · 12 answers · asked by Anonymous

2006-08-10 21:46:23 · 34 answers · asked by fattommy 3

History repeats itself.FINDout why 1908 and 2007 are related years. TUNGASKA INCIDENT IS more likely the SAME as final WAVE .FIND OUT WHY.uSING A LITTLE of math,will arrive to the answer of my question. why ???

2006-08-10 21:44:09 · 3 answers · asked by Anonymous

here are 2 scales of temp A & B. It was given A varies from 14 to 133 and B varies from 36 to 87. Find the temperature, when temperature of A is equal to temp of B.

2006-08-10 21:28:40 · 7 answers · asked by Anonymous

2006-08-10 20:42:38 · 8 answers · asked by Ranagee 1

a.4,4% b.16,7% c.44% d.54%

2006-08-10 20:06:35 · 9 answers · asked by guitarkhongday 1

2006-08-10 19:47:29 · 17 answers · asked by shafi 2

I need to prove that if A and B are matrices such AB and BA exist, and AB is symmetric (so AB = (AB)transpose ), show that AB=Ba.

So far I can prove that AB and BA have the same size, but I can't figure out how to prove that they have the same entries.
Proof of size:
A is m*n, B is n*p. So AB is m*p, but since BA exists too m must = p. So now A is m*n, and B is n*m. This leads to AB being m*m and BA being n*n. And since AB=BA m must = n so all of the mentioned matrices must be n*n in size.
now i just need to prove that the entries of AB and BA are the same.

2006-08-10 19:39:33 · 4 answers · asked by darcy_t2e 3

If it is true (now) that Pi has infinite decimals, then does that mean you can never know EXACTLY what the circumference of a circle is? (2(Pi)r).
Yet you can draw a circle that has an exact length? Or take a string of known exact measurable length and make a circle out of it.

What am I missing?

2006-08-10 19:38:44 · 12 answers · asked by ? 5

2006-08-10 19:20:55 · 11 answers · asked by shafi 2

if given the perimeter and area of the sector are 19 cm and 22.5 cm repectively.

2006-08-10 19:19:47 · 3 answers · asked by Quinne 1

See from where you're sitting? I can see 11, does that mean I need to clean my apt?

2006-08-10 19:12:57 · 11 answers · asked by FastEddie 5

2006-08-10 19:10:33 · 33 answers · asked by Anonymous

I always wondered this.

In math there is addition, multiplication, and powers, and they are reversed with subtraction, division, and logrithms, respectively. They are also connected like this:

in Powers, 4^5 is simply, 4*4*4*4*4,

and in multiplication, 4*5 is simply 4+4+4+4+4

So my question is...is there a function past powers, for example

4^4^4^4^4 can be simplified into a new type of function. Does this type of function exist? Obviously this is a ridiculously large number, but I thought that maybe there might be a theoretical use for it...

2006-08-10 18:48:32 · 3 answers · asked by Anonymous

Why isn't -1 prime?

What is the first prime number formed from the digits of pi. 14, 141, 1415, 14159, ... ?

Is there a formula or easy method to determine how many prime numbers are between a and 2a? a is an integer > 1

2006-08-10 18:36:46 · 6 answers · asked by Michael M 6

2006-08-10 18:35:16 · 12 answers · asked by Anonymous

Here is probibility density function of X & Y (f(x,y)).What would be
f(x) and f(y):

f(x,y):
12/5(x+y) 0 0 otherwise

2006-08-10 18:16:52 · 1 answers · asked by simona 1

Here is probibility density function of X & Y (f(x,y)).What would be
f(x) and f(y):

f(x,y):
12/5(x+y) 0 0 otherwise

2006-08-10 18:13:21 · 2 answers · asked by simona 1

...did she sell?....tod worked on a 2 day project for school...he work a total of 195 minutes..if he worked for 45 mins longer on da first day...how long did tod work each day...?

2006-08-10 18:05:48 · 6 answers · asked by caligirl10191 1

2006-08-10 17:57:43 · 3 answers · asked by lover boy 1

Would anyone be able to help me with this question?

For the polynomial:

P(x)=x^5-x^4-10x^3+2x^2+16x-8, I have been told that two factors are (x-1) and (x+2) and I have to show that one of these is a double factor...how do you do that? I know that a double factor means that it's a perfect square (i.e. (x-1)^2 or (x+2)^2) but that's all...I would really appreciate some help...can anyone explain this to me? Or show me a website that will? Thanks so much! :D

2006-08-10 17:50:03 · 3 answers · asked by >>¤MëgâѤ<< 1

2006-08-10 17:27:29 · 4 answers · asked by caligirl10191 1

a.90% b.70% c.94% d.84%

2006-08-10 17:23:47 · 5 answers · asked by guitarkhongday 1

2006-08-10 17:11:53 · 8 answers · asked by el alba____sox 1

I love explaining that one to the mathematically declined, but see who can whip out a quick proof, and whip out nothing else mind you!!!

2006-08-10 16:49:38 · 15 answers · asked by Anonymous

I took calculus in college(not sure why) and got an A in both semesters but I never understood what it was good for. I just memorized the equations and plugged them in. What does calculus calculate?

2006-08-10 14:25:09 · 32 answers · asked by Anonymous