Mathematics - 11 October 2007

And should you play if you are given even-money odds for payout?

You toss 5 coins.
Keep all the heads that show, and toss the remaining coins.
Again keep all the heads that show, and toss the remaining coins.

You win if after any toss all 5 coins are heads.

And if you're really ambitious:
In this version of the game you can toss up to 3 times.
What is the probability of winning if you're allowed to toss up to k times?

2007-10-11 04:54:48 · 3 answers · asked by oscarD 3

i have a ti-89 calculator and for some reason when ever i try to solve a sin or cos or tan it wont solve it for example i enter "sin(1/2)" and instead of the answer it displays "sin(1/2)" what could be causing this...?

2007-10-11 04:52:12 · 2 answers · asked by Kevin N 1

In one book they have given 112/15hrs as 7hrs and 28 min.
How to convert? can any one explain this with a formula. So that it suits to all the problems similar to this.

2007-10-11 04:41:59 · 5 answers · asked by Anonymous

A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 70 cm/s. Find the rate at which the area within the circle is increasing after each of the following. Evaluate your answer numerically.
A. 3 seconds
B. 5 seconds
C. 6 seconds

2007-10-11 04:37:15 · 5 answers · asked by Anonymous

Factor the polynomial completely. If the polynomial is prime, say so.

9bn^3 + 15bn^2 - 14bn

Thanks!

2007-10-11 04:34:29 · 2 answers · asked by Pete 1

lim cos(x)/(1-sin(x))^(2/3)
x tends to pi/2
thanks
is it possible for this limit to be ever found using l'hopital rule?

2007-10-11 04:32:34 · 3 answers · asked by Harsh 2

yes or no

2007-10-11 04:23:05 · 7 answers · asked by onelovetequillia 1

2007-10-11 04:20:35 · 9 answers · asked by jeff f 1

2007-10-11 04:08:30 · 5 answers · asked by jakob.grimm 1

THE ANSWER MUST BE IN INTERVAL NOTATION....

2007-10-11 03:57:52 · 4 answers · asked by jessica r 1

please! and if you can show me how i can check the answer! thnx

2007-10-11 03:42:41 · 11 answers · asked by sarah b 1

lim ΔTC/Δq and TC= 2q^2 + 5q + 5
how calculate lim 2q^2 + 5q + 5/ Δq
Δq→0 ?

thanx

2007-10-11 03:30:10 · 3 answers · asked by aurelijad 1

I've used absolute error for determining the accuracy of temperatures, but with precipitation, which is measured in probablity, I need a different equation. Help?

2007-10-11 03:24:46 · 1 answers · asked by Anonymous

2007-10-11 03:14:32 · 5 answers · asked by referencearea 2

2x > -6 and x - 4 < 3

x + 3 > 2x + 1 and -4x < -8

-6 < x + 3 < 6

-3x > -6 or x - 5 < 2

x - 2 > 2x + 1 or 10 > -2x + 2

2007-10-11 03:12:28 · 3 answers · asked by Zack A 1

if trangle abc is similar to triangle def , ab=3cm , bc=5cm ,
ca=7cm , and the permeter of triangle def is 24 cm , how would you find the lengths of the sides of triangle def

i think that the first triangle has a permeter of 15 cm and you ue this with proportions of the second triangle to find the permeter of triangle def ... but i am having trouble doing the work to find this could someone please show me the work to solve this....

2007-10-11 03:05:41 · 7 answers · asked by Anonymous

2007-10-11 02:53:35 · 2 answers · asked by Anonymous

2007-10-11 02:44:42 · 8 answers · asked by Leonard W 1

find the area of the triangle with coordinates (0,8) (4,4) (0,-2) i hope u elaborate on how i totally forgot how to do it and thanks to all

2007-10-11 02:24:00 · 7 answers · asked by raatorn 1

i think this is how you work it out but i dont know.
2% of £12.59
2% = 0.02
0.02 x 12.50 = 0.25

2007-10-11 02:09:29 · 22 answers · asked by Nat 1

2007-10-11 02:05:59 · 6 answers · asked by Anonymous

I have a question here from the book I have mentioned above

The question is - There are 4 nos between 100 and 1000, which are equal to the sum of the cubes of its digits. Three of them are 153, 371 and 407. Find the fourth no.

The answer is 370.

I still actually didn't get as to how to proceed to solve the problem. Can anyone explain the solution to me.

I found a pattern here - In each of the nos, the transition of the nos from one to the next, results in the change of only one digit

153
} 7
371
} 1
370
} 4
407

But I need a more plausible explanation as to how I can go about solving this and not use mere brute force!

2007-10-11 01:26:20 · 5 answers · asked by scw_0611 1

7x/10 - x/10

2007-10-11 01:16:33 · 9 answers · asked by Joe T 1

2x-6 5x-15
------- * --------- Does * mean divide?
21 21 Not sure how to type
this. the second 21 belongs under 5x-15

2007-10-11 00:50:52 · 5 answers · asked by Joe T 1

whats 4932000 to 3,2 & 1 signifacant figures please anyone i totally forgot about this

2007-10-11 00:28:41 · 9 answers · asked by BestSense 3

How many convenient ways can the number "98" be factored? I have a really hard time trying to find a quick and easy way to factor uncommon numbers.

2007-10-11 00:13:33 · 4 answers · asked by dana c 1

The Height is 9cm and the diameter of the circle is 9cm i think the circumference is 28.3 (1dp)
Also please could you state how you did it
Thanks

2007-10-11 00:06:50 · 5 answers · asked by Dan W 2

2007-10-11 00:04:31 · 6 answers · asked by mmane 1