Mathematics - 26 November 2007

Can you help me explain this question to a friend?

A quarter is flipped and one number is drawn from a box containing the numbers 2,4,6,8,10.

What is the probability of getting a tails or the numbers 6 or 10?

2007-11-26 07:56:03 · 5 answers · asked by B H 3

1 5/6+2/7
2. 8/9-5/12
3. 2m/3-4n/5

2007-11-26 07:52:20 · 3 answers · asked by lisa g 1

I have a question that askes:
A bird population is going extinct exponentially. 5 years ago there were 1400 birds, now there are 1000. Using A=Aoe^tk when will the population hit 100?
If someone could set up the formula for me I could solve it, I just don't know where to start.
Thanks

2007-11-26 07:48:44 · 5 answers · asked by Happy Killa Pants 2

2007-11-26 07:48:32 · 4 answers · asked by crazynood_sweet14 1

2007-11-26 07:44:49 · 1 answers · asked by tai 1

1/4 of Mr.Rabbit supporters do not bother to vote.
All of Mrs.Hare supporters vote, but the probabilty that those voters will punch the correct chad is only 2/3.

Who will win the election?

2007-11-26 07:36:40 · 2 answers · asked by Alexander 6

12. Haley and Lindsy disagree about the answer to another problem that Mrs. Johnson assigned. Haley says that (c^2+c)/(c^2) can’t be simplified. Lindsy says that it simplifies to c.

What do you think?

A Haley is right because nothing cancels.
B Lindsy is right because c^2 cancels.
C They’re both right. Either answer is acceptable.
D They’re both wrong. The correct answer is (c+1)/(c)
E They’re both wrong. The correct answer is (2c)/(c^2)

2007-11-26 07:32:46 · 10 answers · asked by Anonymous

what is the negative square root of negative 9?
a. 3
b. -3
c. 3i
d. -3i

2007-11-26 07:32:08 · 7 answers · asked by Anonymous

2007-11-26 07:30:15 · 2 answers · asked by crazynood_sweet14 1

1/2 hour before noon volumes 2 and 3 of encyclopedia were added to the shelf, and volume 1 was removed.

1/4 hour before noon volumes 4,5,6,7 of encyclopedia were added to the shelf, and volume 2 was removed.

1/8 hour before noon volumes 8,9,10,11, 12,13,14,15 of encyclopedia were added to the shelf, and volume 3 was removed.

each time when time remainig was halved, twice as many new volumes were added and 1 next volume removed.

How many volumes reamian on the shelf at 12:01 pm?

2007-11-26 07:21:50 · 6 answers · asked by Alexander 6

2007-11-26 07:11:26 · 2 answers · asked by AlienHallucination 2

2007-11-26 07:06:00 · 4 answers · asked by Anonymous

a(y-b)=y

2007-11-26 07:04:09 · 6 answers · asked by Anonymous

i have to find the integral

S dx / (a^2 - x^2)^1/2

= S 1 / (a^2 - x^2)^1/2 dx

= S 1 / ((a+x)(a-x)^1/2) dx

this is as far as i have managed to take it.
where do i go from here?

2007-11-26 07:03:05 · 2 answers · asked by fpa06mr 5

4. Imagine you are at a car dealership that has 1000 vehicles, all locked.
Suppose a salesperson goes along and unlocks every car.
Another salesperson then goes along and locks every other vehicle beginning with vehicle number 2 (yes, the vehicles are all numbered).
A third salesperson changes the state of every third vehicle beginning with vehicle number 3. (If the vehicle is locked the salesperson unlocks it, and if the vehicle is unlocked the salesperson locks it.)
A fourth salesperson changes the state of every fourth vehicle beginning with number 4.
Imagine that this continues until 1000 salespersons have followed the pattern with the 1000 vehicles. At the end, which vehicles will be locked and which vehicles will be unlocked? Which vehicles have been switched the most frequently? How many vehicles, and which ones, were touched exactly five times? Support all of your choices appropriately.

2007-11-26 07:01:24 · 1 answers · asked by Anonymous

log C = log P + µ log V

thanks

2007-11-26 06:56:37 · 6 answers · asked by Anonymous

N=N◦ eˉλt

the equations hard to write on a computer, its basically... N equals N with a little o down next to it. e to the power of minus lamda t

thanks

2007-11-26 06:54:21 · 2 answers · asked by Anonymous

The rancher had equal number of sheep and cows. When the rancher was asleep wolves slaughtered 1/3 of all sheep, and 1/6 of all cows.

The rancher counted that 60 animals were slaughtered.
How many sheep and cows has the rancher now?

2007-11-26 06:46:01 · 6 answers · asked by Alexander 6

(2x – 3)(3x + 4)

a 6x^2 + x + 1

b 6x^2 – x – 12

c 6x^2 + 17x + 12

d 6x^2 – x + 12



5. Simplify this expression.

3x(2x^2 – 3x + 1)

a –3x^2 + 3x

b 6x^2 – 6x

c 6x^3 – 9x^2 + 3x

d 6x^3 – 6x^2 + 3x



6. Simplify this expression.

2x^3 + 3x^2 – x^3 – x^2 – 1

a x^3 + 2x^2 – 1

b x^3 + 4x^2 – 1

c 2x^2 + x^2 – 1

d 3x^3 + 2x^2 – 1

2007-11-26 06:43:18 · 6 answers · asked by Anonymous

sin(3(pi symbol)/8)

2007-11-26 06:42:00 · 3 answers · asked by bruselee14 1

a^1/a = b^1/b

2007-11-26 06:38:20 · 4 answers · asked by Anonymous

Can you help me explain this problem to a friend?

A box contains the following numbers {1,2,3,4,5,6,7,8}. You randomly choose one number. Find the probability that the number chosen is even or a multiple of 2.

2007-11-26 06:37:19 · 3 answers · asked by B H 3

I'm trying to explain this to a friend. Can you help me?

Two cards are drawn without replacement from a standard deck of 52 cards. What is:

1. Probability 1st card drawn is a heart and the second card is also a heart?

2. Probability 1st card is a Jack and 2nd card is a five?

2007-11-26 06:36:12 · 4 answers · asked by B H 3

after i did the calculations i got 1-2i... can anyone see if this is right?

also, how do i put it into cartesian form?

2007-11-26 06:22:34 · 3 answers · asked by SK 1

2007-11-26 06:18:49 · 5 answers · asked by Andy 2

can anyone show me how to do this problem?

2007-11-26 06:18:34 · 2 answers · asked by SK 1

2007-11-26 06:16:22 · 1 answers · asked by Lexcollect 1

Ok i have been doing this problem for the last 30mins, and i keep having problems. its probrably just me! :)

Ok here it is!

The Question is Find f ' (x) and Simplify

f(x) = 2cos(3x^5)

2007-11-26 06:13:40 · 4 answers · asked by Anonymous

i cant solve this question and its been bugging me
please help!

solve 3^(x+2) = 3^x + 216 for x.

3 to the power of (x+2) = 3 to the power of x plus 216.

2007-11-26 06:12:47 · 2 answers · asked by PeterW 1

Solve The System by the method of substitution

1. {-5x - y = 7, 2x - 3y = 4}

a. (1, 2)
b. (-1,-2)
c. (-2,-1)
d. (2,1)

2. {5x - y = 10, 4x - y = 7}

a. (3,5)
b. (-5,-3)
c. (5, 3)
d. (-3, -5)

2007-11-26 06:08:51 · 2 answers · asked by x x italian baby x x 1