Mathematics - 16 December 2007

2007-12-16 13:40:11 · 4 answers · asked by beautiful.light 1

help

2007-12-16 13:17:21 · 9 answers · asked by Anonymous

2007-12-16 13:14:58 · 2 answers · asked by Anonymous

2007-12-16 13:02:25 · 6 answers · asked by Holly 1

2007-12-16 12:55:30 · 2 answers · asked by Anonymous

you want to estimate the difference in grade point averages between two groupd of college students accurate to within .2 grade point, with probability approximately equal to .95.

if the standard deviation of the grade point measurements is approximately equal to .6,
how many students must be included in each group? (assume that the groups will be of equal size)

2007-12-16 12:55:21 · 2 answers · asked by Anonymous

2007-12-16 12:41:30 · 6 answers · asked by Luis O 1

Can you show me the steps to solve the equation. Thanks

2007-12-16 12:37:07 · 4 answers · asked by Anonymous

A business wants to estimate the true mean annual income of its customers. It randomly samples 200 of its customers. The mean annual income was $52,500 with a standard deviation of $1,800. Find a 95% confidence interval for the true mean annual income of the business’ customers

A business wants to estimate the true mean annual income of its customers. The business needs to be within $100 of the true mean. The business estimates the true population standard deviation is around $2,100. If the confidence level is 95%, find the required sample size in order to meet the desired accuracy

2007-12-16 12:32:33 · 1 answers · asked by firemama 2

I tried applying the mean value theorem (& rolle's th'm) as well as the intermediate value th'm but it isn't making sense. There are no solutions, but I have a sense that one of the above methods should be used to solve this question (I may be wrong). Please help!

2007-12-16 12:26:47 · 2 answers · asked by wnap2003 2

Can someone explain or show me how to figure out this question?

Nancy conjectures that the last digit of the fourth power of an even number is 6.
a) find 2 examples to support the conjecture
b) find a counter -example.

...??

2007-12-16 12:26:01 · 4 answers · asked by NIMsTastic 3

I need help proving if this is true or false:
----------------
For each ε>0, there exists positive integers m and n such that:

0 < n^(1/2) - m^(1/2) - π < ε
----------------

I've messed around with it and I think it's true, but I'm stuck on how to prove it.

2007-12-16 12:25:54 · 2 answers · asked by greeneggs4spam 3

the harmonic mean of 2 numbers, a and b is 2/ 1/a+1/b

The harmonice mean of 3 numbers a,b, and c is
3/ 1/a + 1/b + 1/c

a) simplifyt the expressions for 2 and 3 numbers and find a simplified expression for the harmonic mean of 4 numbers.

b) find the harmonice mean of the numbers 2,3,4,7,9

2007-12-16 12:24:55 · 1 answers · asked by john c 1

y = -1/3x +2

2007-12-16 12:24:42 · 2 answers · asked by Anonymous

2007-12-16 12:21:55 · 2 answers · asked by Anonymous

I'm writing a paper about the mathematician Georg Riemann. I need a clear thesis statement about his life. Could someone please help me?

2007-12-16 11:53:54 · 1 answers · asked by hello. it's me. 4

i just need help STARTiNG...so maybe just like the first 2 steps

2007-12-16 11:51:21 · 10 answers · asked by 1HTOWNGURL 1

i knew how to do this last week :/

2007-12-16 11:50:28 · 3 answers · asked by Anonymous

a.4/7
b.7/4
c.1and4/3
d.4and13

2007-12-16 11:50:02 · 22 answers · asked by Judgement 2

2007-12-16 11:42:02 · 3 answers · asked by Anonymous

2007-12-16 11:35:15 · 3 answers · asked by beautiful.light 1

I've seen a commercial for this where this pen actually helps you with math. What is the name if anyone knows?

2007-12-16 11:30:12 · 7 answers · asked by bleaufire 2

1) A company placed $1,000,000 in three different accounts. It placed part in short-term notes paying 4.5% per year, twice as much in government bonds paying 5%, and the rest in utility bonds paying 4%. The income after one year was $45,500. How much did the company place in each account?

2) A stadium has 49,000 seats. Seats sell for $25 in Section A, $20 in Section B and $15 in Section C. The number of seats in Section A equals the total number of seats in Sections B and C. Suppose the stadium takes in $1,052,000 from each sold-out event. How many seats does each section hold?

3) A change machine contains nickels, dimes and quarters. There are 75 coins in the machine, and the value of the coins is $7.25. There are 5 times as many nickels as dimes. Find the number of coins of each type in the machine.

2007-12-16 11:29:24 · 2 answers · asked by young n' free. 4

I learned this in like 7th grade but can't quite remember how to do it......please help!?!?!!

2007-12-16 11:14:06 · 24 answers · asked by Anonymous

4x^2-6x

x^2-25

step by step please, trying 2 figure this all out

2007-12-16 11:10:09 · 3 answers · asked by tiger b 1

can anyone explain reference triangles for trig functions
example:cos(tan^-1(x/3))
I know you have to use trig and the 4 quadrants drawing some kind of triangle and labeling sides but I need help!

2007-12-16 11:08:14 · 1 answers · asked by bleedcelticgreen34 2

2007-12-16 11:05:39 · 8 answers · asked by Anonymous

I have to do this assignment and I don't get a question

Cleo, Beryl and Eric are the controller, manager and treasurer of a corporation, but not necessarily in that order.
-The treasurer, who is single, earn the least.
-Eric is Beryl's brother in law.
-Eric earns more money than the manager.

______ is the controller, _____ is the manager and, _____ is the treasurer.

thanks for the help!

2007-12-16 11:02:00 · 7 answers · asked by NIMsTastic 3

Suppose that f is a differentiable function, that f(2) = 3 and that 4 < f ' (x) < 6 for all x. Use the Mean Value Theorem to find numbers a and A such that a < f(6) < A.

Could really use some help with understanding how to go about this problem. Thanks.

2007-12-16 10:54:32 · 1 answers · asked by Daniel M 2

2007-12-16 10:50:20 · 2 answers · asked by cjbass21 1