Mathematics - 15 November 2007

2007-11-15 11:13:22 · 3 answers · asked by Desmond R 1

Is it 650 or 750?

2007-11-15 11:05:57 · 11 answers · asked by Hana K 1

2007-11-15 11:00:20 · 9 answers · asked by A H 1

The starting salaries of a random sample of three students who graduated from North Carolina State University last year with majors in the mathematics sciences are $45,000, $35,000, and $55,000.

a. Find a point estimate of the population mean of the starting salaries of all math science graduates at that university last year.

b. There is a margin of error of $24,800 for a 95% confidence interval for the population mean starting income. Construct that interval.

c. Use this example to explain why a point estimate alone is usually insufficient for a statistical inference.

*Notes:
A point estimate is a single number that is our "best guess" for the parameter.

An interval estimate is an interval of numbers within which the parameter value is believed to fall.

A confidence interval is an interval containing the most believable values for a parameter. This is a number chosen to be close to 1, most commonly 0.95.

2007-11-15 10:56:32 · 2 answers · asked by goodguy083 1

2007-11-15 10:54:57 · 4 answers · asked by doglover66 2

So I figured out that the 3 cubic roots are -2, 1+i(square root of 3) and 1-i(square root of 3)

So how do i verify that 1+i(square root of 3) multiplied by 3 is -8?
Is it?

2007-11-15 10:50:09 · 5 answers · asked by Anonymous

2 3/8 * 4 4/5
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7 1/3 * 10 11/12

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8 1/6 * 2 1/4

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1/4 * 5 2/5

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1 1/2 * 5 1/3

2007-11-15 10:48:14 · 20 answers · asked by leer 2

2007-11-15 10:45:55 · 3 answers · asked by Austin G 1

what is the ones digit if 9^55 is expressed as an integer? my calculator doesn't go that far

2007-11-15 10:38:57 · 1 answers · asked by Jack W 1

show all your work and do it you get the best answer.
SHOW YOUR WORK! In numbers not letters.

Simplify If Possible!
9. (x)(7)(5x)
14. -9xy+6x+9xy

Solve!

16. k-1=-11
17. k-5=-9
18. k-2=-13
19. -45=9w
20. -18=-3w
21. 3x+6=12
22. 9x-1=80
23. -3x+6=12
24. 2x+8=14
25. 9x-x=32
26. 10=k-8
27. 30=-2x+8x

2007-11-15 10:38:53 · 4 answers · asked by Shadows Lord 1

2007-11-15 10:29:56 · 8 answers · asked by d 1

2007-11-15 10:21:54 · 1 answers · asked by scotthero 1

For the parabola y = 9/Nx^2 + 2x, find the zeros, vertex V(h,k), axis of symmetry and state how you know whether the optimal value (k) is a minimum or maximum

Plz show your steps in answering this question

Thanks a lot for all your help guys.
Really appreciate it.

2007-11-15 10:21:10 · 2 answers · asked by Supreme_edge 2

There are 9 squares but if you look closely there are 14 you have to reduce the number of squares to 2 by removing eight lines.

2007-11-15 10:02:24 · 5 answers · asked by Nikki 1

multipy!

2007-11-15 10:00:13 · 5 answers · asked by leer 2

First determine the largest set on which
F(x) = (sum from n=1 to infinity) [e^(2nx)/e^(n*x^2)](1-x) converges pointwise. Then find the exact value of (integral from 3 to 4) F(x)dx.

In the first part, i found the interval of convergence as
(minus inf., -2] U (2,inf.). In the second part, i couldn't prove that f n converges uniformly on [3,4]. Can you help me with this?

2007-11-15 09:58:46 · 2 answers · asked by Anonymous

the complex number a+bi is a pure imaginary number when:
1) a=0 and b=0
2) a=0 and b does not =0
3) a does not = 0 and b does not = 0
4) a does not = 0 and b = 0

wat is the answer and why....please explain i dont understand the question....thanx for any help in advance

2007-11-15 09:57:10 · 8 answers · asked by Desilicious 1

A spiral toy that can bounce down a flight of stairs is made from 80 feet of wire. Write and solve an equation to find how many of these toys can be made from a spool of wire that contains 4000 feet.

2007-11-15 09:50:01 · 3 answers · asked by haaaaahaaaa! 1

2007-11-15 09:46:22 · 21 answers · asked by bubbles 2

Find the acute angle theta in degrees and radians without a calculator

sec theta = 2

thanks in advance

2007-11-15 09:42:45 · 11 answers · asked by XzoeyX 2

VW is the median of a trapezoid that has bases MN and PO, with V on OM and W on PN. If the vertices of the trapezoid are M(2,6) , N(4,6), P(10,0), and O(0,0), find the coordinates of V and W. Our teacher said to use Midpoint to figure it out but thats all she said but im confused can someone out there help?

2007-11-15 09:35:39 · 6 answers · asked by coolgirl1376 3

2007-11-15 09:33:51 · 8 answers · asked by Anonymous

2007-11-15 09:30:13 · 3 answers · asked by J.S N 1

4/2+3x5-2^2

I first solved the exponent, so the new equation is:

4/2+3x5+4

Then I solved the division and multiplication:

2+15+4

which came to equal 21.

Am I right? I don't quite understand this, the answer key I'm using tells me the correct answer is 13.

2007-11-15 09:29:37 · 8 answers · asked by Kay 1

Helpppp.


laskjfd;ls.

2007-11-15 09:29:20 · 5 answers · asked by Mariah M 1

A circular coffee table has a diameter of 5ft. What will it cost to have the top refinished if the company charges $3 per square foot for the refinishing?

2007-11-15 09:26:08 · 4 answers · asked by Bnbadangel 1

Explain each step and check.

2007-11-15 09:24:00 · 2 answers · asked by Anonymous

2007-11-15 09:23:24 · 5 answers · asked by yashar a 3

f'(x)= (8/x^2) - (4/x^6)

fins f(x) when f(1)=0

2007-11-15 09:21:55 · 3 answers · asked by Lauren 1

When solving an exponent such as -2^2, would you multiply by -2x-2, or -2x2? So in other words, do you have to multiply by a negative exponent for each?

2007-11-15 09:18:42 · 5 answers · asked by Kay 1