Mathematics - 25 June 2007

The actual voltages of power packs labeled as 12 volts are as follows: 11.77, 11.90, 11.64, 11.84, 12.13, 11.99, and 11.77. The critical value for a 99% confidence interval for this sample is ________.

2007-06-25 08:21:29 · 4 answers · asked by Anonymous

What is the larger number?
10

14

17

2007-06-25 08:20:30 · 6 answers · asked by Anonymous

In 1776 the USA got it right when they adopted the decimal system for their coinage. When will they finish the job and adopt the rest of the metric system?. Converting pounds to ounces, feet to yards, pints to gallons just doesn't make that much sense compared to simply multiplying or dividing by ten.

2007-06-25 08:20:25 · 11 answers · asked by smilingmick 5

2007-06-25 08:18:34 · 7 answers · asked by sashlee j 1

how can i tell which one is which???

5x2 + 10x = -5

one real double root
two real distinct roots/solutions
no real roots

2007-06-25 08:16:13 · 8 answers · asked by Anonymous

can someone please please help me solve this equation... I have been trying to solve it for at least half an hour!!

(½)x2 + 2x + 1 = 0

-2±√2
2±√2
2±√3

2007-06-25 08:14:39 · 6 answers · asked by Anonymous

1. http://i6.photobucket.com/albums/y250/starbase176/hw3.jpg

2. http://i6.photobucket.com/albums/y250/starbase176/hw4.jpg

3. http://i6.photobucket.com/albums/y250/starbase176/hw5.jpg

2007-06-25 08:12:06 · 3 answers · asked by Meda 2

2007-06-25 08:10:26 · 8 answers · asked by Michael H 3

2007-06-25 08:07:50 · 4 answers · asked by Anonymous

On January 8, 10 students come down with the flu. Assume that each day, the number of students who come down with the flu doubles. So, for example,20 students come down with the flu january 9th. Let f(t) repersent the number of students who come down with the flu at t days since January 8.

1 Find an equation for t
2 Find f(7).What does your result mean in terms of the situation.

2007-06-25 07:57:45 · 11 answers · asked by Y ask ME! 2

tickets to the bryce semmesterin concert at the assembly hall cost $18 for A section, $8 for B section and $6 for C section. All 16,000 tickets were sold and total receipts were $112,000. There are twice as many seats in B section as in A section. How many seats are there in section C?

2007-06-25 07:42:05 · 5 answers · asked by Anonymous

im taking AP calculus during my senior year in high school. is it hard? i need advice on the class. thanks in advance!

2007-06-25 07:35:09 · 14 answers · asked by M.O.B 3

The president of a university would like to estimate the proportion of the student population who owns a personal computer. In a sample of 500 students, 417 own a personal computer. A 99% confidence interval for the proportion of student population who own a personal computer is from ________ to ________.

2007-06-25 07:22:25 · 4 answers · asked by jilip_99 1

simpifiy

[ 5x^-3]^-1
_________
[8y^-3]^-1

2007-06-25 07:14:25 · 5 answers · asked by Y ask ME! 2

A study at a college in the west coast reveals that, historically, 45% of their students are minority students. If a random sample of size 75 is selected, the probability is ________ that between 30% and 50% of the students in the sample will be minority students.

2007-06-25 06:42:59 · 7 answers · asked by LG 1

In regards to Math:

1.What makes a problem hard?

2.Can they be harmfull to you, why or why not?

3.If you were a math teacher , would you assign hard problems?

4.Speaking of political correctness and accomidating the disabled; should teachers hold different students to different levels of accountability in regards to critical thinking?

2007-06-25 06:39:04 · 7 answers · asked by LISA R 1

I'm confused.

SOMEHOW I have to:
Step 1. Show the values in the chart.
Step 2. Show the equation.
of this problem...

Alan and Dave leave from the same point driving in opposite directions, Alan driving at 55 miles per hour and Dave at 65 miles per hour. Alan has a one-hour head start. How long will they be able to talk on their cell phones if the phones have a 250-mile range?
***************************
For the chart I have to use:
general headings - rate per item - # of items total - total

So for general headings, I use Alan in one column and Dave in the other. Do I need anything else under general headings? How do I do the rest of the problem? I am so very confused!

THANKS FOR YOUR HELP!

2007-06-25 06:34:11 · 6 answers · asked by DoWHATiDO 3

2007-06-25 06:32:45 · 3 answers · asked by nimia 1

1: x(2x + 1)
3x + 1
4x
2x2 + x
x2 + x


2: 4x(2x2 + x)
8x3 + 4x2
8x3 + x
x + 4x2
x3 + 4x2


3: (x + 1)(x + 4)
4x2 + 4
4x2 + 5x + 4
x2 + 4x + 4
x2 + 5x + 4


4: (x - 2)(x - 3)
x2 - 2x - 6
x2 - 5x + 6
2x2 + 5x + 6
2x2 - 5x + 6


5: (x + 5)(x - 4)
2x2 + x - 20
2x2 + 5x - 20
x2 - 4x - 20
x2 + x - 20


6: (2x + 6)(x - 2)
3x2 - 12x - 12
2x + 2x2 + 2
2x2 + 2x - 12
3x2 + 2x - 12


7: (5x - 5)(5x + 5)
25x2 - 25
25x2 - 25x - 25
10x2 - 50x - 25
10x2 - 25


8: (x2 + 3x)(x + 1)
x3 + 3x2 + 3x
x3 + 4x2 + 3x
2x2 + 4x + 3
2x3 + 4x2 + 3x


9: (9x2 + 5x - 10) (3x + 11)
27x3 + 14x2 + 12x + 110
16x3 + 114x2 + 12x -110
21x3 + 114x2 + 25x + 110
27x3 + 114x2 + 25x - 110


10: (-12x - 7) (-8x2 - 8x - 8)
96x3 + 152x2 + 152x - 56
96x3 + 152x2 + 152x + 56
96x3 + 152x + 56
8x2 - 20x - 15


11: (-9x + 3) (-3x2 - 4x - 4)
x3 + 27x2 + 24x - 12x
-27x2 + 27x2 + 24x - 12
27x2 + 27x3 + 24x - 12x
27x3 + 27x2 + 24x - 12


12: (3x2 + 3x + 10) (12x + 7)
36x3 + 57x2 + 141x + 70
36x2 + 57x + 141x + 70
15x3 + 57x2 + 141x
15x2 + 57x + 141x + 70


13: (-8x - 10) (-3x2 - 12x + 4)
-24x3 + 126x2 + 88x - 40
24x3 + 126x2 + 88x - 40
-3x3 - 20x - 6
-24x3 - 20x - 6


14: (-5) (-8x3 + 6x2 + 3x - 12)
40x2 - 30x2 - 15x + 60
40x3 - 30x2 - 15x - 60
40x3 - 30x2 - 15x + 60
40x3 - 30x2 - 5x + 60


15: (7x + 3) (11x2 + 12x - 9)
11x2 + 19x - 6
x3 + 117x2 - 27x - 27
11x3 + 117x2 - 27x - 27
77x3 + 117x2 - 27x - 27

2007-06-25 06:29:28 · 7 answers · asked by kitara 1

Find the derivative and simplify. f(x)=(x)^1/2-1/(x)^1/2+1

2007-06-25 06:20:43 · 4 answers · asked by annhall90 1

2007-06-25 06:15:35 · 4 answers · asked by Anonymous

The function h described by h(t) = - 16t2 + 33.1t + 124.26 gives the height of a ball thrown upward with a speed of 33.1 feet per second from a 124.26 ft high window t seconds after it is thrown until it hits the ground. Find the height of the ball 1.2 seconds after it is thrown.

2007-06-25 06:01:37 · 4 answers · asked by Dedra A 1

This one took me a while but I finally figured it out...

A guy goes to a bank to cash a check. The teller makes a mistake and switches the dollars and change around (example if the check is $50.12, he gets $12.50 instead). He then spends five cents on a stick of gum and goes home. He counts his money and now has exactly double the amount of what the check should have been. How much was the original amount on the check?

2007-06-25 05:57:18 · 5 answers · asked by lazyjbob 5

2007-06-25 05:53:09 · 12 answers · asked by Anonymous

please help I can figure out the freakin answer

2007-06-25 05:47:43 · 17 answers · asked by JS 1

does anyone know how much my coin is worth its 1935 lincoln coin. its very brownish and looks copper? plz anser if u know.

2007-06-25 05:46:51 · 8 answers · asked by Anonymous

1. the width of a rectangle is three feet less than the length. The perimeter is 10 ft. Find the width.

2. one angle of a triangle is three times another. the third angle is 45 degrees greater than the smallest. find the measure of the smallest angle.

2007-06-25 05:45:46 · 6 answers · asked by What's up people!! 1

Let (X, M u) be a measure space, where X is a set, M is a sigma-algebra on X and u is a measure defined on M. Let f_n be a sequence of functions defined on X and with values on [0, oo] such that lim f_n = f. Suppose that lim Integral f_n du = Integral f du < oo (the integrals taken over X). Show that, for every set E of M, Integral_E f_n du = Integral_E f du, where Integral_E means integral over E. Also, show that this conclusion may fail if we have lim Integral f_n du = Integral f du = oo
Thank you for any help.

2007-06-25 05:35:19 · 3 answers · asked by Anonymous

Of the subjects of a certain king, not all are truthful. In fact, if a subject is selected at random, the probability that he always tells the truth is 2/3. The probability that he never tells the truth is 1/3. The king of this country is trying to decide whom to marry. There are only two possible choices, Princess Anne and Princess Barbara. One day the king whispers to one of his subjects that his choice is Anne. This confidant hastily whispers to another person "The king has chosen ______". Which name he says depends, of course, on whether or not he is truthful. So it goes. Each person, when he hears the rumor, whispers either the name he hears or the other to someone who has not heard. Eventually, 12 people have heard the rumor. What is the probability that the 12th person has heard the truth?

2007-06-25 05:30:58 · 3 answers · asked by aries 2

2007-06-25 05:30:28 · 10 answers · asked by Anonymous