Science & Mathematics - 16 October 2006

Replacement times for new Ford Taurus GL automobiles are normally distributed with a mean of 7.1 years and a standard deviation of 1.4 years. Find the probability that seven randomly selected Taurus GL automobiles will have a mean replacement time greater than 7.0 years.

Among U.S. households, 24% have telephone answering machines. If a telemarketing campaign involves 2,500 households, find the probability that more than 650 have answering machines.

2006-10-16 13:12:16 · 3 answers · asked by NONE N 1 in Mathematics

2006-10-16 13:12:14 · 32 answers · asked by ? 3 in Astronomy & Space

it is for my project... anyone have any information, photos, videos, anything about da NASA's hoax... please inform asap

2006-10-16 13:11:01 · 10 answers · asked by Tike 3 in Astronomy & Space

if i have a problem that tell me i need to find the displacement from [2,7] what do i do?

2006-10-16 13:10:55 · 2 answers · asked by crazed1511 1 in Mathematics

I'm having trouble with this problem.::

m-12=3m+4


helP?

2006-10-16 13:09:36 · 6 answers · asked by Captain705 1 in Mathematics

2006-10-16 13:09:10 · 2 answers · asked by Thomas M 2 in Earth Sciences & Geology

2006-10-16 13:08:21 · 2 answers · asked by jeff b 1 in Mathematics

2006-10-16 13:07:22 · 3 answers · asked by jeff b 1 in Mathematics

1. All are wrong.

2. Action: Bat pushes ball backward. Reaction: Earth pulls down on ball. Action: Ball pushes air. Reaction: Air pushes ball.

3. Action: Ball pulls down on Earth. Reaction: Earth pulls up on ball. Action: Air pushes ball. Reaction: Ball pushes air.

4. Action: Earth pulls down on ball. Reaction: Ball pulls up on Earth. Action: Air pushes ball. Reaction: Ball pushes air.

5. Action: Bat pushes ball forward. Reaction: Ball pulls up on Earth. Action: Ball pushes air. Reaction: Air pushes ball.

2006-10-16 13:06:16 · 6 answers · asked by xxlovexx 1 in Physics

A rational number is any number that can be expressed as a ratio in the fraction form a/b, where a and b are _____________ and b is not equal to 0

2006-10-16 13:06:15 · 4 answers · asked by Purity 1 in Mathematics

2006-10-16 13:00:27 · 4 answers · asked by i<3WL 2 in Chemistry

A stone has a mass of 8.0 10-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.83. When the tire surface is rotating at 17 m/s, the stone flies out of the tread. The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Assume that only static friction supplies the centripetal force, and determine the radius r of the tire in meters.

I got 1.55 m but that is wrong. I first found static friction (I got 1.49) then pluggd that in as the centripetal force and got 1.55 for r.

What did I do wrong?

2006-10-16 13:00:19 · 2 answers · asked by Confused 1 in Physics

2006-10-16 13:00:07 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2006-10-16 12:58:08 · 1 answers · asked by teddybears 3 in Physics

2006-10-16 12:57:55 · 5 answers · asked by Anonymous in Mathematics

2006-10-16 12:53:26 · 5 answers · asked by charles p 1 in Earth Sciences & Geology

Please explain how to do this. Give lots of details

A 3-mile cab ride costs $3.00. A 6-Mile cab ride costs $4.80. Find a linear equation that models cost (c) as a function of distance (d).

2006-10-16 12:51:52 · 10 answers · asked by udienowslave90 1 in Mathematics

What is the maximum WAVELENGTH of light capable of REMOVING AN ELECTRON for a HYDROGEN ATOM if n=5?

2006-10-16 12:49:42 · 2 answers · asked by trish 2 in Chemistry

Check my work and sig figs, and tell me if I got this right, thanks!

Calculate the percent ionization of ammonia in a 0.050 M NH3 solution.

okay I got the pKb off a website, it was 4.76, I convert this to Kb by 10^-4.76= 1.7x10^-5

okay, I use the ICE method and come up with x^2/0.050M-x=1.7x10^-5

I solve this for x and get x= 9.13x10^-4 this is my concentration of [OH-]

so % ionization= 9.13x10^-4/0.050= .0183 x 100 = 1.83%

Hows this look?

2006-10-16 12:48:34 · 2 answers · asked by Anonymous in Chemistry

Consider two lines.
Line 1 contains the points (3, 5) and (-1, 5). Line 2 contains the points (2, 4) and (2, 1).
One of these lines is vertical and one is horizontal.
One of these lines has a slope of 0 and the other has an undefined slope.
Calculate the slope of each line and classify as vertical or horizontal.

Remember that slope is "rise over run"

2006-10-16 12:47:51 · 9 answers · asked by lailani l 1 in Mathematics

2006-10-16 12:46:49 · 15 answers · asked by florcha 1 in Medicine

How really does 0.999... = 1? It just boggles my mind thinking about it.

0.999999999999999999999999999999999999999999...

2006-10-16 12:46:08 · 8 answers · asked by Mike S 2 in Mathematics

2006-10-16 12:45:43 · 6 answers · asked by Meg ♥ 1 in Chemistry

2006-10-16 12:44:36 · 10 answers · asked by --->♥<--- 2 in Other - Science

A 0.1025-g sample of copper metal is dissolved in 35 mL of concentrated HNO3 to form Cu 2+ ions and then water is added to make a total volume of 200 mL. Calculate the molarity of Cu 2+

2006-10-16 12:43:08 · 2 answers · asked by Anonymous in Chemistry

2006-10-16 12:42:12 · 3 answers · asked by Meg ♥ 1 in Chemistry

2006-10-16 12:37:59 · 12 answers · asked by darebedaremadd 1 in Astronomy & Space

I'm not too sure if this is in the right place, but my science fair project is being done on Flower Petal Indicators (in simple terms, determining what molecule gives flower petals their color/acid & base thing) My problem is that I have a rough draft due tomorrow and I'm not too sure on what else I can write my paper on. I need around 3 pages. I already have a chunk of information on acids and bases and the pH scale, but it isn't enough for 3 pages. I also need 2 more sources for my bibliography because the minimum is 5 and I have 3. Help? D=

2006-10-16 12:37:48 · 3 answers · asked by Melissa B 1 in Botany

All #s are subscripts:
9.)Cacl2
10.)Na2CO3
11.)Ga(CLO3)3
12.)CuF2
13.)(NH4)3PO4
14.)FeSO4
15.)HG2(NO3)2
16.)NH4NO2
1.)Na2S
2.)NH4Cl
3.)CuF
4.)CuF2
5.)PbSO4
6.)Hg(NO3)2
7.)Al2O3 ( Letter O)
8.)N2O4
9.)H2S (acid name)
10.)HCIO3 ( “”)
Write Formula for each compounds: (thanks if you do!)
11.)Nickel (II) chloride
12.)Cuprous nitrate
13.)Ammonium sulfate
14.)Magnesium nitride
15.)Mercury (I) Sulfide
16.)Carbon monoxide
17.)Nitrogen (III) oxide
18.)Diphosphorus pentoxide
19.)Sulfurous acid
20.)Periodic acid

2006-10-16 12:37:35 · 2 answers · asked by truckin_90 2 in Chemistry

Add one or two crystals of potassium permanganate, KMnO4, to 1 mL of 6M HCl.. the gas is a dark black color..

2006-10-16 12:37:30 · 3 answers · asked by i<3WL 2 in Chemistry