Science & Mathematics - 25 June 2007

A company claims a medication is 92% effective in relieving pain. If 10 ppl who suffer from pain are randomly selected and given the med, and assuming the claim is correct, find the probability that:
a. at least 8 will be relieved of pain
b. exactly 2 of them will not be relieved of their pain

2007-06-25 15:40:01 · 3 answers · asked by sara p 1 in Mathematics

a train goes forward at a speed of 1 m/s for 20 sec.then it stopsand goes backwards at a speed of 0.5 m/s for 4 seconds.after both movements are completed. howfar is the train located from its starting point. (only asking for the trains final location,not the total distancethat it travled) my answer was 19 ? other possible answers are 18 m
20 m 22m

2007-06-25 15:39:32 · 4 answers · asked by treasure 2 in Physics

2007-06-25 15:38:03 · 11 answers · asked by blueeyedbaby41 3 in Zoology

I live in Ohio. I want to see some shooting stars and tonight is a really good night. What is the time between you see them? or how many per hour or whatever.

2007-06-25 15:32:08 · 4 answers · asked by Mark S 1 in Astronomy & Space

can someone please explain to me in ENGLISH what in sam hell is a Black Hole! I read about it, but some reason I can not understand it.

2007-06-25 15:28:01 · 7 answers · asked by Brian K 2 in Astronomy & Space

Carole's hair grows with an average speed of 3.5 x 0.00000001 m/s. How long in years does it take her hair to grow 0.30 m?

2007-06-25 15:24:25 · 2 answers · asked by Tam 1 in Physics

I was sitting in a car with my wife at a red light. As I was waiting I was just casually watching people letting my eyes drift as one normally does without thinking. My attention was drawn to a man that was slightly oddly dressed for the day...a long overcoat with collar turned up...fedora on his head...and a slightly funny gait to his walk. Nothing too strange but just enough to draw my attention to him. He was walking beside a brick wall and all of a sudden he turned to his left and stepped into the solid wall. I turned to my wife to ask her if she had seen it too but was cut short by her question...she said...."Did you see what I just saw?" I said..."There must be a doorway there that isn't visible at this angle...but we both knew it to be untrue. The light turned green and we advanced and sure enough...the wall was solid brick...no way for a person to step out of sight...and yet he did.
Explanations anyone?....and "NO" we are not "weirdos" or "drinkers".

2007-06-25 15:23:24 · 11 answers · asked by cardplayingmom 1 in Other - Science

This year I'm going to AP bio but i dont have the basics of biology so i was wondering if any one who took biology could give me some guideline to Biology

2007-06-25 15:22:19 · 2 answers · asked by Anonymous in Biology

2007-06-25 15:19:06 · 6 answers · asked by Anonymous in Chemistry

2007-06-25 15:16:46 · 2 answers · asked by Anonymous in Geography

When the emergency warning siren at Cheryl's school was tested, the sound from the siren took 7.0 s to reach her house located 2.40 km from the school. What is the speed of sound in air ?

2007-06-25 15:16:16 · 8 answers · asked by Tam 1 in Physics

2007-06-25 15:15:31 · 5 answers · asked by Anonymous in Astronomy & Space

2007-06-25 15:14:29 · 12 answers · asked by Anonymous in Astronomy & Space

0.60 g of CCL4 in 430.0 g of benzene.

given information: BP of benzene = 80.1 C, Kb=2.53, Freezing pt=5.5 C, Kf = 5.12

i don't know if the information is necessary, but my book only shows how to calculate the molality of solute dissolved in water...

thanks

2007-06-25 15:11:24 · 4 answers · asked by Ganbatteru 3 in Chemistry

ensept earth

2007-06-25 15:09:36 · 6 answers · asked by Anonymous in Astronomy & Space

2007-06-25 15:07:48 · 10 answers · asked by Anonymous in Zoology

I need to find the derivative of x^x based on the definition of derivative. Using the limit as h->0. (f(x+h)-f(x))/h I know the derivative based solely on information but i need the step by step derivative based on the definition of derivative taking the limit when h goes to zero. Any help?

2007-06-25 15:03:22 · 6 answers · asked by Chris K 1 in Mathematics

28.5

:::Practice Problems:::

Please answer the following multiple choice questions about the area of polygons and circles. When you are satisfied with your answers, click the 'turn in your test' button to submit your work.


1: Find the area of a triangle with base length 40, height 25, and leg 1 length 30.
32.5
400
500
600


2: Find the area of a rectangle with a diagonal of 13 and longer side of length 12.
30
60
144
156


3: Find the area of a trapezoid with base length 28, height 10, top side 8, and side lengths 12 and 15.
63
180
360
1120


4: A hole is being cut out of a square piece of carpeting with side length 18 feet, for a column 6 feet in diameter. How many square feet of carpeting are there after the piece for the column has been cut out? Round your answer to the nearest tenth.
108.0 sq.ft.
211.0 sq.ft.
295.7 sq.ft.
324.6 sq.ft.


5: A yield sign is an equilateral triangle with 36 inch sides. How many square inches of material are needed to make the sign? Round your answer to the nearest tenth of a square inch.
108.0 sq.in.
324.6 sq.in.
561.2 sq.in.
648.0 sq.in.


6: The area of a trapezoid is 28 square feet. The bases are 5 feet and 9 feet. What is the height of the trapezoid?
4 ft.
5 ft.
6 ft.
9 ft.


7: The school band is selling pennants. Each pennant is cut in the shape of an isosceles triangle with base of 1 foot and height of 4 feet. How many square feet of fabric are needed to make 200 pennants (assuming no waste)?
100
200
400
800


8: Find the area of parallelogram ABCD where AB || CD, AB = 21, AD = 32, and height = 24.
504
672
768
822


9: Tom plans to make strawberry shortcake to take to a party. The recipe calls for a 10 inch diameter round pan. Tom only has an 8 inch square pan, a 9 inch square pan and a 10 inch square pan. Which pan comes closest in area to the one that the recipe suggests?
8 inch
9 inch
10 inch
12 inch


10: A 20 ft. by 15 ft. swimming pool is surrounded by a 2 ft. wide sidewalk. A fence on the edge of the sidewalk encloses the whole pool area. What is the area in square feet inside the fence?
300 sq.ft.
374 sq.ft.
456 sq.ft.
522 sq.ft.


11: What is the area in square feet of only the sidewalk in number 10?
156 sq .ft.
300 sq .ft.
374 sq .ft.
274 sq .ft.

2007-06-25 15:02:46 · 5 answers · asked by Ba'kon 1 in Mathematics

if it makes a difference, i'm in ontario, just looking for a place to search online. hopefully, there is a free site? thanks

2007-06-25 15:02:08 · 3 answers · asked by thing4reason 2 in Other - Science

ensept earth

2007-06-25 15:01:26 · 6 answers · asked by Anonymous in Astronomy & Space

solve B= 4V/N+4t for N.

2007-06-25 14:59:34 · 3 answers · asked by ashley_tisdale2006 2 in Mathematics

Tesla-Man Out of Time, pgs. 45-61 and ff. (the big white edition).

2007-06-25 14:57:56 · 4 answers · asked by comedycatalyst 2 in Physics

physics wise( not gravity)

2007-06-25 14:56:49 · 7 answers · asked by piggy 1 in Physics

i heard that our total blood vessels is enough to encircle the world 2.5 times (about 100,000km), is it true? any source that says so?
and if so, how can we know the distance of the blood vessels from the heart to the eyes?

2007-06-25 14:45:46 · 2 answers · asked by Mel m 2 in Medicine

I'm capable of dividing and doing quick addition, multiplication, square roots, and detect prime numbers without calculating anything. I sense a image like picture of the number out of what seems to be entagled static, which itself feels like nothing more than a poofy thing tat clouds my mind, and the number simply appears.
It's more of a feeling that each number has, and it's almost indescrible. My brain feels funny after doing anything relating to it.
It's not memorization, I wouldn't be asking this question if it was. Are there other people who are able to do this?

2007-06-25 14:39:53 · 5 answers · asked by Anonymous in Mathematics

They look quite similar, but which is the better equipped predator and most efficient hunter? I say leopard

2007-06-25 14:39:16 · 4 answers · asked by Anonymous in Zoology

I took calculus in college, but I forgot it all. Every mathematical dicipline seems to have important concepts, and I just want to know what some of the important concepts or calculus are.

2007-06-25 14:38:42 · 2 answers · asked by Anonymous in Mathematics

Just need a good explanation to see where I am going wrong.

0.05 M CH3COOH

So, CH3COOH + H2O --><-- CH3COO- + H3O+

Ka = [CH3COO-][H3O+] / [CH3COOH]

But isn't [H3O+] in this case (10-5) assumed to be 0 for these calculations? Is there a way to do this without using [H3O+] = sqrt(Ka*conc.Ha) ?

I was trying to figure out if I could calculate it using the Ka formula above.

2007-06-25 14:37:06 · 2 answers · asked by ScienceNut 2 in Chemistry

Is this equation dimensionally correct? ( use the SI unit analysis to find out)

2007-06-25 14:36:56 · 2 answers · asked by Josh Muller 1 in Physics

What influence does an observer have?

Please explain in detail; I'm a bit confused here...

2007-06-25 14:36:31 · 8 answers · asked by LUCKY3 6 in Physics