Science & Mathematics - 25 August 2007

Can someone please explain?

2007-08-25 20:12:18 · 6 answers · asked by shayrae_18 1 in Mathematics

Assuming that the person with the general knowledge doesn't spend 24/7 memorizing the facts!

2007-08-25 20:09:23 · 5 answers · asked by spacebendingguy 1 in Other - Science

I really don't know :O

here's an example:

http://www.kumon.ne.jp/english/about/print/k.html

2007-08-25 20:06:08 · 7 answers · asked by Anonymous in Mathematics

2007-08-25 19:45:31 · 6 answers · asked by Anonymous in Astronomy & Space

My brother will be having this procedure this coming Tuesday....if any of you guys know of someone or has experience this yourself…can you please tell me…..just how serious this is and what will happen to his health after its done….the doctors gave some information but it was mostly statistics….I kind of want to know from individuals who lived with it …thanks for taking the time to reply

2007-08-25 19:40:40 · 3 answers · asked by Anonymous in Medicine

A small mat is in the shape of a 225 degree-sector of a circle with diameter 7 m. Find the area covered by the piece of mat.

2007-08-25 19:34:11 · 4 answers · asked by Thereyahgo 1 in Mathematics

The minute hand of a clock is 9.8cm long. How far does its tip move in 25 minutes????

2007-08-25 19:31:31 · 6 answers · asked by Thereyahgo 1 in Mathematics

(a)Find for the following function:

(i)y = 4(2x3 – 3x)5
(ii)y =
(iii)y = 5(3x – 1)5(7 – 2x2)6(8 + x3)9
[7 marks]

(b) Find g’(4) given that f(4) = 3, f ’(4) = 4 and g(x) = f(x)
[3 marks]

(c) Suppose that the function f is differentiable everywhere and F(x) = x f(x). Express F(2007)(x) in terms of x and the derivatives of f.
[Note: F(2007)(x) means “the 2007th derivatives of F with respect to x]
[4 marks]

(d) A rectangular plot of land is to be fenced in using two kinds of fencing. Two opposite sides will use heavy-duty fencing selling for $3 a metre, while the remaining two sides will use standard fencing selling for $2 a metre. What are the dimensions of the rectangular plot of the greatest area that can be fenced in at the cost of $6000?
[5 marks]

(e) Find the area bounded by the x-axis and the curve y = x3 – x and the lines x =1, x = 2.
[4 marks]

(f) Suppose that p, q and t are positive. Which of the following two expressions is larger

(a) If 9 140 = + , and 0 < A < B, find the value of B when A is minimum.
[4 marks]

(b) x : y = 5 : 6, and (x – 6) : (y – 6) = 4 : 5. Find the values of x and y.
[4 marks]

(c) Two shops are having sale. Shop A will give their member 20% discount on any item and shop B will give 10% discount on any item and for their member, another 10% discount will be given on the top of the discount price. If you want to buy something during the sale, and you are the member of these two shops, which shops will you go? Support your answer with the calculation.
[4 marks]

(d) At a certain hamburger stand, the owner sold soft drinks out of two 16-gallon barrels. At the end of the first day, she wished to increase her profit, so she filled the soft-drink barrels with water, thus diluting the drink served. She repeated the procedure at the end of the second and the third days. At the end of the fourth day, she had 10 gallons remaining in the barrels, but they contained only 1 pint of pure drink. How much pure soft drink was served in the four days?
[4 marks]

(e) Alan, Ben and Calvin went to a casino. At the beginning of the night, the amount of money each had was in the ratios 7:6:5. At the end of the night, the ratio was 6:5:4. One of the players won $1200. What were the assets of each player at the beginning of the night?
[8 marks]

(f) Harry and his wife Ginny have a vegetable garden and a fruit orchard. Working together they can collect the harvest from the garden in 3 hours, whereas Ginny, working alone, require 12 hours. Furthermore, together they can harvest the orchard in 2 hours, whereas Harry, alone, takes 10 hours. It would seem that to harvest both the garden and the orchard, they should first spend 3 hours in garden and then 2 hours in the orchard, a total of 5 hours in all. However, Harry is much more skillful at picking vegetables and Ginny is better at picking fruit, so that they can save time by having Harry work in the garden and Ginny work in the orchard until one of them finishes. That person would help the other. How much time can they save in this manner?
[6 marks]

2007-08-25 19:22:54 · 2 answers · asked by Anonymous in Mathematics

There are so many what ifs and so many insecure people (in their belief systems). I am tired of the old dogmas and believe many humans will fall behind those that are maturing into the future......but i am afraid that i am obsolete! what if other people are holding onto great truths and the rest of us who don't have access to the info are in the dark. i find i have to act as if (IT) were true. AND then i feel the smallness of the individual self(especially after downloading google sky) and i
both want more in this life and desire the attainment of the universal. i am not confused, i am angry that i have limitations and seethe when my antenae pick up info which might indicate some group of people are hoarding truths about space the way MASONS and others used to hoard truths about the bible and other spiritual info(FOR THEIR BENEFIT!!)

2007-08-25 19:12:53 · 10 answers · asked by soeasytogetalongwith 1 in Astronomy & Space

2007-08-25 19:09:49 · 19 answers · asked by Anonymous in Astronomy & Space

I always have trouble remembering how to differentiate complex powers.

x^2 is easy! Its 2x!

But what happens when you have more powers than that?

What if you have 2^x^2 or 2^x^3^x ???

How do you handle these things?

2007-08-25 19:01:32 · 2 answers · asked by NuclearMessiah 2 in Mathematics

l have trouble navigating google sky.l am trying to focus mainly on the moon but cannot seem to find it.Any one who can help me l willl appreciate it very much.
Many thanks.

2007-08-25 19:00:33 · 3 answers · asked by Ruby Jane 7 in Astronomy & Space

I was just wondering, I dont believe in evelotion, but was wondering what the explenation is for this from your standpoint.

the sun shrinks five feet a day, if the earth is billions of years old, would not the sun envelop, or at least be so big it would burn the earth and the other two planets closer to the sun not exsist?

2007-08-25 18:59:08 · 4 answers · asked by Anonymous in Earth Sciences & Geology

1. For the three summer months (12 weeks), Job A pays $325 per month with a monthly raise of $100. Job B pays $50 per week with a weekly raise of $10. Which is the better paying job?
2. In a supermarket, cans of apple juice are displayed in a pyramid containng 12, 11, 10,..5 cans. How many cans are displayed?
3. Tasty Treats finds that its profit from he sale of ice cream increases by $5 per week during the 15 week summer season. If the profit for the first week is $30, find the profit for the season.
4. The sum of the first 5 terms of an arithmetic series is 85 and the sum of the first 6 terms is 123. Write the first 3 terms of the series.
Than k you

2007-08-25 18:54:03 · 3 answers · asked by Anonymous in Mathematics

a. hypochondriac region
b. iliac region
c. lumbar region
d. epigastric region

2007-08-25 18:48:42 · 4 answers · asked by Ask ME 3 in Biology

2007-08-25 18:44:31 · 12 answers · asked by Anonymous in Mathematics

2007-08-25 18:42:11 · 2 answers · asked by david.jacksonls@sbcglobal.net 2 in Biology

I read that due to vacuum fluctuations one can get a particle and its antiparticle out of nowhere. one particle gets into the black hole while the other doesn't in a fluctuation near a black hole.
As a result we observe as though the black hole has emitted a particle. All this theory was good but the actual happening is that the black hole gained a particle isn't? and a black hole gains extra mass by sucking up the hydrogen near it (the accretion disk).
So how exactly do we say a black hole evaporates?

2007-08-25 18:38:06 · 10 answers · asked by god's pattern 1 in Astronomy & Space

2007-08-25 18:34:52 · 7 answers · asked by Santosh Kumar G 1 in Astronomy & Space

2007-08-25 18:27:38 · 3 answers · asked by miracle123jane 1 in Astronomy & Space

This is one of the questions for a science assignment and I really can't find an answer. I have found many websites explaining about fibre optics but they are too hard to understand. I would appreciate if anyone can help answer me this question in simplest form. Thank you!

2007-08-25 18:27:29 · 8 answers · asked by wicked_7_stars 1 in Physics

How do you find the height where two same marbles have the same velocity when one marble is dropped from the Earths atmosphere (g=9.8) and the other is dropped from the Moons atmosphere (g=1.6)? Both are dropped from the same height

I have absolutely no idea where to start...

2007-08-25 18:27:16 · 1 answers · asked by =] 1 in Physics

2007-08-25 18:22:16 · 4 answers · asked by infochetan 1 in Engineering

2007-08-25 18:18:48 · 7 answers · asked by Dennis K 1 in Mathematics

fossil?

2007-08-25 18:18:38 · 5 answers · asked by Layla 6 in Earth Sciences & Geology

I heard this on Paul Harvey but didn't get the whole story.

2007-08-25 18:04:40 · 5 answers · asked by biggie44 2 in Astronomy & Space

It is a fact that Orca mothers kill Great White Sharks when their babies are around.

2007-08-25 18:01:10 · 7 answers · asked by Anonymous in Zoology

The reason we can't locate ET's is most likely they are in another dimension (there's 12 dimensions) and the exit and re-enter whenever thay want. With that in mind, do they also worship God as their creator since God created all of the universe which also includes the dimensions we can't locate?

2007-08-25 17:59:18 · 9 answers · asked by ZORRO 3 in Astronomy & Space

Would you travel an x number of decades or centuries more into the future to see if earth refurbished itself? If it did, would you fit in?

2007-08-25 17:54:16 · 9 answers · asked by ZORRO 3 in Astronomy & Space

http://www.dailytech.com/Gaping+Hole+Found+in+Universe/article8598.htm

"Many galactic voids exist in space, however, the WMAP Cold Spot Void is an especially unique occurrence considering that it is nearly 1,000 times larger than any other observed void."

I think it's the start of proof that the universe is much much bigger then we currently think, a void like this, it could mean that there are others like it, spread out, heck even all of the known universe could be part of a even bigger universal cluster, and the CMB (Cosmic Microwave Background) could actually fluctuate (it is said to be colder here, why?). I think we have barely touched the tip of space.

2007-08-25 17:47:39 · 7 answers · asked by Nick T 3 in Astronomy & Space