Science & Mathematics - 2 September 2007

I do not know how to find the radii of a sector in a circle if the sector has a perimeter of 7cm and an area of 3sq.cm

2007-09-02 17:49:58 · 5 answers · asked by Anonymous in Mathematics

I drew all the diagonals, but I have to state them. What does that mean to state the diagonals?

2007-09-02 17:47:36 · 2 answers · asked by Jen 4 in Mathematics

Problem No. 1:

x , y
0 , 1
1 , 3
2 , 15
3 , 37
4 , 69
5 , 111

Problem No. 2:

x , y
0 , -3
1 , 4
2 , 65
3 , 234
4 , 565
5 , 1112

How can I find f(x) from them? Is there a general rule or technique that I could use to derive f(x)?

I would much appreciate if you could teach me "how to" derive than give me instant answers.

Thank you very much in advance!!

2007-09-02 17:46:41 · 3 answers · asked by Anonymous in Mathematics

does it fade away when you get older? or does it get more better and more common as you grow older ?

2007-09-02 17:45:31 · 14 answers · asked by Anonymous in Parapsychology

okay so i have to enter this online and i have no idea what it wants me to put. the question is:

What conversion factor could be used to determine how many pounds of apples could be bought for $8.00 if one pound of apples costs $0.79?

i tried entering lbs/dollars but it said it wasnt right

2007-09-02 17:45:22 · 1 answers · asked by red_bullgivesyouwings 2 in Chemistry

2007-09-02 17:43:02 · 4 answers · asked by esha26 1 in Other - Science

our text book says that there are 5 layers of atmosphere viz, troposphere, stratosphere, mesosphere, thermosphere or ionosphere and exosphere. they say that air is very rare in stratophere and they also say that ionosphere is a radio layer (remember: ionosphere is higher than the stratosphere.) sound needs air to travel and there is no air in the stratosphere. how could it reach the ionosphere and be reflected back?

2007-09-02 17:42:46 · 4 answers · asked by SIMONE 5 in Earth Sciences & Geology

Chloroquine is used to treat malaria. Studies have shown that an effective dose for children is 3.5 mg per kilogram (3.5 mg/kg) of body weight, every 6 hours. If a child weighs 31 kg, how many milligrams of this drug should be given in a 36 hour period?

2007-09-02 17:42:33 · 4 answers · asked by Anonymous in Chemistry

x + 3y = 12
–5x – 4y = –16

2007-09-02 17:41:57 · 3 answers · asked by Anonymous in Mathematics

an elephant and a mouse would both have the same weight - zero- in gravitation-free space. If they were moving toward you with the same speed, would they bump into you with the same effect? Explain.

2007-09-02 17:40:53 · 5 answers · asked by stop global warming!!! 1 in Physics

2007-09-02 17:40:08 · 4 answers · asked by J.G 2 in Engineering

I know 1 cm3 of water = 1 mL, but it is true for everything else right? I need 15 g KNO3 but don't have a good scale, and I'm trying to find the volume of 15 g.

2007-09-02 17:39:20 · 3 answers · asked by dustdevil_333 2 in Chemistry

i was wundring wot r d subjects i'll have to choose for year 11 if i wish to to medicine in uni

2007-09-02 17:39:04 · 7 answers · asked by Anonymous in Medicine

when a ball is thrown straight upward in the absence of air resistance, by how does the speed decrease each second?

after it reaches the top and begins its return downward, by how much does it speed increase each second?

how much time is required in going up compared to coming down?

2007-09-02 17:36:30 · 6 answers · asked by stop global warming!!! 1 in Physics

2007-09-02 17:36:15 · 3 answers · asked by Jen 4 in Mathematics

2007-09-02 17:32:40 · 1 answers · asked by treedr 1 in Botany

Give me a simple answer to say to my teacher.

(Dam things so annoying!)

2007-09-02 17:32:27 · 7 answers · asked by Moriarti 2 in Chemistry

Can a ceiling fan lower the temperature in a room with out using the air conditioning unit?

2007-09-02 17:29:40 · 15 answers · asked by Sacmen 1 in Engineering

2007-09-02 17:28:10 · 4 answers · asked by MC 3 in Medicine

if a freely - falling rock were equipped with a speedometer, by how much would its speed reading increase with each second fall?

2007-09-02 17:27:46 · 5 answers · asked by stop global warming!!! 1 in Physics

Y=X, Y=X^(.5) rotate about x=2
Find the volume...

given answering is 8pi/15
however I keep getting -7pi/15

Thanks for much for help !

2007-09-02 17:26:48 · 4 answers · asked by edbiology 1 in Mathematics

2007-09-02 17:25:28 · 6 answers · asked by Anonymous in Mathematics

That is, for whatever reason, they just can't handle "zoo life"?

2007-09-02 17:24:44 · 8 answers · asked by Ehrykkh 3 in Zoology

How do I multiplication with the hundreds and thousands? How do I do long division? How do I add, subtract, multiply, and divide fractions? What's algebra? How do I do mixed numbers, and negative fractions? How do I change a mixed number to a negative fraction and back? What else is good for middle school math? Please explain these things and anything else i should know?

2007-09-02 17:23:46 · 7 answers · asked by soncho 1 in Mathematics

Plz explain in a way comprehendable by a student who has never gone through a rigorous definition of the same. I've gone through some Organic Chemistry books (& some Physics books too), but they are not at all satisfactory to even understand the basic concepts associated. I've also searched in some search engines, but to no avail - they are either wayward, or of a much higher level, not discussing about the basics involved. Also, is there any other form of polarized light? Plz explain. Thanks!

2007-09-02 17:22:09 · 7 answers · asked by Kristada 2 in Chemistry

what is the domain of the following functions

g(x) = 1 - 2x^2

s(y) = 3y/ y+5

f(t) = cubed root of t + 4

f(x)= x-4/square root of x

2007-09-02 17:19:45 · 1 answers · asked by josh h 3 in Mathematics

homework help?

2007-09-02 17:19:00 · 2 answers · asked by Anonymous in Biology

2007-09-02 17:17:47 · 4 answers · asked by Anonymous in Geography

For TCL 780KW and atransformer of 1000KVA

2007-09-02 17:16:49 · 4 answers · asked by Eng Doori 1 in Engineering

2007-09-02 17:16:41 · 14 answers · asked by vijaya s 1 in Mathematics