Science & Mathematics - 4 September 2007

use each digit 0,1,2,3,4,5 exactly once to write a decimal subtraction problem.the difference must be the same as one of the decimals in the problem.PLEASE look carefully,if you cant help me thats ok cause i couldnt figure it out either.

2007-09-04 11:51:29 · 2 answers · asked by ladybug101 1 in Mathematics

Name two places or objects where concentric circles appear.

Could someone please help me with this problem. I have no clue what a concentric circles are. Please let me know within 20 mintues. I really appreciate it! Thank you

2007-09-04 11:50:50 · 6 answers · asked by Latrece S 1 in Astronomy & Space

2007-09-04 11:50:28 · 5 answers · asked by . 2 in Chemistry

heres the problem

a set of numbers is said to be closed under a certain operation if, when you perfrom the operation any 2 #s in a set, the result is also in a set.

the set of real #s is closed under addition. This means that when you add any two real numbers, the sum is also a real #

is the set of real numbers closed under subtraction?

2007-09-04 11:48:43 · 3 answers · asked by Cutie-pa-tootie 1 in Mathematics

2 + 5 1/4?
It's a fraction but I can't remember how to solve it.
two plus 5 and one fourths??

2007-09-04 11:45:56 · 13 answers · asked by Anonymous in Mathematics

Simplify m^2-1
-------------
2-m-m^2

Part of a summer assignment. Explanation would be great.
Any response will be greatly appreciated.

2007-09-04 11:42:18 · 5 answers · asked by Luke D 2 in Mathematics

I don't know what this is! I found it on the floor of the sub tropical rain forest next to a river just outside Whangerei in New Zealand. My guess was some kind of fungus - any ideas?

see the pic here:
http://farm2.static.flickr.com/1322/1324834842_7489452d68.jpg

2007-09-04 11:42:16 · 7 answers · asked by boardxs 1 in Botany

For a science lab I need at least 10 males and 10 females' heights in order to do the lab. I'm doing this at home so this is the only way I can do this lab. thank you

2007-09-04 11:32:25 · 11 answers · asked by coolio 2 in Biology

I have one that comes in my back yard. So I do not let my children out at night fall.

2007-09-04 11:30:47 · 6 answers · asked by Anonymous in Zoology

2007-09-04 11:20:46 · 7 answers · asked by Jeffrey M 1 in Mathematics

2007-09-04 11:19:56 · 2 answers · asked by erikck 2 in Physics

...do not intersect.

The discriminants are 16 for the former and -23 for the latter (discriminant is b^2 - 4ac).

My friend said that since the parabola only had an imaginary solution, that it did not cross the x axis, but that doesn't mean they don't intersect.

2007-09-04 11:13:52 · 1 answers · asked by John B 2 in Mathematics

2007-09-04 11:13:13 · 8 answers · asked by spinnyvine 1 in Mathematics

drive on a tankful of gas?

2007-09-04 11:09:03 · 11 answers · asked by kmof6322 1 in Engineering

I was thinking it would be all numbers so it would just be the plane of the graph because no matter what you put in you get 0 = 0 which is true. Is this right?

2007-09-04 11:07:14 · 4 answers · asked by John B 2 in Mathematics

2007-09-04 10:59:41 · 3 answers · asked by ronnie c 1 in Engineering

can u solve Solve 2x^2-3y-5=0 by compleating the square. and can you please show me the steps thanks

2007-09-04 10:58:12 · 2 answers · asked by ajnsdsjafnsafu 1 in Mathematics

I heard it in maths class today and there was:

Write 10,000 to the power of 10 or something like that...

Maths is so confussing!

2007-09-04 10:57:44 · 12 answers · asked by Anonymous in Mathematics

Last fall, a gardener planted 65 iris bulbs. She found that only 56 of the bulbs bloomed in the spring?
a) Find the empirical probability that an iris bulb of this type will bloom
b) How many of the bulbs should she plant next fall if she would like at least 92 to bloom?

2007-09-04 10:56:55 · 5 answers · asked by Tim M 1 in Mathematics

I'm taking an Earth Science Class in college and part of the class is a poster project assigment for the semester. The teacher wants us to make our poster on a ecosystem can someone please help and give some good examples on ecosystems so can have one by this week and let the teacher know

2007-09-04 10:53:57 · 5 answers · asked by Misa 2 in Earth Sciences & Geology

Its alegbra I

2007-09-04 10:53:26 · 3 answers · asked by nrpatel9556@sbcglobal.net 1 in Mathematics

You can go to http://www.mindchallenger.com for brain teasers like this along with answers to some.

George is driving 100 ft/sec toward an intersection. He looks to his right, and sees Bill, driving 30 ft/sec toward the same intersection (they are approaching at right angle towards each other and not head on). George foolishly slams on his brakes. If he had kept going 100 ft/sec, he would have been through the intersection long before Bill got there. At the instant that he slams on his brakes, the center of George's car is 125 ft from the intersection, and the center of Bill's car is 150 ft from the intersection. George's brakes give his car an acceleration of -30 ft/sec/sec. Bill never changes his speed. Each car is 13 ft long and 7 ft wide. Is there a collision?

2007-09-04 10:46:45 · 4 answers · asked by Anonymous in Mathematics

basically, does it have enough delta-v to work with, and if so, are there other problems?

2007-09-04 10:43:46 · 8 answers · asked by modax42 2 in Astronomy & Space

what r 3 ways to show 117649 using powers i need help help me!!!!

2007-09-04 10:42:38 · 5 answers · asked by ♥ CONFIZLED ♥ 3 in Mathematics

I could probably craft my own but it would take for ever getting everything and stuff so.. would buying be okay to? would they work just as fine?

2007-09-04 10:41:59 · 5 answers · asked by kanyewest_fan1 1 in Other - Alternative

2007-09-04 10:41:23 · 4 answers · asked by Louise 1 in Mathematics

Be it mobile phones,sat nav, without wires ect all requires some form of energy,

2007-09-04 10:39:30 · 9 answers · asked by Anonymous in Physics

the trick for squaring something is like square the first, square the second, twice the middle number

is there a trick for cubing something...say (a+h)^3

2007-09-04 10:38:09 · 2 answers · asked by beast 1 in Mathematics

the high energy needed to initiate the reaction.

the high energy needed to sustain the reaction.

the high cost factor involved.

All of the above.

None of the above.

2007-09-04 10:37:41 · 4 answers · asked by Pratikshya M 1 in Chemistry

2007-09-04 10:34:16 · 8 answers · asked by Brenda R 1 in Mathematics