Science & Mathematics - 4 September 2007

May has twice as much money as Nancy. Osman has thrice as much money as May. If the 3 childrenhave $585 in all, how much money does May have?

2007-09-04 02:57:52 · 9 answers · asked by Anonymous in Mathematics

2007-09-04 02:55:11 · 3 answers · asked by Anonymous in Zoology

I know the H gamma line is caused by an electron changing from energy level 5 to level 2, but what ion/atom gives rise to this 434nm line? Is it just atomic hydrogen or is it an ion??

2007-09-04 02:54:38 · 2 answers · asked by Anonymous in Astronomy & Space

A pair of scissors cost $8 less than a knife. If 3 pairs of scissors and 2 knives cost $86, find the cost of 1 pair of scissors.

2007-09-04 02:53:24 · 13 answers · asked by Anonymous in Mathematics

As in, which is the simplest and easiest to get into, with the lowest marks. As i hear its comp engineering. But i dunno, the person who told me is a little odd

2007-09-04 02:51:55 · 13 answers · asked by KoolKid22 2 in Engineering

Thank you to all of those that answered my previous questions. I really appreciate everyone's help.

I have just one more problem that I have been having trouble with.


x / x^2 -4 + 1/ x+2 = 3

2007-09-04 02:50:05 · 4 answers · asked by Anonymous in Mathematics

Using a microscope with a ocular magnification of 5x. With 3 objective lens with magnifications of 6x, 15x, and 50x what is the field of view for the 15x and the 50x magnification

2007-09-04 02:47:23 · 2 answers · asked by damigurl05 1 in Biology

1.If the radius of a cone is increased by 100%, its volume will be increased by what %? how?
2. What should be the length of a rope by which a cow must be tethered to graze an area of 2464 m sq.? how?
3. (sq root of 2 minus 1) upon (sq root of 2 + 1)? how?

2007-09-04 02:47:03 · 4 answers · asked by Anonymous in Mathematics

lim [(√3+x)-(√3)] / x
x => 0

what is the limit?

2007-09-04 02:46:29 · 4 answers · asked by Daniel B 1 in Mathematics

Exponential functions are used to calculate continuously compounding interest rates.

For example, pretend a bank is offering 12% interest, compounding annually.

You would make 12% that year.

If it is compounding monthly, you'd make effectively 1.01^12 = 12.68%

If it is compounding daily, you'd make effectively 1.000328^365 = 12.747%

If you've had calculus, you know about infinite series. If you break the compounding periods down into infinity, to where it is "continuously compounding", it converges to e^r*t. So in our above example, e^.12 = 12.7497%.

This concept is used in a lot of financial markets for asset pricing, etc.

e is also used a lot in statistics.

2007-09-04 02:42:22 · 2 answers · asked by Cat 1 in Mathematics

2007-09-04 02:39:46 · 8 answers · asked by tronic67 1 in Earth Sciences & Geology

How would you explain the decreased enzyme activities below and beyond the optimum pH?

2007-09-04 02:38:28 · 1 answers · asked by cometoid 1 in Chemistry

Explain the operation of an op amp as an inverting summer.

2007-09-04 02:37:19 · 1 answers · asked by Anonymous in Engineering

Why do planets seem to move in relation to earth while stars stay still?

2007-09-04 02:35:56 · 11 answers · asked by desperanzaa// 2 in Astronomy & Space

I don't know how to even start on this one, please help.

Find all real solutions.

(x^2 - x - 22) ^3/4 = 16

2007-09-04 02:29:12 · 4 answers · asked by Anonymous in Mathematics

2007-09-04 02:29:01 · 8 answers · asked by Onika D 1 in Mathematics

What do you think?

2007-09-04 02:26:57 · 13 answers · asked by Anonymous in Astronomy & Space

You have a microscope that has an ocular magnification of 5x. You have 3 objective lens on the microscope which have magnifications of 6x, 15x, and 50x. What is the total magnification of the 3 objective lens

2007-09-04 02:26:36 · 2 answers · asked by damigurl05 1 in Biology

2007-09-04 02:26:13 · 9 answers · asked by Anonymous in Chemistry

2007-09-04 02:25:44 · 4 answers · asked by Ahmed 1 in Mathematics

2007-09-04 02:25:37 · 5 answers · asked by Dragon 1 in Physics

since HE was the FIRST to discover the right-handed, and left-handed molecules in the atmosphere?

2007-09-04 02:21:49 · 6 answers · asked by thewordofgodisjesus 5 in Chemistry

I need help with this problem:

Find the coordinates of the endpoints of a line segment if the coordinates of the other endpoint and midpoint are respectively: (1,-2) and (4,-1).

Thank you.

2007-09-04 02:21:47 · 1 answers · asked by Anonymous in Mathematics

Find (f/g)(x)

=6/x-3/2/x+2
All right?
Now, I can't divide all this!! Help me please!

2007-09-04 02:20:12 · 2 answers · asked by Anonymous in Mathematics

in terms of laboratory chemistry

2007-09-04 02:16:47 · 2 answers · asked by nico 2 in Chemistry

What are the main differences between fermions and bosons

2007-09-04 02:16:21 · 4 answers · asked by walt 2 in Physics

Given the following densities at 25C. magnesium:1.7g/cm3 graphite: 1.8g/cm3 iron: 7.9g/cm3

A block of iron has a mass of 826 g. What is the mass of a block of magnesium that has the same volume as the block of iron?

My answer is 178 g Mg. Is this correct?

2007-09-04 02:14:21 · 4 answers · asked by Dan 2 in Chemistry

On a particular day, a town's electricity usage can be approximated by a sinusoidal function U(t) where t=0 corresponds to midnight. The function has a period of 24 hours and goes from a low of 30,000 kilowatts at 6 A.M. to a high of 60,000 kilowatts at 6 P.M. Write a formula for U(t)

2007-09-04 02:12:44 · 3 answers · asked by Ask or Answer 2 in Mathematics

which of these ores are economically viable to extract copper from? Chalcocite , Chalcopyrite , Malachite , Cuprite , Tenorite , Bornite ,Azurite , and Chrysocolla. thankz

2007-09-04 02:12:22 · 2 answers · asked by The MD 2 in Chemistry

Find a number so that when you move the first digit to the last position, the result is 1.5 times the original number.

2007-09-04 02:10:33 · 3 answers · asked by Anonymous in Mathematics