Science & Mathematics - 23 October 2007

Help me with an algorithm that takes a number and converts it into roman numeral?

hey guys i need help on how to make a program that reads an input number between 1000~3000 and gives you its roman numeral in the console. I have been really having trouble figuring out an algorithm for this. If any of you have tips I'd greatly appreciate it. I know this is really not a math question, but i posted this question in programming & design and got no responses. My second best option was to post in math.

this is similar to what i have to make...

http://www.ivtech.com/roman/

(also, i use dev c++ 4)

2007-10-23 06:37:58 · 5 answers · asked by Axis Flip 3 in Mathematics

2007-10-23 06:35:43 · 4 answers · asked by William R 1 in Biology

A person get's a 100% on his last Organic Chemistry exam, but then he only get a 81% on his Organic Chemistry Laboratory Practical exam. What does this mean? He can learn the material but he doesn't know how to apply it??

2007-10-23 06:35:40 · 4 answers · asked by Anonymous in Chemistry

A particle moves counterclockwise around the ellipse 9x^2+16y^2=25.


a.In which of the four quadrants is the derivative dx/dt positive?
b.Find the relation between dx/dt and dy/dt
c. At what rate is the x-coordinate changing when the particle passes the point (1,1) if its y-coordinate is increasing at a rate of 6 ft/s?
d. What is dy/dt when the particle is at the top and bottom of the ellipse?

I would really appreciate some help with this. Thank You.

2007-10-23 06:32:47 · 3 answers · asked by Anonymous in Mathematics

At constant temperature the pressure on a 3.0 Liter sample of a gas is reduced from 2.0 atm to 1.0 atm. What is the new volume of the gas sample? Any help is appreciated!

2007-10-23 06:29:27 · 2 answers · asked by mellow yellow 2 in Chemistry

given: x is a nonzero real number

a. x2^[to the second power] is positive
b. x > 0
c. - x < 0
d. all of theese

?? help ! thanks!

2007-10-23 06:28:27 · 4 answers · asked by Anonymous in Mathematics

2007-10-23 06:27:50 · 1 answers · asked by Boogie 2 in Mathematics

Hey, a couple of weeks ago I did a physics homework research about the dangers of wireless technology, and I found out quite worrying stuff. It's really annoying because I have wireless internet in my house, and I keep on thinking how the microwaves race through my brain, it's so annoying, could someone please tell me what kind of damage can wireless technology do to me, and how can I prevent it or whatever...

2007-10-23 06:23:48 · 9 answers · asked by summer_lov3 3 in Physics

Flooding Danger

1. During a summer storm, 1 cm of precipitation that used to soak into the ground now falls on a house roof measuring 18x12-m, and from there down the gutters and into a drain. How much water in cubic meters (m^3) goes down the drain?
2. What if it rains to a depth of 1cm on 20 homes (18x12-m roofs), how much goes down the drain in m^3 and gallons?
3. What is the volume of 1-cm rainfall over an area of 401 km^2. What is it in m^3?
4. If urbanization brings precipitation to 90% vs 20% in undeveloped land, how much water goes into the ground, in m^3? (1-cm rainfall over an area of 401 km^2)
5. How can you solve this issue?

2007-10-23 06:23:24 · 2 answers · asked by Soopspoon 3 in Earth Sciences & Geology

Lance and Mario were working in the snack bar at the turbulent tunas concert. they sold hot dogs for $1.65, hamburgers for $2.35, sodas for $0.85 and the combo plate for $3.89. They sold 80 items in an hour for $163.24. How many of each kind of food did they sell? and how much did they make on each kind of food?

Thanx a million! plzzzz show all work!
any help is appreciated! plz help me! what goes around comes around!

2007-10-23 06:20:14 · 3 answers · asked by mathewL 3 in Mathematics

y^4/5 z^2/3 over y^1/5 z

2007-10-23 06:17:13 · 3 answers · asked by starscream 1 in Mathematics

2007-10-23 06:13:43 · 5 answers · asked by Ruby Tuesday 2 in Zoology

Solve the equation: (x+2)/(x+3)-(x^3)/(x^3-9)=1-(x-1)/(3-x)
THANK YOU : D

2007-10-23 06:09:05 · 1 answers · asked by nickole m 1 in Mathematics

2007-10-23 06:08:23 · 5 answers · asked by Anonymous in Mathematics

2007-10-23 06:06:32 · 10 answers · asked by Anonymous in Astronomy & Space

2007-10-23 06:06:29 · 2 answers · asked by tchoxi2000 1 in Mathematics

increasing its size and getting hotter now or later???

2007-10-23 06:03:04 · 13 answers · asked by Anonymous in Astronomy & Space

Determine a quadratic function f(x)=ax^2+bx+c if it admits a maximum euqual to 9 and passes though the points (1,-7) and (-1,-27)

Thank you : D

2007-10-23 06:01:27 · 1 answers · asked by nickole m 1 in Mathematics

On what temperature is water cooling down the slowest (or better, the temperature range)?

And what about air?

Thanks

2007-10-23 05:58:48 · 6 answers · asked by Anonymous in Physics

Well... wtihout involving into other... functionals... or maybe we better consider them too... Well... I am hoping your answers will come handy...

2007-10-23 05:54:13 · 3 answers · asked by Robert M Mrok (Gloom) 4 in Physics

"If you toss 10 fair coins in the air, what is the probability that EXACTLY 5 will land on tails?"

That would be:

.5^10 = answer, right?
Because, although you need 5 tails...you still need the OTHER 5 to be heads...so therefore you still need all 10 to be a specific result...and a probability of .5 for each(heads or tails)...means .5 x .5 x .5 x .5...etc ... or .5^10, right?

And I don't have a scientific calculator, so could someone give me the decimal and/or percentage answer for this?

Thanks!

2007-10-23 05:52:24 · 15 answers · asked by suezzle 3 in Mathematics

seen

2007-10-23 05:51:17 · 17 answers · asked by Anonymous in Astronomy & Space

2007-10-23 05:50:29 · 15 answers · asked by the girl next door 3 in Astronomy & Space

2007-10-23 05:50:22 · 5 answers · asked by Robert M Mrok (Gloom) 4 in Astronomy & Space

2007-10-23 05:47:44 · 7 answers · asked by andy2210 2 in Astronomy & Space

"If the twelve months of the calendar were randomly "shuffled", what is the probability that the first three months "dealt" would each have thirty-one days in them?"

7/12 x 6/11 x 5/10 .....Right? or no?

And also please, what is the decimal and/or percentage answer to this question?

Thanks!!!

2007-10-23 05:47:43 · 4 answers · asked by suezzle 3 in Mathematics

150 sin 377t

2007-10-23 05:47:14 · 4 answers · asked by Wyatt M 1 in Engineering

2007-10-23 05:46:36 · 3 answers · asked by nickole m 1 in Mathematics

Can you tell me exactly which culitivar it looks like??

Also does it suffer from some form of root rot possibly?

There was a bunch of these planted in a row which died. Trying to find out if there is something in the soil which caused it or what.

Thanks for your answers!

2007-10-23 05:39:01 · 6 answers · asked by I like you 1 in Botany

The question is to solve for X by completing the square:

x^2 - 30 = 8x

Serious answers only, please and thank you.

2007-10-23 05:36:55 · 10 answers · asked by Anonymous in Mathematics