Science & Mathematics - 9 July 2007

2007-07-09 13:04:55 · 10 answers · asked by ar2ch 1 in Physics

I know how to do 23*23 on paper, but not in my head. I only know that it ends with a 9. in my head is this natural???

I know how to remember
1²-17²
17²=289
18²=324
19²=361
20²=400
21²=441
22²=484
23²=beats me

2007-07-09 13:02:34 · 14 answers · asked by Anonymous in Mathematics

The price p dollars and the quantity x sold of a certain product obey the demand equation : x= -15p + 450 ; 0 is less than or equal to p, and p less than or equal to 30. it looks like this with the line under neath 0

2007-07-09 12:59:24 · 1 answers · asked by thepoet01 2 in Mathematics

2007-07-09 12:57:32 · 5 answers · asked by Anonymous in Biology

can u please tell me how to make a radical sign. i can never make it.

2007-07-09 12:57:32 · 2 answers · asked by Butterfly In The Sky 1 in Mathematics

word problem. . . A developer wants to enclose a rectangular grassy lot that borders a city street for parking. If the developer has 200 feet of fencing and does not fence the side along the street, what is the largest area that can be enclosed?

It is an algebra question.

2007-07-09 12:55:47 · 14 answers · asked by thepoet01 2 in Mathematics

And what would you call the capital if you could name it?

2007-07-09 12:51:54 · 36 answers · asked by Kev E 5 in Astronomy & Space

are they the samething but different words?

2007-07-09 12:47:13 · 4 answers · asked by duaa119 1 in Astronomy & Space

2007-07-09 12:46:51 · 6 answers · asked by pete 1 in Botany

Simplify each radical expression, then tell if the result is irrational or rational

√(1/18)

√(5.6)

-4√(7/8)

thanks if you can help!

2007-07-09 12:45:39 · 5 answers · asked by Anonymous in Mathematics

2007-07-09 12:45:09 · 15 answers · asked by kevmom05 2 in Zoology

2007-07-09 12:44:24 · 22 answers · asked by thesunshineking 2 in Astronomy & Space

Find the slope and y-intercept of the lien represented by each of the following equations.

2x-3y=6

2007-07-09 12:43:42 · 4 answers · asked by Dawn M 1 in Mathematics

I'm willing to give a best answer to the first person with the correct answer and who has explained how they did. I have already worked out the problem and I have the correct answer, but I feel like giving a best answer. I'd jump all over this; I appreciate math ^_^

2007-07-09 12:42:52 · 4 answers · asked by Do Anything and I Love Ya! 3 in Mathematics

The H-bombs can reach tempertures up to 200-300 million degrees celsuis. Why cant why create fusion reactors that can do the same?

2007-07-09 12:37:44 · 11 answers · asked by Anonymous in Physics

Victor Anderson, the owner of Anderson Belts, Inc., is studying absenteeism among his employees. His workforce is small, consisting of only five employees. For the last three years he recorded the following number of employee absences, in days, for each quarter.
Quarter
Year I II III IV
2001 4 10 7 3
2002 5 12 9 4
2003 6 16 12 4
Determine a typical seasonal index for each of the four quarters.

2007-07-09 12:36:22 · 2 answers · asked by Help please 1 in Mathematics

is it possible??

2007-07-09 12:35:52 · 4 answers · asked by _cupcakes_ 1 in Mathematics

The depth of a pool varies directly with how many gallons of water it will hold. If a 6 foot deep pool holds 10,000 gallons of water, a pool that holds 12,500 gallons of water should be __________inches deep, according to this theory.

2007-07-09 12:35:40 · 2 answers · asked by froggy 1 in Mathematics

Some students simplify
2x^2 - 32
------------
x - 4
as
2x - 8
--------
bottom cancels out..

Choose the values of x to show this is not true. then simplify it correctly?
how do i do this? im completely lost..

2007-07-09 12:34:22 · 2 answers · asked by Anonymous in Mathematics

Suppose that Cindy rides her bike two miles in the same time it takes Bobby to ride his bike three miles. If Bobby rides his bike 5 mph faster than Cindy, find the speed of each rider.

If it's not too much trouble, could you show your work, so I can understand it better. Thanks.

2007-07-09 12:32:57 · 6 answers · asked by jaz 5 in Mathematics

Boston and New York are approximately 280 miles apart. One Train leaves Boston traveling towards New York at an average speed of 80mph. Another train leaves New York at the same time traveling toward Boston at an average speed of 60 mph. (a) How long will it take them to meet? (b) How far has each train traveled when they meet?

I tried using d= rt but that didn't make much sense since I did
t = d/r which 280/80 = 3.5hours and 280/60 = 4.6 hours but the textbook says two. I'm a so confused. I need help with explanations!!

2007-07-09 12:31:39 · 4 answers · asked by Kala J 3 in Mathematics

if it is 4:00 EDT, what time is that in florida (EST)

2007-07-09 12:31:20 · 2 answers · asked by Anonymous in Geography

Express the surface area S of a cube as a function of its volume V.

I know how to do it..its just the algebra is tricky.

do you do this? : v=x^3 then solve for x, x=3sqrtv

then plug into this s.a. equation: s=6(3sqrtv)^2

then what? (and am i right so far)

2007-07-09 12:28:37 · 6 answers · asked by Anonymous in Mathematics

Just answer the question the best you can

2007-07-09 12:26:51 · 15 answers · asked by Anonymous in Earth Sciences & Geology

What is the integral from '1' to '3' of 'e^(x^2)dx? You must find it using the right endpionts, and 5 rectangles.

I know the formula for right endpoints is the sum of R=1 to 'n' of 'f(XsubR)(change in x)

change in x= (b-a)/n... n is the number if rectangles

2007-07-09 12:25:26 · 2 answers · asked by A 3 in Mathematics

2007-07-09 12:25:12 · 6 answers · asked by DH 1 in Chemistry

2007-07-09 12:22:27 · 1 answers · asked by Anonymous in Biology

2007-07-09 12:21:38 · 5 answers · asked by Anonymous in Biology

The top contributor in Botany has only asked 12 questions in 2 years according to his profile while he has answered tens of thousands!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! What the heck is up with that!?!?!? Is he some kind of extraterrestrial life-form??? No, of course not because an alien would have a lot of questions. It just seems absolutely bizzare to me!

2007-07-09 12:20:22 · 3 answers · asked by Anonymous in Botany

2007-07-09 12:18:38 · 4 answers · asked by shabana d 1 in Weather