Science & Mathematics - 27 September 2006

2006-09-27 18:02:54 · 17 answers · asked by BonsaiBoy 2 in Physics

Investing her bonus. Melanie invested her $33,000 bonus and received a total of $970 in interest after one year. If part of the money returned 4% and the remainder 2.25%, then how much did she invest at each rate?
Teacher:
Minus 1 for no problem setup.

My answer:
I= $970.00 Interest
P= $33,000.00 Bonus
Equation: I = x(.04) + (P-x)(.0225)
The amount invested at 4%, while P-x is the money she invested at 2.25%.
$970 = x(.04) + 742.5 - .0225x
970 = .04x + 742.5 - .0225x
227.5 = .0175x
x=$13,000.00
Melanie invested $13000 at 4%, and
$33000-$13000=$20000 at 2.25%

Teacher:
Minus 1 for no solution checks.
Don't get how to put that into a solution check
Solution check?

2006-09-27 18:02:37 · 1 answers · asked by SCHNITZEL 1 in Mathematics

2006-09-27 18:01:40 · 19 answers · asked by Tony G 1 in Biology

it is said to have chair form and boat form, and they are strain free and torsion free, so can anyone explain me what is torsion free.

2006-09-27 17:58:39 · 2 answers · asked by maulik g 2 in Chemistry

Assume that the n points are spaced so that no 3 line segments have a common intersection point inside the circle.
To start, if the answer is denoted R(n), note that R(2)=2, R(3)=4, R(4)=8

2006-09-27 17:58:05 · 2 answers · asked by Scott R 6 in Mathematics

how do i find domain and range of functions on a graph which does not have any numbers or anything marked on it?
it's kinda hard to explain without a picture (i'll see if i can upload one) but does anyone know a general way to figure it out?

2006-09-27 17:57:32 · 3 answers · asked by sungirl 2 in Mathematics

Like engineers using rapid prototyping technologies to quickly print a 3D designed part (using, say, stereolithography). Would be cool to have a whole region with its mountains in 3D laying on your desk :)

2006-09-27 17:56:57 · 2 answers · asked by 3d-dude 1 in Engineering

if we open the light while driving in light speed ,what's gonna happend?

2006-09-27 17:52:54 · 14 answers · asked by Son 1 in Physics

2006-09-27 17:51:00 · 8 answers · asked by nicole 1 in Other - Science

A submarine dives 83 m at an angle of 18° below the horizontal. What are the two components?
x=___m
y=___m

can you show me how to solve that?

2006-09-27 17:48:37 · 7 answers · asked by tingerpoo 2 in Mathematics

A girl delivering newspapers travels 1 blocks west, 5 blocks north, and then 6 blocks east.

(a) What is her resultant displacement?
______blocks at _____degrees counterclockwise from east.

can you show me how you did it?

2006-09-27 17:47:07 · 5 answers · asked by tingerpoo 2 in Physics

This cheese cake looks so good, but I can't enjoy it, why?

2006-09-27 17:45:55 · 7 answers · asked by pinacoladasundae 3 in Biology

i'm thinking of three or four particular types: phone cameras, disposable cameras, older cameras that use one-time flash cubes, and older cameras that have an integral flash (they can often be found at thrift shops). is there a range of light ouputs? how broad is it, if so? are there different wavelengths of light? are flash cubes still even available? essentially, i'm looking for the cheapest brightest flash (reusable'd be nice), in a hand held, or smaller, size. (i thought physicists might have something to add, here) thanks!

2006-09-27 17:44:20 · 4 answers · asked by altgrave 4 in Physics

a volume in meter cube.. would like to know how to relate this to flow rate

2006-09-27 17:41:32 · 4 answers · asked by Joe 1 in Mathematics

How long do you think it would take ?

2006-09-27 17:39:16 · 7 answers · asked by rob_kneip2003 1 in Mathematics

2006-09-27 17:38:57 · 2 answers · asked by Anonymous in Mathematics

2006-09-27 17:36:43 · 2 answers · asked by littlegirlsexxy 1 in Weather

2006-09-27 17:34:03 · 10 answers · asked by Anthony J 1 in Mathematics

can you please solve following congruence:

5x = 6(mod7)

(where "=" is not the regular equal sign, it represent the congruences)

need an example to do my rest of the problems. thank you.

2006-09-27 17:33:52 · 3 answers · asked by David F 2 in Mathematics

2006-09-27 17:31:28 · 7 answers · asked by Mike W 1 in Engineering

the formula?

2006-09-27 17:31:21 · 4 answers · asked by gogogo 3 in Physics

The problem is:
8x-5=4x+4-2x

my brother came up with -1/6 (-1 over 6) Is that right??? If not can you explain???

2006-09-27 17:29:06 · 13 answers · asked by Anonymous in Mathematics

When getting out of my truck I get schocked always. Getting gun shy so to speak.

2006-09-27 17:28:36 · 5 answers · asked by curious 1 in Other - Science

What is the frequency of an electromagnetic wave (EM) which has an energy of 217 KJ?

use the equation
E=hv
E=energy of wave
h=6.63x10^-34
v=frequency (waves per second)

is the answer 3.3x10^-30?
or is it 3.3x10^-33?

2006-09-27 17:28:17 · 2 answers · asked by Anonymous in Chemistry

2006-09-27 17:27:59 · 14 answers · asked by Ben L 1 in Biology

2006-09-27 17:26:54 · 8 answers · asked by Anonymous in Other - Science

should it be AISO4

2006-09-27 17:26:15 · 8 answers · asked by xiy 3 in Chemistry

2006-09-27 17:22:25 · 11 answers · asked by Anonymous in Botany

Complex analysis(under Harmonic Functions)

2006-09-27 17:22:14 · 2 answers · asked by Anonymous in Mathematics

I can't find an archaeology category, so I am hoping there are some experts perusing this category.

Something I always wondered - civilisation is supposed to have started up in the fertile triangle around the Persian Gulf, or rather in the region of the twin rivers of the Tigris and Euphrates, in present day Iraq. But just prior to civilisations rise, the ice age locked up so much water that the sea-level was up to 100m lower than present, making most of the current Persian Gulf a dry plain, with those great rivers (maybe as one large river) running down almost to what is now the straits of Hormuz.

So, has nobody thought of searching the floor of the Persian Gulf for any evidence of a pre-civilisation. The dry bed of what was sea before the ice age would surely have been a wonderfully fertile land.

Also, the breach of the Bosphorous at the end of the ice age has been suggested as a possible origin of the Noah story. Why not then the breach of the Straits of Hormuz?

2006-09-27 17:22:12 · 4 answers · asked by nick s 6 in Earth Sciences & Geology