Science & Mathematics - 15 September 2007

This is my GCSE Maths homework, really struggling on this question, thanks.

2007-09-15 04:54:47 · 10 answers · asked by Anonymous in Mathematics

I don't know how to set-up the problem, nor the procedures for it. The problem is:

Mark invested $6000 at 6% per year. How much money should she invest at 8% per year so that the annual income from the two investments is 7%?

2007-09-15 04:53:21 · 5 answers · asked by dana c 1 in Mathematics

4c^2 - 8cd + 4d^2
= 4c^2 - 4cd - 4cd + 4d^2
= 4c(c - d) - 4d(c - d)
=

2007-09-15 04:53:10 · 3 answers · asked by Anonymous in Mathematics

Easier to maintence, aesthtics (how it looks)

2007-09-15 04:52:10 · 1 answers · asked by Chetan D 1 in Earth Sciences & Geology

Do Earth have booster to circle around the Sun?

2007-09-15 04:50:10 · 9 answers · asked by Anonymous in Astronomy & Space

2007-09-15 04:49:12 · 12 answers · asked by Anonymous in Biology

The Space is empty and how stars stay on their position?

2007-09-15 04:48:03 · 4 answers · asked by Anonymous in Astronomy & Space

2007-09-15 04:45:19 · 9 answers · asked by Anonymous in Mathematics

2007-09-15 04:43:15 · 5 answers · asked by Anonymous in Astronomy & Space

everything on the internet goes on about words I don't understand and confusing stuff and I just need a really basic explanation for them both! As short as possible please

2007-09-15 04:38:41 · 8 answers · asked by funkygurl123 3 in Other - Science

Trying to figure out this joke posted about 10 minutes ago. Want to post at work, but have to have the equations.

**So you want a day off. Let's take a look at what you are asking for. There are 365 days per year available for work. There are 52 weeks per year in which you already have 2 days off per week, leaving 261 days available for work.**

I got this far:
(52 weeks x 2 days off =104 days) (365 days – 104 days OFF = 261 available)

**Since you spend 16 hours each day away from work, you have used up 170 days, leaving only 91 days available.**

•Where did that # come from?

**You spend 30 minutes each day on coffee break which counts for 23 days each year, leaving only 68 days available**

•Can't figure that either

**With a 1 hour lunch each day, you used up another 46 days, leaving only 22 days available for work.**

•Or that

Any help would be great!

Thanks

2007-09-15 04:37:59 · 5 answers · asked by deleriumbliss 4 in Mathematics

The linear equation relating book value and number of years is:

a. BV= -50x + 850
b. BV = -50x + 900
c. BV= -170x + 850
d. BV = -170x + 900

2007-09-15 04:37:43 · 2 answers · asked by shelia.boswell 1 in Mathematics

2007-09-15 04:32:37 · 3 answers · asked by shelia.boswell 1 in Mathematics

It's easy to think of examples of matter converted to energy (combustion, nuclear energy, etc.) but what examples are there of the reverse process?

2007-09-15 04:29:19 · 14 answers · asked by GCB-TO 3 in Physics

2007-09-15 04:29:12 · 5 answers · asked by shelia.boswell 1 in Mathematics

2007-09-15 04:23:04 · 1 answers · asked by Anonymous in Mathematics

2. the hydrochloric acid bottles left out in the laboratory, with time, become covered with white powder. Suggest a possible composition for this powder. Why do the ammonia bottles become less covered than do the HCl bottles?

2007-09-15 04:19:20 · 1 answers · asked by blub 1 in Chemistry

2007-09-15 04:07:57 · 7 answers · asked by Anonymous in Mathematics

pupils so that group A had twice the number of marbles Group B had. Each pupil in Group B had 4 marbles more than each pupil in Group C. If the pupils in Group C received a total of 549 marbles, how many marbles were shared out ?

2007-09-15 04:06:47 · 11 answers · asked by Lim S 3 in Mathematics

i can see some business establishment, clubs, open concert hall aiming a very bright light at the clouds when i they feel bad weather is coming..

2007-09-15 04:05:58 · 2 answers · asked by Anonymous in Weather

a. 34 dm^3 = ____________ mm^3

b. 650,000 cm^2 = ________________ dam^2

c. 60,703 dm^2 = _____________ hm^2

d. 6.9 km^2 = _________ dam^2

e. 7.02 dm^3 _______________mm^3


CHOSE A LETTER > DO PROBLEM (SHOW STEPS)

2007-09-15 04:05:32 · 1 answers · asked by Anonymous in Mathematics

The future value of an annuity is A=$32,000. Periodic payments are made quarterly for 4 years and the annuity earns 8% compounded quarterly. Find the periodic payments?
a. $422.40
b. $1,716.80
c. $2,000
d. $2,160

2007-09-15 04:04:05 · 1 answers · asked by Anonymous in Mathematics

2007-09-15 04:02:07 · 6 answers · asked by Anonymous in Mathematics

1)The solar system is made up of the sun and the planets that go around it.2)the planet closest to the sun is called Mercury.3)the planet next closest to the sun is venus.4) Earth is the third planet and Mars is the fourth.5)The planet farthest from the sun is called Pluto.6)Life on Earth is thought to have begun about three billon years ago.7)For many millions of years, the most common life form was bacteria.8)Scientists have tried hard to understand how plants and animals developed from these simple,one-celled creatures.
7.The passage is made up of two paragraphs.Which sentence begins the second paragraph?
A.4 B.5 C.6 D.7

8.The topic sentence in the first paragraph is number

A.1 B. 2 C.4 D.5

2007-09-15 03:51:25 · 4 answers · asked by toni f 1 in Astronomy & Space

2007-09-15 03:48:31 · 15 answers · asked by Anonymous in Physics

What are two places that are equal distance North and South of the Equator?

2007-09-15 03:43:20 · 3 answers · asked by Systematics 1 in Geography

1. why can a gas be compressed into a smaller volume?

2. why can you not squeeze a liquid into a smaller volume?

3. why can you not stir a solid?

4. what makes a gas exert pressure?

5. why does a gas completly fill its container?

6. why does a solid expand when it is heated?

any help would be great!

thank u!

2007-09-15 03:43:07 · 11 answers · asked by Anne Nonny Mouse 4 in Chemistry

2007-09-15 03:37:18 · 4 answers · asked by Anonymous in Astronomy & Space

2007-09-15 03:36:04 · 1 answers · asked by glady f 1 in Zoology

Its urjent,,, plz explain that answar ,, urjent.

2007-09-15 03:29:09 · 1 answers · asked by ANUJIT ROY 1 in Chemistry