Science & Mathematics - 20 December 2007

A numismatist (coin collector) decides to divide his coin collection between his children.
The oldest gets 1/2 of the collection,
the next gets 1/4, the next gets 1/5,
and the youngest gets the remaining 49 coins.
How many coins are in the collection?

2007-12-20 01:36:28 · 15 answers · asked by Rod Mac 5 in Mathematics

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for science people?

Which of the following cars is accelerating?
a fast moving car
a slow moving car
a car that is slowing down
a car that is not moving

Nancy is training for a marathon. She jogs 10 miles straight south of her home each morning. It takes her 80 minutes. Assuming she runs at constant speed, what is Nancy’s velocity?
0.125 miles/minute
1.25 miles/minute
12.5 miles/minute
8 miles/minute

Who can rollerblade faster—Jenny, who can go 50 m in 30 s, or Jack, who can go 60 m in 40 s?
Jenny
Jack
They travel at the same speed.
It is impossible to tell with the information provided.

2007-12-20 01:32:58 · 4 answers · asked by haleser3 3 in Mathematics

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Name a posionous egg laying MAMMAL that lives under water?

There is one...

2007-12-20 01:32:44 · 5 answers · asked by Anonymous in Zoology

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How much power (kw) will a 5 MW generator produce in 1 month?

When they say a 5 MW generator what timeframe will it produce 5 MW? Is it an hour, a day??? Unsure of the timeframe so I am not sure how to calculate how many kw it would produce in a month.

2007-12-20 01:30:56 · 7 answers · asked by FamilyMan 1 in Other - Science

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maths help...?

simplfy
3(a+2)-5

2007-12-20 01:23:47 · 8 answers · asked by venom 3 in Mathematics

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if i'm allergic to domestic cats would i be allergic to tigers etc too?

i want to be a zoologist who works with big cats

2007-12-20 01:11:28 · 10 answers · asked by jenny 1 in Zoology

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heres a little warm up for you wonderful math masters?

5-5
Solve each equation by using square roots property
2)x squared -12x + 36 =25
4)9x2squared-24x+16=2
Find the value of c that makes each trinomial a perfect square. Then write the trinomial as a perfect square.
8) x squared-12x+c
Solve each equation by completing the square

10) xsquared + 3x -18=0
12) 2x squared- 3x-3=0
14) x squared+2x+6=0
Solve each equation by competing the square
16) x squared +4x+4=25
18) x squared-9x+81/4=1/4
20)x squared +8x+16=7
22) x squared +12x +36 =5
Find the value of c that makes each trinomial a perfect square then write it as a perfect trinomial square
24) x squared + 16x+c
26) x squared -5x +c
Solve each equation by completing the square
28) x squared -8x+15=0.
30) x2 +2x-6=0
32) 2xsquared +3x-5=0
34) 2x squared +7x +6=0
36) x squared-4x +5=0
38) x squared-10x+28=0

2007-12-20 01:10:33 · 8 answers · asked by Anonymous in Mathematics

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What kind of classes/degrees are good for working with a zoo/sanctuary?

I'd like to be a trainer or keeper, and my university doesn't offer zoology. What other classes/majors should I substitute instead of that?

2007-12-20 01:10:27 · 4 answers · asked by dolltrashed 2 in Zoology

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Were the Phoenix Lights a military project, or a UFO as some people believe it to be?

2007-12-20 01:07:52 · 2 answers · asked by Alycia [♥] 3 in Astronomy & Space

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4w squared -13w +10?

please help

2007-12-20 01:07:06 · 4 answers · asked by Purple_babi 1 in Mathematics

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Is A.I. possible "?"?

Do you think artificial intelligence is possible? Tell me your theory!!!

1. Yes, and we could approach it by...

2. No, it won't be possible because...

3. Your personal point of view...

2007-12-20 01:05:05 · 7 answers · asked by Hello World 2 in Other - Science

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Is there a word for the study of primates?

I'm just wondering. I know there is mammalology, but more specifcally I want to know the ology word for primates.

2007-12-20 00:55:23 · 12 answers · asked by charmacharm24 1 in Zoology

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What really happens in Area 51?

2007-12-20 00:49:39 · 11 answers · asked by Alycia [♥] 3 in Astronomy & Space

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calculate i and the apparent dissociation of CsCL in this solution?

CsCL dissolves in water according to
CsCL(s)===>Cs(aq)+CL(aq)
A 0.121m solution of CsCL freezes at -0.403C calculate i and the apparent dissociation of CsCL in this solution

2007-12-20 00:49:27 · 1 answers · asked by Anonymous in Chemistry

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Do you think that UFO's come come from the sea?

2007-12-20 00:46:31 · 11 answers · asked by Anonymous in Astronomy & Space

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Do you believe in life on other planets? Why?

2007-12-20 00:43:45 · 18 answers · asked by Alycia [♥] 3 in Astronomy & Space

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algebra question...??? (not a problem, but a definition)?

what does it mean when your learning about domain and range when it says next to a graph

"The domain of F(x) is x -6"

or if it says

"The range of F9x) is x -6"?

i do not understand on a graph what it means....o.o

oh, its algebra 2 if that helps anyone

2007-12-20 00:38:47 · 4 answers · asked by sand_illusions 4 in Mathematics

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Do you think in 2 billion years, Earth will still be alive? Or do you think it will die from natural causes?

2007-12-20 00:31:48 · 25 answers · asked by Alycia [♥] 3 in Earth Sciences & Geology