Science & Mathematics - 30 November 2006

Two figures have a ratio of similarity of 2:5
If the area of the larger is 100 square units, what is the area of the smaller?

My teacher told me the answer is sixteen, but I really need to know the process.

Any help in understandable terms would be GREATLY appreciated.

2006-11-30 12:32:12 · 4 answers · asked by Susie 6 in Mathematics

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What has Alexander Graham Bell invented other than the telephone?

2006-11-30 12:28:41 · 3 answers · asked by Anonymous in Engineering

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please help me with this task:"The length of a rectangle is 1 inch less than twice the width.The area of the r

2006-11-30 12:25:58 · 5 answers · asked by Anonymous in Mathematics

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How Does Mauna Loa effect people near by?

How are people affected by the eruptions???

2006-11-30 12:25:56 · 2 answers · asked by Anonymous in Earth Sciences & Geology

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Another Geography Question!! First one to get it right gets 10 points!!?

Ross, Amundsen, and Bellingshausen are names of seas that border which country? I was thinking Antarctica but that a continent so thanks!

2006-11-30 12:22:56 · 5 answers · asked by Irish Girls Rock 3 in Geography

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Can Someone Help Me With Linear Expression?

Math is not my best subject so I was wondering if any one could explain linear expressions to me. I f possible us this for the example.4a+7-2a+3

2006-11-30 12:22:20 · 2 answers · asked by Loli Pop 1 in Mathematics

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What brand or features should I look for in a microscope for studying bugs?

My daughter who is in 9th grade would like to be an Entomologist. I need suggestions on a manufacturer and which magnifications, I think I need a stereo Binocular. And other information or features would be helpful.

2006-11-30 12:22:18 · 2 answers · asked by tom c 2 in Zoology

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Why the x-intercepts of a quadratic function are the solution to the quadratic equation?

Pls answer this quick....................10 pts.................

2006-11-30 12:21:58 · 2 answers · asked by Sunny 2 in Mathematics

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Today's Special: Any two 1-topping pizzas so that the sum of the diameters is 30 inches for $15.00.?

Problem:
Assuming that the cost of a pizza is proportional to its size, answer these questions.
1. What would be the best choice, in terms of size of pizzas, for you to order, assuming you want as much pizza as possible?
2. What would be the best choice, from the store's perspective, assuming they want to make the smallest amount of pizza for the price?
Set up the appropriate function to model this situation, and specify its domain. Then, use derivaties to answer the questions above.

2006-11-30 12:21:16 · 4 answers · asked by Jennie 1 in Mathematics

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how do you calculate area?

2006-11-30 12:21:15 · 7 answers · asked by mcausey 1 in Mathematics

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Are you good at divison?

If you are then answer these questions.
1. 56 divided by 7.
2. 54 divided by 6.
3. 56 divided by 8.
4. 28 divided by 7.
5. 24 divided by 6.
6. 30 divided by 6.
7. 49 divided by 7.
8. 42 divided by 6.
9. 63 divided by 7.
10. 64 divided by 8.
11. 40 divided by 8.
12. 32 divided by 8.
13. 24 divided by 3.
14. 56 divided by 7.
15. What multiplication fact can help you find 40 divided by 8.

2006-11-30 12:21:06 · 14 answers · asked by Unspeakables 4 in Mathematics

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is it posable to make the speed of light?

2006-11-30 12:20:41 · 11 answers · asked by Liz S 2 in Astronomy & Space

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what kinds of animals usually live in the areas often represented by blue on a map?

2006-11-30 12:18:36 · 4 answers · asked by alex m 1 in Geography

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HELP- Chemistry?

What volume of 6.00 M NaOH is required to contain 1.25 mol of NaOH?

2006-11-30 12:18:34 · 2 answers · asked by Mia16 3 in Chemistry

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help with question before test?

Calculate the flow rate of blood (with density of 1.15 g/cm^3) in an aorta with a cross-sectional area of 2.54 cm^2 if the flow speed is 48.9 cm/s. Ans. in units of g/s.

Also, assume the aorta brances to form a large # of capillaries w/ a combined cross-sectional area of 2720 cm^2. What is the flow speed in the capillaries in cm/s?

2006-11-30 12:17:03 · 1 answers · asked by Dee 4 in Physics

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I need help Balancing & writting these equations...?

Write a Balanced equatiion for each of these:
44 A) Ag2 O (s) >>>
B) Nickel (II) Carbonate >>>>>Nickel (II) Oxide + ?
C) Ammonium Nitrate >>>>> Dinitrogen monoxide + Water
48) A) HCl (aq) + Ca (OH)2 (aq) >>>>
B) Ag2 SO4 (aq) + AlCl3 (aq) >>>>(silver chloride is a precipitate)
C) H2C2O4 (aq) + KOH (aq)>>>>
D) CdBr2 (aq) + Na2S (Aq)>>>(Cadium sulfide is a precipitate)
50 Write a Balanced equation for the complete combustion of each compound:
A) Butene (C4H8)
B) Octane (C8H18)
C) glycerol (C3H8O3)
D) Acetone (C3H6O)
52: Complete these:
A) Al (s) + H2SO4 (aq)>>>>
B) HCl (aq) + Ba (OH)2 (aq)>>>>
C) Au (s) + HCl (aq) >>>>>
54) EACH IS BALANCED BUT "INCORRECT", so correct these:
A) Cl2 + NaI >>> NaCl2 + I
B)NH3 >>> N + H3
C) Na+ O2 >>NaO2
D) 2Mg +H2SO4 >>Mg2SO4 + H2
E) MgCl + CaOH >>> MgOH + CaCl
F) H2 + Cl2 >> H2Cl2

2006-11-30 12:16:14 · 2 answers · asked by truckin_90 2 in Chemistry

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Calculus - Optimization Problem?

A customer wants to know the minimum cost of a water tank that will hold 750 gallons. Your company can make the tank from a rectangular piece of metal which can be rolled into a cylinder with two circular ends welded to the cylinder. The rectangular piece is made of a malleable alloy that costs $2.40 per square foot, but the circular ends can be made of a cheaper metal that costs $1.50 per square foot. Note, there are 7.5 gallons in a cubic foot. What dimensions ensure the lowest cost? What is the lowest cost?

2006-11-30 12:16:07 · 1 answers · asked by John 1 in Mathematics

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what moutain range runs from saint lawrence gulf in canada to the state of alabama?

2006-11-30 12:16:04 · 3 answers · asked by alex m 1 in Geography

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How do you balance Al+NO3(aq)---> Al(NO3)3(aq)+Ag(s)?

2006-11-30 12:15:56 · 2 answers · asked by Kim L 1 in Chemistry

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Can anyone explain to me everything you know about exponents?

I'm having trouble mainly with multiplying/dividing them.

2006-11-30 12:15:47 · 3 answers · asked by Anonymous in Mathematics

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are black diamonds really diamonds?

2006-11-30 12:12:18 · 5 answers · asked by brokylm3 1 in Earth Sciences & Geology

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Geography Question!!! First one with the correct answer gets 10 points!?

What U.S - administered islands were named for their location about halfway between the continents of North America and Asia? Thanks if so please leave a link!

2006-11-30 12:10:54 · 8 answers · asked by Irish Girls Rock 3 in Geography

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what is a use of an ellipse in real life?

it can't be that the orbit of the planets is an ellipse, i know that one already i just can't find another one

2006-11-30 12:07:49 · 14 answers · asked by Anonymous in Mathematics

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Can anyone identify this insect? - very weird!?

Sorry - no photo. My neighbor hacked it to bits thinking it was a scorpion. It was not.
The bug looked like a flesh colored overgrown cricket about 2 1/2" long. It was actually fleshy, not scaly. The head was 1/2" long and about 3/8" thick. At the top center of its body, on the top, was a bumblebee shaped and striped part about 1" long. Could not see if it had a stinger. Again, no scales, very smooth except for the bumblebee part. Didn't seem to be able to fly, just crawl. It was freaky.

2006-11-30 12:07:10 · 5 answers · asked by Anonymous in Zoology

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chemistry question?

How many electrons are shared in a double covalent bond?
a) 4
b) 2
c) 6
d) 1

2006-11-30 12:07:06 · 4 answers · asked by me 1 in Chemistry