Science & Mathematics - 7 November 2006

a tower castsa 450ft shadowat the same time that a 4ft child casts a 6ft shadow. Write and solve a proportion to find the height of the tower.

Write 12% 18% 25% 67% and 98% as ratios.

Write those ratios as a decimal


a lighthouse casts a shadow that is 36 meters long. At the same time, a person who is 1.5 meters tall casts a shadow that is 4.5 meters long. Write and solve a proportion to find the height of the lighthouse.

a beach ball holds 800cubic inches of air. Another beach ball has a radius that is half that of the larger ball. How much air does the smaller ball hold?

A rectangle has length 5 centimeters and width 3 centimeters. A similar rectangle has length 7.25 centimeters. what is the width in centimeters of this rectangle?

2006-11-07 13:49:02 · 5 answers · asked by Anonymous in Mathematics

The measures of the five angles of a convex polygon are each equal to 108 degrees. In which of the following five open intervals does the maximum angle of all such polygons lie?

2006-11-07 13:44:33 · 3 answers · asked by Anonymous in Mathematics

2006-11-07 13:43:21 · 6 answers · asked by wes j 1 in Chemistry

2006-11-07 13:42:19 · 17 answers · asked by lougoose 2 in Mathematics

My equation is y - 1 = (x - 3)^2
(x minus 3 quantity squared)
Which I changed to x^2 - 6x + 10

the objective is to find the x\y intercepts and the vertex. The vertex i believe is (3,1) providing my math is correct

THE PROBLEM I am having is that I cannot factor the equation and therefore only know of the quadratic equation for solving for the x\y intercepts... Is this correct? The last problem I had like this was x^2 -2x+3 which i plugged into the quadratic equation and came up with 1 +\- i \/'''''''2
(thats i square root of 2) which hardly seems practical as an x or y intercept. Am I doing this right? Thanks for your help

2006-11-07 13:41:15 · 9 answers · asked by j h 2 in Mathematics

the first is 3x+y=5 and x=2y-3 (consistent), then y=-x+4 and y=-x+2(inconsistent), then y=-x+4 and 2x+2y=8 (dependent). I mean how can someone really tell these are what they are? I kinda now see that the second one has -x+ 2 and -x +4 but dang, someone help put at least two of these into regular english:((

2006-11-07 13:40:11 · 3 answers · asked by Anonymous in Mathematics

ahem....considering that theses creatures lived there and immersed with the concentrated salt of the ocean.....

2006-11-07 13:36:42 · 12 answers · asked by paloloy 1 in Earth Sciences & Geology

2006-11-07 13:36:25 · 8 answers · asked by Car Man 1 in Astronomy & Space

Wires are often covered with____________, because this material is a good conductor.

2006-11-07 13:35:58 · 39 answers · asked by iMaTwin 3 in Other - Science

If a girl has natural black hair, a guy has blonde hair, what hair color would the child have?

2006-11-07 13:34:40 · 4 answers · asked by wcs1885 1 in Biology

where is the stupid squared sign!? lol.

2006-11-07 13:33:16 · 3 answers · asked by Seira T 1 in Mathematics

2006-11-07 13:33:15 · 1 answers · asked by ismit ulam raja 1 in Engineering

a. cytochrome oxidase
b. ubiquinone
c. succinate dehydrogenase
d. RETC NADH dehydrogenase complex

where are each of these found

2006-11-07 13:32:35 · 1 answers · asked by Bleeble Blabble 3 in Biology

A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a proectile at an enemy ship 610 m on the other side of the peak. If the ship shoots the projectile with an initial velocity of 250 m/s at 75 degress, how close vertically) does the projectile come to the peak?

the ansewr is 210 m, but I don't know how to arrive this answer. So please explain this to me step by step if you can. Thank you.

2006-11-07 13:31:39 · 3 answers · asked by Audrey L 2 in Physics

Ok, so if you are going to solve an equation by factoring, how do you know what signs ( positive or negative) to put in the parentheses?

i.e. x2 + 5x - 6 = 0

(x ? 3) (x ? 2)

2006-11-07 13:30:47 · 5 answers · asked by Anonymous in Mathematics

I'm enrolled now in thesis res. but the problem is I do'nt have a topic to begin with. The thesis should be about math since my course is MS Math. If any one out there who can help me and give me the abstract ,you will be a great help.

2006-11-07 13:30:46 · 1 answers · asked by maloumarmalade 1 in Mathematics

The buisness logo for PentaPrints Art Gallry is a regular pentagon.
The perimeter of the regular pen tagon is 32 centimeters.What is the lengthof one sidw of the regular pentagon in centimeters?

2006-11-07 13:27:07 · 12 answers · asked by Nabil K 1 in Mathematics

2006-11-07 13:26:17 · 25 answers · asked by Stevie B 2 in Astronomy & Space

why they named the volcano "kilauea"

2006-11-07 13:25:38 · 2 answers · asked by koala 1 in Earth Sciences & Geology

A garden has five rows of vegetables. Each row is parallel to the row immediately next to it. EXPLAIN why the first row is parallel to the last row.



thank you for help!

2006-11-07 13:23:03 · 9 answers · asked by ♥ 3 in Mathematics

I'm having trouble figuring out how to do this problem. I figured out that the molarity is 0.001 M HCl, but I have no clue how to find its H+ ion concentration.... or its pH.

I don't want just the answers, I need to know how to do the problem so that I can do additional problems as well.

Thanks!

2006-11-07 13:20:29 · 2 answers · asked by Erika S 4 in Chemistry

The question is:
A rancher is planning to build a rectangle corral adjacent to an existing barn that uses all of the 400 feet of fencing material that he has available. What are the dimensions of the corral that would maximize the area of the corral if he plans to use a side of the barn as one side of the corral?

I'd greatly appreceate it if someone explained how to do this answer in plain english and gave the correct answer! =]

2006-11-07 13:19:53 · 3 answers · asked by Jac R 3 in Mathematics

water regulation

2006-11-07 13:19:09 · 2 answers · asked by nina_presiosa_0324 1 in Botany

use thhhis link to see the problem
http://i128.photobucket.com/albums/p199/av611/hgyu.jpg

2006-11-07 13:18:20 · 4 answers · asked by Anonymous in Mathematics

2006-11-07 13:16:35 · 3 answers · asked by Anonymous in Biology

i need help on my chemistry lab report!!!

2006-11-07 13:16:32 · 4 answers · asked by rodrigo i 1 in Chemistry

2006-11-07 13:16:00 · 2 answers · asked by jimbo 1 in Earth Sciences & Geology

2006-11-07 13:15:50 · 3 answers · asked by Jsings 1 in Astronomy & Space

I need help with this problem please.. answer + explanation so I can understand it appreciated... Thanks!

A textbook is suspended on a spring scale in an elvator. Of the following, the scale shows the highest reading when the elevator:

a) moves upward with increasing speed
b) moves upward with decreasing speed
c) remains stationary
d) moves downward with increasing speed
e) moves downward at constant speed

Thank you! also...
the same problem above, but separate question with these choices:

a) moves downward with increasing speed
b) moves downward with decreasing speed
c) remains stationary
d) moves upward with increasing speed
e) moves upward at constant speed

2006-11-07 13:15:32 · 5 answers · asked by Jess 1 in Physics

What is 0.7 of 12.99? please answer.

2006-11-07 13:14:28 · 9 answers · asked by akarimiko 2 in Mathematics