Science & Mathematics - 19 September 2007

again i need help isolating x. i tried the exponent laws but i got stuck after this line

log x^3 = log 1728 - log64

2007-09-19 13:52:45 · 1 answers · asked by C.L. ~Raptors~ 4 in Mathematics

It takes a couple four hours to row 28 miles with the river current. If it takes them 7 hours to cover the same distance when rowing against the current, find the speed of the river current.

2007-09-19 13:52:35 · 5 answers · asked by Anonymous in Mathematics

2007-09-19 13:52:16 · 4 answers · asked by Anonymous in Medicine

I have a test tomm. I need to know the locations of some of the countries in the continents Asia, Europe, Latin America and Africa. Do you know where i could find a good map? and also any tips or tricks on memorizing where the countries are located and which continents they are in. Thanks!!

2007-09-19 13:51:52 · 4 answers · asked by Anonymous in Geography

I need help with the following questions. I am terrible at math and I want to check my answers. I NEED a good grade on this test!!
1) If you subtract 13 times a number from 3 times its square, the result is 10. Translate into an equations and solve.

2)A photograph is 7in long & 5in wide. It is surrounded by a border of uniform width. If the area of the border is 64 sq in, what is the width of the border?

3) Factor this completely: a*2 + 14ab + 45b*2
(the * means the next number is the exponent)

4) Facotr completely: x*3 + 64

Factor completely: 5x*4 + 18x*2 + 9

THANK YOU FOR ANY AND ALL HELP!!

2007-09-19 13:50:27 · 2 answers · asked by Nikki M 2 in Mathematics

can you tell me a really good description of land and water features. like what it is. if you can a dictionary description please!

2007-09-19 13:49:52 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-19 13:47:58 · 4 answers · asked by tripathi_jagdish 1 in Earth Sciences & Geology

A blue light flashes every 2 minutes.
A white light flashes every 3 minutes.
At 8 pm they flash together

a) At what time will this happen again?
b) The lights are adjusted at 9:30 pm. at which they flashed together. Now the blue light flashes every 6 minutes and the white light flashes every 10 minutes. At what time will they next flash together?

2007-09-19 13:46:21 · 2 answers · asked by NinjaX 2 in Mathematics

2007-09-19 13:46:10 · 4 answers · asked by Anonymous in Weather

help me solve this..it says "use elimination"

2007-09-19 13:44:16 · 10 answers · asked by Anonymous in Mathematics

If you are standing at a street corner, can anyone explain the reason that the sound of a car coming toward you sounds different than after it passes you? The same is true for police sirens and motorcycles etc., but why is this?

2007-09-19 13:43:27 · 4 answers · asked by Boomer 5 in Physics

2007-09-19 13:42:26 · 12 answers · asked by Gavin J 2 in Mathematics

Please help me because this is the science fair project question please???????

2007-09-19 13:38:55 · 5 answers · asked by Anonymous in Zoology

ppleazzzz


A dime is about 1mm thick.How many dimes are in a stack of 1 cm high?




Flying at an avreage speed of 525 miles per hour, how far can a passenger fly in 2,3,and 4 hours?



A whole pizza was cut into eights.If hector eats3/8 of this pizza and rita eats 1/4 of the pizza,then what fraction of the pizza remains?


the ceiling fan company sold 7400 fans this year and 6900 fans lastyar.How many more fans did they sell this year compared to last yea?


write the prime factorization between of 120


list all prime numbers between 70 and 90

2007-09-19 13:37:49 · 3 answers · asked by Anonymous in Mathematics

2007-09-19 13:35:45 · 11 answers · asked by RonW 1 in Astronomy & Space

basically im doing a research project and need diff views on ID..
Thank muchs :)

2007-09-19 13:35:33 · 5 answers · asked by Kayla 3 in Other - Science

2007-09-19 13:32:38 · 8 answers · asked by Anonymous in Weather

Solve the equation to find the unknown value

Rudy bought a can of three tennis balls and a new grip for his racquet. The grip cost $7.49. The total of the items was $9.38 i n all. How much did each tennis ball cost?

Ya I know it's $0.63 each but I need to know what the equation is o_O...help? my heads too lazy

2007-09-19 13:31:35 · 8 answers · asked by bilbobagginz 3 in Mathematics

Here in Detroit, during the summertime, I've notice Thunderheads that billow up and have the heaviest rain/hail core ever with the biggest Pileus/Cumulonimbus cloud. However, it doesn't produce lightning. Why is that?

2007-09-19 13:30:54 · 5 answers · asked by Anonymous 5 in Weather

I'm in Honors Pre-Calculus and we're going over some things we learned in Algebra 2. I'm having a lot of trouble gripping it (just like I did in Algebra 2). I'm going over recursive formula and "U sub 1" is how it's described in the book. I have an example from a previous quiz that I bombed.. could someone explain how recursive formula works and go step by step through this problem with me?

Problem #6:
Dante deposited $10,000 into an account with an annual interest rate of 3.75%, compounded quarterly. He plans to deposit $750 each quarter just after the interest is compounded.

a. Write a recursive formula for Dante.

b. What will his balance be after 5 years?

I have no idea how to write a recursive formula or figure it out.. I'm completely lost and swamped with over-due homework because I couldn't do it.

Any help will be greatly appreciated..
Thank you in advance. :]

2007-09-19 13:29:21 · 4 answers · asked by Anonymous in Mathematics

log x = log 3 + 2 log x

The answer is x =1/3 but i don't know how to get it. Can anyone help?

2007-09-19 13:27:53 · 8 answers · asked by C.L. ~Raptors~ 4 in Mathematics

I've always wondered why some electrical wires that hang and pass above water such as rivers have huge color balls. I always thought that if the wires happen to fall into the river, that they would be easy to locate because they would float. But this theory was put down when I saw electrical wires with color balls above ground and not near water.

Does anyone really know why electrical wires have these colorful balls?

2007-09-19 13:25:55 · 4 answers · asked by Anonymous in Engineering

please...

2007-09-19 13:25:38 · 3 answers · asked by Anonymous in Mathematics

Ever since the first day back at school my bf asks me what is the answer to 0 divided by 0. Anybody got an answer for it?

2007-09-19 13:24:47 · 30 answers · asked by Steffy 1 in Mathematics

These are hyperbolas
a. xy greater than or equal to 8
b. xy greater than or equal to 1
c. xy greater than or equal to 0

b. xy less than or equal to -1

2007-09-19 13:23:49 · 2 answers · asked by Zoology 1 in Mathematics

The sum of two numbers is 82. Their difference is 24. Write a system of equations that describes this situation. Solve by elimination to find the two numbers.


Anyone know???

2007-09-19 13:22:56 · 10 answers · asked by Anonymous in Mathematics

The highest score you can get is 130....I got 118. what does that mean? Am I smart? Or not? It labeled me as a Visual Mathematician....does this mean I'm smart or not? On a percentage scale in the Visual Spatial section I scored 100% out of 100%....does this mean I'm smart or not?

2007-09-19 13:20:33 · 6 answers · asked by Tutti F 1 in Other - Science

We're installing an inground fibreglass swimming pool and the council is worried about pressure on the pipes underground. We aren't excavating as deep as the pipes so won't be disturbing them. Would the weight/pressure of a full pool actually be more or less than the existing soil?

2007-09-19 13:17:09 · 2 answers · asked by Anonymous in Earth Sciences & Geology

well my daughter has a science project and she has to list some abiotic examples and biotict can someone help me??!!

2007-09-19 13:16:55 · 3 answers · asked by MelissaC 2 in Biology

You are presented with three white solids, A, B and C, which are glucose (a sugar substance), NaOH,
and AgBr. Solid A dissolves in water to form a conducting solution. B is not soluble in water. C dissolves in water to form a nonconducting solution. Identify A, B, and C.

2007-09-19 13:11:53 · 2 answers · asked by joey 1 in Chemistry