Science & Mathematics - 6 October 2007

ok i dont get this problem...

Four people staying for three nights at a cabin priced at $36.00 per night for two people, plus $3.50 per additional person

i did it like over 5 times and i keep getting the same answer, but according to my lesson, its wrong...

i keep getting $115 for an answer
but it says that its $129..

am i missing something ?

2007-10-06 15:56:25 · 6 answers · asked by Anonymous in Mathematics

Find the exact value of sin^-1 = (- sqrt 3/2)

2007-10-06 15:52:01 · 3 answers · asked by sillyboys_trucksare4girls 2 in Mathematics

The diagram to the right shows the region enclosed by the curve y = x^2, the lines x =1 and x = 5 and the x axis.

Find the approximation for this area using mid ordinate with:
1 strip
2 strips
and 4 strips.

Now i've done that, and with each of the strips I came up with the same answer 12.5 So that part is down, but it's the next part I'm a little confused about.

~Which do you think is the best approximation?
Why?

Would it be the first one because it requires less calculations for the same answer or the last one because it is more specific?
Or are the all the same?

2007-10-06 15:51:08 · 1 answers · asked by Skaggy says: 5 in Engineering

once again sorry and help

2007-10-06 15:44:51 · 12 answers · asked by samir s 1 in Medicine

2007-10-06 15:41:24 · 6 answers · asked by Anonymous in Mathematics

Go to this page to see the diagram.

http://i21.tinypic.com/2cqyzab.gif

Thanks!

2007-10-06 15:34:40 · 3 answers · asked by sillyboys_trucksare4girls 2 in Mathematics

1. Two numbers are reciprocals if their product is equal to 1. If x and y are reciprocals and x is greater than 1, then y must be....
a. less than -1
b. between 0 and -1
c. equal to 0
d. between 0 and 1
e. greater than 1

2. A number line that includes every number
-infinity to -1(included) then begins again at 3(included) to infitity is represented by...
a. -1 is less than or equal to x AND 3 is
less than or equal to x
b. -1 is less tahn or equal to x AND 3 is
greater than or equal to x
c. -1 is less than or equal to x OR 3 is less
than or equal to x
d. -1 is greater than or equal to x OR 3 is
less than or equal to x
e. -1 is greater than or equal to x OR 3 is
greater than or equal to x

2007-10-06 15:33:01 · 1 answers · asked by Anonymous in Physics

x-7/5+7/5=-x/7

And can you please show me how you solved it.

2007-10-06 15:30:41 · 4 answers · asked by Wonderer 1 in Mathematics

helpp.. answer and problem work.

2007-10-06 15:25:26 · 2 answers · asked by lil bit 1 in Mathematics

Express your anwser in calories.

2007-10-06 15:22:04 · 4 answers · asked by Jamie P 1 in Chemistry

factor

1. 9x^2- 12x-5
2. 7x^2- 27x=26

2007-10-06 15:20:59 · 5 answers · asked by COCO CHANEL 2 in Mathematics

please help, thanks

2007-10-06 15:20:50 · 3 answers · asked by josefina 1 in Mathematics

2007-10-06 15:20:47 · 11 answers · asked by Tammy t 1 in Geography

If you are using a film densitometer with a step size of 7um, what is the minium magnification that you could use so that 20 Å information is transferred within the Shannon-Nyquist information limit of the digitized micrograph? What magnification would you use if you want your sampling to be 3 x the critical sampling frequency?

I know that the Nyquist limit is : the sampling frequency must be greater than TWICE the highest frequency of the input signal in order to be able to reconstruct the original perfectly from the sampled version.

so I think I need to do some on the 20Å information, maybe times 2 or divided it by 2. Can anyone help me?

2007-10-06 15:16:51 · 1 answers · asked by shinjicamui 1 in Engineering

This stuff works better for me than modafinil...

2007-10-06 15:04:43 · 2 answers · asked by Anonymous in Medicine

If Aliens really are paying regular visits to the Earth, what species do you think they're most likely to contact or monitor?

2007-10-06 15:02:51 · 24 answers · asked by Anonymous in Paranormal Phenomena

How would I add 1/2x + x? I know 1/2x * x is 1/2x squared, but how would I add them? Explanation appreciated.

2007-10-06 15:02:18 · 16 answers · asked by Karina 1 in Mathematics

Prove that:

[1/(1 - x²)] + [1/(1 - y²)] ≥ 2/(1 - xy)

given that x and y are positive real numbers using only inequalities.

2007-10-06 14:56:38 · 2 answers · asked by Akilesh - Internet Undertaker 7 in Mathematics

tnx for da help^ ^

2007-10-06 14:49:37 · 6 answers · asked by Siela 1 in Mathematics

Why can i not remember how to solve this sort of question. I can get maybe four steps into it and I get lost.

4-6(x+2) is greater than or equal to 5x+25

2007-10-06 14:48:31 · 6 answers · asked by amosunknown 7 in Mathematics

2007-10-06 14:45:58 · 3 answers · asked by Azumi 2 in Biology

...HOW?
In my studio apartment, my hygrometer sometimes shows a 1 or 2 percent drop after turning the fan on. (No open windows.)

(Sorry, a little off topic)

2007-10-06 14:42:37 · 6 answers · asked by Anonymous in Weather

i can't answer this and the question is 10.5 kilograms to grams

2007-10-06 14:41:49 · 11 answers · asked by Anonymous in Mathematics

Using the definition of the scalar product, find the angles between the following pairs of vectors.
(a) A = - 3 i + j k and B = 2 i j - 3k


(b) = 2i - 3 j k and = - 2i - j - k


(c) = - 4i + 5 j k and = 3i + 4j - k

2007-10-06 14:40:45 · 2 answers · asked by surfing86 2 in Physics

2007-10-06 14:38:57 · 7 answers · asked by Anonymous in Astronomy & Space

2007-10-06 14:36:29 · 6 answers · asked by deannahndrsn 2 in Mathematics

WHEN we ask how life on Earth emerged, we find two different answers:


One is that living things emerged by evolution. According to the theory of evolution, which makes this claim, life began with the first cell, which itself emerged by chance or by some hypothetical natural laws of "self-organization." Again as a result of chance and natural laws, this living cell developed and evolved, and by taking on different forms gave rise to the millions of species of life on Earth.

The second answer is "Creation." All living things came into existence by being created by an intelligent Creator. When life and the millions of forms it takes, which could not possibly have come into existence by chance, were first created, they had the same complete, flawless, and superior design that they possess today. The fact that even the simplest-looking forms of life possess such complex structures and systems that could never have come about by chance and natural conditions is a clear proof of thi

2007-10-06 14:36:23 · 5 answers · asked by Anonymous in Biology

Suppose the following lottery is conducted a large number of times. There are n people (you can assume n is fairly large or you could let it be 100 or 1000 if you like) and each writes a positive integer on a piece of paper. The winner is the one who writes the smallest unique positive integer. For example, if 4 people write a 1 and 2 people write a 2 and only one person writes a 3, ther person who wrote a 3 is the winner.

So my question is, if this game is played a large number of times, which is the average of all the winning numbers.

In case you were curious, I have been prefacing some of my recent math questions with "Math Challenge:" in order to (a) signify that this is not my homework and (b) possibly add a bit of excitement =) However, unlike the previous ones, I have no idea what the answer to this is, or if there even is one, but I would be very interested in people's thoughts.

By the way, I once played this game with about 30 people and the number 2 won!

2007-10-06 14:30:59 · 3 answers · asked by Phineas Bogg 6 in Mathematics

What will happen to the cell? What is the reason for the difference between what happens to plant and animal cells placed in pure water?

2007-10-06 14:22:01 · 4 answers · asked by V 1 in Biology

Vyt - gt^2/2 = h - gt^2/2
simplify the expression above and slove for h in terms of Vy and t
t=d/Vy substitute this value for t into your simplified equation.
Vx= v cos(angle) and Vy= sin(angle) subtitute these values for Vx and Vy in your current equation and simplify. divide both sides by d and you should have aand expression equivalent to tan(angle)= h/d
so how does all this work. I want explanations.

2007-10-06 14:17:51 · 2 answers · asked by simpukka 1 in Physics