Science & Mathematics - 6 December 2007

2007-12-06 13:40:07 · 4 answers · asked by timmee91 1 in Physics

One serving of Muesli breakfast cereal contains 4 grams of protein and 30 grams of
carbohydrates. One serving of Multi Bran Chex contains 2 grams of protein and 25 grams
of carbohydrates. A dietitian wants to mix these two cereals to make a batch that contains
at least 44 grams of protein and at least 450 grams of carbohydrates. If the cost of Muesli
is 21 cents per serving and the cost of Multi Bran Chex is 14 cents per serving, then how
many servings of each cereal would minimize the cost and satisfy the constraints? (Hints:
Formulate the problem as a linear programming problem and draw a graph to represent this problem and find
the minimum cost)

2007-12-06 13:39:38 · 2 answers · asked by ? 1 in Mathematics

Thanks!

2007-12-06 13:39:11 · 7 answers · asked by Uzma S 2 in Earth Sciences & Geology

i feel so dumb when i ask these questions all the time, but here it goes:

Rectangle ABCD has vertices at A(4,7), B(3,1), and C(-3,2).
i have the equations for AB and BC, but i have to find one for CD and AD as well, and I'm not sure how to find the vertice for D if i even have to. I have to find the equation of the line that contains CD and find the equation of the line that contains AD.

2007-12-06 13:35:57 · 1 answers · asked by k4y14hhh 2 in Mathematics

Intitial value 10
Limit to growth 40
Passing through 1,20

Initial value 12
limit to growth 60
passing through 1,24

any help would be great
Im stumpped

2007-12-06 13:35:30 · 2 answers · asked by Anonymous in Mathematics

2007-12-06 13:22:35 · 1 answers · asked by Anonymous in Mathematics

When the temperature is colder (or when it decreases), is the air less dense or more dense?

2007-12-06 13:22:17 · 7 answers · asked by flandreaa 1 in Weather

Ac ompany establishes a sinking fund for upgrading office equipment with quarterly payments of $7500 into an account paying 6.8% compounded quarterly. How long will it be before the account has $150,000? (Round up to the next-higher quarter if not exact.)

2007-12-06 13:21:32 · 1 answers · asked by shadowcat_97008 1 in Mathematics

2007-12-06 13:20:23 · 2 answers · asked by ngoc h 2 in Mathematics

Im writing a research paper... and some of my sources say hectors and some say hectares...? is this just a typo? which is correct? and if you could, how many hectors/hectares are there in an acre? thank you!

2007-12-06 13:17:08 · 9 answers · asked by Wy36 2 in Geography

OK, so I'm having a huge brain fart. Would anyone happen to know what the anti-derivative of 1/sqrt(x) dx?

2007-12-06 13:15:25 · 2 answers · asked by Anonymous in Mathematics

For sulfur, the fluorides SF2, SF4, and AF6 are known to exist, whereas for oxygen only OF2 is known to exist. Why?

2007-12-06 13:12:57 · 1 answers · asked by ny_spinner_dan 3 in Chemistry

Is it a different molecular arrangement? Does that mean you can convert Ethanol to Ethyl Alcohol?

2007-12-06 13:10:27 · 10 answers · asked by Anonymous in Chemistry

please need help on this!

2007-12-06 13:08:40 · 3 answers · asked by Markoso 1 in Chemistry

Molarity!??!?!? help is greatly appeciated!!!!! thanks

2007-12-06 13:06:08 · 1 answers · asked by Anonymous in Chemistry

There is a kindergarten building next to my school. Nuns used to live in the upstairs of the building. The teachers believe there is a ghost in there because when they are alone in the building they hear foot steps. Today me and my friend when to the bathroom upstairs in the building.(which quite creepy) We were the only in there. When I was washing my hands (my friend was right next to me but facing toward the stalls) when I here a door opening and closing. My friend told me to turn around because the stall door was opening a closing by itself. I turned around and then it stopped. Me and my friend think there is a ghost nun living in the building. Next time we go there we want to try to make contact with the ghost to prove there is really a ghost. How do we make contact with the ghost?

2007-12-06 13:05:33 · 21 answers · asked by Anonymous in Paranormal Phenomena

Two point charges are separated by 6 cm. The attractive force between them is 30 N. Find the force between them when they are separated by 24 cm.

2007-12-06 13:02:46 · 1 answers · asked by maggiegd05 1 in Physics

2007-12-06 13:01:02 · 1 answers · asked by maggiegd05 1 in Physics

2007-12-06 12:59:48 · 2 answers · asked by menicholson1 1 in Chemistry

please tell me because its serious

2007-12-06 12:58:33 · 7 answers · asked by Showtime! 2 in Astronomy & Space

2007-12-06 12:50:26 · 2 answers · asked by angelsnairwaves3 2 in Mathematics

A common misconception is that molecules of solids are harder than molecules of liquids. Explain why this is false.
Please help me..

2007-12-06 12:50:14 · 1 answers · asked by Anonymous in Chemistry

How can a point of origin in a fire be found?

2007-12-06 12:49:40 · 5 answers · asked by toontownfanatic 2 in Other - Science

1/4(5^k - 1) + 5^k = 1/4(5^(k+1) - 1)

If you're having a hard time with the exponents and all that, I typed it in Word and uploaded a picture of it

http://i134.photobucket.com/albums/q103/thepresident022/equation.jpg

So at any rate, can anyone figure this out? My dad and I tried for like half an hour and finally gave up! We got it a few steps down and plugged in some sample numbers and proved that it worked, but we just couldn't get it to where one side was exactly the same equation as the other.

Anyone wanna' give it a shot?

2007-12-06 12:48:58 · 13 answers · asked by Burnt Toast 1 in Mathematics

1) given A(-4,3) and B (-6, -1) , find the distance, midpoint and slope.

how do i find the MIDPOINT???

2007-12-06 12:47:21 · 3 answers · asked by Anonymous in Mathematics

please answer i need help

2007-12-06 12:47:00 · 1 answers · asked by minnie 1 in Mathematics

it tells you b, c, and d are nonzero numbers. and you have to provide a reason for each of your conclusions for the parts below.
a. it contains the origin.
b. it intersects the y-axis in one and only one point
c. it intersects the x-axis in at most three points
d. it intersects the x=axis at least once
e. for x very large, it behaves like the graph of f(x) = x^3
f. it is symmetric with respect to the origin

2007-12-06 12:45:39 · 4 answers · asked by Anonymous in Mathematics

Hey! I've been trying to work on this vectors worksheet lately. Here it is:

1. http://img205.imageshack.us/img205/9427/70466397yk4.jpg
2. http://img490.imageshack.us/img490/2572/58282826kh9.jpg
3. http://img490.imageshack.us/img490/8449/72000225yt9.jpg

I got many answers, but I was unable to do (or was not sure about) the ones with stars next to them (#4, 7, 10, 12, 14, and 20). I'd really appreciate if someone explained them to me. Also, if someone has the time, and heart to look over my other answers and tell me if I'm correct or not, I'd be more than grateful.

Thanks for any help! :]

2007-12-06 12:45:07 · 1 answers · asked by Anonymous in Physics

plz. explain how to do it.


A ramp could be used to raise the concrete 20 m.
a) How much work would be required if the ramp formed at an angle 30 degrees with the horizontal?
b) How long would the ramp be?
c) How much force would be required?
(The component of the force // to the ramp.)
(Neglect friction)

2007-12-06 12:43:58 · 1 answers · asked by garyeestra2 1 in Mathematics

I came to a conclusion that there is no way.

2007-12-06 12:43:30 · 8 answers · asked by Anonymous in Astronomy & Space