Science & Mathematics - 19 November 2007

2007-11-19 13:15:55 · 1 answers · asked by Anonymous in Mathematics

The school cafeteria sold 300 hamburgers on Wednesday. The hamburgers are made with cheese, lettuce, and bacon. 45 of the hamburgers had cheese, lettuce, and bacon. 65 had bacon and lettuce. 80 hamburgers had cheese and lettuce and 100 had bacon and cheese. 60 hamburgers had just bacon and 85 hamburgers did not have cheese. How many hamburgers had just cheese on them?

2007-11-19 13:13:09 · 26 answers · asked by misha61615 2 in Mathematics

could the person have discovered a new element?

this question was on my chemistry study guide/review, and it seems like there is just not enough info. trick question?

and no, this isn't for homework, it's a question on a review packet for our next test.

2007-11-19 13:04:24 · 2 answers · asked by Kasey13 1 in Chemistry

Mark drove 150 mi to visit Sandra. Returning by a shorten route, he found that the trip was only 130 mi, but traffic slowed his speed by 6 miles. If the two trips took exactly the same time, what was his rate on the return trip?
Avail answers are: 40,39,36,25 Thanks!!

2007-11-19 13:03:20 · 4 answers · asked by mathidiot 1 in Mathematics

2007-11-19 13:01:15 · 5 answers · asked by Anonymous in Biology

2007-11-19 13:01:03 · 6 answers · asked by Anonymous in Mathematics

Which of the following statements are true?

For statements a) through d) use the reaction:
Cu(s) + 2Ag+(aq) --> 2Ag(s) + Cu2+(aq)
a) Cu is the reducing agent
b) Ag+ is the reducing agent
c) Cu is oxidized
d) Ag+ is oxidized
e) Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) is a redox reaction
f) Al(OH)4-(aq) --> AlO2-(aq) + 2H2O(l) is a redox reaction

you must enter all true statements in one lower case group,
in alphabetical order
e.g., if a) b) and e) are true you would enter abe

2007-11-19 13:00:27 · 3 answers · asked by physicsisgay 2 in Chemistry

I see many people here discussing evolution v. creation. Many of the people discussing it don't really seem to be scientists or have much science background (that's only an impression though).

It got me wondering if your average person can really understand the science of evolution. Anatomy, genetics, chaos theory- they are all fairly complex.

Any thoughts?

2007-11-19 12:58:35 · 11 answers · asked by Anonymous in Biology

All I've got says it does, but acetate's protic so wtf........or maybe if you count it as the wb then I guess it makes sense.... ??? IDK I was going for SN1 or E1..

2007-11-19 12:57:31 · 2 answers · asked by bad_banking 3 in Chemistry

2007-11-19 12:57:24 · 1 answers · asked by Miss Crystal Marie 1 in Weather

Explain why Tony's mistake was. Then find the correct answer.

2007-11-19 12:57:08 · 4 answers · asked by sades0308 2 in Mathematics

Use exponents to write the prime factorization of this number.

2007-11-19 12:55:41 · 4 answers · asked by sades0308 2 in Mathematics

2007-11-19 12:54:50 · 1 answers · asked by Eric D 1 in Physics

2007-11-19 12:53:37 · 3 answers · asked by sades0308 2 in Mathematics

thnx for ur help

2007-11-19 12:47:52 · 1 answers · asked by lachar1991 1 in Physics

Im just wondering why fungus tends to grow more-so on stumps than on living trees?

2007-11-19 12:46:50 · 3 answers · asked by hipnotikgurl 1 in Biology

2007-11-19 12:46:50 · 2 answers · asked by Anonymous in Chemistry

In the future, perhaps in this century, we will see the rise of a lunar colony!
How will this government work? Will the moon have territories claimed by the countries that have landed there? Or will it be an independent nation?

2007-11-19 12:46:44 · 8 answers · asked by Anonymous in Astronomy & Space

2007-11-19 12:45:54 · 1 answers · asked by gaspar e 1 in Engineering

Hello. Could you please help me with these? We started a lesson today and I was not in class so I have no idea what I'm doing and these are due tomorrow. Could you please show all work and all of that jazz?
Thank you so much!

1) Write word and formula equations for the reaction in which aqueous solutions of sulfuric acid and sodium hydroxide react to form aqueous sodium sulfate and water.

2) Translate the following chemical equations into sentences:

a) 2K(s) + 2H²O (l) ----> 2KOH (aq) + H² (g)

b) 2Fe (s) + 3Cl² (g) -------> 2FeCl³ (s)



3) Write the word, formula, and chemical equations for the reaction between hydrogen sulfide gas and oxygen gas that produces sulfur dioxide gas and water vapor.


4) The reaction of vanadium (II) oxide with iron (III) oxide results in the formation of vanadium (V) oxide and iron (II) oxide. Write the balanced chemical equation.


Thats it, please help me! Anything you can do helps me out bunches! Thank you!!

2007-11-19 12:45:04 · 1 answers · asked by :) 4 in Chemistry

2007-11-19 12:44:49 · 4 answers · asked by Lisa S 1 in Mathematics

whats the formula for an area of a triangle. the formula must be for a triangle thats not right nor isocellies.... its for a trig question so it might include a sinx in the formula.

2007-11-19 12:41:40 · 9 answers · asked by john doe 2 in Mathematics

A 215-N box is placed on an inclined plane that makes a 35.0 degree angle with the horizontal.

2007-11-19 12:40:41 · 2 answers · asked by georgie0515 1 in Physics

2007-11-19 12:40:17 · 7 answers · asked by Jerome C 1 in Geography

1. AlF3
2. FeCl2
3.Co(NO3)2
4. MgSO4
5. NH4Cl
6. CrPO4
7. Ba(OH)2
8. Na2CO3
9. BaF2
10. Cu(NO3)2
11. NiSO4
12. Zn3(PO4)2
13. NA3N
14.CuCO3
15. (NH4)2SO4

PLEASE HELP..AND THANK U!!

2007-11-19 12:38:28 · 3 answers · asked by Anonymous in Chemistry

The sum of my ones digit and tens digit is also 10. However, my ones digit is greater than my tens digit. I am a prime number less than 30. What number am I?

2007-11-19 12:37:16 · 3 answers · asked by sades0308 2 in Mathematics

2007-11-19 12:34:04 · 5 answers · asked by Anonymous in Chemistry

I live in the United States. Our BIG storms in the Southeast area are called Hurricanes. But the BIG storm that just happened in Bangladesh is called a Cyclone. When you see it from a space satellite it looks exactly like a Hurricane. Why do they call the same type of storm, different names.?? Thank you.

2007-11-19 12:33:33 · 4 answers · asked by kingsley 6 in Weather

So I'm having a test on formula writing tomorrow, and I need to memorize a bunch of polyatomic ion charges. However, I recall my teacher saying that there is a somewhat easier way to go about doin this. Like depending on what the polyatomic ion ends in (like ite, ate etc) you can determine the charge more easily.
If somebody knows what I'm talking about, and could expand on it I would really appreciate it, and I will give 10pts to the best answer.

2007-11-19 12:33:29 · 3 answers · asked by Person X 2 in Chemistry

the vectors 39.5cm at 15.0 degrees and 23.0cm at 64.0degrees both start from the origin. Both angles are measure counter-clockwise from the x-axis. The vectors form 2 sides of a parallelogram

a) find the area of the parallelogram

b) find the length of its longer diagonal.

2007-11-19 12:33:03 · 1 answers · asked by Anonymous in Mathematics