Science & Mathematics - 12 February 2007

2007-02-12 16:54:13 · 2 answers · asked by Anonymous in Geography

Hal makes tables and chairs. Each chair requires 4 ft. of oak and 3 ft. of pine, while each table requires 8 ft. of oak and 2 ft. of pine. Hal has 52 ft. of oak and 23 ft. of pine. How many chairs and tables can he build?

2007-02-12 16:53:44 · 4 answers · asked by soccerrules 1 in Mathematics

How would I calculate weeks, days, and hours of someone who worked a certain amount of hours per month? A work week is 40 hours and a work day is 8 hours. They give an example of someone who worked 70 hours one month and it ended up to be 1 week, 3 days, and 6 hours. I actually need this for my programming class, so I just need to know what to divide, multiply, or whatever. Thank you.

2007-02-12 16:51:09 · 7 answers · asked by Christi 4 in Mathematics

2007-02-12 16:48:35 · 2 answers · asked by dharmesh-miku 1 in Chemistry

I tried finding pOH as -log(2x10^-8)That was about 7.7
then I tried finding pH=14-7.7.The answer was 6.3...but I don't think this is right as KOH is a base..how can I get the correct answer?

2007-02-12 16:47:49 · 3 answers · asked by mammaluv 2 in Chemistry

Whats | 4n + 6 | = 23?

2007-02-12 16:47:42 · 7 answers · asked by Anonymous in Mathematics

2007-02-12 16:44:05 · 9 answers · asked by ashcatash 5 in Earth Sciences & Geology

On the star charts in the back of the book, the green area that represents the Milky Way Galaxy hides the circular representations of the stars. The designations (Greek letters) are still visible, but the stars are missing. Are all copies of this edition defective, or just mine?

2007-02-12 16:43:31 · 1 answers · asked by Anonymous in Astronomy & Space

the cartesian product X x Y is given in each of the following part. find X and Y.

a. {(b,c),(c,c)}
b. {(2,1)(2,2),(2,3),(5,1),(5,2),(5,3)}

please help and explain if possible

2007-02-12 16:41:05 · 5 answers · asked by Anonymous in Mathematics

A satellite, placed into the Earth's orbit to investigate the ionosphere, had the following orbit parameters: perigee, 461 km; apogee, 2317 km (both distances above the Earth's surface); period, 112.7 min. Find the ratio vp/va of the speed at perigee to that at apogee.

2007-02-12 16:37:59 · 3 answers · asked by Victoroza 1 in Physics

ppl said we were going to all die in 1/1/2000 ppl said we were going to die 6/6/06... your going to feel so mental when you dont die the day you said were all going to die! and if we do die we all wont be sad bc we wont have anything to cry about bc we will be dead to. and if our dogs some how are still alive, they wont care!!! no one cares!!

2007-02-12 16:34:46 · 11 answers · asked by snoopy 2 in Zoology

PLEASE HELP ME AND PLEASE GIVE ME THE RIGHT INFO!

2007-02-12 16:34:22 · 1 answers · asked by Kaybee 2 in Earth Sciences & Geology

2007-02-12 16:33:16 · 13 answers · asked by Anonymous in Astronomy & Space

Show that no 3x3 matrix A exists such that A^2 + I = 0
Find a 2x2 matrix A with this property. Please explain how to go about this?

2007-02-12 16:32:52 · 4 answers · asked by Red Ruby 1 in Mathematics

1) 7 5/7% of 17.7-21/9+2.3
2) Divide product of first 5 positve compostie integers by product of next 5 composite integers. Express as fraction.
3) You and I started a 120mile bike race at the same time. You cycled 23.9 mph while I cycled 24mph. When I crossed the finish line, how many miles were you from the finish line? Express as decimal to nearest tenth.
4)The average American consumes 1483 lbs of candy in a lifetime. Assuming 1 year= 52 weeks and the average life span is 75, how many lbs of candy per week does the average American consume? Express as decimal to nearest hundredth.
5) One tablet of calcium contains 25% of the recommended daily dose for an adult. A bottle of calcium tablets contains 500 tablets. Mrs. Marsh gets 25% of her calcium from her diet and the rest from the tablets. If Mrs Marsh gets exactly 100% of recommended daily dose of cacium each day, how many full weeks will one bottle last?

2007-02-12 16:30:55 · 1 answers · asked by cfishot 2 in Mathematics

2007-02-12 16:29:25 · 13 answers · asked by snoopy 2 in Zoology

What is the weather suppose to be like in pacifica on february 18 2007, if it is going to rain please let me know what time it is going to stop

2007-02-12 16:29:19 · 5 answers · asked by Anonymous in Weather

It said to calculate the compound interest earned.
here is the problem
Principal @ $3,000.00 / Rate of Interest is 7 percent / time is 1 year / compounded quarterly Now what would be the interest______________

2007-02-12 16:28:47 · 3 answers · asked by lizajane 1 in Mathematics

If A and B are nxn matrices, AB = -BA, and n is odd, show that either A or B has no inverse

2007-02-12 16:26:36 · 1 answers · asked by Red Ruby 1 in Mathematics

2007-02-12 16:25:22 · 5 answers · asked by medj1234 1 in Earth Sciences & Geology

2007-02-12 16:23:40 · 2 answers · asked by wakparjocsi 1 in Chemistry

2007-02-12 16:21:34 · 2 answers · asked by .......... 4 in Medicine

2007-02-12 16:21:15 · 16 answers · asked by ? Zoo York ? 3 in Physics

In column B I have students' grades (A, B, C, D, or F). In column C I have the number of referrals a student recieved, whether it be 0, 1, or 10. I would like to know how to calculate the correlation between a student receiving an "F", and receiving 1 referral, and then again for more than 1 referral.

2007-02-12 16:16:08 · 2 answers · asked by sensistud 1 in Medicine

2007-02-12 16:13:53 · 1 answers · asked by Monica S 2 in Mathematics

real or virtual

2007-02-12 16:10:55 · 5 answers · asked by stumped on physics 2 in Physics

45). Adult tickets for a play cost $4 and child tickets cost $1. If there were 23 people at a performance and the theater collected $80 from ticket sales, how many children attended the play?
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27), Tickets for an event cost $4 for children, $12 for adults, and $7 for senior citizens. The total ticket sales were $1920. There were 50 more adult tickets sold than child tickets, and the number of senior citizens tickets were 4 times the number of child tickets. How many of each ticket were sold?
thanks

2007-02-12 16:08:41 · 4 answers · asked by dee free 2 in Mathematics

2007-02-12 16:08:31 · 4 answers · asked by Anonymous in Chemistry

2007-02-12 16:07:38 · 3 answers · asked by doctorhockey18 3 in Biology

1.looking at the map of africa, what can we say about th elevation of sub sahara africa? how does this affect the coastal region?

2. consider for a moment how it might be to govern th philippines. what kinds of difficulties may you encounter?(look at thier current situation

3.looking at the ocean floor profile drawn along the equater,what can we safely deduct about the land area as compared to the ocean expanse?

4. what does location tell us about a place?descibe two ways we veiw location geographically.
A.
B.

5.what characteristics of a place do we consider?describe each
A.
B.

6.why is the study of geography so important today?

7.why is human-invirment such an important part of geography

8.what regional characteristics can we determine from a photograph of western sonoma?

9.the earth is a dynamic place. explain this state ment.

10. who was alfred wegener, and what was his important contribution to our understanding of the earths past history

2007-02-12 16:06:33 · 4 answers · asked by Anonymous in Geography