Science & Mathematics - 19 January 2007

find the indefinite integral

the integral of (x+1)e^(x^2+2x)

2007-01-19 08:50:59 · 4 answers · asked by Anonymous in Mathematics

Call me an idiot if you like.

2007-01-19 08:50:57 · 7 answers · asked by chelseasmile. 2 in Botany

2007-01-19 08:49:52 · 11 answers · asked by I keep them J's on my feet!! 2 in Weather

The question says Diborane(b2H6) is widley used in the synthesis of organic compounds. Diborane itself is made by the reaction 2NaBH4+I2=B2H2+2NaI+h2. If 6.3g of NaBH4 are reacted with excess I2, how many grams of diborane could theoretically be isolated? If 1.9 g of diborane is actually produced, what is the percent yield of the reaction?
Does anyone know hw to figure this out?

2007-01-19 08:49:32 · 4 answers · asked by Tubbs 1 in Chemistry

2007-01-19 08:49:26 · 2 answers · asked by Calvin N 1 in Mathematics

Determine whether the pair of fractions is proportional: 5/8 ? 75/120

2007-01-19 08:46:38 · 16 answers · asked by Pushpendra C 1 in Mathematics

2007-01-19 08:46:17 · 2 answers · asked by arkitet 1 in Engineering

3^n +3^n +3^n
hint:note that the answer is not 3^3n since the symbol is not multiplication but addition

without using a calculator,evaluate
(10+20+30+............+100) / (20+40+60+.............+400)

2007-01-19 08:44:45 · 23 answers · asked by demorise 1 in Mathematics

50 or 51?

2007-01-19 08:43:37 · 20 answers · asked by Colton M 1 in Geography

put these in simplest form.

Question 1. 5x - 3/x

a. 5x-3/x
b. 5x^2 - 3/x
c. 4x/3
d. 2/x

Question 2. x/x+1 - x+1/ x + 2

Question 3. (2x + 3/x) (x-2/x)

Question 4. (9-1/x^2) divided by (3x-1)

2007-01-19 08:42:39 · 7 answers · asked by Anonymous in Mathematics

2007-01-19 08:42:35 · 12 answers · asked by damigurl05 1 in Physics

2007-01-19 08:40:38 · 12 answers · asked by chett376 1 in Astronomy & Space

What is the name of the process by which humans increase the frequency of particular trait in a population?

2007-01-19 08:39:30 · 6 answers · asked by JoAnna 2 in Biology

2007-01-19 08:38:19 · 18 answers · asked by stuart r 2 in Other - Science

It's a big blue eye.
Look up the " Hubble Telescope ", it took the picture.

2007-01-19 08:36:57 · 4 answers · asked by elliebear 7 in Astronomy & Space

simplify: 2+3(4+5)3 ... 3 is a power.

Like ive tryed soo many ways but i just cant get it.

And I need help on

-5x+17+7x+17=-4

A -19
B 15
C 19
D -15

2007-01-19 08:36:50 · 8 answers · asked by Anonymous in Mathematics

2007-01-19 08:36:20 · 5 answers · asked by Reza F 1 in Astronomy & Space

I need help with this problem. I got the 1st 3 but I'm stuck on the last one. Suppose that f'(x) is continuous on the closed interval [6,9], that f(x) does not equal 0 on this interval, f(6)=3, f(9)=8, and integral 6 to 9 f(x) dx=3

Using this information find the values of the following definite integrals.
1. integral 6 to 9 f'(x)/(f(x)^2) dx

this is one of the other ones
I got.
integral 1/9 to 1/6 f(1/x)/(x^2) dx and that equaled 3.

2007-01-19 08:36:20 · 2 answers · asked by Anonymous in Mathematics

i mean there are so many 'unexplainable mistakes'... (Watch the movie "What really happened on he Moon" (2CDs)-available free on torrents- to get knowledge about these mistakes)

2007-01-19 08:35:25 · 10 answers · asked by Anonymous in Astronomy & Space

ATG GCG TAT GAC CTA



1. How is this segment of DNA transcribed into messenger RNA (mRNA)?


2. what is the nucleotide sequence of the mRNA that corresponds to this gene segment?

2007-01-19 08:35:21 · 5 answers · asked by jessica_stay 1 in Biology

godel proved that mathematics is self-contradictory thus he explins all the paradoxs in mathemats ie peterburgh paradox in probablity russsels cantor set theory paradox skolem pardox in axiomativ theory Maths is riddled with self-contradiction and godels showed why with his proof of the inconsuistemcy of math

the mathematician Bunch and the mathmaticians Nagel and Newman state " what godel proved was the lair paradox it is a statements x that says x is not provable Therefore if x is provable it is not provable a contradiction If on the other hand x is not provable the its situation is more complicated. If x says it is not provable and it really is not provable then x is true but not provable. RATHER THAN ACCEPT A SELF-CONTRADICTORY STATEMENT MATHEMATICIANS SETTLE FOR THE SECOND CHOICE"

Dean shows that this leads to the meaninglessness of mathematics at a fundamental level What do you think

http://gamahucherpress.yellowgum.com/gamahucher_press_catalogue.htm

2007-01-19 08:32:09 · 6 answers · asked by Anonymous in Mathematics

2007-01-19 08:31:38 · 25 answers · asked by Patti 1 in Engineering

I hate these problems I cant seem to get them.

Given U = {All letters of the alphabet} A = {b, c, d} and B = {c, e, f, g} List the elements of set

(c) A′ ∩ B′ -

(d) A′ U B′ (e) A U B′
(f) (A U B′ ) ∩ B (g) (A U B) ∩ (A U B′)

2007-01-19 08:30:06 · 3 answers · asked by Anonymous in Mathematics

visited by UFOs? Travel between the stars in any reasonable time is extremely difficult due to the enormous distances involved. Our closest star (after the sun) is Proxima Centauri at over 4 light years away. The Voyager 1 space probe will take over 74,000 years at an average speed of 61,200 kmph (38,000 mph) to reach this distance. So why is this more believable than the moon landings or Mars landings?

2007-01-19 08:30:00 · 5 answers · asked by Anonymous in Astronomy & Space

2007-01-19 08:29:56 · 8 answers · asked by bedo 1 in Geography

help please

2007-01-19 08:29:25 · 14 answers · asked by mia 1 in Mathematics

2007-01-19 08:28:46 · 1 answers · asked by don v 1 in Mathematics

2007-01-19 08:28:38 · 3 answers · asked by goring 6 in Astronomy & Space

I have to make a circle graph in math, and the teacher said we can pick our own data. But I have no idea what I want to do. What are some good suggestions, of data?

2007-01-19 08:26:37 · 3 answers · asked by Kedah<3 3 in Mathematics

2007-01-19 08:26:18 · 5 answers · asked by goring 6 in Astronomy & Space