Science & Mathematics - 26 December 2007

Exponential Equations:

(1) If 2^x = 3, find 4^(-x)

(2) If 5^(-x) = 3, find 5^(3x)

2007-12-26 10:20:16 · 4 answers · asked by journey 1 in Mathematics

Solve each equation for x.

(1) f(x) = (1/2)^(1 - x) = 4

(2) f(x) = 4^x - 2^x = 0

2007-12-26 10:15:27 · 5 answers · asked by journey 1 in Mathematics

2007-12-26 10:11:29 · 5 answers · asked by Anonymous in Zoology

Does it always have to go into the muscle, or can it go into your backside?

2007-12-26 10:10:44 · 0 answers · asked by oneakmusic 2 in Medicine

A. sexual dimorphism.

b. the size of newborn human babies.

c. the number of eggs in a typical robin’s next.

d. All of the above are examples of stabilizing selection.

e. Choices 1 and 3 are examples of stabilizing selection.

2007-12-26 10:05:59 · 7 answers · asked by Anonymous in Biology

its driving me crazy!!! i can only think of 6 of the 7...which one am i forgetting?? I used to know them all.

I
V
X
L
C
M

2007-12-26 10:05:33 · 15 answers · asked by Miss Meg 5 in Mathematics

2007-12-26 09:56:32 · 4 answers · asked by Anonymous in Weather

need real answers please help

2007-12-26 09:50:28 · 7 answers · asked by sophie 1 in Chemistry

can it melt roots in a sewer line? (clean out provides the venting outside).

2007-12-26 09:45:38 · 2 answers · asked by MrZ 6 in Chemistry

If I were to get a doctorate in Aerospace Engineering, would that be enough to become an astronaut? Now, I am not counting all the medical exams and stuff.

If not, what else would you need if you did not want to go into the test pilot, air force, and that type of stuff?

2007-12-26 09:44:46 · 6 answers · asked by wiggly3 1 in Engineering

Is there even a center of the Universe?

2007-12-26 09:41:49 · 10 answers · asked by Nikki 1 in Astronomy & Space

2007-12-26 09:41:23 · 12 answers · asked by Anonymous in Astronomy & Space

My teacher hates us and gives homework over winter break.

Solve for X:

16x^2 - 9 = 0

a) {16/9 , -16/9}
b) {4/3 , -4/3}
c) {3/4 , -3/4}
d) {9/16 , -9/16}
e) {3/4 , 9/16}
f) None of the above.

And please, don't say None of the above unless it's really N/A. Thanks!

2007-12-26 09:31:36 · 16 answers · asked by Wai 5 in Mathematics

will the logical pattern work if the sum is a different number?

2007-12-26 09:30:40 · 0 answers · asked by ayeeeeo 1 in Mathematics

2007-12-26 09:27:14 · 6 answers · asked by Anonymous in Other - Science

Best answer wins a date with my mom and a holiday in Pakistan.

2007-12-26 09:26:08 · 51 answers · asked by Anonymous in Astronomy & Space

2007-12-26 09:24:37 · 5 answers · asked by linc 1 in Mathematics

This problem deals with finding modulus roots.
Is there a general method for solving problems like the one described below.

Solve the following

5^(1/7)mod(47)

ie find a number x, such that x^7 = 5 (mod 47).

2007-12-26 09:20:49 · 6 answers · asked by Christine P 5 in Mathematics

Do you think scientists will discover the end of the boundaries of the universe someday? What else could you imagine is out there besides the universe?

2007-12-26 09:19:24 · 11 answers · asked by Anonymous in Astronomy & Space

some one answered a Q on here a few days ago and from that i learnt that temperature isn't what i thought it was
it is the measurement of hot to cold
or something very similar
could you please without using long big words and complicated phyics exsplain it more please
and how it comes around
p.s i understand some stuff

thanks

Mr IP

2007-12-26 09:17:33 · 9 answers · asked by Mr IP 2 in Physics

Live near F Train

2007-12-26 09:17:00 · 5 answers · asked by Susan B 1 in Geography

what is the difference between the measures of the largest and smallest angles of the triangle? (I keep getting 40 and that is incorrect) Please explain how you got the answer THANKS!

2007-12-26 09:14:35 · 12 answers · asked by staciaschool2 2 in Mathematics

Hope you all had a Merry Christmas yesterday. The challenge du jour:

Let n be an arbitrary fixed positive integer, and consider the right-hand Riemann sums of the function x^n obtained from a partition of [0, 1] into m equal intervals. These are:

[k=1, m]∑(1/m * (k/m)^n)

Using the fundamental theorem of calculus, it is of course trivial to prove that:

[m→∞]lim [k=1, m]∑(1/m * (k/m)^n) = [0, 1]∫x^n dx = x^(n+1)/(n+1) |[0, 1] = 1/(n+1).

Your mission, should you decide to accept it, is to prove the limit [m→∞]lim [k=1, m]∑(1/m * (k/m)^n) = 1/(n+1) _directly_, without using the fundamental theorem. Can you do it?

2007-12-26 09:12:54 · 3 answers · asked by Pascal 7 in Mathematics

2007-12-26 09:12:25 · 28 answers · asked by Billy Shat 7 in Weather

I am thinking about leasing 20 acres of tillable land to grow a crop of field corn (not sweet corn, but field corn for consumption by livestock or use in ethanol production). My farm is in North East Ohio. I haven't factored in how much of the crop will be lost. I'm just curious if there are any people with expertise in agriculture who can help.

2007-12-26 09:11:55 · 8 answers · asked by J.R.H. 2 in Agriculture

whats wrong with the decimal system

2007-12-26 09:11:44 · 9 answers · asked by pizzaboy 1 in Mathematics

Scientifically, like the sky is blue...

2007-12-26 09:07:51 · 7 answers · asked by Deli D 2 in Physics

This is a probability problem, not a physics problem, so dynamical behavior of solid bodies shall be disregarded. An ideal dumbbell of 2 identical spheres is connected by a solid rod, so that the centers of the spheres are 1 unit apart. There are 2 infinitely long adjacent rows of spherical indentations 1 unit apart, the indentations of both rows being aligned with each other such that the distances between them are also 1 unit apart. The dumbbell is thrown upon these rows at random, so that any one sphere of the dumbbell will come to a rest in any indentation with equal likelihood. What's the probability of the dumbbell landing with one sphere on row 1, and the other on row 2? Give reasoning, please?

2007-12-26 09:07:30 · 4 answers · asked by Scythian1950 7 in Mathematics

Okay, how do you make one state of matter another? Basically.

What would I do to Ice to make it a liquid?
What would I do to Ice to make it a gas?

What would I do to water to make it a solid?
What would I do to water to make it a gas?

What would I do to mist to make it water?
What would I do to mist to make it ice?

Just wondering, thank you! =D

2007-12-26 09:04:20 · 7 answers · asked by Richard S 2 in Chemistry

How do you feel about the tiger being shot dead at the San Francisco Zoo recently?
Link: http://au.news.yahoo.com/071226/2/15dfj.html

2007-12-26 09:03:27 · 19 answers · asked by Crystal C 3 in Zoology