Science & Mathematics - 29 November 2006

Find all real solutions for: (next steps to "see this")
log_3(log_2(12x))=1

Many thanks!

2006-11-29 08:21:59 · 6 answers · asked by mdetaos 3 in Mathematics

I just can't figure it out, step by step please!

23 - 11c
--------- = 5c
7

2006-11-29 08:20:47 · 4 answers · asked by Anonymous in Mathematics

2006-11-29 08:19:47 · 16 answers · asked by RICHARD G 1 in Mathematics

A 750W toaster and a 1200W electric frying pan are plugged into the same 100v outlet. How much will it cost to operate the two aplliances at 8¢ per kW.h?

My Work:

750W = 0.75kW
1200W = 1.2kW
0.75kW+1.2kW = 1.95kW
8¢/kW.h = $0.08/kw.h

Therefore: 1.95kW.h x $0.08/kW.h = $0.156

Am i right?
-----------------------------------------------------------------------------------
My teacher told us that the answer is $1.56. So please help me.

PS: Where I have converted the 750 and 1200 W into kW (that is correct), but when i calculate the final cost i put 0.75kW.h and 1.2kW.h <<-- is adding the .h at the end like that allow?

2006-11-29 08:19:18 · 4 answers · asked by Anonymous in Physics

Sometimes it's so obvious they're not even attempting to do their own work. Some of them even say to show your work!!!

2006-11-29 08:18:46 · 20 answers · asked by Tina 3 in Mathematics

2006-11-29 08:18:30 · 2 answers · asked by razma r 1 in Chemistry

Evaluate the integral under the interval [-1,3]

abs[x- (x^2)]

This reads the "absolute value of function x minus x squared".

2006-11-29 08:17:02 · 2 answers · asked by What gives? 5 in Mathematics

try to obtain estimates of the value of y when x = 1.6 by using each of :

(i)Euler’s method,
(ii)The fourth-order Runge-Kutta method :

Yn+1 = Yn + 1/6(k1+ 2K2+2k3=k4)

Where

k1= hf(Xn,Yn)
k2= hf(Xn+1/2h ,Yn+ 1/2K1)
k3= hf(Xn+1/2h ,Yn+ 1/2K2)
k4= hf(Xn+h ,Yn+K3)

Find the exact solution of the above O.D.E.. How does the exact value of y when x = 1.6 compare with your estimates obtained in (a) ? Would you expect the results you would have obtained if you had used a smaller step size (e.g. h = 0.1 or h = 0.05) to have been much better ? Explain your answer.

how do you do this

2006-11-29 08:14:50 · 4 answers · asked by Glendon 1 in Mathematics

2006-11-29 08:13:06 · 4 answers · asked by Kylie 1 in Physics

let f be the function defined by:
f(x)=
-square root(x+1) when x is greater than or equal to 0 & less than or equal to 3.
- & (5-x) when x is greater than 3 & less than or equal to 5.

suppose thte function is defined by:
g(x)=
-k(square root(x+1)) when x is greater than or equal to 0 & less than or equal to 3.
-& (mx+2) when x is greater than 3 & less than or equal to 5.
where k & m are constants.

If g is differentiable at x = 3, what are the values of k & m?

2006-11-29 08:13:06 · 3 answers · asked by Anonymous in Mathematics

2006-11-29 08:13:00 · 3 answers · asked by Anonymous in Mathematics

Have scientists made a human clone yet??? I just learned in science today that they have cloned a sheep. I wuz just curious about it...

2006-11-29 08:11:59 · 26 answers · asked by Anonymous in Other - Science

which number between 80 and 89 has the greatest number of different prime facyors?

2006-11-29 08:11:56 · 9 answers · asked by badboys_218@verizon.net 1 in Mathematics

2006-11-29 08:11:53 · 8 answers · asked by a v 1 in Chemistry

2006-11-29 08:11:52 · 6 answers · asked by Kylie 1 in Physics

I want to ask If an element have:
Melting point:3000 degree
Boiling point:4500 degree
Soluble in water: no
Cond solid: yes
cond in H2O sol: no
cond malten: yes

Then what is its bonding?
and example for this element

Moreover how can I find the answer?
thanks a lot.

2006-11-29 08:11:43 · 6 answers · asked by moon_about_masa 1 in Chemistry

How do i apply a transformation that doubles the amplitude of a tangent wave? I know this would go against all the rules but do I put 2[infinity] towards the end of the y-axis of the graph?

2006-11-29 08:11:12 · 1 answers · asked by gee.tar1 1 in Mathematics

2006-11-29 08:10:54 · 6 answers · asked by freeminder 2 in Physics

My favorite planet is saturn.

2006-11-29 08:08:37 · 18 answers · asked by Anonymous in Astronomy & Space

I need the answer to wut s equals, 12s-5s+6=55

2006-11-29 08:06:51 · 9 answers · asked by Anonymous in Mathematics

It would be interesting to have such a craft seek out new life and new civilizations in one of the many universes scientists know of. And even enter another demension to send back data. There would have to be a relay satellite at the edge of the other universe and/demension to relay the data back to earth because of the distance involved. What do you think?

2006-11-29 08:06:10 · 15 answers · asked by ZORRO 3 in Astronomy & Space

I notice that with changing weather I get light headed, weak and so tired. This also bring on some anxiety.... does anyone else have this problem? And if so how do you deal with it?

2006-11-29 08:05:33 · 5 answers · asked by Queen of Kings 4 in Weather

How can you cut a circular region into two parts that have the same area but are not congruent?

Please state exactly how to do it. Its just a circle and cutting it in half obviously doesn't work.

2006-11-29 08:05:25 · 4 answers · asked by sdeasfdwadf 1 in Mathematics

who would win?

2006-11-29 08:05:16 · 14 answers · asked by h 1 in Zoology

calcium hydroxide reacts with phosphoric acid to produce water and calcium phosphate.

I think it would be like

Ca(OH)2 + H3PO4 = H2O + Ca3(PO4)2

But then i don't know how to balnce it beaciuse i cant find any numbers that could work, unless i got my equation wrong

2006-11-29 08:02:55 · 2 answers · asked by hahahatso 1 in Chemistry

50r=(e^20r)-1

Find the value of r.

2006-11-29 08:02:54 · 2 answers · asked by Anonymous in Mathematics

2006-11-29 07:58:22 · 4 answers · asked by odetteartwell 1 in Biology

2006-11-29 07:56:45 · 4 answers · asked by LaLa 1 in Mathematics

2006-11-29 07:55:03 · 6 answers · asked by bob marley 1 in Zoology

2006-11-29 07:52:55 · 7 answers · asked by Justin 2 in Astronomy & Space