Melody

Can you fix yours up please GoldenLeaf.  The answer is right but you need brackets.

There are a few answerers here who understand physics very well.  They are none here at present but if you leave your well presented question it is highly likely that you will recieve a good answer within the next 10 to 24 hours.  

Ummmm?

Needs illustration.

Yes, that clip is certainly different.  I think that I liked it. 

But in the end, a logarithm is a power (or exponent)

$$1000=10^3\\\\
\mbox{therefore}\\\\
log_{10}1000=3$$

Just hit return on your keyboard

Friday 30/5/14

Manipulating logs (Thanks for the demo Alan)

Not agreed, we have a huge number of immigrants who have become nationalized.  they belong to our nation but they were not born here.  Sorry reinout-g I only just read your next sentence.

I am nit picking too.  The world population is still irrelevant.

Stupid illogical school problems.  Just give the teachers what they want - that's how you pass a test!

you could always be clever and state why the question is stupid and then give the teachers what you think they want  (or vice versa).  I'd probably do that!

Look here and all will be explained.

It is the second button on the top row 

but you can just type in pi, that is what i do!