4/5x-1/5x=9

(4x)/5-(1x)/5=9

(3x)/5=9

3x=45

x=15

sine a = 0,0034296

a = inverse sin 0.0034299     OR  A=asin 0.0034296

$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{sin}}^{\!\!\mathtt{-1}}{\left({\mathtt{0.003\: \!429\: \!6}}\right)} = {\mathtt{0.196\: \!501\: \!990\: \!634^{\circ}}}$$

That is a very tiny angle !   :)

Yes TR but if we could not torture you and the others of your generation , where would the fun be in life ???

Thanks Chris,   

I can never remember this.

Is Mrs Nauseated pregnant?    Congratulations !

The name you have inflicted upon her will suit her well for a while :/

My goodness, that is excessively polite for you Nauseated !

Are you unwell ?

 @@ End of Day Wrap   Sat 1/8/15     Sydney, Australia Time   10:42pm  ♪ ♫

Hi all,

It was quite but it always amazes me how busy I am on a quiet day 

Anyway there were some great answers from CPhill, Alan and EinsteinJr.  Thank you.  I hope I didn't miss anyone.

What about it?

You have specifically asked me to answer this so I will.

I would never use words like thse because they are not generally understood.

Numbers this large are expressed in scientific notation.

If you want to know what each of these numbers are then google them.  I mean google "quintrillion"

Alright, I did that one.  It is 1 followed by 18 zeros.  

So 670 quintrillion = 670,000,000,000,000,000,000

You can do the others and then add them all together :)