Melody

Excellent presentation Tetration   

Who is Jerry?  If we are going to share a meal you should introduce us first.    

That is what the video said Chris.     :)

I guess it is nice ot have it in print in front of your nose sometimes though.  So thanks :)

150 divided by 55 hours

Arc trig is the same as inverse trig

so use     asin   acos   and   atan

In the first afternoon

5/6 of 258 = 5/6×258=215 were sold

The second afternoon

20% more were sold

20% × 215= 20/100 × 215=1/5×215 = 43

215+43= 258

258 fruit sold 2nd afternoon.

you better check my calculations with a calc :)

Yes Tenacious, I think it is time to move on.  LOL

You need to be more specific.

Are they African, Indian or Pygmy elephants?

Yes what an excellent idea.

Thanks Geno :)

Neither method is completely correct.  Your rules 3 and 4 are not always correct. Especially not rule four.  (Rule 3 is probably ok)

For instance.

my bookcase is 900mm long. In this case one of the zeros is definitely significant.  Maybe both.

so it depends on the exact situation as to whether zeros to the imediate left of the point are significant.

Your physical science teacher does not know what he is talking about.  How rude am I.  

I'd like to explain better but im on my phone and it makes everything harder.