Answer:
it's 8
Step-by-step explanation:
just get 72 and divide it by 9 and that's the average over the 9 years.
For this case we must find an expression equivalent to:
By definition of power properties we have to meet:

So, rewriting the expression we have:

Answer:
Option B

You can do it if you believe in your self!
Log number 1 find catalog 5 - 4 = 1 . ( f .g ) 1 log = 0
Yes it is an irrational number