Answer-
-8
Step-by-step explanation:
83.041 in notation form is 80+3+.04+.001
When simplifying an expression, you collect and simplify all the like terms. Since 8x and -12 aren’t like terms, you can’t substract 8-12
By the chain rule,

where
.
We have component partial derivatives






Putting the appropriate pieces together and setting
, we get


To subtract logs, you need to use the log rule, that when you subtract logs, you divide the two arguments and keep the base if it is the same. So divide 24 by 6 and you get 4. So the answer to your question is Log 4 base 5. Hope this helps.