Answer:
8
Step-by-step explanation:
When you subtract the 9-1=8
Folding a paper will make it thickness become double from it before.
Unfolded paper has 1 thickness
1 times folded paper has 2 thickness
2 times folded paper has 4 thickness
3 times folded paper has 8 thickness
From here it is clear that the pattern is

. SInce the paper is 0.1mm, then the function would be:
f(n)=

x 0.1mm
Y=(-9--4) + (-3--7)
ALWAYS USE PEMDAS FORMULAS.
Answer:
Hope its help you..
Step-by-step explanation: