Answer :
If there is a 5% drop every month, then the class becomes 1-5%=1-0.05=0.95 times the previous size.
The formula for [tex]t[/tex] months would be
[tex]100*0.95^{t}[/tex]
so for 12 months it would be
[tex]100*0.95^{12}\approx 54[/tex]
The formula for [tex]t[/tex] months would be
[tex]100*0.95^{t}[/tex]
so for 12 months it would be
[tex]100*0.95^{12}\approx 54[/tex]