Molly always deposit more $40 while Vitto always duplicate the money, so we can withdray 2 equations
For Molly: $ = 40.n
For Vitto: $ = [tex]1.2^{n - 1}[/tex]
where n is the month number and $ the money
So, we can say?
[tex]2^{n - 1}>40n[/tex]
Look, in the 10th month, Vitto will have [tex]2^{10 - 1}[/tex]=512 while Molly will have 40.10 = 400
So, Vitto's balance will be greater after a very long time. A.
