# (ENEM 2021) - Question Hard of Math

A couple decided to invest in an investment fund that has a yield rate of 0.8% per month, in a compound capitalization regime. The final value (F) to be redeemed after 'n' months, at a monthly yield rate (x), is given by the algebraic expression F = C * (1 + x), where C represents the initial capital invested. The couple plans to maintain the investment for the necessary time for the initial capital of R\$ 100,000.00 to double, without any other deposits or withdrawals. By using the table, the couple can determine this number of months. To meet their plan, the number of months determined by the couple is...
a.
1.5.
b.
100.
c.
125.
d.
156.
e.
@

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