Solve the Problem $\$ 2,700$ Investment to Double If It Is Invested At

Multiple Choice

Solve the problem.
-Find out how long it takes a $\$ 2,700$ investment to double if it is invested at $7 \%$ compounded semiannually. Round to the nearest tenth of a year. Use the formula $A = P \left( 1 + \frac { r } { n } \right) ^ { n t }$ .

A) $9.9$ years
B) $10.3$ years
C) $10.5$ years
D) $10.1$ years