Solve
-Find Out How Long It Takes A $\$ 2900$ Investment to Earn

Multiple Choice

Solve.
-Find out how long it takes a $\$ 2900$ investment to earn $\$ 400$ interest 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) $2.1$ years
B) $1.7$ years
C) $1.9$ years
D) $2.3$ years