Solve the Problem $7.5 \%$ Annually How Many Years Will It Take for This Country

Multiple Choice

Solve the problem.
-There are currently 57 million cars in a certain country, increasing by $7.5 \%$ annually. How many years will it take for this country to have 85 million cars? Round to the nearest year.

A) $3 \mathrm { yr }$
B) $4 \mathrm { yr }$
C) $44 \mathrm { yr }$
D) $5 \mathrm { yr }$