To find out how much Ms. Tanaka will earn for selling 12 televisions, we will substitute \( t = 12 \) into the given equation \( 2,500 + 100t \).
\[ Earnings = 2,500 + 100t \]
Substituting \( t = 12 \):
\[ Earnings = 2,500 + 100(12) \] \[ Earnings = 2,500 + 1,200 \] \[ Earnings = 3,700 \]
So, Ms. Tanaka will earn $3,700 for selling 12 televisions this month.
The correct response is $3,700.