To find out how much Ms. Tanaka will earn for selling 12 televisions, we can use the formula given:
\[ \text{Total Earnings} = 2,500 + 100t \]
Substituting \( t = 12 \) into the equation:
\[ \text{Total Earnings} = 2,500 + 100 \times 12 \]
Calculating \( 100 \times 12 \):
\[ 100 \times 12 = 1,200 \]
Now, add that to the base salary:
\[ \text{Total Earnings} = 2,500 + 1,200 = 3,700 \]
So, Ms. Tanaka will earn $3,700 for selling 12 televisions this month.
The correct response is:
$3,700