The correct response is:
Jamie substituted m=6 into the expression 50⋅2^6=3200.
This indicates that she correctly used the formula for her exponential growth, substituting \( m \) with 6 months to calculate the number of clients. Given that \( 50 \cdot 2^6 = 50 \cdot 64 = 3200 \), this confirms her calculation.