The correct calculation for momentum using the formula \( P = mv \) would be to multiply the mass (in kg) by the velocity (in m/s).
So, for \( m = 9 , \text{kg} \) and \( v = 5 , \text{m/s} \):
\[ P = (9 , \text{kg}) \times (5 , \text{m/s}) = 45 , \text{kg} \cdot \text{m/s} \]
Looking at the options you provided, the correct one is:
45 kg*m/s = (9 kg) (5 m/s)
This shows the correct calculation of momentum.