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**1. Homework Statement**

In the figure here, a 12.8 g bullet moving directly upward at 930 m/s strikes and passes through the center of mass of a 8.3 kg block initially at rest. The bullet emerges from the block moving directly upward at 520 m/s. To what maximum height does the block then rise above its initial position?

**2. Homework Equations**

m

_{1}v

_{1i}+ m

_{2}v

_{2i}= m

_{1}v

_{1f}+ m

_{2}v

_{2f}

**3. The Attempt at a Solution**

not sure where i went wrong with this one.