1/2 NL hand

Just sat down at the table about 20 minutes ago and havent really played a hand yet.
3 limpers, Hero ($250) limps in from CO with 10d8s.
Sb limps. BB ($350) makes it 12 to go (average stack). MP (300) calls. Hero calls.
Flop comes 10c 8c 3c. BB bets $50 (into $40ish pot). MP folds. Hero calls.
Turn comes 2d. BB checks.
What should Hero do here? (in terms of what to do and how much) Hero has ~$175 left BB has Hero covered by about 100