Petition Amendment is in RFE. How much time to process & Can i travel with 1-797,1-129,New LCA notice receipt

USA H1B Visa
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Petition Amendment is in RFE. How much time to process & Can i travel with 1-797,1-129,New LCA notice receipt.

Also Can i travel on B1 Visa for 2 weeks for emergency meeting. while my h1B amendement is under RFE status