No, a B-1/B-2 visa does not allow you to work or enroll in academic courses in the U.S. You must obtain the appropriate visa or status for those purposes, but a B-1 allows you to enter the US to attend meetings, interviews, start a business, and negotiate contracts.
Yes, you can reapply for a visitor visa even if you have been previously denied. However, it’s important to address the reasons for the previous denial and ensure that your new application is well-prepared and supported by strong documentation.