Entrepreneurs seeking feedback from experts and a chance to win prizes will compete in the third annual Rhode Island Elevator Pitch Contest on Dec. 4, the Rhode Island Business Plan Competition has announced. Participants will present their business proposals in 90 seconds to a panel of judges, the amount of time a person with an idea might get during a chance meeting with a business leader in an elevator. Following each presentation, the judges will give feedback about the clarity and persuasiveness of the presentation and cash prizes totaling $1,000 will be awarded. Registrations to make a pitch are being accepted at www.ri-bizplan.com. The public is invited to the free event at the Greater Providence Chamber of Commerce in downtown Providence.