Dream of attending the MIT Sloan School of Management to earn your MBA? Then, you don’t want to miss the live chat event on Tuesday, April 21, 2009, at noon ET on admissions at MIT Sloan. BusinessWeek’s guests will be Julie Strong, senior associate director for MBA Admissions, and Jennifer Burke Barba, assistant director of MBA Admissions at MIT Sloan. They’ll be answering your questions on…