With only one layer, you have the choice. It's a little more expensive to strip first, about 25% more, but an advantage of stripping is that your roofer will have the opportunity to replace damaged sheathing. Shingles nailed into splintered sheathing may not hold well.
Below you can see some of the things you might choose to do with your MBA degree: 1. Become a teacher at a college: After you obtain your Masters degree, you are qualified to apply at local universities and colleges. Since, these institutions ask for someone with experience, do not miss an opportunity to speak, mentor, teach community education classes, deliver panels, etc.
I think for most a MBA is more applicable, as a major. If you want to develop a product or service for a specific audience or sector, a general business or MBA degree is probably more useful. You'll need general management skills and knowledge, and exposure to corporate finance, accounting and marketing. These things are not covered in economics specifically.