In PERT, the expected project completion time is assumed to be distributed according to a beta distribution

When a small business offers extended hours and home delivery at no additional cost after a large mass market retailer moves into their area, this business is reacting to changes in the ________ environment.

Fill in the blank(s) with correct word.

The concept of ______ is probably the best single measure of an industry's impact.

A. total output B. total spending C. aggregate market value of firms in industry D. value added