David was selected to become a member of a five person team because of his knowledge and experience with three dimensional computer modeling. When he is not present, the group is unable to discuss the technical aspects of their project. Which of the five bases of power does David hold?

When Jacob encounters a family crisis and handles it well, he is pleased to learn that he is able to operate well under high personal stress. Prior to the family crisis, Jacob's knowledge of how he would manage personal stress was in which area of the Johari window?

A) open area B) free area C) blind area D) unknown area E) hidden area

A pharmacist poured a 4% NaCl solution into a flask already containing a NaCl solution of unknown concentration. If the total volume of the mixed solution in the flask is 200 mL and its concentration is 2.5% NaCl, how many milliliters of the 4% NaCl solution was poured into the flask?

A. 125 B. 150 C. 200 D. 250